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Article ; Online: Clinical and radiological outcomes of an uncemented metaphyseal short stem at minimum 10 years of follow-up: a prospective observational study.

Grappiolo, Guido / Gambaro, Francesco Manlio / Spera, Marco / Chiappetta, Katia / Morenghi, Emanuela / Loppini, Mattia

Archives of orthopaedic and trauma surgery

2023 Volume 144, Issue 1, Page(s) 425–431

Abstract: Purpose: There is growing interest around short stems as they provide a less invasive approach for total hip arthroplasty preserving bone stock for a possible revision surgery if required. The main purpose of this work was to assess the long-term ... ...

Abstract	Purpose: There is growing interest around short stems as they provide a less invasive approach for total hip arthroplasty preserving bone stock for a possible revision surgery if required. The main purpose of this work was to assess the long-term performance of an uncemented metaphyseal short stem in terms of survival rate and in addition its clinical and radiological outcomes. Materials and methods: From January to December 2010, we prospectively enrolled all consecutive patients undergoing primary total hip arthroplasty with an uncemented metaphyseal short stem in our institution with a minimum follow-up of 10 years. The radiographic features investigated were the varus-valgus stem orientation, areas of osteolysis and radiolucencies, stress shielding, and heterotopic calcifications. The clinical outcomes were measured using the HHS. Results: A total of 163 patients (172 hips) were finally included and the measured survival rate at 10 years was 99.6%. The average HHS increased from 55.0 preoperatively to 97.8 at the last follow-up (p < 0.0001). Among them, 137 patients (164 hips) were also available for radiographic assessment. Mild varus malalignment was observed in 40% of cases and remained stable in the serial X-rays and was not associated with step loosening. Mild stress shielding was observed around 13 stems (9%) and moderate only around 3 implants. Conclusion: In conclusion, the uncemented metaphyseal short stems showed excellent survival and clinical results at 10 years and at a radiographical level very low stress shielding was observed; moreover, besides the high frequency of varus alignment the implanted stems was not associated with revision surgery or with worse clinical outcomes.
MeSH term(s)	Humans ; Hip Prosthesis ; Treatment Outcome ; Prosthesis Design ; Arthroplasty, Replacement, Hip/methods ; Radiography ; Follow-Up Studies ; Reoperation
Language	English
Publishing date	2023-08-01
Publishing country	Germany
Document type	Observational Study ; Journal Article
ZDB-ID	80407-1
ISSN	1434-3916 ; 0003-9330 ; 0344-8444
ISSN (online)	1434-3916
ISSN	0003-9330 ; 0344-8444
DOI	10.1007/s00402-023-05012-8
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Article: Emotion dysregulation links pathological eating styles and psychopathological traits in bariatric surgery candidates.

Belloli, Arianna / Saccaro, Luigi F / Landi, Paola / Spera, Milena / Zappa, Marco Antonio / Dell'Osso, Bernardo / Rutigliano, Grazia

Frontiers in psychiatry

2024 Volume 15, Page(s) 1369720

Abstract: Objectives: Approximately one-third of bariatric surgery patients experience weight regain or suboptimal weight loss within five years post-surgery. Pathological eating styles and psychopathological traits (e.g., emotion dysregulation) are recognized as ...

Abstract	Objectives: Approximately one-third of bariatric surgery patients experience weight regain or suboptimal weight loss within five years post-surgery. Pathological eating styles and psychopathological traits (e.g., emotion dysregulation) are recognized as potential hindrances to sustain weight loss efforts and are implicated in obesity development. A comprehensive understanding of these variables and their interplays is still lacking, despite their potential significance in developing more effective clinical interventions for bariatric patients. We investigate the prevalence of and interactions between pathological eating styles and psychopathological traits in this population. Materials and methods: 110 bariatric surgery candidates were characterized using the Binge Eating Scale (BES), Hamilton Depression/Anxiety Scales (HAM-D/A), Barratt Impulsiveness Scale (BIS-11), Experiences in Close Relationships (ECR), Difficulties in Emotion Regulation Scale (DERS). We analyzed these variables with multiple logistic regression analyses and network analysis. Results: Patients with pathological eating styles showed more pronounced anxiety/depressive symptoms and emotion dysregulation. Network analysis revealed strong connections between BES and DERS, with DERS also displaying robust connections with HAM-A/D and ECR scales. DERS and attention impulsivity (BIS-11-A) emerged as the strongest nodes in the network. Discussion: Our findings demonstrate the mediating role of emotion dysregulation between pathological eating styles and psychopathological traits, supporting existing literature on the association between psychopathological traits, insecure attachment styles, and pathological eating behaviors. This research emphasizes the significance of emotion regulation in the complex network of variables contributing to obesity, and its potential impact on bariatric surgery outcomes. Interventions focusing on emotion regulation may thus lead to improved clinical outcomes for bariatric patients.
Language	English
Publishing date	2024-03-28
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2564218-2
ISSN	1664-0640
ISSN	1664-0640
DOI	10.3389/fpsyt.2024.1369720
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Article ; Online: Insight into the Charge Density Wave Gap from Contrast Inversion in Topographic STM Images.

