364 research outputs found
REPLICA-SYMMETRY BREAKING IN NEURAL NETWORKS
No full textReplica-symmetry breaking is studied in fully connected neural networks with modified pseudo-inverse interactions. The interaction matrix has an intermediate form between the Hebb learning rule and the pseudo-inverse one. At low temperature there is a region of parameters where the replica-symmetric solution is stable while its entropy is negative. It indicates the existence of the alternative solution in which the replica symmetry is broken. A one-step replica-symmetry breaking solution is found and its properties are analyzed
MODIFIED PSEUDO-INVERSE NEURAL NETWORKS STORING CORRELATED PATTERNS
No full textNeural networks with symmetric couplings which have an intermediate form between the Hebb learning rule and the pseudo-inverse one, storing strongly correlated patterns, are studied. Signal-to-noise analysis is made and replica-symmetric thermodynamic Calculations are performed. Both approaches show that both in the Hopfield model limit and in the Pseudo-inverse model limit the maximal capacity of the order of (2p/In(1/p)-1 (where p << 1 is the average neural activity) can be achieved by appropriate adjustment of the threshold term of the Hamiltonian
Cooperative dynamics in two-component out-of-equilibrium systems: molecular ‘spinning tops’
No full textWe study the two-dimensional Langevin dynamics of a mixture of two types of particles that live respectively at two different temperatures. Dynamics is constrained by an optical trap and the dissimilar species interact via a quadratic potential. We realize that the system evolves toward a peculiar non-equilibrium steady-state with a non-zero probability current possessing a non-zero curl. This implies that if the particles were to have a finite-size and therefore a rotational degree of freedom, they would experience a torque generated by the non-zero local curl and spin around their geometric centers, like ‘spinning top’ toys. Our analysis shows that the spinning motion is correlated and also reveals an emerging cooperative behavior of the spatial components of the probability currents of dissimilar species
Time-dependence of the effective temperatures of a two-dimensional Brownian gyrator with cold and hot components
No full textWe consider a model of a two-dimensional molecular machine - called Brownian gyrator - that consists of two coordinates coupled to each other and to separate heat baths at temperatures respectively T x and T y . We consider the limit in which one component is passive, because its bath is 'cold', T x → 0, while the second is in contact with a 'hot' bath, T y > 0, hence it entrains the passive component in a stochastic motion. We derive an asymmetry relation as a function of time, from which time dependent effective temperatures can be obtained for both components. We find that the effective temperature of the passive element tends to a constant value, which is a fraction of T y , while the effective temperature of the driving component grows without bounds, in fact exponentially in time, as the steady-state is approached
Out-of-equilibrium dynamics of two interacting optically-trapped particles
No full textWe present a theoretical analysis of a non-equilibrium dynamics in a model system consisting of two particles which move randomly on a plane. The two particles interact via a harmonic potential, experience their own (independent from each other) noises characterized by two different temperatures T1 and T2, and each particle is being held by its own optical tweezer. Such a system with two particles coupled by hydrodynamic interactions was previously realised experimentally in Bérut et al. [EPL 107, 60004 (2014)], and the difference between two temperatures has been achieved by exerting an additional noise on either of the tweezers. Framing the dynamics in terms of two coupled over-damped Langevin equations, we show that the system reaches a non-equilibrium steady-state with non-zero (for T1 ≠ T2) probability currents that possess non-zero curls. As a consequence, in this system the particles are continuously spinning around their centers of mass in a completely synchronized way - the curls of currents at the instantaneous positions of two particles have the same magnitude and sign. Moreover, we demonstrate that the components of currents of two particles are strongly correlated and undergo a rotational motion along closed elliptic orbits
Russkie chudožniki v teatre La Skala v pervoj polovine XX veka
No full textThe article consists in an overview of how Russian scenographers contributed to the theatrical activity of Milan’s Theatre La Scala over the years of Russian emigration. The first artist to be mentioned is Nikolaj Benois, who started to work as scenery designer in Milan in 1925 and was successively appointed Director of Scenic Design in 1937. Having been assigned to such a prestigious post, he was then able to involve a number of Russian painters, including his father Aleksandr - whom the Milanese had known since the time of the “Ballets russes” tours - Grigorij Sciltian and Vsevolod Nikulin, in the setting up of theatre plays based on the Russian classics and almost invariably unpublished in Italy. Creating their scenic design, sketches and figure-plates, Russian scenic artists contributed to changing the attitude of the Milanese audience towards the perception of Russian culture, turning it into a more complex relation and leaving behind any exoticism-related platitude or simplistic view
