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Search Results: 1 - 10 of 18548 matches for " Marco Angel Bertani-?kland "
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Mutating loops and 2-cycles in 2-CY triangulated categories
Marco Angel Bertani-?kland,Steffen Oppermann
Mathematics , 2010,
Abstract: We derive an algorithm for mutating quivers of 2-CY tilted algebras that have loops and 2-cycles, under certain specific conditions. Further, we give the classification of the 2-CY tilted algebras coming from standard algebraic 2-CY triangulated categories with a finite number of indecomposables. These form a class of algebras that satisfy the setup for our mutation algorithm.
Finding a cluster-tilting object for a representation finite cluster-tilted algebra
Marco Angel Bertani-?kland,Steffen Oppermann,Anette Wr?lsen
Mathematics , 2009,
Abstract: We provide a technique to find a cluster-tilting object having a given cluster-tilted algebra as endomorphism ring in the finite type case.
Graded mutation in cluster categories coming from hereditary categories with a tilting object
Marco Angel Bertani-?kland,Steffen Oppermann,Anette Wr?lsen
Mathematics , 2010,
Abstract: We present a graded mutation rule for quivers of cluster-tilted algebras. Furthermore, we give a technique to recover a cluster-tilting object from its graded quiver in the cluster category of coh $\mathbb{X}$.
Constructing tilted algebras from cluster-tilted algebras
Marco Angel Bertani-?kland,Steffen Oppermann,Anette Wr?lsen
Mathematics , 2009, DOI: 10.1016/j.jalgebra.2010.02.026
Abstract: Any cluster-tilted algebra is the relation extension of a tilted algebra. We present a method to, given the distribution of a cluster-tilting object in the Auslander-Reiten quiver of the cluster category, construct all tilted algebras whose relation extension is the endomorphism ring of this cluster-tilting object.
Improving Back-Propagation by Adding an Adversarial Gradient
Arild N?kland
Computer Science , 2015,
Abstract: The back-propagation algorithm is widely used for learning in artificial neural networks. A challenge in machine learning is to create models that generalize to new data samples not seen in the training data. Recently, a common flaw in several machine learning algorithms was discovered: small perturbations added to the input data lead to consistent misclassification of data samples. Samples that easily mislead the model are called adversarial examples. Training a "maxout" network on adversarial examples has shown to decrease this vulnerability, but also increase classification performance. This paper shows that adversarial training has a regularizing effect also in networks with logistic, hyperbolic tangent and rectified linear units. A simple extension to the back-propagation method is proposed, that adds an adversarial gradient to the training. The extension requires an additional forward and backward pass to calculate a modified input sample, or mini batch, used as input for standard back-propagation learning. The first experimental results on MNIST show that the "adversarial back-propagation" method increases the resistance to adversarial examples and boosts the classification performance. The extension reduces the classification error on the permutation invariant MNIST from 1.60% to 0.95% in a logistic network, and from 1.40% to 0.78% in a network with rectified linear units. Based on these promising results, adversarial back-propagation is proposed as a stand-alone regularizing method that should be further investigated.
Combined therapeutic approach: Inflammatory bowel diseases and peripheral or axial arthritis
Fabiola Atzeni, Sandro Ardizzone, Luca Bertani, Marco Antivalle, Alberto Batticciotto, Piercarlo Sarzi-Puttini
World Journal of Gastroenterology , 2009,
Abstract: Inflammatory bowel diseases (IBDs), particularly Crohn’s disease (CD) and ulcerative colitis (UC), are associated with a variety of extra-intestinal manifestations (EIMs). About 36% of IBD patients have at least one EIM, which most frequently affect the joints, skin, eyes and the biliary tract. The EIMs associated with IBD have a negative impact on patients with UC and CD, and the resolution of most of them parallels that of the active IBD in terms of timing and required therapy; however, the clinical course of EIMs such as axial arthritis, pyoderma gangrenosum, uveitis, and primary sclerosing cholangitis is independent of IBD activity. The peripheral and axial arthritis associated with IBD have traditionally been treated with simple analgesics, non-steroidal anti-inflammatory drugs, steroids, sulfasalazine, methotrexate, local steroid injections and physiotherapy, but the introduction of biological response modifiers such as tumor necrosis factor-α blockers, has led to further improvements.
Revision, cladistic analysis and biogeography of Typhochlaena C. L. Koch, 1850, Pachistopelma Pocock, 1901 and Iridopelma Pocock, 1901 (Araneae, Theraphosidae, Aviculariinae)
Rogerio Bertani
ZooKeys , 2012, DOI: 10.3897/zookeys.230.3500
Abstract: Three aviculariine genera endemic to Brazil are revised. Typhochlaena C. L. Koch, 1850 is resurrected, including five species; Pachistopelma Pocock, 1901 includes two species; and Iridopelma Pocock, 1901, six species. Nine species are newly described: Typhochlaena amma sp. n., T. costae sp. n., T. curumim sp. n., T. paschoali sp. n., Pachistopelma bromelicola sp. n., Iridopelma katiae sp. n., I. marcoi sp. n., I. oliveirai sp. n. and I. vanini sp. n. Three new synonymies are established: Avicularia pulchra Mello-Leit o, 1933 and Avicularia recifiensis Struchen & Br ndle, 1996 are junior synonyms of Pachistopelma rufonigrum Pocock, 1901 syn. n., and Avicularia palmicola Mello-Leit o, 1945 is a junior synonym of Iridopelma hirsutum Pocock, 1901 syn. n. Pachistopelma concolor Caporiacco, 1947 is transferred to Tapinauchenius Ausserer, 1871, making the new combination Tapinauchenius concolor (Caporiacco, 1947) comb. n. Lectotypes are newly designed for Pachistopelma rufonigrum Pocock, 1901 , Iridopelma hirsutum Pocock, 1901 and Pachistopelma concolor Caporiacco, 1947. Cladistic analyses using both equal and implied weights were carried out with a matrix comprising 62 characters and 38 terminal taxa. The chosen cladogram found with X-Pee-Wee and concavity 6 suggests they are monophyletic. All species are keyed and mapped and information on species habitat and area cladograms are presented. Discussion on biogeography and conservation is provided.
Miss Taylor dos pampas
Bertani, Karine
Sess?es do Imaginário , 2000,
Abstract:
The Finuda Experiment: Status and Perspectives
M. Bertani
Physics , 2001,
Abstract: FINUDA is a hypernuclear physics experiment that will be carried out at DA$\Phi$NE, the $e^+e^-$ $\phi$-factory currently in operation at the INFN Frascati Laboratory. The apparatus, which is assembled in the DA$\Phi$NE hall, consists of a magnetic spectrometer with high resolution tracking capabilities. In this paper the status of the experiment is presented, together with the main features of the apparatus and of its physics program.
Developing Mathematical Literacy,Based on Elemental Software and Academic Tools Development  [PDF]
Oscar H. Salinas, Angel Estrada Arteaga, Martha E. Luna, Marco A. Amado González
Creative Education (CE) , 2013, DOI: 10.4236/ce.2013.47A2023
Abstract:

This report describes the procedure to develop mathematical literacy through learning basic mathematical concepts, and applying the acquired knowledge for the development of elemental software to be used as academic tool. Basic operations with matrix were performed using open and commercial sources software. A simple and basic matrix calculator were developed integrating mathematical concepts and software development skills, and the deliverable was a calculator developed on Java platform. The procedure started from a traditional classroom explanation; worked on calculus worksheet, solving some academic problems about addition, subtracted product of two matrix, following by the use of some commercial software, and finally the development of the own academic tool. These works were developed into the frame of competency based education system.

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