1,929 research outputs found
Isolario Venezia Sylva: un ragionamento collettivo
No full textCatalogo della tappa pescarese della mostra "Isolario Sylva" a cura di Sara Marini. Guest curator Alessandra Gabriele, Alberto Ulisse.
Scrive Sara Marini nel catalogo: "nel 2021, nell’ambito della ricerca nazionale Prin “Sylva”, ha preso corpo l’esercizio “Isolario Venezia Sylva” impostato su un confronto con le isole minori di Venezia per inseguire la nozione di selva e il suo rimandare alla instabilità, alla fragilità.
Alessandra La Rosa, La solidarietà come impresa pratica e teorica nella Francia della Terza Repubblica. L’apporto di Léon Duguit
No full textL’articolo di Alessandra La Rosa, depositato nell’Archivio Marini, ricostruisce il contributo del giurista Léon Duguit al dibattito che a cavallo tra XIX e XX secolo si sviluppò in Francia sul tema del rapporto tra società e stato. Il contesto storico è quello della terza repubblica, la questione di fondo il tentativo di legittimare il superamento [...
Letter to the Editor Regarding "Coronavirus Disease 2019 (COVID-19) and Neurosurgery: Literature and Neurosurgical Societies Recommendations Update"
No full textLetter to the Editor Regarding “Coronavirus Disease 2019
(COVID-19) and Neurosurgery: Literature and
Neurosurgical Societies Recommendations Update”
LETTER:
We read with great interest the article by Germanò et al,1
“COVID-19 and Neurosurgery; Literature and Neurosurgical
Societies Recommendations Update.” This paper provides a
relevant insight into the management of neuro-oncologic
patients during the COVID-19 pandemic, which has fast spread
worldwide and critically impacted the health care system. Italy
has been one of the most affected countries, witnessing dramatic
revolutions in routine practice.1-9 In such intense atmosphere,
neurosurgical departments are balancing between the urgent
and emergency cases, public-opinion concerns about transmission, and safety of the staff and patients.1-8
Regarding neurooncologic patients, as already reported by Zoia
et al,2 a priority criteria were established in order to stratify the
urgency of the cases: Class Aþþ represents patients who
require immediate treatments, with intracranial or spinal
oncologic pathology (rapidly evolving intracranial hypertension
with deteriorating state of consciousness, acute hydrocephalus,
spinal cord compression with rapid tetraparesis or paraparesis);
Class Aþ comprises patients who require treatment within a
maximum of 7e10 days, with intracranial tumors with mass
effect or with progressive neurologic deficit, without deterioration
of consciousness; and patients requiring treatment within a
month, namely Class A, with neurologic alteration or suspected
malignant lesion related to oncologic pathology.
We report a survey conducted by the neurosurgical team of the
Emergency Regional Hospital of Ancona (Italy), which serves
approximately 1.5 million inhabitants. During the past 3 months,
from February to April 2020, despite the halving of elective cases
in the weekly schedule, due to the redistribution of staff, the
number of oncologic patients who underwent surgical treatment
in our department was approximately analogous to the same time
period in 2019 (FebruaryApril, 49 patients in 2020 and 45 patients in 2019). Nonetheless, the amount of urgent or emergency
cases, accessing from emergency room, substantially rocketed,
reaching 57.1% compared with 31.1% in 2019, as reported in
Table 1. Interestingly, patients with spinal lesions were the most
affected, recording 76.9% with emergency department access (10
out of 13 patients), while the same feature in 2019 was slightly
more than 45% (5 out of 11 patients). As highlighted in Table 1,
the most common symptom was a progressive paraparesis and
all patients reported a previous history of neglected upper or
low back pain. These data, in our survey, were related to a
public health concern, in the patient’s point of view, about
visiting hospitals during the COVID-19 crisis, especially for not
apparently alarming symptoms, usually related to degenerative
spine pathologies such as back pain. In addition, the temporary
difficult access to radiologic examinations may have also
influenced the postponement in diagnosis. This resulted in progression of neurologic symptoms, without an early neurosurgical
evaluation, until the onset of acute deficit, which actually led to
emergency department access.
The same patient’s attitude, even if with minor impact, was
registered in those affected by brain lesions, in which the
percentage of patients with acute onset, and subsequent via
emergency room evaluation, dramatically increased in the past 3
months compared with 2019. As a matter of fact, the most
common symptoms were consciousness alteration and seizures; in
our survey approximately 10.7% of acute-onset patients reported to
have previously refused surgical treatment, in the weeks before,
correlated to concerns about hospitalization during the coronavirus emergency. Even if it is widely known that time is essential for
clinical and neurologic outcomes, our survey did not have
sufficient follow-up to properly compare the outcomes between
the 2 time periods analyzed, so further evaluations would be
indispensable to appropriately investigate this aspect.
