Morphological Characteristics of Healthy and Osteoarthritic Joint Surfaces in Archaeological Skeletons

Osteoarthritis is a major health concern in living populations, as well as being one of the most common pathological lesions identified in the archaeological record. The aetiology of the disease remains unclear, with a multi‐factorial influence of physical strain, age, genetics, and obesity. Previous studies have identified a relationship between the presence of knee osteoarthritis on the distal femoral joint and the morphology of the intercondylar notch, patellar groove, and medial condyle. The current study expands this research to investigate the relationship between distal femoral, distal humeral, and proximal ulnar joint morphology and osteoarthritis with 3D shape analysis techniques. These methods provide a more detailed analysis of joint morphology in order to determine any relationship between 3D shape and osteoarthritis. The results indicate a complex relationship between joint shape and knee osteoarthritis, with eburnated right femora showing a statistically significant association. The shapes associated with eburnated or affected femoral joints can be explained by osteophyte development, and therefore likely represent systematic shape changes and not a particular joint shape predisposing individuals to the condition. There was no identifiable relationship found in the proximal ulna or distal humerus, indicating that joint shape is unlikely to influence the development of the condition in the elbow joint and that any shape changes produced by osteoarthritis are not systematic or quantifiable. The joints analysed in this study were highly influenced by asymmetry, sexual dimorphism, and allometry, resulting in a small sample size of affected joints in many datasets. Further analyses of large skeletal samples are needed to more thoroughly investigate the possible relationship of distal femoral joint shape and osteoarthritis. Copyright © 2013 John Wiley & Sons, Ltd.     

Morphological changes in the shape of the non‐pathological bony knee joint with age: a morphometric analysis of the distal femur and proximal tibia in three populations of known age at death

This study examines possible morphological variation in the knee joint of Homo sapiens with increasing age in ostensively healthy and non‐pathological distal femora and proximal tibiae. Throughout the lifetime of each individual, the hard tissue of the knee undergoes considerable remodelling as a response to biomechanical stresses, changes in bone microarchitecture and reduction of bone mineral content as a concomitant of ageing. The knee is also subject to greater levels of degenerative joint disease than any other joint. If death occurs whilst such diseases are in the earliest stages, initial bone changes may not be visually obvious in museum specimens. If such specimens are used for comparative analyses, it is hypothesised that changes might render it problematic if all ages are conglomerated into discrete samples. This study therefore investigates the degree to which the distal femur and proximal tibia change shape during ageing and, if changes are present, whether they are expressed similarly in males and females. It also examines whether changes are of greater magnitude than those morphological differences which might exist between populations. In an example population of African‐Americans, results indicate that there is a statistically significant difference in shape between age groups and those differences become progressively greater between the youngest and oldest adults. Results also show that although morphological variation caused by ageing is apparent, those shape differences attributable to sexual dimorphism are more powerful. When two additional populations are analysed jointly with the African‐Americans (Caucasian Americans and the European Spitalfields sample), results indicate that inter‐population shape differences are considerably greater than differences caused by increasing age. Results imply that it is justifiable to combine specimens of all ages into discrete samples for comparative purposes. Copyright © 2007 John Wiley & Sons, Ltd.     

Of Navies and Navels: Britain as A Mental Island

In this paper, the conception of .Great Britain. — a wholly unsatisfactory nomenclature — as an island nation is examined. In this case, a relatively small land mass acted as an originary point of departure for outward‐bound Great Power projections across the open spaces of seas. This paper further explores the varied implications for nationalism within Britain of the diverse island ‘roots’ of the British navel and the ‘routes’ of British navalism. Three themes recur in the popular mobilization of British maritime island nationalism: the besieged island, the island as universal exemplar of civilization, and the navy as national protector. Some consideration is given to the significance of island symbols such as Britannia as a marker of the fate of great island nationalism.     

Evidence of Geometric Operators used to Shape Ancient Hulls

In some shipwrecks we can recognize factors such as units of measurement, use of segments and arcs, and repetition of shapes, which may have been rationalised during the transition from craft shipbuilding to a formal design process. This is an a posteriori assessment, as we do not know how hull‐shapes were planned and controlled in Antiquity. However the Cheops boat, and the Madrague de Giens, Anse des Laurons II, Fiumicino 4 and Yassi Ada II wrecks, display measurements and geometries suggesting rational approaches to hull‐moulding, with principles common to those of medieval and Renaissance shipbuilding and the traditional Mediterranean garbi. © 2012 The Author     

Separating Sheep (Ovis aries L.) and Goats (Capra hircus L.) Using Geometric Morphometric Methods: An Investigation of Astragalus Morphology from Late and Final Bronze Age Central Asian Contexts

Many qualitative and quantitative methods for the separation of sheep and goat bones are based upon Middle Eastern, Mediterranean and European specimens. However, these methods may not be as applicable in other geographical contexts due to regional morphological variation. In order to address this, both traditional and geometric morphometric methods were applied to sheep, (Ovis aries L.) and goat (Capra hircus L.) astragali from archaeological sites from Kazakhstan dating to the Late and Final Bronze Age (1900–900 bce ). This exploratory research confirmed that qualitative features remained useful for distinguishing between species, while traditional morphometric methods were unable to conclusively support the field identification of species. Geometric morphometric methods found significant morphological differences between species and confirmed group membership while exploring specific qualitative features that were effective in distinguishing between sheep and goat in Central Asian contexts. Copyright © 2016 John Wiley & Sons, Ltd.     

