scholarly journals Maryborough, a new H5 meteorite find from Victoria, Australia

2019 ◽  
Vol 131 (1) ◽  
pp. 18
Author(s):  
William D. Birch ◽  
Dermot A. Henry ◽  
Andrew G. Tomkins
Keyword(s):  
Iron Oxide ◽  
Ordinary Chondrite ◽  
The Third ◽  
The Matrix ◽  
Terrestrial Age

The Maryborough meteorite is a new H5 ordinary chondrite discovered about 2 km south of Maryborough, Victoria, in May 2015. It is a single stone measuring approximately 39 × 14 × 14 cm and with a mass of 17 kg. Plentiful indistinct chondrules are up to 1 mm across in a strongly recrystallised plagioclase-bearing matrix. Olivine and orthopyroxene in both the matrix and chondrules are uniform in composition (Fo80.1Fa19.3Te0.5Ca-ol0.04 and En81.5Fs17.1Wo1.5 respectively).The main metallic phases present are kamacite, taenite and tetrataenite, often forming composite grains with troilite. There is no evidence for any shock-inducing event and the meteorite shows incipient weathering in the form of thin iron-oxide mantles around the Fe–Ni grains. A terrestrial age of less than 1000 years is estimated from C14 dating. While there are a number of historic reported meteor sightings in the Maryborough district, none can be tied to the meteorite’s find site. To date, Maryborough is the third H5 ordinary chondrite and the second largest single chondritic mass, after Kulnine (55 kg), found in Victoria.

scholarly journals Thermoluminescence as a technique for determining the nature and history of small solar system particles

2011 ◽  
Vol 38 (3) ◽  
pp. 272-281
Author(s):  
Jonathan Craig ◽  
Derek Sears
Keyword(s):  
Solar System ◽  
Radiation Dosimetry ◽  
Ordinary Chondrite ◽  
Small Particles ◽  
Fundamental Properties ◽  
Metamorphic History ◽  
The Matrix ◽  
History Of ◽  
Terrestrial Age

Abstract The thermoluminescence phenomenon has been used for pottery dating and radiation dosimetry for sixty years and for forty years has been applied to the study of meteorites, being successful in quantifying metamorphic histories and providing new insights into terrestrial age and orbits. Here we review some of the fundamental properties of thermoluminescence with particular focus on the study of small extraterrestrial particles. We suggest that natural TL data can be used to identify the burial and release history of cometary particles and that induced TL measurements can provide in-sights into the mineralogy of particles (even when largely amorphous) and the metamorphic history of those particles. We illustrate the use of TL to study small particles by describing recent studies on micrometeorites and 10–100 μm fragments taken from the matrix of a meteorite Semarkona which is type 3.0 ordinary chondrite.

Alternaria toxins and their effects on host plants

1995 ◽  
Vol 73 (S1) ◽  
pp. 453-458 ◽  
Author(s):  
Hiroshi Otani ◽  
Keisuke Kohmoto ◽  
Motoichiro Kodama
Keyword(s):  
Plasma Membrane ◽  
Host Plants ◽  
Plasma Membranes ◽  
Early Effect ◽  
The Third ◽  
The Matrix ◽  
Electrolyte Loss ◽  
Host Specific Toxins ◽  
Acid Structure ◽  
Malate Oxidation

There are now nine or more Alternaria pathogens that produce host-specific toxins, and the structures of most of the toxins have been elucidated. Alternaria host-specific toxins are classified in three groups in terms of the primary site action. ACT-, AF-, and AK-toxins have in common an epoxy-decatrienoic acid structure and exert their primary effect on the plasma membrane of susceptible cells. A rapid increase in electrolyte loss from tissues and invaginations in the plasma membranes are common effects of these toxins. The second group is represented by ACR(L)-toxin, which induces changes in mitochondria, including swelling, vesiculation of cristae, decrease in the electron density of the matrix, increase in the rate of NADH oxidation, and inhibition of malate oxidation. The third group consists of AM-toxin, which appears to exert an early effect on both chloroplasts and plasma membranes. AM-toxin induces vesiculation of grana lamellae, inhibition of CO2 fixation, invagination of plasma membranes, and electrolyte loss. The roles of host-specific toxins in pathogenesis are discussed. Key words: Alternaria, host-specific toxin, plasma membrane, mitochondrion, chloroplast.

scholarly journals HILL CIPHER ON SHAMIR’S THREE PASS PROTOCOL

2017 ◽  
Author(s):  
hasdiana
Keyword(s):  
Matrix Element ◽  
Execution Time ◽  
Invertible Matrix ◽  
Multidisciplinary Research ◽  
The Third ◽  
Xor Operation ◽  
Hill Cipher ◽  
The Matrix ◽  
Level Of Difficulty ◽  
Time Required

