781 results on '"P. Bosshard"'
Search Results
2. Results of a phase II single arm clinical trial assessing efficacy, safety and tolerability of the recombinant Bacillus Calmette Guérin (BCG) VPM1002BC in patients with BCG failure - SAKK 06/14
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C.A. Rentsch, G. Thalmann, I. Lucca, M. Kwiatkowski, G. Wirth, R. Strebel, D. Engeler, A. Pedrazzini, C. Hüttenbrink, W. Schultze-Seemann, L. Bubendorf, A. Wicki, B. Roth, P. Bosshard, H. Püschel, D. Boll, L. Hefermehl, F. Roghmann, M. Gierth, S. Schäfer, and S. Hayoz
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Diseases of the genitourinary system. Urology ,RC870-923 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Published
- 2020
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3. Formal Verification of the Sumcheck Protocol
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Bosshard, Azucena Garvía, Bootle, Jonathan, and Sprenger, Christoph
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Computer Science - Cryptography and Security ,Computer Science - Logic in Computer Science - Abstract
The sumcheck protocol, introduced in 1992, is an interactive proof which is a key component of many probabilistic proof systems in computational complexity theory and cryptography, some of which have been deployed. However, none of these proof systems based on the sumcheck protocol enjoy a formally-verified security analysis. In this paper, we make progress in this direction by providing a formally verified security analysis of the sumcheck protocol using the interactive theorem prover Isabelle/HOL. We follow a general and modular approach. First, we give a general formalization of public-coin interactive proofs. We then define a generalized sumcheck protocol for which we axiomatize the underlying mathematical structure and we establish its soundness and completeness. Finally, we prove that these axioms hold for multivariate polynomials, the original setting of the sumcheck protocol. Our modular analysis facilitates formal verification of sumcheck instances based on different mathematical structures with little effort, by simply proving that these structures satisfy the axioms. Moreover, the analysis supports the development and formal verification of future cryptographic protocols using the sumcheck protocol as a building block., Comment: Full version of CSF 2024 paper
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- 2024
4. Computing Perfect Bayesian Equilibria in Sequential Auctions
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Thoma, Vinzenz, Bosshard, Vitor, and Seuken, Sven
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Computer Science - Computer Science and Game Theory - Abstract
We present a best-response based algorithm for computing verifiable $\varepsilon$-perfect Bayesian equilibria for sequential auctions with combinatorial bidding spaces and incomplete information. Previous work has focused only on computing Bayes-Nash equilibria for static single-round auctions, which our work captures as a special case. Additionally, we prove an upper bound $\varepsilon$ on the utility loss of our approximate equilibria and present an algorithm to efficiently compute $\varepsilon$ based on the immediate loss at each subgame. We evaluate the performance of our algorithm by reproducing known results from several auctions previously introduced in the literature, including a model of combinatorial split-award auctions used in procurement., Comment: 12 pages, 8 figures
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- 2023
5. External validation of the MiGUTS nomogram for the prediction of bleeding control intervention after renal trauma
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Schmidli, Tobias Simon, Sigg, Silvan, Keihani, Sorena, Bosshard, Lars, Prummer, Michael, Nowag, Anna S., Birzele, Jan, Zhang, Chong, Myers, Jeremy B., and Strebel, Räto T.
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- 2024
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6. Representation of genomic intratumor heterogeneity in multi-region non-small cell lung cancer patient-derived xenograft models
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Hynds, Robert E., Huebner, Ariana, Pearce, David R., Hill, Mark S., Akarca, Ayse U., Moore, David A., Ward, Sophia, Gowers, Kate H. C., Karasaki, Takahiro, Al Bakir, Maise, Wilson, Gareth A., Pich, Oriol, Martínez-Ruiz, Carlos, Hossain, A. S. Md Mukarram, Pearce, Simon P., Sivakumar, Monica, Ben Aissa, Assma, Grönroos, Eva, Chandrasekharan, Deepak, Kolluri, Krishna K., Towns, Rebecca, Wang, Kaiwen, Cook, Daniel E., Bosshard-Carter, Leticia, Naceur-Lombardelli, Cristina, Rowan, Andrew J., Veeriah, Selvaraju, Litchfield, Kevin, Crosbie, Philip A. J., Dive, Caroline, Quezada, Sergio A., Janes, Sam M., Jamal-Hanjani, Mariam, Marafioti, Teresa, McGranahan, Nicholas, and Swanton, Charles
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- 2024
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7. Effectiveness of stress arousal reappraisal and stress-is-enhancing mindset interventions on task performance outcomes: a meta-analysis of randomized controlled trials
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Bosshard, Michel and Gomez, Patrick
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- 2024
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8. The gephyrin scaffold modulates cortical layer 2/3 pyramidal neuron responsiveness to single whisker stimulation
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Tsai, Yuan-Chen, Hleihil, Mohammad, Otomo, Kanako, Abegg, Andrin, Cavaccini, Anna, Panzanelli, Patrizia, Cramer, Teresa, Ferrari, Kim David, Barrett, Matthew J. P., Bosshard, Giovanna, Karayannis, Theofanis, Weber, Bruno, Tyagarajan, Shiva K., and Stobart, Jillian L.
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- 2024
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9. Vocal-visual combinations in wild chimpanzees
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Mine, Joseph G., Wilke, Claudia, Zulberti, Chiara, Behjati, Melika, Bosshard, Alexandra B., Stoll, Sabine, Machanda, Zarin P., Manser, Andri, Slocombe, Katie E., and Townsend, Simon W.
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- 2024
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10. Robust handling of extremes in quantile mapping – 'Murder your darlings'
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P. Berg, T. Bosshard, D. Bozhinova, L. Bärring, J. Löw, C. Nilsson, G. Strandberg, J. Södling, J. Thuresson, R. Wilcke, and W. Yang
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Geology ,QE1-996.5 - Abstract
Quantile mapping is a method often used for the bias adjustment of climate model data toward a reference, i.e. to construct a transformation of the model's distribution to that of the reference. The main moments of the distributions are typically well transformed by quantile mapping, but statistical uncertainty increases towards the extreme tails, making robust transformations challenging. Because of the limited data at the extreme tails, an empirical quantile mapping also needs to make some estimation or fit a parameterised function for data beyond the calibration data range. Here, the MIdAS bias adjustment platform is employed to explore different methods for handling the extreme tail; these approaches are evaluated using an indicator of extreme precipitation – the maximum daily precipitation amount per year. Different methodologies are evaluated for a large ensemble of regional climate model projections over Scandinavia. The sensitivity of the empirical quantile mapping to the tails of the distribution is demonstrated, and it is found that the behaviour is significantly different within and outside of the calibration period, causing severe issues with the temporal consistency of the time series. The sensitivity is identified to be due to differences in the activated features of the bias adjustment within the calibration period (where the empirical transfer function is applied) and outside of that period (where the extrapolation method is likely applied). This means that the bias adjustment method is, in a sense, different between different time periods. Furthermore, finding a robust parameterisation for the tail is not straightforward. We identify a two-step solution that works well for this problem: We refer to the first step as “Murder your darlings”. By excluding data from the tail data in the calibration period, the extrapolation feature is activated for all time periods, even the calibration period. In the second step, applying an outlier-insensitive method for linear regression works well for finding an extrapolation parameterisation for the tail.