Spera, M / Scarfato, A / Pásztor, Á / Giannini, E / Bowler, D R / Renner, Ch

Physical review letters

2020 Volume 125, Issue 26, Page(s) 267603

Abstract: Charge density waves (CDWs) are understood in great detail in one dimension, but they remain largely enigmatic in two-dimensional systems. In particular, numerous aspects of the associated energy gap and the formation mechanism are not fully understood. ... ...

Abstract	Charge density waves (CDWs) are understood in great detail in one dimension, but they remain largely enigmatic in two-dimensional systems. In particular, numerous aspects of the associated energy gap and the formation mechanism are not fully understood. Two long-standing riddles are the amplitude and position of the CDW gap with respect to the Fermi level (E_{F}) and the frequent absence of CDW contrast inversion (CI) between opposite bias scanning tunneling microscopy (STM) images. Here, we find compelling evidence that these two issues are intimately related. Combining density functional theory and STM to analyze the CDW pattern and modulation amplitude in 1T-TiSe_{2}, we find that CI takes place at an unexpected negative sample bias because the CDW gap opens away from E_{F}, deep inside the valence band. This bias becomes increasingly negative as the CDW gap shifts to higher binding energy with electron doping. This study shows the importance of CI in STM images to identify periodic modulations with a CDW and to gain valuable insight into the CDW gap, whose measurement is notoriously controversial.
Language	English
Publishing date	2020-10-23
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.125.267603
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Article ; Online: Statistics of TNO stereotest for the diagnosis of microesotropia in children.

Piantanida, Andrea C / Spera, Manuela / Nobili, Roberta / Gerosa, Giulia

European journal of ophthalmology

2018 Volume 28, Issue 3, Page(s) 259–263

Abstract: Purpose: To analyze statistically the real effectiveness of TNO stereotest for the diagnosis of microesotropia in young patients in daily practice.: Methods: We considered 312 patients whose age ranged from 3 to 18 years (mean age 7.5 years) ... ...

Abstract	Purpose: To analyze statistically the real effectiveness of TNO stereotest for the diagnosis of microesotropia in young patients in daily practice. Methods: We considered 312 patients whose age ranged from 3 to 18 years (mean age 7.5 years) suspected to be microesotropic. All underwent a full orthoptic and ophthalmologic examination. The TNO stereotest was presented at a distance of 40 cm with the patient wearing red-green glasses. The Paliaga 8-D base-in test was considered the gold standard diagnostic test to detect microesotropia. Results: The specificity of the TNO stereotest from the collected data was 98%, the sensitivity 94%, the positive predictive value 80%, the negative predictive value 99%, and the likelihood ratio 47. Conclusions: It is important to use the TNO stereotest in clinical daily practice to detect microesotropia, but considering some bias: the age of the young patients, the difficulties encountered in understanding some figures, and the presence of a stereoscopic status even in microtropic subjects.
MeSH term(s)	Adolescent ; Child ; Child, Preschool ; Depth Perception/physiology ; Esotropia/diagnosis ; Esotropia/physiopathology ; Eyeglasses ; False Positive Reactions ; Female ; Humans ; Male ; Orthoptics ; Predictive Value of Tests ; Sensitivity and Specificity ; Vision Tests/statistics & numerical data ; Vision, Binocular/physiology ; Visual Acuity/physiology
Language	English
Publishing date	2018-05
Publishing country	United States
Document type	Journal Article
ZDB-ID	1089461-5
ISSN	1724-6016 ; 1120-6721
ISSN (online)	1724-6016
ISSN	1120-6721
DOI	10.5301/ejo.5001064
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Article ; Online: Multiband charge density wave exposed in a transition metal dichalcogenide.