In conclusion, during the COVID-19 pandemic the neurosurgical
urgent and emergency onset of neurooncologic cases increased,
in comparison with 2019. Our survey highlighted how this trend is
Table 1. Neuro-oncologic Patients’ Access, Comparing the
COVID-19 Time Period and 2019
Characteristics
FebruaryLApril
2020
FebruaryLApril
2019
Total number of neurooncologic
cases
49 45
Ratio emergency/elective total
cases
28/49 (57.1%) 14/45 (31.1%)
Ratio emergency/elective cases of
spinal lesions
10/13 (76.9%) 5/11 (45.1%)
Ratio emergency/elective cases of
cranial lesions
18/36 (50%) 9/34 (26.5%)
Acute presenting symptoms of
spinal lesions
10 5
Paraparesis or tetraparesis 5/10 (50%) 3/5 (60%)
Sphincteric disturbance 2/10 (20%) 1/5 (20%)
Combination 3/10 (30%) 1/5 (20%)
Acute presenting symptoms of
cranial lesions
18 9
Acute hydrocephalus 2/18 (11.1%) 1/9 (11.1%)
Seizures 12/18 (66.6%) 2/9 (22.2%)
Hemiparesis 7/18 (38.8%) 5/9 (55.5%)
Consciousness deterioration 10/18 (55.5%) 3/9 (33.3%)
Cranial nerve palsy 7/18 (38.8%) 1/9 (11.1%)
Patients who refused
hospitalization and who had further
emergency access
3/28 (10.7%) None
Patients who underestimated their
symptoms
20/28 (71.4%) 1/14 (7.1%)
Patients who had difficult access to
radiologic examinations
3/28 (10.7%) None
Patients who refused
hospitalization due to infection risk
10/28 (35.7%) None
WORLD NEUROSURGERY -: ---, MONTH 2020 www.journals.elsevier.com/world-neurosurgery 1
Letter to the Editor
minorly related to a combination of difficulty accessing radiologic
examinations and mostly to patients’ concerns about hospitalization. The consequent apprehension should be restoring the
public health judgement in order to rebalance this trend and
subsequently improve the clinical outcome of patients. A
reasonable response in this contest can be the intensification
of telemedicine clinic visits, as well as ameliorating the
clinic scheduling safety, concomitantly to the mass media
impact on public health opinion, in order to reestablish confidence in the health care system, in such an intense atmosphere of
fear.
Alessandra Marini, Maurizio Iacoangeli, Mauro Dobran
Clinic of Neurosurgery, Università Politecnica delle Marche, Azienda Ospedali Riuniti, and
Department of Neurosurgery, Università Politecnica delle Marche, Ospedali Riuniti, Ancona,
Italy
To whom correspondence should be addressed: Alessandra Marini, M.D.
[E-mail: [email protected]]
Conflict of interest statement: The authors declare that the article content was composed in
the absence of any commercial or financial relationships that could be construed as a potential
conflict of interest.
https://doi.org/10.1016/j.wneu.2020.05.160.
REFERENCES
1. Germanò A, Raffa G, Angileri FF, Cardali SM, Tomasello F. Coronavirus disease
2019 (COVID-19) and neurosurgery: literature and neurosurgical societies
recommendations update [e-pub ahead of print]. World Neurosurg. https://doi.org/
10.1016/j.wneu.2020.04.181, accessed April 1, 2020.
2. Zoia C, Bongetta D, Veiceschi P, et al. Neurosurgery during the COVID-19
pandemic: update from Lombardy, northern Italy [e-pub ahead of print]. Acta
Neurochir. https://doi.org/10.1007/s00701-020-04305-w, accessed March 28, 2020.
3. Desforges M, Le Coupanec A, Stodola JK, Meessen-Pinard M, Talbot PJ. Human
coronaviruses: viral and cellular factors involved in neuroinvasiveness and
neuropathogenesis. Virus Res. 2014;194:145-158.
4. Desforges M, Le Coupanec A, Brison É, Meessen-Pinard M, Talbot PJ. Neuroinvasive and neurotropic human respiratory coronaviruses: potential neurovirulent
agents in humans. In: Adhikari R, Thapa S, eds. Infectious Diseases and Nanomedicine
I. New Delhi, India: Springer; 2014:75-96. Advances in Experimental Medicine and
Biology; Vol 807.
5. Eichberg DG, Shah AH, Luther EM, et al. Letter: academic neurosurgery
department response to COVID-19 pandemic: the University of Miami/Jackson
Memorial Hospital Model [e-pub ahead of print]. Neurosurgery. https://doi.org/10.