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- 2024
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11. A note on the Lagrangian cobordism group of Weinstein sectors
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Bosshard, Valentin
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Mathematics - Symplectic Geometry ,53D12 (Primary) 53D37 (Secondary) - Abstract
The aim of this note is to show that the Lagrangian cobordism group of a Weinstein sector is isomorphic to its middle-dimensional singular cohomology. As an application, a geometric description of Viterbo restriction for cobordism groups is obtained., Comment: 7 pages, 2 figures
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- 2023
12. Beyond bigrams: call sequencing in the common marmoset (Callithrix jacchus) vocal system
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Alexandra B. Bosshard, Judith M. Burkart, Paola Merlo, Chundra Cathcart, Simon W. Townsend, and Balthasar Bickel
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whole-repertoire analysis ,Markov chain models ,call sequences ,common marmosets ,animal communication ,Science - Abstract
Over the last two decades, an emerging body of research has demonstrated that non-human animals exhibit the ability to combine context-specific calls into larger sequences. These structures have frequently been compared with language’s syntax, whereby linguistic units are combined to form larger structures, and leveraged to argue that syntax might not be unique to language. Currently, however, the overwhelming majority of examples of call combinations are limited to simple sequences comprising just two calls which differ dramatically from the open-ended hierarchical structuring of the syntax found in language. We revisit this issue by taking a whole-repertoire approach to investigate combinatoriality in common marmosets (Callithrix jacchus). We use Markov chain models to quantify the vocal sequences produced by marmosets providing evidence for structures beyond the bigram, including three-call and even combinations of up to eight or nine calls. Our analyses of these longer vocal sequences are suggestive of potential further internal organization, including some amount of recombination, nestedness and non-adjacent dependencies. We argue that data-driven, whole-repertoire analyses are fundamental to uncovering the combinatorial complexity of non-human animals and will further facilitate meaningful comparisons with language’s combinatoriality.
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- 2024
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13. Machine Learning-based Test Selection for Simulation-based Testing of Self-driving Cars Software
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Birchler, Christian, Khatiri, Sajad, Bosshard, Bill, Gambi, Alessio, and Panichella, Sebastiano
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Computer Science - Software Engineering - Abstract
Simulation platforms facilitate the development of emerging Cyber-Physical Systems (CPS) like self-driving cars (SDC) because they are more efficient and less dangerous than field operational test cases. Despite this, thoroughly testing SDCs in simulated environments remains challenging because SDCs must be tested in a sheer amount of long-running test cases. Past results on software testing optimization have shown that not all the test cases contribute equally to establishing confidence in test subjects' quality and reliability, and the execution of "safe and uninformative" test cases can be skipped to reduce testing effort. However, this problem is only partially addressed in the context of SDC simulation platforms. In this paper, we investigate test selection strategies to increase the cost-effectiveness of simulation-based testing in the context of SDCs. We propose an approach called SDC-Scissor (SDC coSt-effeCtIve teSt SelectOR) that leverages Machine Learning (ML) strategies to identify and skip test cases that are unlikely to detect faults in SDCs before executing them. Our evaluation shows that SDC-Scissor outperforms the baselines. With the Logistic model, we achieve an accuracy of 70%, a precision of 65%, and a recall of 80% in selecting tests leading to a fault and improved testing cost-effectiveness. Specifically, SDC-Scissor avoided the execution of 50% of unnecessary tests as well as outperformed two baseline strategies. Complementary to existing work, we also integrated SDC-Scissor into the context of an industrial organization in the automotive domain to demonstrate how it can be used in industrial settings., Comment: arXiv admin note: substantial text overlap with arXiv:2111.04666
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- 2022
14. Fast Single Photon Detectors and real-time Key Distillation: Enabling High Secret Key Rate QKD Systems
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Grünenfelder, Fadri, Boaron, Alberto, Perrenoud, Matthieu, Resta, Giovanni V., Rusca, Davide, Barreiro, Claudio, Houlmann, Raphaël, Sax, Rebecka, Stasi, Lorenzo, El-Khoury, Sylvain, Hänggi, Esther, Bosshard, Nico, Bussières, Félix, and Zbinden, Hugo
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Quantum Physics - Abstract
Quantum Key Distribution has made continuous progress over the last 20 years and is now commercially available. However, the secret key rates (SKR) are still limited to a few Mbps. Here, we present a custom multipixel superconducting nanowire single-photon detectors and fast acquisition and real-time key distillation electronics, removing two roadblocks and allowing an increase of the SKR of more than an order of magnitude. In combination with a simple 2.5 GHz clocked time-bin quantum key distribution system, we can generate secret keys at a rate of 64 Mbps over a distance of 10.0 km and at a rate of 3.0 Mbps over a distance of 102.4 km with real-time key distillation., Comment: 5 pages, 5 figures, submitted to Nature Photonics
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- 2022
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15. Representation of genomic intratumor heterogeneity in multi-region non-small cell lung cancer patient-derived xenograft models
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Robert E. Hynds, Ariana Huebner, David R. Pearce, Mark S. Hill, Ayse U. Akarca, David A. Moore, Sophia Ward, Kate H. C. Gowers, Takahiro Karasaki, Maise Al Bakir, Gareth A. Wilson, Oriol Pich, Carlos Martínez-Ruiz, A. S. Md Mukarram Hossain, Simon P. Pearce, Monica Sivakumar, Assma Ben Aissa, Eva Grönroos, Deepak Chandrasekharan, Krishna K. Kolluri, Rebecca Towns, Kaiwen Wang, Daniel E. Cook, Leticia Bosshard-Carter, Cristina Naceur-Lombardelli, Andrew J. Rowan, Selvaraju Veeriah, Kevin Litchfield, Philip A. J. Crosbie, Caroline Dive, Sergio A. Quezada, Sam M. Janes, Mariam Jamal-Hanjani, Teresa Marafioti, TRACERx consortium, Nicholas McGranahan, and Charles Swanton
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Science - Abstract
Abstract Patient-derived xenograft (PDX) models are widely used in cancer research. To investigate the genomic fidelity of non-small cell lung cancer PDX models, we established 48 PDX models from 22 patients enrolled in the TRACERx study. Multi-region tumor sampling increased successful PDX engraftment and most models were histologically similar to their parent tumor. Whole-exome sequencing enabled comparison of tumors and PDX models and we provide an adapted mouse reference genome for improved removal of NOD scid gamma (NSG) mouse-derived reads from sequencing data. PDX model establishment caused a genomic bottleneck, with models often representing a single tumor subclone. While distinct tumor subclones were represented in independent models from the same tumor, individual PDX models did not fully recapitulate intratumor heterogeneity. On-going genomic evolution in mice contributed modestly to the genomic distance between tumors and PDX models. Our study highlights the importance of considering primary tumor heterogeneity when using PDX models and emphasizes the benefit of comprehensive tumor sampling.