Pásztor, Árpád / Scarfato, Alessandro / Spera, Marcello / Flicker, Felix / Barreteau, Céline / Giannini, Enrico / Wezel, Jasper van / Renner, Christoph

Nature communications

2021 Volume 12, Issue 1, Page(s) 6037

Abstract: In the presence of multiple bands, well-known electronic instabilities may acquire new complexity. While multiband superconductivity is the subject of extensive studies, the possibility of multiband charge density waves (CDWs) has been largely ignored so ...

Abstract	In the presence of multiple bands, well-known electronic instabilities may acquire new complexity. While multiband superconductivity is the subject of extensive studies, the possibility of multiband charge density waves (CDWs) has been largely ignored so far. Here, combining energy dependent scanning tunnelling microscopy (STM) topography with a simple model of the charge modulations and a self-consistent calculation of the CDW gap, we find evidence for a multiband CDW in 2H-NbSe
Language	English
Publishing date	2021-10-15
Publishing country	England
Document type	Journal Article
ZDB-ID	2553671-0
ISSN	2041-1723 ; 2041-1723
ISSN (online)	2041-1723
ISSN	2041-1723
DOI	10.1038/s41467-021-25780-4
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Article ; Online: Stripe and Short Range Order in the Charge Density Wave of 1T-Cu_{x}TiSe_{2}.

Novello, A M / Spera, M / Scarfato, A / Ubaldini, A / Giannini, E / Bowler, D R / Renner, Ch

Physical review letters

2017 Volume 118, Issue 1, Page(s) 17002

Abstract: We study the impact of Cu intercalation on the charge density wave (CDW) in 1T-Cu_{x}TiSe_{2} by scanning tunneling microscopy and spectroscopy. Cu atoms, identified through density functional theory modeling, are found to intercalate randomly on the ... ...

Abstract	We study the impact of Cu intercalation on the charge density wave (CDW) in 1T-Cu_{x}TiSe_{2} by scanning tunneling microscopy and spectroscopy. Cu atoms, identified through density functional theory modeling, are found to intercalate randomly on the octahedral site in the van der Waals gap and to dope delocalized electrons near the Fermi level. While the CDW modulation period does not depend on Cu content, we observe the formation of charge stripe domains at low Cu content (x<0.02) and a breaking up of the commensurate order into 2×2 domains at higher Cu content. The latter shrink with increasing Cu concentration and tend to be phase shifted. These findings invalidate a proposed excitonic pairing as the primary CDW formation mechanism in this material.
Language	English
Publishing date	2017-01-06
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.118.017002
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Article ; Online: Accidentes por lepidópteros: Hylesia nigricans (Berg, 1875) o "mariposa negra".

Cabrerizo, Silvia / Spera, Marina / de Roodt, Adolfo

Archivos argentinos de pediatria

2014 Volume 112, Issue 2, Page(s) 179–182

Abstract: Lepidoptera (butterflies, caterpillars and moths) biologic features make possible the contact between different instars and humans. The moth Hylesia nigricans is responsible for epidemic outbreaks in our country. It is called erucism when the contact is ... ...

Title translation	Accidents due to Lepidoptera: Hylesia nigricans (Berg, 1875) or "mariposa negra".
Abstract	Lepidoptera (butterflies, caterpillars and moths) biologic features make possible the contact between different instars and humans. The moth Hylesia nigricans is responsible for epidemic outbreaks in our country. It is called erucism when the contact is with caterpillars and lepidopterism when the contact is with moths. We perform an update of these important medical lepidopters.
MeSH term(s)	Animals ; Dermatitis, Contact/diagnosis ; Dermatitis, Contact/parasitology ; Dermatitis, Contact/therapy ; Humans ; Moths
Language	Spanish
Publishing date	2014-04
Publishing country	Argentina
Document type	English Abstract ; Journal Article
ZDB-ID	424449-7
ISSN	1668-3501 ; 0325-0075 ; 0004-0487
ISSN (online)	1668-3501
ISSN	0325-0075 ; 0004-0487
DOI	10.1590/S0325-00752014000200018
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Article ; Online: Characterizing humans on Riemannian manifolds.

