scholarly journals A supramolecular proposal of lignin structure and its relation with the wood properties

2009 ◽  
Vol 81 (1) ◽  
pp. 137-142 ◽  
Author(s):  
Heber S. Abreu ◽  
João V.F. Latorraca ◽  
Regina P.W. Pereira ◽  
Maria Beatriz O. Monteiro ◽  
Fábio A. Abreu ◽  
...  
Keyword(s):  
Wood Properties ◽  
The Other ◽  
Virtual Model ◽  
Structure Form ◽  
Wood Technology ◽  
Model Based ◽  
Other Hand ◽  
Science Discussion ◽  
The Matrix ◽  
Matrix Compound

In spite of the great importance of cellulose the lignin is considered the second most abundant substance of the wood. However, little attention has been given it, mainly to wood properties. The lignin as well as other structural compounds (cellulose and hemicelluloses), has obviously an important role on the wood properties, probably due its composition and existent bonds. In general lignins have β-O-4 (Alkyl Aril Ether) as majoritary bond. This bond in a continued structure form big molecules with spiral conformation as virtual model. Based on this idea, lignins that have high/low β-O-4 content may have differentiated spiraled structures,suggesting different behaviors on the wood properties,which shows that the lignins (Guaicyl:Syringyl (GS)) of angiosperms, for example, which have higher β-O-4 content would present higher spiral conformation than gymnosperms lignins(HG). On the other hand HG lignins have chance of being more anchored on the matrix compound than GS lignins. In this context, the β-O-4 bonds of lignins possibly affect the wood properties, therefore, it is considered relevant for wood technology science discussion.

Adverbial clauses and V3

2019 ◽  
Vol 5 (s3) ◽  
Author(s):  
Eva Csipak
Keyword(s):  
Word Order ◽  
Speech Act ◽  
The Other ◽  
Order Effects ◽  
Matrix Clause ◽  
Other Hand ◽  
Pragmatic Analysis ◽  
The Matrix ◽  
Adverbial Clauses ◽  
Biscuit Conditionals

AbstractThis paper discusses word order effects in German adverbial clauses: often, the matrix clause can exhibit either V2 or V3 word order. I argue that adverbial clauses with V3 word order have an obligatory ‘biscuit’ interpretation and receive a speech act modifying interpretation, as has previously only been argued for ‘biscuit conditionals’. I show that this phenomenon holds more generally. On the other hand, a pragmatic analysis for V2 biscuit conditionals remains necessary.

scholarly journals Thermo-Mechanical Fatigue of Grey Cast Iron for Cylinder Heads - Effect of Niobium, Molybdenum and Solidification Time

2018 ◽  
Vol 925 ◽  
pp. 377-384 ◽  
Author(s):  
Peter Skoglund ◽  
Jessica Elfsberg ◽  
Nulifer Ipek ◽  
Lucian Vasile Diaconu ◽  
Mari Larsson ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Cyclic Stress ◽  
The Other ◽  
Solidification Time ◽  
Alloying Elements ◽  
Static Properties ◽  
Mechanical Fatigue ◽  
Other Hand ◽  
The Matrix ◽  
Grey Cast

Grey iron alloyed with molybdenum and niobium in seven different compositions has been casted using three, in industrial components viable, solidification times which resulted in 21 different samples. The samples have been investigated with respect to microstructure, static properties and thermo-mechanical fatigue performance. It was found that the solidification time is very important for both the static and thermo-mechanical performance. If the solidification time is long the properties are controlled entirely by the large graphite flakes and there is no influence of the alloying elements. On the other hand if the solidification time can be kept short the need for alloying elements may be removed. For the shorter solidification times an influence from the matrix and thus the alloying elements can be seen. It was found that molybdenum enhances TMF-life while no such effect was found for niobium. Niobium, on the other hand, has a larger effect on static strength than molybdenum and also on the cyclic stress in the thermo-mechanical fatigue experiments.

scholarly journals Hidden Ekphrasis in the Works of Miroslav Krleža

2017 ◽  
Vol 11 (1) ◽  
pp. 118-133
Author(s):  
Nataša Lah
Keyword(s):  
Social Context ◽  
Art History ◽  
The Other ◽  
Literary Texts ◽  
Other Hand ◽  
Mise En Scene ◽  
The Matrix ◽  
Miroslav Krleza ◽  
The Rich ◽  
The One