Morphometric identification of bovid metapodials to genus and implications for taxon-free habitat reconstruction

Principal Components Analysis (PCA) of measurements on twelve metacarpal and ten metatarsal dimensions indicates that metapodials differ much more in size than in shape among the twenty-three genera of extant Sub-Saharan bovids. The only conspicuous shape variation is in metapodial length, which sometimes differs significantly among genera that are similar in all other dimensions. It follows that Discriminant Analysis (DA) intended to identify metapodials to genus will depend primarily on size, and except for the occasional like-sized genera that differ in metapodial length, DA will often confuse genera of similar size. DA of the same metapodials subjected to PCA supports this prediction. PCA further shows that bovid species that favor the same habitat often differ in metapodial size, shape, or both, and species that favor different habitats often overlap substantially in their metapodial morphometrics. DA intended to assign metapodials to habitat will thus produce different results depending on the species used to characterize each habitat type and on the number of specimens by which each species is represented. Habitat reconstruction founded in DA is therefore taxon dependent rather than taxon-free, and it cannot supplant reconstruction based on taxonomic identifications below the family level.     

Quantifying Ship Shape in Archaeology: Evaluating 3D Geometric Morphometrics

The analysis of the archaeological remains of ships and boats, in particular hull shapes, have been central to wider analysis of performance, function, and significance within past societies. This article reviews established methods of quantifying shape in ship and boat archaeology—linear measurement ratios and form coefficients—and evaluates the utility of 3D geometric morphometrics (GM). The 3D shape of 30 vessels from north‐west Europe dating between 325 BC and AD 1915 are quantified to study how hull shape relates to a vessel's function and intended operating environment. A comparison of the three methods highlights the importance of analysing the complexity of a hull in a holistic manner and demonstrates that 3D GM outperforms the traditional methods.     

蚌埠双墩遗址几何类刻划符号试释

蚌埠双墩遗址出土的陶器刻划符号是研究早期文字形成和文明发展的重要材料。其中,几何类刻划符号具有表现某些原始思想观念和简单记事的功能。水纹系列刻划符号主要是表现水波起伏的动态形象;"圆圈形"符号可能和"天"有关;"半框形"、"方框"和"十字形"符号可能和"地"和"四方"有关。     

Morphospace occupation of temnospondyl growth series: a geometric morphometric approach

A morphometric analysis based on 16 landmarks (specific geometric points) identified on the skull roof of different growth stages of various temnospondyls revealed patterns of shape change during ontogeny. Data from 50 individuals from 12 taxa, encompassing euskelians (dissorophoids, eryopids and zatracheids) and stereospondylomorphs were plotted in a morphospace diagram defined by two principal-component axes (PC 1 and PC 2) of a principal-component analysis of the shape variables. The morphospace occupation reflects phylogenetic relationships of the main clades of temnospondyls. All stereospondylomorphs investigated here have similar ontogenetic trajectories with long intervals on PC 1. Eryopids and zatracheids have shortened their trajectories on PC 1 and are separated in morphospace relative to the stereospondylomorphs and dissorophoids. Outgroup comparison with Cochleosaurus bohemicus (Fri?, 1876 Fri?, A. 1876. Über die Fauna der Gaskohle des Pilsner und Rakonitzer Beckens. Sitzungsberichte der Königlichen Böhmischen Gesellschaft der Wissenschaften, 1875: 70–79.  [Google Scholar]) suggests that a long ontogenetic trajectory with gradual development represents the plesiomorphic condition for temnospondyls. More derived stereospondylomorphs (among the taxa considered here, but excluding groups such as derived rhytidosteids and brachyopoids) increased the length of their trajectories on PC 1 and show a peramorphic pattern, resulting in the long and slender skull of piscivorous predators. Dissorophoids exhibit truncated ontogenetic trajectories and occupy the morphospace region of larval stereospondylomorphs, thus attaining a paedomorphic appearance probably by hypomorphosis. Amphibamid and branchiosaurid dissorophoids have clearly distinguishable larval and postlarval developments, indicating that these forms had evolved a lissamphibian-like type of metamorphosis.