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- 2024
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16. Effectiveness of stress arousal reappraisal and stress-is-enhancing mindset interventions on task performance outcomes: a meta-analysis of randomized controlled trials
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Michel Bosshard and Patrick Gomez
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Medicine ,Science - Abstract
Abstract Stress arousal reappraisal (SAR) and stress-is-enhancing (SIE) mindset interventions aim to promote a more adaptive stress response by educating individuals about the functionality of stress. As part of this framework, an adaptive stress response is coupled with improved performance on stressful tasks. The goal of this meta-analysis is to evaluate the effectiveness of these interventions on task performance. The literature search yielded 44 effect sizes, and a random-effects model with Knapp-Hartung adjustment was used to pool them. The results revealed an overall small significant improvement in task performance (d = 0.23, p
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- 2024
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17. Non-decreasing Payment Rules for Combinatorial Auctions
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Bosshard, Vitor, Wang, Ye, and Seuken, Sven
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Computer Science - Computer Science and Game Theory - Abstract
Combinatorial auctions are used to allocate resources in domains where bidders have complex preferences over bundles of goods. However, the behavior of bidders under different payment rules is not well understood, and there has been limited success in finding Bayes-Nash equilibria of such auctions due to the computational difficulties involved. In this paper, we introduce non-decreasing payment rules. Under such a rule, the payment of a bidder cannot decrease when he increases his bid, which is a natural and desirable property. VCG-nearest, the payment rule most commonly used in practice, violates this property and can thus be manipulated in surprising ways. In contrast, we show that many other payment rules are non-decreasing. We also show that a non-decreasing payment rule imposes a structure on the auction game that enables us to search for an approximate Bayes-Nash equilibrium much more efficiently than in the general case. Finally, we introduce the utility planes BNE algorithm, which exploits this structure and outperforms a state-of-the-art algorithm by multiple orders of magnitude., Comment: Published at IJCAI 2018. Includes corrigendum explaining a mistake in the original paper
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- 2022
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18. The gephyrin scaffold modulates cortical layer 2/3 pyramidal neuron responsiveness to single whisker stimulation
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Yuan-Chen Tsai, Mohammad Hleihil, Kanako Otomo, Andrin Abegg, Anna Cavaccini, Patrizia Panzanelli, Teresa Cramer, Kim David Ferrari, Matthew J. P. Barrett, Giovanna Bosshard, Theofanis Karayannis, Bruno Weber, Shiva K. Tyagarajan, and Jillian L. Stobart
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GABAA receptors ,Gephyrin ,Barrel cortex ,Electrophysiology ,Two-photon calcium imaging ,Medicine ,Science - Abstract
Abstract Gephyrin is the main scaffolding protein at inhibitory postsynaptic sites, and its clusters are the signaling hubs where several molecular pathways converge. Post-translational modifications (PTMs) of gephyrin alter GABAA receptor clustering at the synapse, but it is unclear how this affects neuronal activity at the circuit level. We assessed the contribution of gephyrin PTMs to microcircuit activity in the mouse barrel cortex by slice electrophysiology and in vivo two-photon calcium imaging of layer 2/3 (L2/3) pyramidal cells during single-whisker stimulation. Our results suggest that, depending on the type of gephyrin PTM, the neuronal activities of L2/3 pyramidal neurons can be differentially modulated, leading to changes in the size of the neuronal population responding to the single-whisker stimulation. Furthermore, we show that gephyrin PTMs have their preference for selecting synaptic GABAA receptor subunits. Our results identify an important role of gephyrin and GABAergic postsynaptic sites for cortical microcircuit function during sensory stimulation.
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- 2024
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19. Machine Learning-based Test Selection for Simulation-based Testing of Self-driving Cars Software
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Khatiri, Sajad, Birchler, Christian, Bosshard, Bill, Gambi, Alessio, and Panichella, Sebastiano
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Computer Science - Software Engineering ,D.2.2 ,D.2.5 ,D.2.8 - Abstract
Abstract Simulation platforms facilitate the development of emerging cyber-physical systems (CPS) like self-driving cars (SDC) because they are more efficient and less dangerous than field operational tests. Despite this, thoroughly testing SDCs in simulated environments remains challenging because SDCs must be tested in a sheer amount of long-running test scenarios. Past results on software testing optimization have shown that not all the tests contribute equally to establishing confidence in test subjects' quality and reliability, with some \uninformative" tests that can be skipped (or removed) to reduce testing effort. However, this problem was partially addressed in the context of SDC simulation platforms. In this paper, we investigate test selection strategies to increase the cost-effectiveness of simulation-based testing in the context of SDCs. We propose an approach called SDC-Scissor (SDC coSt-effeCtIve teSt SelectOR), which leverages machine learning (ML) strategies to identify and skip tests that are unlikely to detect faults in SDCs before executing them. Specifically, SDC-Scissor extract features concerning the characteristics of the test scenarios being executed in the simulation environment and via ML strategies predict tests that lead to faults before executing them. Our evaluation shows that SDC-Scissor achieved high classification accuracy (up to 93.4%) in classifying tests leading to a fault which allows improving testing cost-effectiveness: SDC-Scissor was able to reduce (ca. 170%) the time spent in running irrelevant tests as well as identified 33% more failure triggering tests compared to a randomized baseline. Interestingly, SDC-Scissor does not introduce significant computational overhead in the SDCs testing process, which is critical to SDC development in industrial settings., Comment: 39 pages
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- 2021
20. Hierarchical porous materials made by stereolithographic printing of photo-curable emulsions
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Kleger, Nicole, Minas, Clara, Bosshard, Patrick, Mattich, Iacopo, Masania, Kunal, and Studart, André R.
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Condensed Matter - Soft Condensed Matter ,Condensed Matter - Materials Science - Abstract
Porous materials are relevant for a broad range of technologies from catalysis and filtration, to tissue engineering and lightweight structures. Controlling the porosity of these materials over multiple length scales often leads to enticing new functionalities and higher efficiency but has been limited by manufacturing challenges and the poor understanding of the properties of hierarchical structures. Here, we report an experimental platform for the design and manufacturing of hierarchical porous materials via the stereolithographic printing of stable photo-curable Pickering emulsions. In the printing process, the micron-sized droplets of the emulsified resins work as soft templates for the incorporation of microscale porosity within sequentially photo-polymerized layers. The light patterns used to polymerize each layer on the building stage further generate controlled pores with bespoke three-dimensional geometries at the millimetre scale. Using this combined fabrication approach, we create architectured lattices with mechanical properties tuneable over several orders of magnitude and large complex-shaped inorganic objects with unprecedented porous designs.