1093/neuros/nyaa118, accessed April 11, 2020.
6. Zacharia BE, Eichberg DG, Ivan ME, et al. Letter: surgical management of brain
tumor patients in the COVID-19 era [e-pub ahead of print]. Neurosurgery. https://
doi.org/10.1093/neuros/nyaa162, accessed April 29, 2020.
7. Ramakrishna R, Zadeh G, Sheehan JP, Aghi MK. Inpatient and outpatient case
prioritization for patients with neuro-oncologic disease amid the COVID-19
pandemic: general guidance for neuro-oncology practitioners from the AANS/
CNS Tumor Section and Society for Neuro-Oncology [e-pub ahead of print]. J
Neurooncol. https://doi.org/10.1007/s11060-020-03488-7, accessed April 9, 2020.
8. Dobran M, Paracino R, Iacoangeli M. Letter to the editor by Dobran Mauro,
Paracino Riccardo, and Iacoangeli Maurizio regarding “Neurosurgery during the
COVID-19 pandemic: update from Lombardy, northern Italy.” Zoia C, Bongetta D,
Veiceschi P, Cenzato M, Di Meco F, Locatelli D, Boeris D, Fontanella MM. Acta
Neurochir (Wien). 2020 Mar 28. doi: 10.1007/s00701-020-04305-w. Acta Neurochir.
2020;162:1223-1224.
9. Dobran M, Marini A, Splavski B, et al. Surgical treatment and predictive factors
for atypical meningiomas: a multicentric experience [e-pub ahead of print]. World
Neurosurg. https://doi.org/10.1016/j.wneu.2020.03.201, accessed April 1, 2020.
2 www.SCIENCEDIRECT.com -: ---, MONTH 2020 WO
Valutare la comprensione lessicale in età prescolare: Un confronto tra la BVL_4-12 e il PPVT-R
No full textl presente lavoro di ricerca mira a valutare l’efficacia della prova di Comprensione Lessicale in Età Prescolare della Batteria per la Valutazione del Linguaggio in Bambini dai 4 ai 12 anni (BVL_4-12; Marini et al., 2015) confrontando la prestazione di un gruppo di bambini a questo test con quella ottenuta somministrando una prova, il Peabody Picture Vocabulary Test – Revised (PPVT-R; Dunn & Dunn, 1981, versione italiana a cura di Stella, Pizzoli & Tressoldi, 2001) per bambini dai 3 ai 12 anni di età, di consolidato uso nella pratica clinica. La differenza più evidente tra i due test risiede nella maggiore rapidità di somministrazione del test della BVL_4-12 e nella sua maggiore semplicità di scoring. Per questo studio sono stati reclutati 20 bambini frequentanti il primo anno della scuola dell’infanzia. Di questi, 15 bambini erano caratterizzati da uno sviluppo tipico del linguaggio, mentre i rimanenti 5 erano sottoposti a trattamento logopedico. I risultati di analisi quantitative e qualitative confermano che i due test forniscono informazioni equivalenti in bambini in età prescolare
Problemi di stabilità del Palazzo della Loggia di Brescia
No full textDottorato in Progetto e conservazione delle strutture, XIII° ciclo. Università degli Studi di Trieste, Università degli Studi di Brescia, Università degli Studi di Padova, Università degli Studi di Trento, Istituto Universitario di Architettura di Venezia (IUAV)
Numerical study on the seismic response of a post-WWII reinforced concrete building strengthened with concentric bracings
No full textIl lavoro presenta un progetto di rinforzo anti-sismico di un edificio esistente in calcestruzzo armato, progettato e realizzato negli anni 70’ nell’Italia settentrionale per resistere ai soli carichi verticali. L’edificio, rappresentativo di una tipologia molto diffusa nel Secondo Dopoguerra, è stato rinforzato con controventi concentrici X realizzati con piatti e posti all’interno del telaio perimetrale in CA. Analisi numeriche statiche e dinamiche non lineari agli elementi finti hanno permesso di valutare le prestazioni dell’edificio rinforzato, mostrando l’efficacia del sistema proposto nel soddisfare le richieste di spostamento di accelerogrammi naturali opportunamente scalati per il sito di riferimento posto in una zona di moderata intensità sismica.The paper presents the seismic-retrofit of a reference existing reinforced concrete building (RC) designed for gravity loads only and built in Northern Italy after World War II. Concentric Xbracings realized with steel plates are placed within the thickness of the external exiting RC frame to enhance the lateral strength and resistance of the building. The numerical results of non-linear push over and dynamic numerical analysis show the capability of the proposed solution to withstand the displacement demand of scaled natural accelerograms of a moderate seismic zone, with a lateral drift lower than 0.5% uniformly distributed over the building height
Coperture scatolari antisismiche
