125 research outputs found
Images in vascular medicine. Giant abdominal aortic aneurysm.
No full textAbdominal aortic aneurysm prevalence among men older than 65 years of age has been reported to be as high as
8% in Western countries. A 75-year-old man presented to his general practitioner for evaluation of vague abdominal pain. His medical history was significant for hypertension and an episode of left eye retinal vein occlusion that occurred 15 years before and completely recovered with medical treatment. Clinical examination revealed a large, non-tender, pulsatile mass in the epigastric region. The patient underwent open surgical repair of the abdominal aortic aneurysm the following day (Panel B) with aorto-bifemoral reconstruction using a 16 × 8-mm expanded polytetrafluoroethylene (ePTFE) bifurcated graft. Recovery was uneventful and he was discharged from hospital on postoperative day 12.Open surgical repair is often the only viable treatment because aneurysm
size implicates an adverse neck anatomy that makes these AAAs not suitable for endovascular aneurysm repair
Psammoecus simoni Grouvelle 1892
No full textPsammoecus simoni Grouvelle, 1892 (Fig. 11) Psammoecus simonis Grouvelle, 1892: 287. Psammoecus simoni – Grouvelle 1908c: 476.— Pal 1985. Material examined Lectotype ♂, by present designation: ‘ Antipolo | E. Simon’, ‘TYPE’ [red label], ‘MUSEUM PARIS | 1917 | Coll. GROUVELLE’ [yellow label], ‘ Psammoecus | Simoni | ty. A. Grouv’ [Grouvelle’s hand] (MNHN). Paralectotype 1 spm with identical data as lectotype (MNHN). Other material 5 spms ‘COLL: MUS. CONGO | Madagascar: Maroansetra | (à la lumière) II/ IV-1950 | J. Vadon’ (MRAC). 1spm ‘COLL. MUS. TERVUREN | N.E. Madagascar: | Ambodivoangy 1959 | J. Vadon’ (MRAC). Differential diagnosis Ps. simoni differs by its short oval habitus and the short, stout parameres that are fused with the basal piece from all other African Psammoecus. The wide-based pronotal teeth resemble Ps. luchti sp. nov., it differs by the elytral striae being considerably wider than interstices, elytra being shorter, darkened basis of elytra, parameres short, stout and fused with basal piece. Redescription BODY. Oval, total length 2.13-3.00 mm (Fig. 11A). Surface yellowish-brown, sometimes reddish-brown, elytra with brown or blackish-brown maculae: humeral swelling, a transverse band in the middle of the elytra, the elytral suture along the posterior two thirds and the elytral apex are dark. Base of antennae yellowish or reddish brown, 6 th to 10 th antennomere darkened, 11 th antennomere yellowish-white, some specimens with light apex of 10 th antennomere. HEAD. Broad, temples narrowed immediately behind eyes; width 0.64-0.71 mm, length 0.33-0.44 mm, 1.67-1.73 times as wide as long. Eyes protuberant, rounded, 0.17-0.20 mm long, distance of inner margins 0.38-0.45 mm. Puncturation on vertex coarse, density of punctures variable, pubescence composed of long, semierect setae, directed anteriorly; microsculpture absent. Longitudinal impressions on vertex very shallow, attaining the middle of the eyes, sometimes shorter. Antennae as in Fig. 11B, 1.17-1.40 mm long, stout, antennomere proportions of lectotype as follows: 2.9: 1.3: 1.8: 1.5: 1.8: 1.6: 1.4: 1.0:1.2: 1.4: 2.8. PRONOTUM. Broad; width 0.62-0.74 mm, length 0.48-0.56 mm, 1.22-1.35 times as wide as long. Surface smooth, without impressions. Anterior angles with distinct groups of small teeth; lateral margins with four distinct teeth; tooth I very small, tooth II a little larger, teeth III and IV largest. Posterior group of teeth consisting of a larger anterior tooth and a very small, almost obtuse posterior tooth. Puncturation coarser than on vertex, punctures sometimes adjoining. Pubescence as on vertex; microsculpture absent. ELYTRA. Oval, short, length 1.35-1.70 mm, combined width 1.00- 1.23 mm, 1.27-1.43 times as long as their combined width. Rows of punctures on disc wider than interstices. Pubescence consists of long, semierect setae. Microsculpture absent. PARAMERES. Short, stout, fused with basal piece; with distinct pattern of three large setae (Fig. 11 C). Remarks In his original description, Grouvelle (1892) spells the name ‘simonis’. However, on the labels that Grouvelle added to the syntypes as well as in a later paper (Grouvelle, 1908c), he spells the name ‘simoni’. Pal (1985) also uses the latter spelling. Hence the present author considers ‘simonis’ to be a misprint and proposes to spell the name in accordance with Grouvelle (1908c) and Pal (1985).Published as part of Karner, Michael, 2012, A revision of African Psammoecus (Coleoptera, Silvanidae) and descriptions of two new species from the collection of the Musée royal de l'Afrique centrale, pp. 1-31 in European Journal of Taxonomy 17 on pages 24-26, DOI: 10.5852/ejt.2012.17, http://zenodo.org/record/385784
Construyendo la ópera nacional: A Marília de Itamaracá de L. V. De-Simoni