JETP Letters V. 66, I .11
No full textJETP Letters -- December 10, 1997
Volume 66, Issue 11, pp. 705-782
Hamiltonian theory of integrable generalizations of the nonlinear Schrödinger equation
V. G. Marikhin
Full Text: PDF (95 kB)
Spherical striations in a glow discharge
O. A. Nerushev, S. A. Novopashin, V. V. Radchenko, and G. I. Sukhinin
Full Text: PDF (113 kB)
Dependence of the specific heat of a La1.85Sr0.15CuO4 superconducting single crystal on the magnetic field direction in the a–b plane
M. N. Khlopkin, G. Kh. Panova, N. A. Chernoplekov, and A. A. Shikov
Full Text: PDF (76 kB)
Dynamic self-organization of magnetic domains in amorphous films with perpendicular anisotropy
G. S. Kandaurova and V. E. Ivanov
Full Text: PDF (136 kB)
Influence of the quantum size effect for grazing electrons on the electronic conductivity of metal films
G. M. Mikhailov, I. V. Malikov, and A. V. Chernykh
Full Text: PDF (102 kB)
Scaling in the ab resistivity of TmBaCuO single crystals in the normal state
E. B. Amitin, V. Ya. Dikovskii, A. N. Lavrov, and A. P. Shelkovnikov
Full Text: PDF (77 kB)
On the electron mobility of delta layers in the presence of diamagnetic "ejection" of size-quantization levels
D. Yu. Ivanov, S. V. Morozov, Yu. V. Dubrovskii, S. Yu. Shapoval, V. V. Valyaev, and V. L. Gurtovoi
Full Text: PDF (79 kB)
Double-well coherent laser with suppressed intersubband relaxation
V. F. Elesin, A. V. Tsukanov, V. V. Kapaev, and Yu. V. Kopaev
Full Text: PDF (95 kB)
Efficient electronic energy transfer from a semiconductor quantum well to an organic material
V. M. Agranovich, G. C. La Rocca, and F. Bassani
Full Text: PDF (65 kB)
Crossover scale of the fixed point with replica symmetry breaking in the random Potts model
S. B. Bravyi and V. S. Dotsenko
Full Text: PDF (100 kB)
Mn55 NMR investigation of the suppression of quantum fluctuations in quasi-one-dimensional antiferromagnets by a magnetic field
A. S. Borovik-Romanov, S. V. Petrov, A. M. Tikhonov, and B. S. Dumesh
Full Text: PDF (100 kB)
Charged and neutral excitonic complexes in GaAs/AlGaAs quantum wells
O. V. Volkov, V. E. Zhitomirskii, I. V. Kukushkin, V. E. Bisti, K. von Klitzing, and K. Eberl
Full Text: PDF (108 kB)
Coherent-states quantum cryptography based on a quantum comparator
S. N. Molotkov
Full Text: PDF (94 kB)
Nonstationary-states quantum cryptography
S. N. Molotkov and S. S. Nazin
Full Text: PDF (87 kB)Archived web conten
Business plan of Capsule hostel
No full textČeská republika je jednou z nejpopulárnějších a nejoblíbenějších destinací v Evropě s trvalou a neustále rostoucí popularitou mezi turisty. V současné době, kvůli neustále sílící konkurenci, se ubytovací zařízení začínají odlišovat nejenom lokalitou a cenou, ale i poskytnutím svých různorodých služeb, designem, komfortem a kvalitou, která se blíží úrovni hotelů. Hlavním cílem bakalářské práce je zpracování reálného podnikatelského plánu na založení kapslového hostelu v Praze, který se objeví na českém trhu poprvé, ověření jeho životaschopnosti a vymezení všech slabých a silných stránek, hrozeb a příležitostí. Bakalářská práce je rozdělena na teoretickou a praktickou část. Teoretická část obsahuje poznatky z oblasti podnikání, které jsou nezbytné k pochopení pro otevření nové firmy na českém trhu, přehled základní související legislativy a obecné informace o cestovním ruchu v České republice. Poslední velká kapitola je věnována samotnému podnikatelskému plánu. Praktická část zahrnuje především analýzu mikro- a makrookolí podniku, popis vhodné i účinné marketingové strategie a zpracování finančního plánu podle různých scénářů. Podle analýzy okolí podniku a hlavně výsledků finančního plánu se prokázalo, že otevření kapslového hostelu má smysl a podle reálné varianty by se celková investice měla vrátit během pěti let.The Czech Republic is one of the most popular and favourite destinations in Europe with a continuously increasing number of tourists. Nowadays, facing rough competition, accommodation facilities besides the different locations and price categories have started to be innovative in their services, design and quality that approaches the level of hotels. The main purpose of this bachelor's thesis is the elaboration of the realistic business plan on the establishment of a capsule hostel in Prague that will appear on the Czech market for the first time and the evaluation of its weak and strong sides as well as threads and opportunities. The bachelor's thesis consists of a practical and theoretical part. The theoretical part is focused on knowledge how to set up a business that is essential for the establishment of a new firm on the Czech market, the overview of basic related legislation and the general information on tourism in the Czech Republic. The last chapter is dedicated to the business plan itself. The practical part comprises the micro and macro analysis of the enterprise, the description of the marketing strategy and the elaboration of the financial plan by different scenarios. The environment analysis of the enterprise and the outcomes of the financial plan have proven that it makes sense to open the capsule hostel, and the whole investment should be paid off during five years according to the real scenario
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