Throughout the entire literary oeuvre of Miroslav Krleža we are faced with a great number of credible descriptions, describing real historic events, or real artists and artworks belonging to the rich resources of European art history. By applying a cryptographic method of incorporating descriptions into his texts, Krleža on the one hand hid his sources, while on the other also revealed them. He hid them in the tissue of fictional texts, and unmasked them using a key work only those familiar with the source could identify. We term this method the use of “belletristic cryptograms”, and can further categorise it into thematic subgroups of concealed artwork descriptions, naming this whole method the use of hidden ekphrasis. The choice of artworks Krleža describes in his work is comprehensive, diverse and each described differently. Since we are dealing with literary texts, descriptions are often used in the function of a wide array of interpretative strategies of depiction; in some aspects, they are used as a mere glimpse into a piece of art with the goal of visually associating, evoking or minutely symbolizing the incorporeal frame of an artist’s mind or of the wider social context. In other aspects, the artworks are richly and meticulously presented with regard to their importance and credibility as they, according to Krleža, possess an “ethical intelligence” and “ethical conscience”. Only Krleža’s prose is researched here, and this is done on two levels. We take a look at examples where real art is incorporated into fictional texts in order to determine the significance and meaning of a certain dialogue, mise-en-scène or situation. This is most commonly found in the author’s plays, novels and novellas. On the other hand, we can trace a completely opposite method by which artworks enter these texts, where, due to their historic determination and already established worth/status, they thus re-enter reality, as seen from the perspective of Krleža’s life and work, so as to yet again test art history’s credibility through the matrix of contemporaneity. This approach is most often found in Krleža’s essays, critiques and diary entries.

scholarly journals Organology of Dreams and Archi-Cinema (

2016 ◽  
Vol 24 (47) ◽  
Author(s):  
Stiegler Bernard
Keyword(s):  
The Other ◽  
The Unconscious ◽  
The Third ◽  
Other Hand ◽  
The Matrix ◽  
History Of ◽  
Cinematic Time ◽  
The One

Stiegler argued in Cinematic Time and the Question of Malaise (the third volume of Technics and Time) that we must refer to archi-cinema just as Derrida spoke of archi-writing. In this article he proposes that in principle the dream is the primordial form of this archi-cinema. The archi-cinema of consciousness, of which dreams would be the matrix as archi-cinema of the unconscious, is the projection resulting from the play between what Husserl called, on the one hand, primary and secondary retentions, and what Stiegler, on the other hand, calls tertiary retentions, which are the hypomnesic traces (that is, the mnemo-technical traces) of conscious and unconscious life. There is archi-cinema to the extent that for any noetic act – for example, in an act of perception – consciousness projects its object. This projection is a montage, of which tertiary (hypomnesic) retentions form the fabric, as well as constituting both the supports and the cutting room. This indicates that archi-cinema has a history, a history conditioned by the history of tertiary retentions. It also means that there is an organology of dreams.

Note on a problem of Porte

1968 ◽  
Vol 64 (1) ◽  
pp. 1-1 ◽  
Author(s):  
George Rousseau
Keyword(s):  
Propositional Calculus ◽  
The Other ◽  
Characteristic Matrix ◽  
Finite Characteristic ◽  
Other Hand ◽  
Intuitionistic Propositional Calculus ◽  
The Matrix ◽  
Image Position

Porte (1), p. 117, conjectures that the positive implicational propositional calculus has no finite characteristic matrix. The proof of this conjecture is a straightforward modification of Gödel's proof (2) that the intuitionistic propositional calculus has no finite characteristic matrix (see e.g. Church(3), ex. 26.12). Writing (A ∨ B) for ((A ⊃ B) ⊃ B) and Xij for (pj ⊃ pi) (i, j = 1,2,…), we define, for n > l, the formulawhere the terms associate to the left. Since provable formulae take the value n for all systems of values of the variables in the matrix {1,…,n} where x ⊃ y is n when x ≤ y and y otherwise, whereas Gn takes the value n − 1 for the system of values pi = i (i = 1,…,n), it follows that Gn is not provable. On the other hand, since A ⊢ A ∨ B and B ⊢ A ∨ B, it is easily seen that is provable whenever r ≠ s (r, s = 1,…,n). The result follows from these two remarks.

scholarly journals Hidden Ekphrasis in the Works of Miroslav Krleža

2017 ◽  
Vol 11 (1) ◽  
pp. 118-133
Author(s):  
Nataša Lah
Keyword(s):  
Social Context ◽  
Art History ◽  
The Other ◽  
Literary Texts ◽  
Other Hand ◽  
Mise En Scene ◽  
The Matrix ◽  
Miroslav Krleza ◽  
The Rich ◽  
The One

