Search results for "BMO"

Finitely randomized dyadic systems and BMO on metric measure spaces

2015

Abstract We study the connection between BMO and dyadic BMO in metric measure spaces using finitely randomized dyadic systems, and give a Garnett–Jones type proof for a theorem of Uchiyama on a construction of certain BMO functions. We obtain a relation between the BMO norm of a suitable expectation over dyadic systems and the dyadic BMO norms of the original functions in different systems. The expectation is taken over only finitely randomized dyadic systems to overcome certain measurability questions. Applying our result, we derive Uchiyama’s theorem from its dyadic counterpart, which we also prove.

A short proof of a theorem of Juhasz

2011

Abstract We give a simple proof of the increasing strengthening of Arhangelʼskii Theorem. Our proof naturally leads to a refinement of this result of Juhasz.

The on-line coupled atmospheric chemistry model system MECO(n) – Part 5: Expanding the Multi-Model-Driver (MMD v2.0) for 2-way data exchange includin…

2018

Abstract. As part of the Modular Earth Submodel System (MESSy), the Multi-Model-Driver (MMD v1.0) was developed to couple online the regional Consortium for Small-scale Modeling (COSMO) model into a driving model, which can be either the regional COSMO model or the global European Centre Hamburg general circulation model (ECHAM) (see Part 2 of the model documentation). The coupled system is called MECO(n), i.e., MESSy-fied ECHAM and COSMO models nested n times. In this article, which is part of the model documentation of the MECO(n) system, the second generation of MMD is introduced. MMD comprises the message-passing infrastructure required for the parallel execution (multiple programme mul…

Norm estimates for operators from Hp to ℓq

AbstractWe give upper and lower estimates of the norm of a bounded linear operator from the Hardy space Hp to ℓq in terms of the norm of the rows and the columns of its associated matrix in certain vector-valued sequence spaces.

Characterization of thin film CIG(S,SE)2 submodules using solar simulator and laser beam induced current techniques (Versione estesa)

2015

In this work, the electrical and optical characterization of CIG(S, Se)2 sub-modules using both a solar simulator equipment and the Laser Beam Induced Current (LBIC) technique is presented. By using the solar simulator and a proper set-up, the electrical parameters of the modules at varying irradiance and temperatures are determined. In addition, the LBIC measurements are carried out to analyze the 2D photocurrent uniformity of the modules at two different wavelengths. Dispersion values of extracted parameters can be very useful for practically tuning the modelling stage at device/module level.

Team Theory and Person-by-Person Optimization with Binary Decisions

2012

In this paper, we extend the notion of person-by-person (pbp) optimization to binary decision spaces. The novelty of our approach is the adaptation to a dynamic team context of notions borrowed from the pseudo-boolean optimization field as completely local-global or unimodal functions and submodularity. We also generalize the concept of pbp optimization to the case where groups of $m$ decisions makers make joint decisions sequentially, which we refer to as $m$b$m$ optimization. The main contribution is a description of sufficient conditions, verifiable in polynomial time, under which a pbp or an $m$b$m$ optimization algorithm converges to the team-optimum. As a second contribution, we prese…

Dall’altra parte dello spazio. Immaginazioni surmoderne nell’iconografia di Di Donato

2017

L’articolo propone l’analisi del portfolio Nonluoghi di Michele Di Donato. Con il suo lavoro, l’artista ha proposto il suo punto di vista sui Nonluoghi descritti negli anni Novanta dall’antropologo francese Marc Augé. I nonluoghi (piazze, sala d’attesa di stazioni o aeroporti, treni o aerei, centri storici, centri commerciali, hall di alberghi e musei) sono tutti quegli spazi della contemporaneità che per il fatto di essere transitori e non identitari acquistano una dimensione altra, fondamentalmente accessibile eppure sempre labile e temporanea. Di Donato si concentra, così, sul nonluogo in quanto teoria dell’assenza, un’antropologia della solitudine, dell’impersonalità e del rimando a un …

A note on discrete sets

2009

We give several partial positive answers to a question of Juhasz and Szentmiklossy regarding the minimum number of discrete sets required to cover a compact space. We study the relationship between the size of discrete sets, free sequences and their closures with the cardinality of a Hausdorff space, improving known results in the literature.

Obmowa, osądzanie, narzekanie czy milczenie? Rozważania Ojców Pustyni

2021

Pod koniec III wieku rozpoczyna się ruch monastyczny zainicjowany przez św. Antoniego, Powstała w ten sposób nowa forma ascezy charakteryzująca się zerwaniem ze światem, społeczeństwem: anachoreza, czyli pustelnictwo. Odtąd życie pustelników ma być pełne wyrzeczeń, na które składają się post, wstrzemięźliwość seksualna, modlitwa i praca, ale też milczenie. Wierzono bowiem, że tylko w ciszy brat otrzyma szansę na spotkanie Boga, usłyszenia Jego Słowa i tym samym wkroczy w Jego tajemnicę, a potem będzie mógł innych do tej tajemnicy doprowadzić, dzięki potędze swej miłości i pokory. Milczenie, zachowanie ciszy, powstrzymywanie się przed uwolnieniem słów były niezwykle ważnymi i częstymi temata…

Obmowa, osądzanie, narzekanie czy milczenie? Rozważania Ojców Pustyni

2021

Pod koniec III wieku rozpoczyna się ruch monastyczny zainicjowany przez św. Antoniego. Powstała w ten sposób nowa forma ascezy charakteryzująca się zerwaniem ze światem, społeczeństwem (anachoreza, czyli pustelnictwo). Odtąd życie pustelników ma być pełne wyrzeczeń, na które składają się post, wstrzemięźliwość seksualna, modlitwa i praca, ale też milczenie. Wierzono bowiem, że tylko w ciszy brat otrzyma szansę spotkania z Bogiem, że usłyszy Jego Słowa i tym samym wkroczy w Jego tajemnicę, a potem będzie mógł innych do tej tajemnicy doprowadzić dzięki potędze miłości i pokory. Milczenie, zachowanie ciszy, powstrzymywanie się przed uwolnieniem słów były niezwykle ważnymi i częstymi tematami p…