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- 2021
21. Shapley-Based Core-Selecting Payment Rules
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Bosshard, Vitor and Seuken, Sven
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Computer Science - Computer Science and Game Theory - Abstract
In this research note, we lay some groundwork for analyzing the manipulability of core-selecting payment rules in combinatorial auctions. In particular, we focus on payment rules based on the bidders' Shapley values. We define a sensitivity metric, and provide analytical results for this metric in LLG, for six different payment vectors used as reference points for minimum-revenue core-selecting payment rules. We furthermore show how this sensitivity affects the derivative of the resulting payment rules., Comment: Research Note
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- 2021
22. Lagrangian Cobordisms in Liouville manifolds
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Bosshard, Valentin
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Mathematics - Symplectic Geometry ,53D12 (Primary) 53D37 (Secondary) - Abstract
Floer theory for Lagrangian cobordisms was developed by Biran and Cornea to study the triangulated structure of the derived Fukaya category of monotone symplectic manifolds. This paper explains how to use the language of stops to study Lagrangian cobordisms in Liouville manifolds and the associated exact triangles in the derived wrapped Fukaya category. Furthermore, we compute the cobordism groups of non-compact Riemann surfaces of finite type., Comment: 43 pages, 12 figures, new subsections 5.3, 5.4
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- 2021
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23. Dead on the Beach? Predicting the Drift of Whale Remains Improves Management for Offshore Disposal
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Jan-Olaf Meynecke, Sasha Zigic, Larissa Perez, Ryan J. K. Dunn, Nathan Benfer, Johan Gustafson, and Simone Bosshard
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modelling ,whale disposal ,sharks ,predation ,drift ,Naval architecture. Shipbuilding. Marine engineering ,VM1-989 ,Oceanography ,GC1-1581 - Abstract
Whale mortality and strandings have increased in recent years, with deceased whales often brought to landfill. However, the disposal of whale remains offshore holds significant ecological importance and can be a culturally and ethically sensitive approach. Moreover, offshore disposal mitigates potential risks associated with onshore whale remains disposal, such as the spread of diseases and the logistical challenges of managing large carcasses. A challenge with offshore disposal is defining the best release location to avoid the remains drifting ashore or into shipping channels. Here we compared the drift model outputs using a drift forecast model (SARMAP) for a 14 m whale carcass that was moved offshore in southeast Queensland, Australia, and fitted with a satellite tracker over an observation period of 150 h until positioning signal ceased. The modelling was conducted using different ocean products (BLUElink, HYCOM, and Copernicus), which showed a good agreement with the tracked whale carcass, albeit with changing wind conditions and contrasting currents flowing northward along the coast and, further offshore, flowing south. This case study illustrated that wind was the foremost driver of carcass drift due to the surface area above the water surface. The drift forecast simulations allowed for a reliable prediction of the floating whale drift that can assist authorities with decision making. Offshore disposal of whale carcasses is a sustainable practice but requires good planning and scientific assessment.
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- 2024
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24. Fast single-photon detectors and real-time key distillation enable high secret-key-rate quantum key distribution systems
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Grünenfelder, Fadri, Boaron, Alberto, Resta, Giovanni V., Perrenoud, Matthieu, Rusca, Davide, Barreiro, Claudio, Houlmann, Raphaël, Sax, Rebecka, Stasi, Lorenzo, El-Khoury, Sylvain, Hänggi, Esther, Bosshard, Nico, Bussières, Félix, and Zbinden, Hugo
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- 2023
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25. Pro-angiogenic and antibacterial copper containing nanoparticles in PLGA/amorphous calcium phosphate bone nanocomposites
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Lukas Näf, Iris Miescher, Lara Pfuderer, Tiziano A. Schweizer, David Brunner, Johannes Dürig, Olivier Gröninger, Julia Rieber, Gabriella Meier-Buergisser, Katharina Spanaus, Maurizio Calcagni, Philipp P. Bosshard, Yvonne Achermann, Wendelin J. Stark, and Johanna Buschmann
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Nanoparticles ,Copper-doped tricalcium phosphate ,Copper oxide ,CAM assay ,qPCR ,VEGF ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Large bone defects after trauma demand for adequate bone substitutes. Bone void fillers should be antibacterial and pro-angiogenic. One viable option is the use of composite materials like the combination of PLGA and amorphous calcium phosphate (aCaP).Copper stimulates angiogenesis and has antibacterial qualities. Either copper oxide (CuO) nanoparticles (NPs) were therefore added to PLGA/aCaP/CuO in different concentrations (1, 5 and 10 w/w %) or copper-doped tricalcium phosphate NPs (TCP with 2% of copper) were electrospun into PLGA/CuTCP nanocomposites.Bi-layered nanocomposites of PLGA/aCaP with different copper NPs (CuO or TCP) and a second layer of pristine PLGA were fabricated. Two clinical bacterial isolates (Staphylococcus aureus and Staphylococcus epidermidis) were used to assess antibacterial properties of the copper-containing materials. For angiogenesis, the chorioallantoic membrane (CAM) assay of the chicken embryo was performed.The higher the CuO content, the higher were the antibacterial properties, with 10 % CuO reducing bacterial adhesion most effectively. Vessel and cell densities were highest in the 5 % CuO containing scaffolds, while tissue integration was more pronounced at lower CuO content. The PLGA/aCaP/CuO (1 % CuO) behaved similar like PLGA/CuTCP in all angiogenic and antibacterial readouts, based on the same copper fraction.We conclude that CuO NPs or CuTCP NPs are useful components to increase angiogenic properties of nanocomposites and at the same time exhibiting antibacterial characteristics.