Tosato, Diego / Spera, Mauro / Cristani, Marco / Murino, Vittorio

IEEE transactions on pattern analysis and machine intelligence

2013 Volume 35, Issue 8, Page(s) 1972–1984

Abstract: In surveillance applications, head and body orientation of people is of primary importance for assessing many behavioral traits. Unfortunately, in this context people are often encoded by a few, noisy pixels so that their characterization is difficult. ... ...

Abstract	In surveillance applications, head and body orientation of people is of primary importance for assessing many behavioral traits. Unfortunately, in this context people are often encoded by a few, noisy pixels so that their characterization is difficult. We face this issue, proposing a computational framework which is based on an expressive descriptor, the covariance of features. Covariances have been employed for pedestrian detection purposes, actually a binary classification problem on Riemannian manifolds. In this paper, we show how to extend to the multiclassification case, presenting a novel descriptor, named weighted array of covariances, especially suited for dealing with tiny image representations. The extension requires a novel differential geometry approach in which covariances are projected on a unique tangent space where standard machine learning techniques can be applied. In particular, we adopt the Campbell-Baker-Hausdorff expansion as a means to approximate on the tangent space the genuine (geodesic) distances on the manifold in a very efficient way. We test our methodology on multiple benchmark datasets, and also propose new testing sets, getting convincing results in all the cases.
MeSH term(s)	Artificial Intelligence ; Humans ; Image Processing, Computer-Assisted/methods ; Pattern Recognition, Automated/methods
Language	English
Publishing date	2013-08
Publishing country	United States
Document type	Journal Article
ISSN	1939-3539
ISSN (online)	1939-3539
DOI	10.1109/TPAMI.2012.263
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Article: Ohmic Contacts on p-Type Al-Implanted 4H-SiC Layers after Different Post-Implantation Annealings.

Spera, Monia / Greco, Giuseppe / Corso, Domenico / Di Franco, Salvatore / Severino, Andrea / Messina, Angelo Alberto / Giannazzo, Filippo / Roccaforte, Fabrizio

Materials (Basel, Switzerland)

2019 Volume 12, Issue 21

Abstract: This paper reports on the electrical activation and Ohmic contact properties on p-type Al-implanted silicon carbide (4H-SiC). In particular, the contacts were formed on 4H-SiC-implanted layers, subjected to three different post-implantation annealing ... ...

Abstract	This paper reports on the electrical activation and Ohmic contact properties on p-type Al-implanted silicon carbide (4H-SiC). In particular, the contacts were formed on 4H-SiC-implanted layers, subjected to three different post-implantation annealing processes, at 1675 °C, 1175 °C, and 1825 °C. Under these post-implantation annealing conditions, the electrical activation of the Al dopant species increased from 39% to 56%. The Ti/Al/Ni contacts showed an Ohmic behavior after annealing at 950 °C. The specific contact resistance
Language	English
Publishing date	2019-10-23
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2487261-1
ISSN	1996-1944
ISSN	1996-1944
DOI	10.3390/ma12213468
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Book ; Online: Ni Schottky barrier on heavily doped phosphorous implanted 4H-SiC

Vivona, Marilena / Greco, Giuseppe / Spera, Monia / Fiorenza, Patrick / Giannazzo, Filippo / La Magna, Antonino / Roccaforte, Fabrizio

2021

Abstract: The electrical behavior of Ni Schottky barrier formed onto heavily doped (ND>1019 cm-3) n-type phosphorous implanted silicon carbide (4H-SiC) was investigated, with a focus on the current transport mechanisms in both forward and reverse bias. The forward ...

Abstract	The electrical behavior of Ni Schottky barrier formed onto heavily doped (ND>1019 cm-3) n-type phosphorous implanted silicon carbide (4H-SiC) was investigated, with a focus on the current transport mechanisms in both forward and reverse bias. The forward current-voltage characterization of Schottky diodes showed that the predominant current transport is a thermionic-field emission mechanism. On the other hand, the reverse bias characteristics could not be described by a unique mechanism. In fact, under moderate reverse bias, implantation-induced damage is responsible for the temperature increase of the leakage current, while a pure field emission mechanism is approached with bias increasing. The potential application of metal/4H-SiC contacts on heavily doped layers in real devices are discussed.
Keywords	Condensed Matter - Materials Science ; Physics - Applied Physics
Publishing date	2021-02-17
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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