On the Electrochemistry and Spectroelectrochemistry of Small Model Star-Shaped Compounds: 1,3,5-Triaryl-1-Methoxybenzenes and 2,4,6-Triaryl-1,3,5-Trimethoxybenzenes

ChemPhysChem ◽  
2012 ◽  
Vol 13 (9) ◽  
pp. 2322-2330 ◽  
Author(s):  
Peter Rapta ◽  
Vladimír Lukeš ◽  
Krzysztof R. Idzik ◽  
Rainer Beckert ◽  
Lothar Dunsch
Keyword(s):  
Model Star ◽  
Small Model

Small model languages as tools for reflection

2013 ◽  
Vol 1 (1) ◽  
Author(s):  
Paul Rastall
Keyword(s):  
Simple Model ◽  
Linguistic Analysis ◽  
Verbal Communication ◽  
Pedagogical Tools ◽  
Small Model

The paper presents a way of investigating verbal communication and examining assumptions about it independently of particular approaches to linguistic analysis through the development of imaginary language systems using very limited models (small model languages), identifying limitations, and finding ways to extend them. The imaginary systems are compared to real verbal phenomena to highlight communicational principles and show where questions arise. They can be pedagogical tools. A simple model is introduced as an example and ways of extending it are considered along with the questions that are raised in the process.

scholarly journals ARCIMBOLDOon coiled coils

2018 ◽  
Vol 74 (3) ◽  
pp. 194-204 ◽  
Author(s):  
Iracema Caballero ◽  
Massimo Sammito ◽  
Claudia Millán ◽  
Andrey Lebedev ◽  
Nicolas Soler ◽  
...  
Keyword(s):  
Coiled Coil ◽  
Coiled Coils ◽  
Translational Symmetry ◽  
Command Line ◽  
Phase Problem ◽  
Final Solution ◽  
Resolution Limit ◽  
Helical Structures ◽  
Small Model ◽  
Test Pool

ARCIMBOLDOsolves the phase problem by combining the location of small model fragments usingPhaserwith density modification and autotracing usingSHELXE. Mainly helical structures constitute favourable cases, which can be solved using polyalanine helical fragments as search models. Nevertheless, the solution of coiled-coil structures is often complicated by their anisotropic diffraction and apparent translational noncrystallographic symmetry. Long, straight helices have internal translational symmetry and their alignment in preferential directions gives rise to systematic overlap of Patterson vectors. This situation has to be differentiated from the translational symmetry relating different monomers.ARCIMBOLDO_LITEhas been run on single workstations on a test pool of 150 coiled-coil structures with 15–635 amino acids per asymmetric unit and with diffraction data resolutions of between 0.9 and 3.0 Å. The results have been used to identify and address specific issues when solving this class of structures usingARCIMBOLDO. Features fromPhaserv.2.7 onwards are essential to correct anisotropy and produce translation solutions that will pass the packing filters. As the resolution becomes worse than 2.3 Å, the helix direction may be reversed in the placed fragments. Differentiation between true solutions and pseudo-solutions, in which helix fragments were correctly positioned but in a reverse orientation, was found to be problematic at resolutions worse than 2.3 Å. Therefore, after every new fragment-placement round, complete or sparse combinations of helices in alternative directions are generated and evaluated. The final solution is once again probed by helix reversal, refinement and extension. To conclude, density modification andSHELXEautotracing incorporating helical constraints is also exploited to extend the resolution limit in the case of coiled coils and to enhance the identification of correct solutions. This study resulted in a specialized mode withinARCIMBOLDOfor the solution of coiled-coil structures, which overrides the resolution limit and can be invoked from the command line (keyword coiled_coil) orARCIMBOLDO_LITEtask interface inCCP4i.

scholarly journals Understanding the Effect of Ionic Liquid on the Folding and Conformation of Small Model Peptides

2011 ◽  
Vol 100 (3) ◽  
pp. 212a ◽  
Author(s):  
Jia Lin Huang ◽  
Karson Schmidt ◽  
Leigh Murray ◽  
Michael E. Noss ◽  
Michelle R. Bunagan
Keyword(s):  
Ionic Liquid ◽  
Small Model ◽  
Model Peptides

Radiative sublimation of a homogeneous, relativistic model star

1994 ◽  
Vol 37 (10) ◽  
pp. 925-928
Author(s):  
A. M. Baranov ◽  
N. N. Paklin
Keyword(s):  
Relativistic Model ◽  
Model Star

scholarly journals Marmoset invariant object recognition behavior mirrors that of humans and macaques at fine scale

2020 ◽  
Author(s):  
Alexander J.E. Kell ◽  
Sophie L. Bokor ◽  
You-Nah Jeon ◽  
Tahereh Toosi ◽  
Elias B. Issa
Keyword(s):  
Object Recognition ◽  
Model Organism ◽  
High Standard ◽  
Visual Object ◽  
Visual Object Recognition ◽  
Visual Neuroscience ◽  
Brain Functions ◽  
Invariant Object Recognition ◽  
Small Model ◽  
High Level