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- 2024
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26. Decreased skin colonization with Malassezia spp. and increased skin colonization with Candida spp. in patients with severe atopic dermatitis
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Lukas Storz, Bettina Schmid, Philipp Peter Bosshard, Peter Schmid-Grendelmeier, Marie-Charlotte Brüggen, and Claudia Lang
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atopic dermatitis ,Malassezia spp. ,Candida spp. ,sensitization patterns ,skin microbiota ,Medicine (General) ,R5-920 - Abstract
BackgroundAtopic dermatitis (AD) is a chronic relapsing inflammatory skin disease in which patients are sensitized towards a plethora of allergens. The hosts fungal microbiota, the mycobiota, that is believed to be altered in patients suffering from AD acts as such an allergen. The correlation context of specific sensitization, changes in mycobiota and its impact on disease severity however remains poorly understood.ObjectivesWe aim to enhance the understanding of the specific sensitization towards the mycobiota in AD patients in relation to their fungal skin colonization.MethodsSensitization pattern towards the Malassezia spp. and Candida albicans of 16 AD patients and 14 healthy controls (HC) were analyzed with the newly developed multiplex-assay ALEX2® and the established singleplex-assay ImmunoCAP®. We compared these findings with the fungal skin colonization analyzed by DNA sequencing of the internal transcribed spacer region 1 (ITS1).ResultsSensitization in general and towards Malassezia spp. and C. albicans is increased in AD patients compared to HC with a quantitative difference in severe AD when compared to mild to moderate AD. Further we saw an association between sensitization towards and skin colonization with Candida spp. yet a negative correlation between sensitization towards and skin colonization with Malassezia spp.ConclusionWe conclude that AD in general and severe AD in particular is associated with increased sensitization towards the hosts own mycobiota. There is positive correlation in Candida spp. skin colonization and negative in Malassezia spp. skin colonization when compared to AD, AD severity as well as to specific sensitization patterns.
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- 2024
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27. Prevalence of yaws and syphilis in the Ashanti region of Ghana and occurrence of H. ducreyi, herpes simplex virus 1 and herpes simplex virus 2 in skin lesions associated with treponematoses.
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Yaw Agyekum Boaitey, Alex Owusu-Ofori, Amarachukwu Anyogu, Farhang Aghakhanian, Natasha Arora, Jonathan B Parr, Philipp P Bosshard, Saki Raheem, and Pascale Gerbault
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Medicine ,Science - Abstract
Yaws affects children in tropical regions, while syphilis primarily affects sexually active adults worldwide. Despite various campaigns towards the eradication of yaws and elimination of syphilis, these two diseases are still present in Ghana. The aetiological agents of both diseases, two Treponema pallidum subspecies, are genetically similar. This study aimed to assess the prevalence of these treponematoses and the occurrence of pathogens causing similar skin lesions in the Ashanti region of Ghana. A point-of-care test was used to determine the seroprevalence of the treponematoses. Both yaws and syphilis were identified in the Ashanti region of Ghana. Multiplex PCR was used to identify treponemes and other pathogens that cause similar skin lesions. The results indicated that the seroprevalences of T. pallidum in individuals with yaws-like and syphilis-like lesions were 17.2% and 10.8%, respectively. Multiplex PCR results showed that 9.1%, 1.8% and 0.9% of yaws-like lesions were positive for Haemophilus ducreyi, herpes simplex virus-1 (HSV-1) and T. pallidum respectively. Among syphilis-like lesions, 28.3% were positive for herpes simplex virus -2 (HSV-2) by PCR. To our knowledge, this is the first time HSV-I and HSV-2 have been reported from yaws-like and syphilis-like lesions, respectively, in Ghana. The presence of other organisms apart from T. pallidum in yaws-like and syphilis-like lesions could impede the total healing of these lesions and the full recovery of patients. This may complicate efforts to achieve yaws eradication by 2030 and the elimination of syphilis and warrants updated empirical treatment guidelines for skin ulcer diseases.
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- 2024
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28. The Cost of Simple Bidding in Combinatorial Auctions
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Bosshard, Vitor and Seuken, Sven
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Computer Science - Computer Science and Game Theory - Abstract
We study a class of manipulations in combinatorial auctions where bidders fundamentally misrepresent what goods they are interested in. Prior work has largely assumed that bidders only submit bids on their bundles of interest, which we call simple bidding: strategizing over the bid amounts, but not the bundle identities. However, we show that there exists an entire class of auction instances for which simple bids are never optimal in Bayes-Nash equilibrium, always being strictly dominated by complex bids (where bidders bid on goods they are not interested in). We show this result for the two most widely used auction mechanisms: first price and VCG-nearest. We also explore the structural properties of the winner determination problem that cause this phenomenon, and we use the insights gained to investigate how impactful complex bidding may be. We find that, in the worst case, a bidder's optimal complex bid may require bidding on an exponential number of bundles, even if the bidder is interested only in a single good. Thus, this phenomenon can greatly impact the auction's outcome and should not be ignored by bidders and auction designers alike.
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- 2020
29. From threat to challenge—Improving medical students’ stress response and communication skills performance through the combination of stress arousal reappraisal and preparatory worked example-based learning when breaking bad news to simulated patients: study protocol for a randomized controlled trial
- Author
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Bosshard, Michel, Schmitz, Felix Michael, Guttormsen, Sissel, Nater, Urs Markus, Gomez, Patrick, and Berendonk, Christoph
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- 2023
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30. From threat to challenge—Improving medical students’ stress response and communication skills performance through the combination of stress arousal reappraisal and preparatory worked example-based learning when breaking bad news to simulated patients: study protocol for a randomized controlled trial
- Author
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Michel Bosshard, Felix Michael Schmitz, Sissel Guttormsen, Urs Markus Nater, Patrick Gomez, and Christoph Berendonk
- Subjects
Breaking bad news ,Stress ,Arousal ,Reappraisal ,Worked example ,Medical education ,Psychology ,BF1-990 - Abstract
Abstract Background Breaking bad news (BBN; e.g., delivering a cancer diagnosis) is perceived as one of the most demanding communication tasks in the medical field and associated with high levels of stress. Physicians’ increased stress in BBN encounters can negatively impact their communication performance, and in the long term, patient-related health outcomes. Although a growing body of literature acknowledges the stressful nature of BBN, little has been done to address this issue. Therefore, there is a need for appropriate tools to help physicians cope with their stress response, so that they can perform BBN at their best. In the present study, we implement the biopsychosocial model of challenge and threat as theoretical framework. According to this model, the balance between perceived situational demands and perceived coping resources determines whether a stressful performance situation, such as BBN, is experienced as challenge (resources > demands) or threat (resources
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- 2023
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31. From global glacier modeling to catchment hydrology: bridging the gap with the WaSiM-OGGM coupling scheme
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María Herminia Pesci, Philipp Schulte Overberg, Thomas Bosshard, and Kristian Förster
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glacio-hydrological models ,catchment hydrology ,runoff ,VA scaling ,glacier evolution ,future projections ,Environmental technology. Sanitary engineering ,TD1-1066 - Abstract
Coupled glacio-hydrological models have recently become a valuable method for predicting the hydrological response of catchments in mountainous regions under a changing climate. While hydrological models focus mostly on processes of the non-glacierized part of the catchment with a relatively simple glacier representation, the latest generation of standalone (global) glacier models tend to describe glacier processes more accurately by using new global datasets and explicitly modeling ice-flow dynamics. Yet, to the authors' knowledge, existing catchment-scale coupled glacio-hydrological models either do not include these most recent advances in glacier modeling or are simply not available to other users. By making use of the capabilities of the free, distributed, physically-based Water Flow and Balance Simulation Model (WaSiM) and the Open Global Glacier Model (OGGM), a coupling scheme is developed to bridge the gap between global glacier representation and local catchment hydrology. The WaSiM-OGGM coupling scheme is used to further assess the impacts under future climates on the glaciological and hydrological processes in the Gepatschalm catchment (Austria), by considering a combination of three climate projections under the Representative Concentration Pathways (RCP) 2.6, 4.5, and 8.5. Additionally, the results are compared to the original WaSiM model with the integrated Volume-Area (VA) scaling approach for modeling glaciers. Although both models (WaSiM with VA scaling and WaSiM-OGGM coupling scheme) perform very similar during the historical simulations (1971–2010), large discrepancies arise when looking into the future (2011–2100). In terms of runoff, the VA scaling model suggests a reduction of the mean monthly peak between 10–19%, whereas a reduction of 26–41% is computed by the coupling scheme. Similarly, results suggest that glaciers will continuously retreat until 2100. By the end of the century, between 20–43% of the 2010 glacier area will remain according to the VA scaling model, but only 1–23% is expected to remain with the coupling scheme. The results from the WaSiM-OGGM coupling scheme raises awareness of including more sophisticated glacier evolution models when performing hydrological simulations at the catchment scale in the future. As the WaSiM-OGGM coupling scheme is released as open-source software, it is accessible to any interested modeler with limited or even no glacier knowledge.