No full textA wooden roof strengthening technique aimed at transforming the roof pitches into anti-seismic shear resisting diaphragms is presented in this paper. Shear diaphragms gather and transfer the seismic loads to the shear resisting walls. The roof box structure forms a sort of “cover” of the masonry building, which avoids the overturning of the walls undergoing out-of-plane loads, and which allows triggering a global box structure behavior. Plywood diaphragms are built on top of the existing structures without significantly modifying the roof overall layout. The proposed strengthening technique is lightweight, mainly reversible, minimally impairing of the building integrity, and can be easily applied for the construction of anti-seismic wooden roofs in new buildings. A simplified design approach, which allows identifying the static role of each structural element, is presented in this paper. The approach can be adopted to validate the results obtained by means of advanced analytical methods, such as the finite element method. An analytical method for the estimate of the box structure displacements, as well as a short digression on the displacement control requirements are also illustrated. The diaphragm technique was recently applied for the anti-seismic retrofit of some monumental buildings in Italy. A case study, as well as the basic design criteria for applying this technique are presented in this paper
Analysis of reinforced concrete elements including shear effects
No full textThis paper deals with the analysis of reinforced concrete (RC) plane frames under monotonic and cyclic loading, including axial, bending, and shear effects. A force-based two-dimensional (2D) element based on the Timoshenko beam theory is introduced. The element formulation is general and yields the exact solution within the Timoshenko beam theory. A simple, nonlinear shear force-shear deformation law is used at the section level, together with a classical fiber section for the axial and bending effects. Shear deformations are thus uncoupled from axial and bending effects in the section stiffness, but shear and bending forces become coupled at the element level because equilibrium is enforced along the beam element. The element is validated through comparisons with experimental data on the shear performance of bridge columns. The seismic analysis of a viaduct that collapsed during the 1995 Kobe earthquake is presented
Wooden roof box structure for the anti-seismic strengthening of historic buildings
No full textA wooden roof strengthening technique aimed at transforming the roof pitches into anti-seismic shear-resisting diaphragms is presented in this article. Shear diaphragms gather and transfer the seismic loads to the shear-resisting walls. Diaphragms are built on top of the existing structures without significantly modifying the roof overall layout. The proposed strengthening technique is mainly reversible, minimally impairing the building integrity, and can be easily applied for the construction of anti-seismic wooden roofs in new buildings. A simplified design approach is presented, which allows identification of the static role of each element. An analytical method for the estimate of the box structure displacements, as well as a short digression on the displacement control requirements is also illustrated. The diaphragm technique was recently applied for the anti-seismic retrofit of some monumental buildings in Italy. A few case studies, as well as the basic design criteria for applying this technique are presented in this article
Problems of roofing of Early Minoan Tholos Tombs: the case of Kamilari A tholos tomb in the western Mesara plain
No full textThe Minoan tholos tomb (known also as the Mesara-type tomb) is a stone-built circular structure, widespread in the Mesara plain during the Early Minoan period, with some re-use during the Middle Minoan and Late Minoan periods. These circular structures, not covered by soil and therefore visible above ground, usually had a small entrance on the east side; annex rooms were at some point added mostly on the east side, together with other structures, such as rectangular funerary buildings, peribolos-walls, paved area, altars and platforms. Archaeological excavations have shown that Minoan tholos tombs have been found isolated or clustered in groups. They have been used over several centuries, for multiple burials, with primary and secondary burial practices attested within the main chambers and the external rooms.
Although a number of these circular buildings show traces of a corbelled roof, the argument of a stone vault has been discussed by various scholars in the past years often with open or not unanimous conclusions . Aside from the scholars who deny the existence of any vault, those who have argued for a vaulted roof have suggested several solutions (stones or lighter and perishable materials, such as mud bricks or wood), each of them supported by defined arguments, but each interpretation has always avoided the discussion of a possible true vault, since its first appearance must be placed in the Mycenaean period.
The present article will try to explore once again the question of the vaulted roof by examining the case of Kamilari A Minoan tholos tomb. Thanks to the good state of conservation of the walls, preserved at a significant height in some parts, the following analysis will try to verify whether the tholos tomb had a vaulted roof or not, and to argue about possible reasons for its collapse. The following analysis does not aim to extend the hypothesis of roof profiles to all Minoan tholos tombs, especially if one bears in mind the peculiar state of preservation of Kamilari tholos A as well as the fact that it was one of the latest buildings of this type to be constructed at the beginning of II millennium BC
- …
