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  1. Article ; Online: Crystallization kinetics of nanoconfined GeTe slabs in GeTe/TiTe[Formula: see text]-like superlattices for phase change memories.

    Acharya, Debdipto / Abou El Kheir, Omar / Campi, Davide / Bernasconi, Marco

    Scientific reports

    2024  Volume 14, Issue 1, Page(s) 3224

    Abstract: Superlattices made of alternating blocks of the phase change compound Sb[Formula: see text]Te[Formula: see text] and of TiTe[Formula: see text] confining layers have been recently proposed for applications in neuromorphic devices. The Sb[Formula: see ... ...

    Abstract Superlattices made of alternating blocks of the phase change compound Sb[Formula: see text]Te[Formula: see text] and of TiTe[Formula: see text] confining layers have been recently proposed for applications in neuromorphic devices. The Sb[Formula: see text]Te[Formula: see text]/TiTe[Formula: see text] heterostructure allows for a better control of multiple intermediate resistance states and for a lower drift with time of the electrical resistance of the amorphous phase. However, Sb[Formula: see text]Te[Formula: see text] suffers from a low data retention due to a low crystallization temperature T[Formula: see text]. Substituting Sb[Formula: see text]Te[Formula: see text] with a phase change compound with a higher T[Formula: see text], such as GeTe, seems an interesting option in this respect. Nanoconfinement might, however, alters the crystallization kinetics with respect to the bulk. In this work, we investigated the crystallization process of GeTe nanoconfined in geometries mimicking GeTe/TiTe[Formula: see text] superlattices by means of molecular dynamics simulations with a machine learning potential. The simulations reveal that nanoconfinement induces a mild reduction in the crystal growth velocities which would not hinder the application of GeTe/TiTe[Formula: see text] heterostructures in neuromorphic devices with superior data retention.
    Language English
    Publishing date 2024-02-08
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-024-53192-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: "Une certaine italianité prédomine dans notre service" : cinq questions à Mauro Bernasconi, co-directeur du service méditerranéen au centre de soins Erlenhof à Zurich

    Bernasconi, Mauro

    2019  , Issue 124, Page(s) 11

    Keywords Alter. ; Migration. ; Altenheimbewohner. ; Pflegepersonal. ; Biografie. ; Schweiz.
    Language French
    Document type Article
    Database bibnet.org

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  3. Article: «Bei uns herrscht eine gewisse ‹Italianità›» : mediterrane Abteilung im Pflegezentrum

    Bernasconi, Mauro

    spectra

    2019  , Issue 124, Page(s) 11

    Keywords Alter. ; Migration. ; Altenheimbewohner. ; Pflegepersonal. ; Biografie. ; Schweiz.
    Language German
    Document type Article
    Database bibnet.org

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  4. Article ; Online: Nodal tumor volume as a prognostic factor for oral squamous cell carcinoma-a systematic review.

    Bernasconi, Mischa / Bilic, Ante / Kauke-Navarro, Martin / Safi, Ali-Farid

    Frontiers in oral health

    2023  Volume 4, Page(s) 1229931

    Abstract: Oral squamous cell carcinoma (OSCC) is a complex disease with a high potential for lymph node metastasis and poor survival rates. Accurate nodal staging is crucial for prognostic assessment and treatment planning in OSCC. Recent research has suggested ... ...

    Abstract Oral squamous cell carcinoma (OSCC) is a complex disease with a high potential for lymph node metastasis and poor survival rates. Accurate nodal staging is crucial for prognostic assessment and treatment planning in OSCC. Recent research has suggested that nodal tumor volume (NTV) may be a more accurate indicator of nodal disease burden than traditional staging methods. However, the prognostic significance of NTV in OSCC remains unclear. This systematic review aims to evaluate the existing evidence on the relationship between NTV and prognosis in OSCC. A comprehensive search of electronic databases was conducted, and studies meeting inclusion criteria were critically appraised and synthesized. Our review identified 23 studies that investigated the prognostic significance of NTV in OSCC. The majority of studies reported that larger NTV was associated with poorer survival outcomes, although the strength of the association varied. The review also identified several areas for future research, including the standardization of NTV measurement and the integration of NTV into the broader landscape of OSCC management. In conclusion, our review suggests that NTV holds promise as a novel prognostic factor in OSCC, but more research is needed to fully elucidate its potential and inform clinical decision-making.
    Language English
    Publishing date 2023-08-16
    Publishing country Switzerland
    Document type Journal Article ; Review
    ISSN 2673-4842
    ISSN (online) 2673-4842
    DOI 10.3389/froh.2023.1229931
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Book ; Online: Bandits with Replenishable Knapsacks

    Bernasconi, Martino / Castiglioni, Matteo / Celli, Andrea / Fusco, Federico

    the Best of both Worlds

    2023  

    Abstract: The bandits with knapsack (BwK) framework models online decision-making problems in which an agent makes a sequence of decisions subject to resource consumption constraints. The traditional model assumes that each action consumes a non-negative amount of ...