- Published
- 2023
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- View/download PDF
32. Congenital syphilis in Switzerland: a retrospective cohort study, 2010 to 2019
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Gioia Scherler, Maren Tomaske, Vincenzo Cannizzaro, Anna Steppacher, Franziska Zucol, Martin Theiler, Laurence Toutous Trellu, Anton Labutin, Philipp P. Bosshard, Christoph Berger, and Patrick M. Meyer Sauteur
- Subjects
Medicine - Abstract
AIMS OF THE STUDY: We previously reported a re-emergence of syphilis from 2006 to 2009 with detection of congenital syphilis in Switzerland. This study aimed to reassess the incidence of children exposed to maternal syphilis during pregnancy and congenital syphilis in a following 10-year period in the canton of Zurich, the most populous canton in Switzerland with the highest incidences of syphilis. METHODS: Children were identified both by reviewing medical records at the four major neonatal and paediatric hospitals providing acute care in the canton of Zurich and by the serological database of the syphilis reference laboratory. Inclusion criteria for children were (a) date of birth in the period 2010–2019, (b) place of birth in the canton of Zurich, (c) evaluation for syphilis due to positive syphilis pregnancy screening and (d) age
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- 2023
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33. High-power short-duration ablation index–guided pulmonary vein isolation protocol using a single catheter
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Badertscher, Patrick, Knecht, Sven, Spies, Florian, Völlmin, Gian, Schaer, Beat, Schärli, Nicolas, Bosshard, Flurina, Osswald, Stefan, Sticherling, Christian, and Kühne, Michael
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- 2022
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34. Machine learning-based test selection for simulation-based testing of self-driving cars software
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Birchler, Christian, Khatiri, Sajad, Bosshard, Bill, Gambi, Alessio, and Panichella, Sebastiano
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- 2023
- Full Text
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35. Radio, Podcasts, and Music Streaming—An Electroencephalography and Physiological Analysis of Listeners’ Attitude, Attention, Memory, and Engagement
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Shannon Bosshard, Emma Rodero, Isabel Rodríguez-de-Dios, and Jamie Brickner
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neuroscience ,EEG ,media ,radio ,podcasts ,audio ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Whilst radio, podcasts, and music streaming are considered unique audio formats that offer brands different opportunities, limited research has explored this notion. This current study analyses how the brain responds to these formats and suggests that they offer different branding opportunities. Participants’ engagement, attitude, attention, memory, and physiological arousal were measured while each audio format was consumed. The results revealed that music streaming elicited more positive attitudes, higher attention, greater levels of memory encoding, and increased physiological arousal compared to either radio or podcasts. This study emphasises the importance for brands of utilising diverse audio channels for unique branding and marketing opportunities.
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- 2024
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36. Fighting social isolation in times of pandemic COVID-19: the role of video calls for older hospitalized patients
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Dürst, Anne-Véronique, Graf, Christophe E., Ruggiero, Carmelinda, Zekry, Dina, Boccardi, Virginia, Monney, Lauretta, Joss, Isaline, Vuilloud, Karine, Vespignani, Giulia, Bosshard, Wanda, Mecocci, Patrizia, Bula, Christophe J., and D’Amelio, Patrizia
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- 2022
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37. Computing Bayes-Nash Equilibria in Combinatorial Auctions with Verification
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Bosshard, Vitor, Bünz, Benedikt, Lubin, Benjamin, and Seuken, Sven
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Computer Science - Computer Science and Game Theory - Abstract
We present a new algorithm for computing pure-strategy $\varepsilon$-Bayes-Nash equilibria ($\varepsilon$-BNEs) in combinatorial auctions with continuous value and action spaces. An essential innovation of our algorithm is to separate the algorithm's search phase (for finding the $\varepsilon$-BNE) from the verification phase (for computing the $\varepsilon$). Using this approach, we obtain an algorithm that is both very fast and provides theoretical guarantees on the $\varepsilon$ it finds. Our main technical contribution is a verification method which allows us to upper bound the $\varepsilon$ across the whole continuous value space without making assumptions about the mechanism. Using our algorithm, we can now compute $\varepsilon$-BNEs in multi-minded domains that are significantly more complex than what was previously possible to solve. We release our code under an open-source license to enable researchers to perform algorithmic analyses of auctions, to enable bidders to analyze different strategies, and to facilitate many other applications., Comment: 40 pages
- Published
- 2018
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38. Implications of a Paris-proof scenario for future supply of weather-dependent variable renewable energy in Europe
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Jing Hu, Vinzenz Koning, Thomas Bosshard, Robert Harmsen, Wina Crijns-Graus, Ernst Worrell, and Machteld van den Broek
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Energy ,Renewable energy ,Climate change ,Paris Agreement ,Wind ,Solar ,Energy industries. Energy policy. Fuel trade ,HD9502-9502.5 - Abstract
To meet the European Union's 2050 climate neutrality target, future electricity generation is expected to largely rely on variable renewable energy (VRE). VRE supply, being dependant on weather, is susceptible to changing climate conditions. Based on spatiotemporally explicit climate data under a Paris-proof climate scenario and a comprehensive energy conversion model, this study assesses the projected changes of European VRE supply from the perspective of average production, production variability, spatiotemporal complementarity, and risk of concurrent renewable energy droughts.For the period 2045–2055, we find a minor reduction in average wind and solar production for most of Europe compared to the period 1990–2010. At the country level, the impact of climate change on average VRE production is rather limited in magnitude (within ±3% for wind and ±2% for solar). The projected mid-term changes in other aspects of VRE supply are also relatively small. This suggests climate-related impacts on European VRE supply are less of a concern if the Paris-proof emission reduction pathway is strictly followed.Based on spectral analysis, we identify strong seasonal wind-solar complementarities (with an anticorrelation between -0.6 and -0.9) at the cross-regional level. This reduces the demand for seasonal storage but requires coordinated cross-border efforts to develop a pan-European transmission infrastructure.The risk of concurrent renewable energy droughts between a country and the rest of Europe remains non-negligible, even under the copperplate assumption. Central Western European countries and Poland are most vulnerable to such risk, suggesting the need for the planning of adequate flexibility resources.
