432 research outputs found
Bacteriostatic conformal coating for electronic components
Coating for electronic components used in space applications has bacteriostatic qualities capable of hindering bacterial reproduction, both vegetative and sporulative viable microorganisms. It exhibits high electrical resistivity, a low outgassing rate, and is capable of restraining electronic components when subjected to mechanical vibrations
Bacteriostatic conformal coating and methods of application Patent
Development of bacteriostatic conformal coating and methods of applicatio
Asymptotic Exponential Arbitrage and Utility-based Asymptotic Arbitrage in Markovian Models of Financial Markets
Consider a discrete-time infinite horizon financial market model in which the
logarithm of the stock price is a time discretization of a stochastic
differential equation. Under conditions different from those given in a
previous paper of ours, we prove the existence of investment opportunities
producing an exponentially growing profit with probability tending to
geometrically fast. This is achieved using ergodic results on Markov chains and
tools of large deviations theory.
Furthermore, we discuss asymptotic arbitrage in the expected utility sense
and its relationship to the first part of the paper.Comment: Forthcoming in Acta Applicandae Mathematica
Time Series Modeling and Forecasting GDP in the Ghanaian Economy
In this research, empirical modeling of the Ghanaian GDP was done by using the Box-Jenkins model which is also known as the Autoregressive Integrated Moving Average model (ARIMA). We followed the 4 steps involved in using this model which include model identification, estimation of parameters, diagnostic checking and finally, model use (or forecasting). The analysis was carried out by using the GDP data of Ghana from 1970-2014. We found an original result by discovering an ARIMA (0; 1; 0) process modeling this GDP data. Next, we made forecast of the GDP of Ghana for the period 2015-2020 and compared the forecast values with that of Ghana Statistical service and other international forecasting organizations. The result from the forecast revealed that the GDP of Ghana is mostly influenced by external factors and may experience an increase for the period 2015-2020. Keywords: Gross Domestic Product (GDP), stationarity, invertibility, Box-Jenkins, auto-regressive
The CO/PC analogy in coordination chemistry and catalysis
9 pagesThis short account summarizes recent results obtained in the coordination chemistry of phosphinines and emphasizes their analogy with CO ligands. Reduced complexes can be easily assembled through the reaction of reduced 2,2'-biphosphinine dianions with transition metal fragments. Theoretical calculations were performed to establish the oxidation state of the metal in these complexes. Though many reduced complexes are available, phosphinines proved to be too sensitive toward nucleophiles to be used as efficient ligands in most catalytic processes. However, the high electrophilicity of the phosphorus atom can be exploited to synthesize phosphacylohexadienyl anions which exhibit a surprising coordination chemistry. When phosphino sulfide groups are incorporated as ancillary tridentate anionic SPS ligands can be easily produced. These ligands can bind different transition metal fragments such as M-X (M = group 10 metal, X = halogen), Rh-L (L = 2 electron donor ligand), Cu-X and Au-X (X = halogen). Palladium(II) complexes proved to be active catalyst in the Miyaura cross-coupling reaction. Bidentate anionic PS ligands were also synthesized following a similar approach. Their Pd(II) (allyl) derivatives showed a very good activity in the Suzuki catalyzed cross-coupling process that allows the synthesis of biphenyl derivatives through the reaction of phenylboronic acid with bromoarenes
Історія радянської України в бібліографічних покажчиках англомовних праць другої половини ХХ століття
У статті проаналізовано бібліографічні покажчики англомовної
слов’янознавчої та радянознавчої літератури, видрукувані в англомовних
країнах протягом другої половини ХХ ст. Зроблено спробу визначити
місце, яке у них займали праці з історії України, зокрема ті, що
стосуватися пізньосталінського та хрущовського періодів.В статье анализируются библиографические указатели англоязычной славяноведческой и советологической литературы, опубликованные в англоязычных странах во
второй половине ХХ века. Сделана попытка охарактеризовать положение, которое в
них занимала история Советской Украины, особенно ее позднесталинский и хрущевский
периоды.In the article, the bibliographic guides to the English-language publications in Slavic, East
European and Soviet Studies that were published in the second half of the 20th century are
analyzed. The special attention is given to history of Ukraine from the second half of the 1940s
till the mid-1960s as a particular subject in those guides
Expert nurses’ use of implicit memory in the care of patients with Alzheimer's disease
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/73899/1/j.1365-2648.2006.03864.x.pd
The detection of the imprint of filaments on cosmic microwave background lensing
Galaxy redshift surveys, such as 2dF, SDSS, 6df, GAMA and VIPERS, have shown
that the spatial distribution of matter forms a rich web, known as the cosmic
web. The majority of galaxy survey analyses measure the amplitude of galaxy
clustering as a function of scale, ignoring information beyond a small number
of summary statistics. Since the matter density field becomes highly
non-Gaussian as structure evolves under gravity, we expect other statistical
descriptions of the field to provide us with additional information. One way to
study the non-Gaussianity is to study filaments, which evolve non-linearly from
the initial density fluctuations produced in the primordial Universe. In our
study, we report the first detection of CMB (Cosmic Microwave Background)
lensing by filaments and we apply a null test to confirm our detection.
Furthermore, we propose a phenomenological model to interpret the detected
signal and we measure how filaments trace the matter distribution on large
scales through filament bias, which we measure to be around 1.5. Our study
provides a new scope to understand the environmental dependence of galaxy
formation. In the future, the joint analysis of lensing and Sunyaev-Zel'dovich
observations might reveal the properties of `missing baryons', the vast
majority of the gas which resides in the intergalactic medium and has so far
evaded most observations
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