A brief note on Early Abbasid stucco decoration. Madinat al-Far and the first Friday Mosque of Isfahan

The aim of this paper is to demonstrate how an in-depth study of the stucco decoration could be useful in dating different phases of the Early Abbasid period in the absence of other precise archaeological evidence. Two case studies are presented: the residence of Madinat al-Far in Syria and the Early Abbasid Mosque of Iṣfahān in Iran

A matter of timing: the modern history of a ‘Sasanian’ silver plate from Rashy

After the recent publication of two previously unknown “Sasanian” silver plates depicting the renowned scene of the chariot of the Lunar God Mah, added to the other five known examples, this article reconsiders one specimen of this series of objects – here addressed as the “Rashy plate” –, the authenticity of which appears questionable. Three parameters are considered for discussing this plate: iconography, manufacturing technique and provenance, and all of them are contextualised in the period of the great exhibitions of Persian Art (between the 1930s and the 1960s). The outcome of these exhibitions, besides stimulating scholarly research on previously understudied artistic productions, was the consequent rising interest by museums and private collectors in art objects from the ancient Iranian world. The introduction of possible forgeries, such as the Rashy plate, coherently fits into this increasing demand of the art market

Adult-type rhabdomyoma of the larynx: clinicopathologic study of an uncommon tumor in a rare location

Rhabdomyoma is an uncommon benign mesenchymal tumor with skeletal muscle differentiation that may occur either in the heart or in extra-cardiac sites. Even though the head and neck region is the most common area of extra-cardiac rhabdomyoma, the larynx is rarely involved. We present the case of an 85-year-old woman who reported a 10-day history of breathing difficulties, dysphagia and dysphonia. A computed tomography scan of the head and neck showed a contrast-enhanced, solid hypopharyngeal-laryngeal neoplasm with well-defined margins causing subtotal obliteration of the right pyriform sinus and a reduction in air lumen of the laryngeal vestibule. The patient underwent complete endoscopic removal of the lesion; histologic examination revealed an adult- type rhabdomyoma based on the histologic features and the immunoreactivity of the neoplastic cells for desmin, myoglobin and muscle-specific actin but not for cytokeratin, S-100, CD68R, chromogranin-A and synaptophysin. Since clinical and imaging features are not specific for rhabdomyoma, histologic examination and immunohistochemical analyses play a central role in the differential diagnosis of the adult-type rhabdomyoma from other laryngeal neoplasms. A correct diagnosis is mandatory to avoid inappropriate treatment

The economic performance of urban gardening in three European cities – examples from Ljubljana, Milan and London

Urban gardening is not a new phenomenon but it has received considerably more practical and academic interest in recent years. Studies on economic aspects such as crop yields, inputs and outputs of production, productivity, gross margins and the contribution to home economics are rare, especially in Europe. While urban gardening plays an important role in the Global South, its role in Western Europe for food productivity and home eco- nomics is currently under-researched. The aim of this study is to analyse European urban gardeners\u2019 economic performance and self-sufficiency on a household level, as well as to reach a better understanding of their con- tribution to food self-provision and food security in the metropolitan areas. In a study carried out in 2014 with on-site personal and with online questionnaires participated 180 urban gardeners from three case study cities (Ljubljana, Milan, and London). Results from the economic analysis showed that although for most urban gar- deners, profit is not their main motivation, the economic calculation shows that productivity in small urban plots can be comparable to market garden production. Urban gardeners are saving money, especially when, compared to retail prices for regular produce or organic produce, their input is included in the gross margin calculation. We conclude that, in the case-study cities, the self-provisional potential of urban gardeners\u2019 households to ade- quately cover the annual vegetable need of five-a-day servings can be met under three conditions: (1) sufficient garden size; (2) increased area productivity, and (3) sufficient labour-hour inputs

Characterization of biocompatible scaffolds manufactured by fused filament fabrication of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate

We characterize poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH) scaffolds for tissue repair and regeneration, manufactured by three-dimensional fused filament fabrication (FFF). PHBH belongs to the class of polyhydroxyalkanoates with interesting biodegradable and biocompatible capabilities, especially attractive for tissue engineering. Equally, FFF stands as a promising manufacturing technology for the production of custom-designed scaffolds. We address thermal, rheological and cytotoxicity properties of PHBH, placing special emphasis on the mechanical response of the printed material in a wide deformation range. Indeed, effective mechanical properties are assessed in both the linear and nonlinear regime. To warrant uniqueness of the material parameters, these are measured directly through digital image correlation, both in tension and compression, while experimental data fitting of finite-element analyses is only adopted for the determination of the second invariant coefficient in the nonlinear regime. Mechanical data are clearly porosity dependent, and they are given for both the cubic and the honeycomb infill pattern. Local strain spikes due to the presence of defects are observed and measured: those falling in the range 70\u2013100% lead to macro-crack development and, ultimately, to failure. Results suggest the significant potential attached to FFF printing of PHBH for customizable medical devices which are biocompatible and mechanically resilient

Human umbilical cord blood-borne fibroblasts contain marrow niche precursors that form a bone/marrow organoid in vivo

Human umbilical cord blood (CB) has attracted much attention as a reservoir for functional hematopoietic stem and progenitor cells, and, recently, as a source of blood-borne fibroblasts (CB-BFs). Previously, we demonstrated that bone marrow stromal cell (BMSC) and CB-BF pellet cultures make cartilage in vitro. Furthermore, upon in vivo transplantation, BMSC pellets remodelled into miniature bone/marrow organoids. Using this in vivo model, we asked whether CB-BF populations that express characteristics of the hematopoietic stem cell (HSC) niche contain precursors that reform the niche. CB ossicles were regularly observed upon transplantation. Compared with BM ossicles, CB ossicles showed a predominance of red marrow over yellow marrow, as demonstrated by histomorphological analyses and the number of hematopoietic cells isolated within ossicles. Marrow cavities from CB and BM ossicles included donor-derived CD146-expressing osteoprogenitors and host-derived mature hematopoietic cells, clonogenic lineage-committed progenitors and HSCs. Furthermore, human CD34+ cells transplanted into ossicle-bearing mice engrafted and maintained human HSCs in the niche. Our data indicate that CB- BFs are able to recapitulate the conditions by which the bone marrow microenvironment is formed and establish complete HSC niches, which are functionally supportive of hematopoietic tissue

Advances in geometrical parametrization and reduced order models and methods for computational fluid dynamics problems in applied sciences and engineering: overview and perspectives

Several problems in applied sciences and engineering require reduction techniques in order to allow computational tools to be employed in the daily practice, especially in iterative procedures such as optimization or sensitivity analysis. Reduced order methods need to face increasingly complex problems in computational mechanics, especially into a multiphysics setting. Several issues should be faced: stability of the approximation, efficient treatment of nonlinearities, uniqueness or possible bifurcations of the state solutions, proper coupling between fields, as well as offline-online computing, computational savings and certification of errors as measure of accuracy. Moreover, efficient geometrical parametrization techniques should be devised to efficiently face shape optimization problems, as well as shape reconstruction and shape assimilation problems. A related aspect deals with the management of parametrized interfaces in multiphysics problems, such as fluid-structure interaction problems, and also a domain decomposition based approach for complex parametrized networks. We present some illustrative industrial and biomedical problems as examples of recent advances on methodological developments. \ua9 The author