    Abstract The bandits with knapsack (BwK) framework models online decision-making problems in which an agent makes a sequence of decisions subject to resource consumption constraints. The traditional model assumes that each action consumes a non-negative amount of resources and the process ends when the initial budgets are fully depleted. We study a natural generalization of the BwK framework which allows non-monotonic resource utilization, i.e., resources can be replenished by a positive amount. We propose a best-of-both-worlds primal-dual template that can handle any online learning problem with replenishment for which a suitable primal regret minimizer exists. In particular, we provide the first positive results for the case of adversarial inputs by showing that our framework guarantees a constant competitive ratio $\alpha$ when $B=\Omega(T)$ or when the possible per-round replenishment is a positive constant. Moreover, under a stochastic input model, our algorithm yields an instance-independent $\tilde{O}(T^{1/2})$ regret bound which complements existing instance-dependent bounds for the same setting. Finally, we provide applications of our framework to some economic problems of practical relevance.
    Keywords Computer Science - Machine Learning ; Statistics - Machine Learning
    Subject code 006
    Publishing date 2023-06-14
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Book ; Online: No-Regret Learning in Bilateral Trade via Global Budget Balance

    Bernasconi, Martino / Castiglioni, Matteo / Celli, Andrea / Fusco, Federico

    2023  

    Abstract: Bilateral trade revolves around the challenge of facilitating transactions between two strategic agents -- a seller and a buyer -- both of whom have a private valuations for the item. We study the online version of the problem, in which at each time step ...

    Abstract Bilateral trade revolves around the challenge of facilitating transactions between two strategic agents -- a seller and a buyer -- both of whom have a private valuations for the item. We study the online version of the problem, in which at each time step a new seller and buyer arrive. The learner's task is to set a price for each agent, without any knowledge about their valuations. The sequence of sellers and buyers is chosen by an oblivious adversary. In this setting, known negative results rule out the possibility of designing algorithms with sublinear regret when the learner has to guarantee budget balance for each iteration. In this paper, we introduce the notion of global budget balance, which requires the agent to be budget balance only over the entire time horizon. By requiring global budget balance, we provide the first no-regret algorithms for bilateral trade with adversarial inputs under various feedback models. First, we show that in the full-feedback model the learner can guarantee $\tilde{O}(\sqrt{T})$ regret against the best fixed prices in hindsight, which is order-wise optimal. Then, in the case of partial feedback models, we provide an algorithm guaranteeing a $\tilde{O}(T^{3/4})$ regret upper bound with one-bit feedback, which we complement with a nearly-matching lower bound. Finally, we investigate how these results vary when measuring regret using an alternative benchmark.
    Keywords Computer Science - Computer Science and Game Theory ; Computer Science - Machine Learning
    Subject code 005
    Publishing date 2023-10-18
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Book ; Online: Persuading Farsighted Receivers in MDPs

    Bernasconi, Martino / Castiglioni, Matteo / Marchesi, Alberto / Mutti, Mirco

    the Power of Honesty

    2023  

    Abstract: Bayesian persuasion studies the problem faced by an informed sender who strategically discloses information to influence the behavior of an uninformed receiver. Recently, a growing attention has been devoted to settings where the sender and the receiver ... ...

    Abstract Bayesian persuasion studies the problem faced by an informed sender who strategically discloses information to influence the behavior of an uninformed receiver. Recently, a growing attention has been devoted to settings where the sender and the receiver interact sequentially, in which the receiver's decision-making problem is usually modeled as a Markov decision process (MDP). However, previous works focused on computing optimal information-revelation policies (a.k.a. signaling schemes) under the restrictive assumption that the receiver acts myopically, selecting actions to maximize the one-step utility and disregarding future rewards. This is justified by the fact that, when the receiver is farsighted and thus considers future rewards, finding an optimal Markovian signaling scheme is NP-hard. In this paper, we show that Markovian signaling schemes do not constitute the "right" class of policies. Indeed, differently from most of the MDPs settings, we prove that Markovian signaling schemes are not optimal, and general history-dependent signaling schemes should be considered. Moreover, we also show that history-dependent signaling schemes circumvent the negative complexity results affecting Markovian signaling schemes. Formally, we design an algorithm that computes an optimal and {\epsilon}-persuasive history-dependent signaling scheme in time polynomial in 1/{\epsilon} and in the instance size. The crucial challenge is that general history-dependent signaling schemes cannot be represented in polynomial space. Nevertheless, we introduce a convenient subclass of history-dependent signaling schemes, called promise-form, which are as powerful as general history-dependent ones and efficiently representable. Intuitively, promise-form signaling schemes compactly encode histories in the form of honest promises on future receiver's rewards.
    Keywords Computer Science - Computer Science and Game Theory
    Subject code 518
    Publishing date 2023-06-21
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Constructed wetlands for the treatment of combined sewer overflow upstream of centralized wastewater treatment plants

    Masi, F. / Sarti, C. / Cincinelli, A. / Bresciani, R. / Martinuzzi, N. / Bernasconi, M. / Rizzo, A.

    Ecological Engineering. 2023 Aug., v. 193 p.107008-

    2023  

    Abstract: Combined sewer overflows (CSOs) constitute nowadays a major environmental concern, representing one of the main untreated sources of pollution for receiving water bodies. Additional, in recent years, the frequency and intensity of CSOs have increased due ...

