74 research outputs found
Multi-orbit cyclic subspace codes and linear sets
No full textCyclic subspace codes gained a lot of attention especially because they may
be used in random network coding for correction of errors and erasures. Roth,
Raviv and Tamo in 2018 established a connection between cyclic subspace codes
(with certain parameters) and Sidon spaces. These latter objects were
introduced by Bachoc, Serra and Z\'emor in 2017 in relation with the linear
analogue of Vosper's Theorem. This connection allowed Roth, Raviv and Tamo to
construct large classes of cyclic subspace codes with one or more orbits. In
this paper we will investigate cyclic subspace codes associated to a set of
Sidon spaces, that is cyclic subspace codes with more than one orbit. Moreover,
we will also use the geometry of linear sets to provide some bounds on the
parameters of a cyclic subspace code. Conversely, cyclic subspace codes are
used to construct families of linear sets which extend a class of linear sets
recently introduced by Napolitano, Santonastaso, Polverino and the author. This
yields large classes of linear sets with a special pattern of intersection with
the hyperplanes, defining rank metric and Hamming metric codes with only three
distinct weights.Comment: Title and the organization of the paper have been changed. Accepted
for publication for Finite Fields and Their Application
Saturating linear sets in PG(2,q4)
No full textBonini, Borello and Byrne started the study of saturating linear sets in Desarguesian projective spaces, in connection with the covering problem in the rank metric. In this paper we study 1-saturating linear sets in PG(2, q4), that is Fq-linear sets in PG(2, q4) with the property that their secant lines cover the entire plane. By making use of a characterization of generalized Gabidulin codes, we prove that the rank of such a linear set is at least 5. This answers to a recent question posed by Bartoli, Borello and Marino. (c) 2024 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http:// creativecommons .org /licenses /by /4 .0/)
Innovative and Sustainable Solutions for the Organization of Energy and Service Networks in Historical Centres
No full textFollowing the decrees issued after the earthquake of 2009 and the Reconstruction Plans presented, the 53 municipalities of the earthquake crater have been under reconstruction for years. However, the regeneration and enhancement of these villages, in addition to the reconstruction of the building, can not be separated from the sustainable redevelopment of all those elements that contribute to the quality of urban life, such as infrastructure, services and common areas. With regard to them, the widespread tendency is to carry out individual localized
interventions, replacing or restoring parts of obsolete systems. The purpose of this paper is to illustrate a methodology which, through the extrapolation and classification of the various characteristics of the centres, provides guidance on
the type of intervention to be carried out, with large-scale planning upstream. The aim is to enhance the value of smaller historic centres, through the efficiency and enhancement of energy infrastructure and networks, with the adoption of compatible innovative technologies, in order to ensure sustainable and long-lasting interventions and aiming at maintenance that takes advantage of new intelligent technologies
Reply: "An expert forum for the histologic of endometriomas"
No full textFertil Steril. 2007 Feb;87(2):362-6. Epub 2006 Nov 13. Histologic analysis of endometriomas: what the surgeon needs to know. Muzii L, Bianchi A, Bellati F, Cristi E, Pernice M, Zullo MA, Angioli R, Panici PB. Source Department of Obstetrics and Gynecology, University Campus Bio-Medico of Rome, Rome, Italy. [email protected] Abstract OBJECTIVE: To evaluate by thorough pathologic analysis the histologic features of the endometrioma wall excised at laparoscopy. DESIGN: Prospective series of consecutive patients. SETTING: Tertiary care, university hospital. PATIENT(S): Fifty-nine patients with ovarian endometriomas. A total of 70 cysts were examined. INTERVENTION(S): Patients underwent operative laparoscopy with the stripping technique for excision of the ovarian endometrioma. MAIN OUTCOME MEASURE(S): A thorough histologic examination was performed on the entire cyst wall specimen. RESULT(S): Histologic examination confirmed the endometriotic nature of the cyst in 100% of the cases. The inner wall of the endometrioma was covered by endometriotic tissue on 60% of the surface. The mean cyst wall thickness was 1.4 mm. The mean value of maximal depth of endometriosis penetration in the endometrioma wall was 0.6 mm. In 99% of the cases the maximal penetration of the endometriotic tissue was 1.5 mm. These histologic data may help the gynecologic laparoscopist select the surgical approach that maximally preserves healthy ovarian tissue. Comment in Fertil Steril. 2007 Oct;88(4):1017-8; author reply 1018-9. Fertil Steril. 2007 Aug;88(2):534; author reply 534-5