Throughout the entire literary oeuvre of Miroslav Krleža we are faced with a great number of credible descriptions, describing real historic events, or real artists and artworks belonging to the rich resources of European art history. By applying a cryptographic method of incorporating descriptions into his texts, Krleža on the one hand hid his sources, while on the other also revealed them. He hid them in the tissue of fictional texts, and unmasked them using a key work only those familiar with the source could identify. We term this method the use of “belletristic cryptograms”, and can further categorise it into thematic subgroups of concealed artwork descriptions, naming this whole method the use of hidden ekphrasis. The choice of artworks Krleža describes in his work is comprehensive, diverse and each described differently. Since we are dealing with literary texts, descriptions are often used in the function of a wide array of interpretative strategies of depiction; in some aspects, they are used as a mere glimpse into a piece of art with the goal of visually associating, evoking or minutely symbolizing the incorporeal frame of an artist’s mind or of the wider social context. In other aspects, the artworks are richly and meticulously presented with regard to their importance and credibility as they, according to Krleža, possess an “ethical intelligence” and “ethical conscience”. Only Krleža’s prose is researched here, and this is done on two levels. We take a look at examples where real art is incorporated into fictional texts in order to determine the significance and meaning of a certain dialogue, mise-en-scène or situation. This is most commonly found in the author’s plays, novels and novellas. On the other hand, we can trace a completely opposite method by which artworks enter these texts, where, due to their historic determination and already established worth/status, they thus re-enter reality, as seen from the perspective of Krleža’s life and work, so as to yet again test art history’s credibility through the matrix of contemporaneity. This approach is most often found in Krleža’s essays, critiques and diary entries.

scholarly journals On Sign Pattern Matrices that Allow or Require Algebraic Positivity

2019 ◽  
Vol 35 ◽  
pp. 331-356
Author(s):  
Diane Christine Pelejo ◽  
Jean Leonardo Abagat
Keyword(s):  
The Other ◽  
Necessary Condition ◽  
Sign Pattern ◽  
Real Polynomial ◽  
Positive Matrix ◽  
Open Problems ◽  
Other Hand ◽  
The Matrix ◽  
Pattern Matrix ◽  
Square Matrix

A square matrix M with real entries is algebraically positive (AP) if there exists a real polynomial p such that all entries of the matrix p(M) are positive. A square sign pattern matrix S allows algebraic positivity if there is an algebraically positive matrix M whose sign pattern is S. On the other hand, S requires algebraic positivity if matrix M, having sign pattern S, is algebraically positive. Motivated by open problems raised in a work of Kirkland, Qiao, and Zhan (2016) on AP matrices, all nonequivalent irreducible 3 by 3 sign pattern matrices are listed and classify into three groups (i) those that require AP, (ii) those that allow but not require AP, or (iii) those that do not allow AP. A necessary condition for an irreducible n by n sign pattern to allow algebraic positivity is also provided.

scholarly journals The “Rosetta Stone” for deciphering the anatomy of the stem turtle Condorchelys antiqua (Early-Middle Jurassic; Chubut, Argentina)

2015 ◽  
Author(s):  
Juliana Sterli ◽  
Marcelo de la Fuente ◽  
Guillermo Rougier
Keyword(s):  
Middle Jurassic ◽  
Cladistic Analysis ◽  
The Other ◽  
Phylogenetic Position ◽  
Thoracic Vertebrae ◽  
Direct Observations ◽  
Other Hand ◽  
New Information ◽  
The Matrix ◽  
Postcranial Remains

Background. Condorchelys antiqua is a stem turtle previously described from the Queso Rallado Locality, Cañadón Asfalto Formation (Early-Middle Jurassic), Chubut, Argentina. In 2014 a skull (MPEF-PV 10900) and an articulated shell with associated postcranial remains (MPEF-PV 10884) of C. antiqua were discovered in the mentioned locality. Methods. The new specimens have been prepared by L. Reiner (technician at the Museo Egidio Feruglio) and then studied using the regular paleontological methodology (e.g., direct observations and under the microscope, photography, and drawings). The new data provided by these two specimens, plus some other isolated remains that were re-prepared, allowed us to score a 25% more of the characters of C. antiqua in the most complete up to date matrix for Mesozoic turtles. The matrix was build in Mesquite and analyzed under maximum parsimony in TNT. We performed two rounds of Tree Bisection Reconnection and calculated a strict consensus. Branch supports were provided using bootstrap, jackknife, and Bremer support. Results. We regard the specimen MPEF-PV 10900 as represented by the basicranium and some previously unknown skull bones like the maxilla, frontal, parietal, and postorbital. This specimen also shows that there were no teeth in the pterygoid of C. antiqua. On the other hand, specimen MPEF-PV 10884 is an almost complete carapace and plastron with 4 thoracic vertebrae and ribs, scapular and pelvic girdles, humerus, left radius, femur, tibia, fibula, 2 metatarsal/carpals, 2 phalanges, 1 ungual phalanx and 1 chevron bone. The preliminary cladistic analysis resulted in 750 most parsimonious trees of 893 steps. The result of the analysis corroborates the position of C. antiqua as a stem turtle more derived than the Triassic and Australochelys africanus. Condorchelys antiqua is recovered in a polytomy together with other early-middle Jurassic turtles (e.g., Kayentachelys aprix and Indochelys spatulata) and the clade formed by the remaining turtles. Discussion. Although many new characters have been scored for C. antiqua in the phylogenetic analysis, this new information did not resolved the phylogenetic position for this taxon. We consider that more information about I. spatulata and K. aprix could help to better understand the relationships among these basal taxa. On the other hand, these new specimens of C. antiqua bring valuable information to decipher the anatomy of the poorly known non-shell postcranial elements of these Early to Middle Jurassic stem turtles. In light of the recently suggested aquatic preferences of C. antiqua, the next step on this research would be to explore other adaptations to the aquatic environment using postcranial elements, particularly the limb bones.