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- 2023
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39. Nachsorge nach Steinsanierung bei Urolithiasis
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Stritt, Kevin, Bosshard, Piet, and Roth, Beat
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- 2022
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40. Pseudo Unique Sink Orientations
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Bosshard, Vitor and Gärtner, Bernd
- Subjects
Mathematics - Combinatorics ,Computer Science - Discrete Mathematics ,05A16, 68R05 ,G.2.1 ,F.2.2 - Abstract
A unique sink orientation (USO) is an orientation of the $n$-dimensional cube graph ($n$-cube) such that every face (subcube) has a unique sink. The number of unique sink orientations is $n^{\Theta(2^n)}$. If a cube orientation is not a USO, it contains a pseudo unique sink orientation (PUSO): an orientation of some subcube such that every proper face of it has a unique sink, but the subcube itself hasn't. In this paper, we characterize and count PUSOs of the $n$-cube. We show that PUSOs have a much more rigid structure than USOs and that their number is between $2^{\Omega(2^{n-\log n})}$ and $2^{O(2^n)}$ which is negligible compared to the number of USOs. As tools, we introduce and characterize two new classes of USOs: border USOs (USOs that appear as facets of PUSOs), and odd USOs which are dual to border USOs but easier to understand., Comment: 22 pages, 10 figures
- Published
- 2017
41. Home-based Rehabilitation After Inpatient Rehabilitation: Utilization Rate and Characteristics of Referred Patients.
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Bosshard, Wanda, Seematter-Bagnoud, Laurence, Major, Kristof, Krief, Hélène, and Büla, Christophe J.
- Abstract
To determine the utilization rate of a home-based rehabilitation program after an inpatient rehabilitation stay, and to investigate the profile of users. Observational study. Inpatient rehabilitation facility in a tertiary hospital. Older patients (N=1913) discharged home between June 2018 and May 2021, after an inpatient rehabilitation stay. Not applicable. Discharge to home-based rehabilitation. Over the study period, 296 (15.5%) patients were discharged to home-based rehabilitation. Compared with the others, home-based rehabilitation patients were more frequently women (69.6% vs 61.5%; P =.008), and admitted after orthopedic surgery (elective or for fracture) (30.1% vs 16.1%; P <.001). They had worse functional performance at admission (mean Functional Independence Measure self-care score: 27.8±7.3 vs 30.8±6.7; P <.001), but greater gain in self-care during their inpatient stay (5.0±4.8 vs 4.4±4.7; P =.038). In multivariable analysis, being a woman (adjusted odds ratio [adjOR], 1.36; 95% confidence interval [CI], 1.01-1.82; P =.040), being admitted after orthopedic surgery (adjOR, 2.32; 95% CI, 1.64-3.27; P <.001), being admitted for gait disorders or falls (adjOR, 1.38; 95% CI, 1.01-1.88; P =.039), and showing greater gain in mobility during the inpatient stay (adjOR, 1.12; 95% CI, 1.07-1.17; P <.001) remained associated with discharge to home-based rehabilitation. In contrast, higher mobility at discharge decreased the odds of discharge to home-based rehabilitation (adjOR, 0.87; 95% CI, 0.83-0.91; P <.001). One in 6 patients benefited from home-based rehabilitation after their inpatient stay. Although these patients had poorer functional performance at admission and discharge, they showed greater mobility improvement during their inpatient stay, suggesting that their good recovery potential was a key determinant of their orientation toward home-based rehabilitation. [ABSTRACT FROM AUTHOR]
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- 2024
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42. The impact of stenting prior to oral chemolysis of upper urinary tract uric acid stones
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Tsaturyan, Arman, Bosshard, Piet, Bokova, Elizaveta, Bonny, Olivier, Stritt, Kevin, and Roth, Beat
- Published
- 2022
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43. Pain Interventions for people with dementia: a quasi-experimental study
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Spichiger, Frank, Volken, Thomas, Bosshard, Georg, Zigan, Nicole, Blanc, Geneviève, Büscher, Andreas, Nagl-Cupal, Martin, Bernard, Mathieu, Rubli Truchard, Eve, Larkin, Philip, and Koppitz, Andrea
- Published
- 2022
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44. Repolarization of Negative Muons by Polarized $^{209}$Bi Nuclei
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Kadono, R., Imazato, J., Ishikawa, T., Nishiyama, K., Nagamine, K., Yamazaki, T., Bosshard, A., Döbeli, M., van Elmbt, L., Schaad, M., Truöl, P., Bay, A., Perroud, J. P., Deutsch, J., Tasiaux, B., and Hagn, E.
- Subjects
Nuclear Experiment - Abstract
A large $\mu^-$ polarization was achieved in muonic Bi atoms with the help of the strong hyperfine field in a polarized nuclear target. Using $^{209}$Bi nuclei polarized to ($59\pm9$)% in ferromagnetic BiMn, we observed a $\mu$-$e$ decay asymmetry of ($13.1\pm3.9$)%, which gives $\mu^-$ polarization per nuclear polarization equal to $-1.07\pm 0.35$. This value is almost consistent with $-0.792$ calculated for nuclei with spin $I= \frac{9}{2}$ and a positive magnetic moment under the assumption that the hyperfine interaction becomes effective in the lowest muonic states., Comment: Corrected version of original paper, 4 pages, 2 figures, corrections indicated by red
- Published
- 2016
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45. Sonic Influence on Initially Neutral Brands: Using EEG to Unveil the Secrets of Audio Evaluative Conditioning
- Author
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Shannon Bosshard and Peter Walla
- Subjects
neutral brands ,evaluative conditioning (EC) ,electroencephalography (EEG) ,event-related potentials (ERPs) ,neuromarketing ,information technology ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
The present study addresses the question of whether explicit, survey-type measures of attitude differ in sensitivity when compared to implicit, non-conscious measures of attitude in the context of attitude changes in response to evaluative conditioning (EC). In the frame of a pre-test, participants rated 300 brand names on a Likert-type scale, the results of which were then used to create personalised lists of neutral brands. After this initial online component, the participants were exposed to one, five, and ten rounds of EC (during three separate sessions), during which half of the brands were paired with pleasant audio excerpts (positive EC) and the remainder were paired with unpleasant audio excerpts (negative EC). Following each conditioning round, the participants rated the brand names again, whilst changes in the brain’s electrical activity in response to the brands were recorded via electroencephalography (EEG). After having rated the brand names, the participants also completed two implicit association tests (IAT; one for each of the neutral conditions). The results revealed that self-reported, explicit responses of brand names remained unchanged despite having been conditioned. Similarly, the IAT did not reveal any declines in reaction time. In contrast, the EEG data appeared to not only be sensitive to initial brand ratings, but also the conditioning effects of initially neutral brands. Respective neurophysiological effects were found at frontal electrode locations AF3 and AF4 for a 1 s-long time window starting at 400 ms after stimulus onset. Furthermore, the EEG revealed that changes in brand attitude are more susceptible to the effects of negative conditioning than positive conditioning. Given the rather small sample size, any generalizability seems vague, but the present results provide scientific evidence that EEG could indeed be a valuable additional method to investigate EC effects. The results of this study support the notion of utilising a multidimensional approach, inclusive of neuroscience, to understanding consumer attitudes instead of solely relying on self-report measures. In the end, the brain knows more than it admits to consciousness and language, which is why objective methods should always be included in any study.