Vertex properties of maximum scattered linear sets of PG(1,q^n)
No full textIn this paper we investigate the geometric properties of the configuration consisting of a subspace Γ and a canonical subgeometry Σ in PG(n−1,qn), with Γ∩Σ=0̸. The idea motivating is that such properties are reflected in the algebraic structure of the linear set which is projection of Σ from the vertex Γ. In particular we deal with the maximum scattered linear sets of the line PG(1,qn) found by Lunardon and Polverino (2001) and recently generalized by Sheekey (2016). Our aim is to characterize this family by means of the properties of the vertex of the projection as done by Csajbók and the first author of this paper for linear sets of pseudoregulus type. With reference to such properties, we construct new examples of scattered linear sets in PG(1,q6), yielding also to new examples of MRD-codes in Fq6×6 with left idealizer isomorphic to Fqjavax.xml.bind.JAXBElement@2fd8e0d8
Small-Animal <sup>18</sup>F-FDG PET for Research on <i>Octopus vulgaris</i>: Applications and Future Directions in Invertebrate Neuroscience and Tissue Regeneration
No full textThis study aimed at developing a method for administration of 18F-Fludeoxyglucose (18F-FDG) in the common octopus and micro-positron emission tomography (micro-PET) bio-distribution assay for the characterization of glucose metabolism in body organs and regenerating tissues. Methods: Seven animals (two with one regenerating arm) were anesthetized with 3.7% MgCl2 in artificial seawater. Each octopus was injected with 18-30 MBq of isosmotic 18F-FDG by accessing the branchial heart or the anterior vena cava. After an uptake time of ~50 minutes, the animal was sacrificed, placed on a bed of a micro-PET scanner and submitted to 10 min static 3-4 bed acquisitions to visualize the entire body. To confirm the interpretation of images, internal organs of interest were collected. The level of radioactivity of each organ was counted with a γ-counter. Results: Micro-PET scanning documented a good 18F-FDG full body distribution following vena cava administration. A high mantle mass radioactivity facing a relatively low tracer uptake in the arms was revealed. In particular, the following organs were clearly identified and measured for their uptake: brain (standardized uptake value, SUV max of 6.57±1.86), optic lobes (SUV max of 7.59±1.66) and arms (SUV max of 1.12±0.06). Interestingly, 18F-FDG uptake was up to threefold higher in the regenerating arm stumps at the level of highly proliferating areas. Conclusion: This study represents a stepping-stone over the use of non-invasive functional techniques to address questions relevant to invertebrate neuroscience and regenerative medicine
New Readings of Silvina Ocampo: Beyond Fantasy ed. by Patricia N. Klingenberg, and Fernanda Zullo-Ruiz
No full textIn lieu of an abstract, here is a brief excerpt of the content:
New Readings of Silvina Ocampo: Beyond Fantasy is edited by Patricia Klingenberg and Fernanda Zullo-Ruiz, two leading scholars on Ocampo. The genesis of the volume took place in 2003 in Buenos Aires, while attending a conference on the author. Their intent as editors was to systematize scholarship, and promote a reflection among scholars on existing literature dedicated to Silvina. The book is comprised of eight essays/chapters by various experts, two essays written by the editors, and an afterword. In this collection, we find literature review and three major trends of analysis: Ocampo\u27s pervasive narrative ambiguity, her resort to and subversion of traditional models of classical and popular literature, and what I would call the Borgesian Ocampo with a focus on metaliterature and rewriting
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