Participation of Women in Logistics Through Innovation

2018 ◽  
Vol 3 (2) ◽  
pp. 32-52 ◽  
Author(s):  
María J. García ◽  
Gilberto J. Hernández ◽  
José G. G. Hernández
Keyword(s):  
The Other ◽  
Research Use ◽  
Close Attention ◽  
Female Participation ◽  
Business Logistics ◽  
Model Based ◽  
Other Hand ◽  
Participation Of Women ◽  
Manage Innovation ◽  
Innovation Processes

This article relates relevant aspects of business: logistics, innovation, female participation and multicriteria models. One issue that is paying close attention is the participation of women in different social spheres, including business. On the other hand, logistics is related to practically all areas of an organization, which can be visualized, when studying it supported, in the Logistics Model Based on Positions (MoLoBaC). There are other models that interest this work, such as multicriteria models, in particular the multiattribute models with multiplicative factors (MMcFm). Also, companies maintain and prosper thanks to their ability to manage innovation. The confluence of these four fields of knowledge generates the general objective of this research: Use of the different areas of the logistics model based on positions to measure, through a multiattribute model, the female participation in logistics, having as a thread the innovation processes.

scholarly journals Improvements in Aggregate-Paste Interface by the Hydration of Steelmaking Waste in Concretes and Mortars

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1147 ◽  
Author(s):  
Isabel Miñano ◽  
Francisco Benito ◽  
Manuel Valcuende ◽  
Carlos Rodríguez ◽  
Carlos Parra
Keyword(s):  
Mechanical Properties ◽  
Chemical Interaction ◽  
Raw Materials ◽  
The Other ◽  
Reaction Products ◽  
Hydrated Calcium Silicate ◽  
Limestone Aggregate ◽  
Other Hand ◽  
The Matrix ◽  
New Compounds

The objective of the experimental work is to study the mechanical properties in self-compacting concretes (SCC) in which part of the limestone aggregate has been replaced by granulated blast furnace slag (GBFS) in different percentages ranging from 0% to 60%. The results show that at early ages the SCC with the largest content in slag tend to have lower compressive strengths due to the poor compacting of the aggregates, although in the long-term their strength increases due to the reactivity of the slag. In fact, at the age of 365 days, the mortars made with the substitution of 50% of cement by ground GBFS reach compressive strength similar to that of the mortar made with 100% of cement. The consumption of calcium hydroxide during the hydration of the GBFS and the formation of hydrated calcium silicate (CSH) improve the mechanical properties of the slag-paste interface. The new compounds formed by the hydration of anhydrous oxides of the GBFS improve the aggregate-paste transition zone. The chemical interaction between the dissolution of the cement pore and the GBFS ends up generating new compounds on its surface. The increasing hydration of the GBFS produces a greater amount of silica gel that polymerises, densifying the matrix and reducing the porosity, which improves the mechanical properties of the concrete and perhaps its durability. The topography of the particles and their interface are analysed with atomic force microscopy techniques to assess the morphology depending on the aggregate used. On the other hand, a study was carried out of the aggregate-paste interface with scanning electronic microscope at different ages. It can be seen that in the contours of the hydrated GBFS particles, a band or ring forms with the new reaction products. The results obtained strengthen the previous conclusions. The new hydrated compounds fill the reaction ring, introducing chemical bonds between the aggregate and the interface, occupying part of the original pores or substituting spaces occupied originally by large portlandite crystals, of lesser mechanical strength and easily leached. For all this, the benefit is twofold. On the one hand, use is made of industrial by-products and, on the other hand, part of the destruction of natural quarries to obtain the necessary raw materials is avoided.

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