No full textLuiz Vicente De Simoni (1782-1881) was an Italian physician who went to Rio de Janeiro in 1817, and was constantly involved in the musical and theatrical scene of the city. He is the author of Marília de Itamaracá (1854, music by Adolpho Maersch), considered by some authors as the first “Brazilian” opera. The subject is historical and narrates some episodes of the 17th century war against the Dutch. One of his main concerns was the use of Brazilian and Portuguese themes in operas, in order to invent something “national”. As part of a broader movement, the idea was to explore Brazilian people, landscape and traditions as the main subject for operas that should be sung in Portuguese. The movement was related to a broader political project sponsored by the government and the Emperor, aimed at the revision of Brazilian history and the construction of a new cultural identity for the country. The purpose of this paper is to examine some aspects of the libretto of Marília de Itamaracá and the ideas discussed in its preface, showing the contradictions and tensions involved in the creation of a “national” identity through operas
Advances in Modeling of Noisy Quantum Computers: Spin Qubits in Semiconductor Quantum Dots
No full textThe new quantum era is expected to have an unprecedented social impact, enabling the research of tomorrow in several pivotal fields. These perspectives require a physical system able to encode, process and store for a sufficiently long amount of time the quantum information. However, the optimal engineering of currently available quantum computers, which are small and flawed by several non-ideal phenomena, requires an efficacious methodology for exploring the design space. Hence, there is an unmet need for the development of reliable hardware-aware simulation infrastructures able to efficiently emulate the behaviour of quantum hardware that commits to looking for innovative systematic ways, with a bottom-up approach starting from the physical level, moving to the device level and up to the system level. This article discusses the development of a classical simulation infrastructure for semiconductor quantum-dot quantum computation based on compact models, where each device is described in terms of the main physical parameters affecting its performance in a sufficiently easy way from a computational point of view for providing accurate results without involving sophisticated physical simulators, thus reducing the requirements on CPU and memory. The effectiveness of the involved approximations is tested on a benchmark of quantum circuits - in the expected operating ranges of quantum hardware - by comparing the corresponding outcomes with those obtained via numeric integration of the Schrödinger equation. The achieved results give evidence that this work is a step forward towards the definition of a classical simulator of quantum computers.QCD/Scappucci La
Coupling versus uncoupling in soil consolidation
No full textCoupling and uncoupling between the equilibrium and mass balance equations in soil consolidation problems is investigated in detail. A procedure for judging the strength of coupling is indicated. In the applications, particular emphasis is given to subsidence problems where the coupled nature of the problem is still sometimes questioned. It is shown that even in the case of a single pumped aquifer most situations are coupled. -Author
Restenosis: a challenge for vascular surgeon.
No full textFrom the beginning of the cardiovascular surgery to the endovascular era restenosis represents the main problem of several spreading vascular disciplines. It can be considered as an excessive wound healing reaction of target vessel of revascularization procedures, that leads to a new narrowing of the vascular lumen. Restenosis still represents the main limiting factor of the long-term success of revascularization procedures. Prevention and strict follow-up are well established techniques in order to reduce restenosis rate and clinical impact of this condition. New drugs as cilostazol have been proven beneficial for patients with de novo lesions of peripheral arteries and cilostazol seems to avoid restenosis process in the majority of patients
On Safety Assessment and Base Isolation of Heavy Non-structural Monolithic Objects
No full textAbstractUnder seismic actions heavy non-structural objects, which are usually placed at the top of existing constructions, may constitute a danger to human lives and a considerable loss for world heritage. In this contribution, safety assessment of non-structural monolithic objects is discussed through the illustration of a case study, which concerns seismic protection of eleven ancient marble decorative pinnacles placed at the top of a three-arched masonry city gate in Ferrara (ITALY). A method for assessing the safety of the underlying masonry structure under the action of seismic excitations is outlined and the amplification of the ground motions due to the presence of such structure is evaluated
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