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- 2023
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46. Seeding African Forest and Landscape Restoration: Evaluating Native Tree Seed Systems in Four African Countries
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Fiona L. Giacomini, John A. Prempeh, Riina Jalonen, Barbara Vinceti, Marius Ekue, Ennia Bosshard, David F. R. P. Burslem, and Chris J. Kettle
- Subjects
Burkina Faso ,Cameroon ,Ghana ,Kenya ,tree seed supply ,native tree seed ,Biology (General) ,QH301-705.5 - Abstract
Commitments to Forest and Landscape Restoration are rapidly growing and being implemented globally to tackle the climate and biodiversity crises. Restoration initiatives largely based on tree planting necessitate an increased supply of high-quality and suitably adapted tree planting material. We evaluated the native tree seed supply systems in Burkina Faso, Cameroon, Ghana, and Kenya, four countries with large commitments to increase tree cover. We applied an established indicator framework to assess the adequacy of any current tree seed system to meet national needs. The study aimed to analyse (i) how well-established the native tree seed supply systems are, (ii) how public and non-public actors differ regarding the perception of existing seed systems, and (iii) the main barriers to strengthening current seed systems. Our findings identified significant gaps in the native tree seed supply systems of the four countries, arising particularly from shortfalls in the enabling environment. We found a lack of involvement of local community members in the seed systems, with a crucial need for strengthening policy, capacity building and investment in seed systems. We propose a multi-stakeholder approach and the application of online tools to improve seed systems to meet the demand for high-quality native tree seeds.
- Published
- 2023
- Full Text
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47. A Survey on Attitude, Awareness, and Knowledge of Patients Regarding the Use of Dental Implants at a Swiss University Clinic
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Adib Al-Haj Husain, Olivia De Cicco, Bernd Stadlinger, Fabienne Andrina Bosshard, Valérie Schmidt, Mutlu Özcan, and Silvio Valdec
- Subjects
dental implant ,awareness ,attitude ,knowledge ,questionnaire ,tooth replacement ,Dentistry ,RK1-715 - Abstract
Even though restoring missing teeth and oral tissue with dental implants is perceived by most patients as a positive experience, patients lack access to evidence-based information about different treatment options. In order to provide more accurate information for public dental education in Switzerland and to compare it worldwide, this descriptive cross-sectional survey-based study assessed pre-operative attitudes, awareness, and knowledge of patients. A total of 160 patients with indication for tooth extraction were selected randomly from clinical routine between August 2022 and February 2023. Statistical analysis was performed including the chi-square test based on a significance level of 0.05. The results confirm that most patients (78%) were aware of implants as a treatment option for replacing missing teeth and consider them a prioritized solution (79%). Their primary sources of information are dentists (59%), the Internet (50%), relatives and friends (40%). The majority of patients (84%) wanted the surgical procedure to be performed by a board-certified clinical specialist expecting high functional and aesthetic outcomes. Low levels of knowledge could be observed regarding postoperative care, functionality, and clinical performance of implants. This survey-based study revealed a positive attitude and an acceptable level of awareness and knowledge regarding the use of dental implants.
- Published
- 2023
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48. From collocations to call-ocations: using linguistic methods to quantify animal call combinations
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Bosshard, Alexandra B., Leroux, Maël, Lester, Nicholas A., Bickel, Balthasar, Stoll, Sabine, and Townsend, Simon W.
- Published
- 2022
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49. Rituximab and Canakinumab Use During Lactation: No Detectable Serum Levels in Breastfed Infants
- Author
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Bosshard, Nicole, Zbinden, Astrid, Eriksson, Klara Kristin, and Förger, Frauke
- Published
- 2021
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50. Dissection of the mutation accumulation process during bacterial range expansions
- Author
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Lars Bosshard, Stephan Peischl, Martin Ackermann, and Laurent Excoffier
- Subjects
Experimental evolution ,Range expansion ,Mutation load ,Biotechnology ,TP248.13-248.65 ,Genetics ,QH426-470 - Abstract
Abstract Background Recent experimental work has shown that the evolutionary dynamics of bacteria expanding across space can differ dramatically from what we expect under well-mixed conditions. During spatial expansion, deleterious mutations can accumulate due to inefficient selection on the expansion front, potentially interfering with and modifying adaptive evolutionary processes. Results We used whole genome sequencing to follow the genomic evolution of 10 mutator Escherichia coli lines during 39 days ( ~ 1650 generations) of a spatial expansion, which allowed us to gain a temporal perspective on the interaction of adaptive and non-adaptive evolutionary processes during range expansions. We used elastic net regression to infer the positive or negative effects of mutations on colony growth. The colony size, measured after three day of growth, decreased at the end of the experiment in all 10 lines, and mutations accumulated at a nearly constant rate over the whole experiment. We find evidence that beneficial mutations accumulate primarily at an early stage of the experiment, leading to a non-linear change of colony size over time. Indeed, the rate of colony size expansion remains almost constant at the beginning of the experiment and then decreases after ~ 12 days of evolution. We also find that beneficial mutations are enriched in genes encoding transport proteins, and genes coding for the membrane structure, whereas deleterious mutations show no enrichment for any biological process. Conclusions Our experiment shows that beneficial mutations target specific biological functions mostly involved in inter or extra membrane processes, whereas deleterious mutations are randomly distributed over the whole genome. It thus appears that the interaction between genetic drift and the availability or depletion of beneficial mutations determines the change in fitness of bacterial populations during range expansion.
- Published
- 2020
- Full Text
- View/download PDF
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