The marmoset—a small monkey with a flat cortex—offers powerful techniques for studying neural circuits in a primate. However, it remains unclear whether brain functions typically studied in larger primates can be studied in the marmoset. Here, we asked whether the 300-gram marmosets’ perceptual and cognitive repertoire approaches human levels or is instead closer to rodents’. Using high-level visual object recognition as a testbed, we found that on the same task marmosets substantially outperformed rats and generalized far more robustly across images, all while performing ∼1000 trials/day. We then compared marmosets against the high standard of human behavior. Across the same 400 images, marmosets’ image-by-image recognition behavior was strikingly human-like—essentially as human-like as macaques’. These results demonstrate that marmosets have been substantially underestimated and that high-level abilities have been conserved across simian primates. Consequently, marmosets are a potent small model organism for visual neuroscience, and perhaps beyond.

scholarly journals DEVELOPMENT MODEL FOR REMOVAL TOTAL IRON IN “GAMBUT WATER” FOR DRINKING WATER

2015 ◽  
Vol 1 (2) ◽  
pp. 170
Author(s):  
Sutrisno ◽  
Elizabeth Tjahjadarmawan ◽  
Fifi
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Optimum Condition ◽  
Aqueous Media ◽  
Analytical Techniques ◽  
Total Iron ◽  
Calcium Hypochlorite ◽  
Adsorption Technology ◽  
Adsorption Processes ◽  
Small Model

 ABSTRACT This research is focused on characterization of activated carbon from solid waste CPO industries and applying for treatments of gambut water for iron removal in aqueous media. Key parameters in the present study include TSS, DO, pH and total phenol is also determinated. Methods of sampling and analytical techniques for measuring key parameters are by using extended method. The small model has been developed by combining of the composting and adsorption technology.  The coagulant material such as filter alum, soda caustic, and calcium hypochlorite in any ratios are varied and the optimum condition is achieved. The activated carbon is used as adsorbent by using column model. The overall results show that after coagulation and adsorption processes the total iron, TSS, DO and pH are under threshold levels (Indonesian Regulation) and suitable for drinking water meanwhile other parameters are still uncovered in this investigation. Tentatively, it can be concluded that the proposed gambit water design has achieved the optimum condition. A further study on the improvement of the treatment design and service time for adsorption process is still in progress. Keywords : total iron, gambut water, activated carbon, combining model.

scholarly journals Hypothesis of Twin Deficits in Cote d’Ivoire: The Nonlinear Effect Analysis with a Smooth Transition Autoregression Model (STAR)

2020 ◽  
Vol 8 (1) ◽  
pp. 59
Author(s):  
GREKOU Gahié Lopez
Keyword(s):  
Current Account ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Smooth Transition ◽  
Budget Balance ◽  
Cote D’Ivoire ◽  
Effect Analysis ◽  
Côte D'ivoire ◽  
Model Star ◽  
Double Deficit

This paper tests the hypothesis of double deficit in Côte d'Ivoire in non-linear aid framework, using an autoregressive smooth transition model (STAR). The main results validate the hypothesis of double deficit in Côte d' Ivoire. The effect of current balance on budget balance is greater than budget balance on current balance. Moreover, the rapid effects of current account instability on fiscal balance reveal the lack of expectation by economic agents that leads to current account deterioration compared to the deterioration of budget balance.  Thus, economic policies aimed at influencing the effect on current balance would be more effective than those aimed at the effect on budget balance. In other words, Ivorian economy adopts a Keynesian performance in the event of current account shocks and performance that tend to be more or less Ricardian in presence of fiscal policy shock.

Small substructures and decidability issues for first-order logic with two variables

2012 ◽  
Vol 77 (3) ◽  
pp. 729-765 ◽  
Author(s):  
Emanuel Kieroński ◽  
Martin Otto
Keyword(s):  
Order Logic ◽  
First Order Logic ◽  
Equivalence Relations ◽  
Finite Model ◽  
Model Property ◽  
Finite Model Property ◽  
First Order ◽  
Surrounding Structure ◽  
Small Model ◽  
Exponential Size

AbstractWe study first-order logic with two variables FO2 and establish a small substructure property. Similar to the small model property for FO2 we obtain an exponential size bound on embedded substructures, relative to a fixed surrounding structure that may be infinite. We apply this technique to analyse the satisfiability problem for FO2 under constraints that require several binary relations to be interpreted as equivalence relations. With a single equivalence relation, FO2 has the finite model property and is complete for non-deterministic exponential time, just as for plain FO2. With two equivalence relations, FO2 does not have the finite model property, but is shown to be decidable via a construction of regular models that admit finite descriptions even though they may necessarily be infinite. For three or more equivalence relations, FO2 is undecidable.

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