782 research outputs found
Optimizing MACD Parameters via Genetic Algorithms for Soybean Futures
To create profits, traders must time the market correctly and enter and exit positions at ideal times. Finding the optimal time to enter the market can be quite daunting. The soybean market can be volatile and complex. Weather, sentiment, supply, and demand can all affect the price of soybeans. Traders typically use either fundamental analysis or technical analysis to predict the market for soybean futures\u27 contracts. Every agricultural future\u27s contract or security contract is different in its nature, volatility, and structure. Therefore, the purpose of this research is to optimize the moving average convergence divergence parameter values from traditionally used integers, to values that optimize the profit of the soybean market
The Effect of Corporate Support Programs on Employeesâ Innovative Behavior: A Cross-Cultural Study
This article establishes a theoretical model that sheds light on whether corporate support programs can foster employeesâ innovative behavior across nations and which national cultural dimensions moderate this relationship. To validate the arguments empirically, this research consists of two sequential, independent studies. The first study uses secondary data from the 2011 Global Entrepreneurship Monitor special report. Analysis of responses from 11,560 full-time employees in 13 countries shows that the relationship between support and innovative behavior is more positive when the nation's levels of power distance and masculinity are low and individualism is strong. A second experimental study is conducted in Germany and China using employeesâ individual behavior as the dependent variable and corporate support programs differentiated into three types of corporate support (providing time, providing budget, and providing advice) as the independent variable. Findings indicate that all three types of corporate support programs positively impact employeesâ innovative behavior in the sample from Germany, at least indirectly via feasibility and desirability judgments as mediators, but no significant relationships in the sample from China. This study contributes to the research stream on employeesâ innovative behavior and corporate support programs by adding national cultural properties as environmental factors. In addition, this study investigates the mediating effect of feasibility and desirability judgments between three types of corporate support programs and innovative behavior. This study also contributes to innovation research in general and to research on employeesâ innovative behavior in particular by building and validating a multilevel model empirically
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Comparison of transabdominal ultrasound and electromagnetic transponders for prostate localization.
The aim of this study is to compare two methodologies of prostate localization in a large cohort of patients. Daily prostate localization using B-mode ultrasound has been performed at the Nebraska Medical Center since 2000. More recently, a technology using electromagnetic transponders implanted within the prostate was introduced into our clinic (Calypso(R)). With each technology, patients were localized initially using skin marks. Localization error distributions were determined from offsets between the initial setup positions and those determined by ultrasound or Calypso. Ultrasound localization data was summarized from 16619 imaging sessions spanning 7 years; Calypso localization data consists of 1524 fractions in 41 prostate patients treated in the course of a clinical trial at five institutions and 640 localizations from the first 16 patients treated with our clinical system. Ultrasound and Calypso patients treated between March and September 2007 at the Nebraska Medical Center were analyzed and compared, allowing a single institutional comparison of the two technologies. In this group of patients, the isocenter determined by ultrasound-based localization is on average 5.3 mm posterior to that determined by Calypso, while the systematic and random errors and PTV margins calculated from the ultrasound localizations were 3 - 4 times smaller than those calculated from the Calypso localizations. Our study finds that there are systematic differences between Calypso and ultrasound for prostate localization
Selective metalâcomplexation on polymeric templates and their investigation via isothermal titration calorimetry
Selective complexation of metal ions represents a powerful tool for the development of versatile supramolecular architectures. While research in the field of molecular devices and machinery is sophisticated, the selective formation of metal complexes is not prevalent in polymer chemistry. Thus, the implementation of orthogonal binding concepts into a polymeric matrix is presented. In this context, an endâfunctionalized poly( N âisopropylacrylamide) (PNIPAm) carrying zincâporphyrin (ZnTPP) as well as a terpyridine (tpy) ligand side by side is utilized. With these binding sites, the polymer can simultaneously interact with a pyridine moiety via a ZnTPP interaction and a terpyridine unit by the formation of a bisâterpyridine complex. The complexation behavior of this polymer and different model compounds is intensively investigated by isothermal titration calorimetry. The obtained results indicate that the reported orthogonality of these two systems is successfully transferred into a functional polymeric architecture
Metallo-Supramolecular Complexation Behavior of Terpyridine- and Ferrocene-Based Polymers in SolutionâA Molecular Hydrodynamics Perspective
The contribution deals with the synthesis of the poly(methacrylate)-based copolymers, which contain ferrocene and/or terpyridine moieties in the side chains, and the subsequent analysis of their self-assembly behavior upon supramolecular/coordination interactions with Eu 3+ and Pd 2+ ions in dilute solutions. Both metal ions provoke intra and inter molecular complexation that results in the formation of large supra-macromolecular assembles of different conformation/shapes. By applying complementary analytical approaches (i.e., sedimentation-diffusion analysis in the analytical ultracentrifuge, dynamic light scattering, viscosity and density measurements, morphology studies by electron microscopy), a map of possible conformational states/shapes was drawn and the corresponding fundamental hydrodynamic and macromolecular characteristics of metallo-supramolecular assemblies at various ligand-to-ion molar concentration ratios ( M / L ) in extremely dilute polymer solutions ( c [ Ρ ] â 0.006 ) were determined. It was shown that intramolecular complexation is already detected at ( L â 0.1 ), while at M / L > 0.5 solution/suspension precipitates. Extreme aggregation/agglomeration behavior of such dilute polymer solutions at relatively âhighâ metal ion content is explained from the perspective of polymer-solvent and charge interactions that will accompany the intramolecular complexation due to the coordination interactions
Improved modelling of helium and tritium production for spallation targets
Reliable predictions of light charged particle production in spallation
reactions are important to correctly assess gas production in spallation
targets. In particular, the helium production yield is important for assessing
damage in the window separating the accelerator vacuum from a spallation
target, and tritium is a major contributor to the target radioactivity. Up to
now, the models available in the MCNPX transport code, including the widely
used default option Bertini-Dresner and the INCL4.2-ABLA combination of models,
were not able to correctly predict light charged particle yields. The work done
recently on both the intranuclear cascade model INCL4, in which cluster
emission through a coalescence process has been introduced, and on the
de-excitation model ABLA allows correcting these deficiencies. This paper shows
that the coalescence emission plays an important role in the tritium and
production and that the combination of the newly developed versions of the
codes, INCL4.5-ABLA07, now lead to good predictions of both helium and tritium
cross sections over a wide incident energy range. Comparisons with other
available models are also presented.Comment: 6 pages, 9 figure
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