    Abstract Combined sewer overflows (CSOs) constitute nowadays a major environmental concern, representing one of the main untreated sources of pollution for receiving water bodies. Additional, in recent years, the frequency and intensity of CSOs have increased due to the growing urbanisation and climate change. Although there is no single effective strategy, one of the most promising approaches for the control and treatment of CSOs can be found in nature-based solutions (NBS), such as constructed wetlands (CWs). Despite the demonstrated potential of CWs to treat CSOs, the only data reported in the literature refer to CSO-CW systems located along the sewerage network. This research represents, to the best of our knowledge, the first monitoring of a full-scale CSO-CW designed to treat the combined sewer overflow upstream of the WWTP located in Carimate, in the province of Como (Italy). The system is a multistage CW, composed by a 1st vertical subsurface flow (VF) stage (total area of 8500 m²) and a 2nd free water surface (FWS) stage (total area of 4500 m²). The observed removal rates during the 3 years monitoring campaign (mean values equal to 83.2%, 64.6%, 63.8% for COD, TP, and N-NH₄⁺ respectively) confirmed the treatment efficiency of CW system for all the investigated parameters, consistent with literature data for CSO-CWs in line with the sewerage network, despite its large scale and different hydraulic characteristics. Furthermore, the system also provides additional ecosystem services such as flood mitigation (average CSO interception of 82%), enhancement of biodiversity and a low operational and maintenance cost.
    Keywords biodiversity ; climate change ; ecosystems ; flood control ; pollution ; subsurface flow ; urbanization ; Italy ; Combined sewer overflow ; Wastewater treatment plant ; Nature-based solution ; Constructed Wetland ; Treatment Wetland ; Ecosystem service ; CSO ; WWTP ; CW ; NBS
    Language English
    Dates of publication 2023-08
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ZDB-ID 1127407-4
    ISSN 0925-8574
    ISSN 0925-8574
    DOI 10.1016/j.ecoleng.2023.107008
    Database NAL-Catalogue (AGRICOLA)

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  9. Article ; Online: Recurrent pituitary apoplexy in pregnancy.

    Geissler, Franziska / Hoesli, Irene / Todesco Bernasconi, Monya

    BMJ case reports

    2021  Volume 14, Issue 8

    Abstract: Pituitary apoplexy is caused by haemorrhage or infarction of the pituitary gland. Presenting signs and symptoms often include severe headache, visual disturbance, ophthalmoplegia, altered consciousness and impaired pituitary function. The management of ... ...

    Abstract Pituitary apoplexy is caused by haemorrhage or infarction of the pituitary gland. Presenting signs and symptoms often include severe headache, visual disturbance, ophthalmoplegia, altered consciousness and impaired pituitary function. The management of pituitary apoplexy has very rarely been described during pregnancy and there is no existing data for further pregnancies of affected women. We present a case of a woman with a recurrent pituitary apoplexy due to haemorrhages in a pituitary adenoma in her third and fourth pregnancies. In both pregnancies, the pituitary apoplexy was managed conservatively, but due to therapy-resistant headaches, a preterm delivery was implemented.
    MeSH term(s) Adenoma/diagnosis ; Adenoma/diagnostic imaging ; Female ; Headache/etiology ; Humans ; Magnetic Resonance Imaging ; Pituitary Apoplexy/diagnosis ; Pituitary Gland ; Pituitary Neoplasms/diagnosis ; Pituitary Neoplasms/diagnostic imaging ; Pregnancy
    Language English
    Publishing date 2021-08-11
    Publishing country England
    Document type Case Reports ; Journal Article
    ISSN 1757-790X
    ISSN (online) 1757-790X
    DOI 10.1136/bcr-2021-242353
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Mechanism of amorphous phase stabilization in ultrathin films of monoatomic phase change material.

    Dragoni, Daniele / Behler, Jörg / Bernasconi, Marco

    Nanoscale

    2021  Volume 13, Issue 38, Page(s) 16146–16155

    Abstract: Elemental antimony has been recently proposed as a promising material for phase change memories with improved performances with respect to the most used ternary chalcogenide alloys. The compositional simplification prevents reliability problems due to ... ...

    Abstract Elemental antimony has been recently proposed as a promising material for phase change memories with improved performances with respect to the most used ternary chalcogenide alloys. The compositional simplification prevents reliability problems due to demixing of the alloy during memory operation. This is made possible by the dramatic stabilization of the amorphous phase once Sb is confined in an ultrathin film 3-5 nm thick. In this work, we shed light on the microscopic origin of this effect by means of large scale molecular dynamics simulations based on an interatomic potential generated with a machine learning technique. The simulations suggest that the dramatic reduction of the crystal growth velocity in the film with respect to the bulk is due to the effect of nanoconfinement on the fast
    Language English
    Publishing date 2021-10-08
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515664-0
    ISSN 2040-3372 ; 2040-3364
    ISSN (online) 2040-3372
    ISSN 2040-3364
    DOI 10.1039/d1nr03432d
    Database MEDical Literature Analysis and Retrieval System OnLINE

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