This preprint has been presented in the 3rd International Conference on Multidisciplinary Research, Medan, october 16 – 18, 2014---In this study the authors use the scheme of Shamir's Three Pass Protocol for Hill Cipher operation. Scheme of Shamir's Three Pass Protocol is an attractive scheme that allows senders and receivers to communicate without the key exchange. Hill Cipher is chosen because of the key-shaped matrix, which is expected to complicate the various techniques of cryptanalyst. The results of this study indicate that the weakness of the scheme of Shamir's Three Pass Protocol for XOR operation is not fully valid if it is used for Hill Cipher operations. Cryptanalyst can utilize only the third ciphertext that invertible. Matrix transpose techniques in the ciphertext aims to difficulties in solving this algorithm. The original ciphertext generated in each process is different from the transmitted ciphertext. The level of difficulty increases due to the use of larger key matrix. The amount of time required for the execution of the program depends on the length of the plaintext and the value of the matrix element. Plaintext has the same length produce different execution time depending on the value of the key elements of the matrix used.

From random matrices to random tensors

2021 ◽  
pp. 166-177
Author(s):  
Adrian Tanasa
Keyword(s):  
Matrix Models ◽  
Random Matrices ◽  
Mathematical Physics ◽  
Natural Generalization ◽  
Random Surface ◽  
The Third ◽  
Planar Surfaces ◽  
Tensor Models ◽  
Feynman Graphs ◽  
The Matrix

After a brief presentation of random matrices as a random surface QFT approach to 2D quantum gravity, we focus on two crucial mathematical physics results: the implementation of the large N limit (N being here the size of the matrix) and of the double-scaling mechanism for matrix models. It is worth emphasizing that, in the large N limit, it is the planar surfaces which dominate. In the third section of the chapter we introduce tensor models, seen as a natural generalization, in dimension higher than two, of matrix models. The last section of the chapter presents a potential generalisation of the Bollobás–Riordan polynomial for tensor graphs (which are the Feynman graphs of the perturbative expansion of QFT tensor models).

Asymmetric Merge and Parataxis

2008 ◽  
Vol 53 (2-3) ◽  
pp. 355-385
Author(s):  
Mark de Vries
Keyword(s):  
Syntactic Structure ◽  
Precedence Relation ◽  
The Third ◽  
The Matrix ◽  
The Asymmetry

AbstractI argue that syntactic structure encodes three types of asymmetries. The first corresponds to the asymmetry between mother and daughters nodes that is called dominance, that is, syntactic hierarchy. The second is the selectional asymmetry between sister nodes, which is translated into the precedence relation in the phonological component. The third, called behindance, is an alternative to dominance, and corresponds to parataxis. Parenthesis, coordination, and apposition are analyzed on the basis of behindance. In our derivational model of grammar it is defined as a special type of inclusion that blocks c-command. It follows that parenthetic material can neither move toward the matrix, nor be bound by a constituent from the matrix.

The Effect of Iron Oxide on the Mechanical and Ageing Properties of Y-TZP Ceramic

2016 ◽  
Vol 701 ◽  
pp. 225-229 ◽  
Author(s):  
Sivanesan Sivakumar ◽  
Hsien Loong Teow ◽  
Ramesh Singh ◽  
Ali Niakan ◽  
Nobuyuki Mase
Keyword(s):  
Fracture Toughness ◽  
Iron Oxide ◽  
Bulk Density ◽  
Phase Stability ◽  
Vickers Hardness ◽  
Tetragonal Phase ◽  
Superheated Steam ◽  
Matrix Stiffness ◽  
Sintering Aid ◽  
The Matrix

A small amount of iron oxide (Fe2O3) was added to the commercially available 3 mol% Y-TZP as a sintering aid over a temperature range of 1250°C to 1500°C. Sintered samples were then evaluated to determine the bulk density, Vickers hardness, and fracture toughness. In addition, hydrothermal ageing experiments to determine the tetragonal phase stability were performed on selected sintered samples in superheated steam at 180°C / 10 bar for up to 24 hours. Based on the work carried out, it was revealed that additions of Fe2O3 particularly 0.3 wt% was indeed beneficial in aiding densification, improving the matrix stiffness and hardness when compared to undoped Y-TZP sintered at temperatures below 1350°C. Addition of Fe2O3 was found to have negligible effects on the fracture toughness of all samples with the exception of the 0.5 and 1 wt% doped Y-YZP sintered above 1400°C. Hydrothermal ageing resistance of Y-TZP was found to be enhanced with the addition of Fe2O3 in the Y-TZP matrix.

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.

scholarly journals Fassbinder’s formula. A revolution depicted is a real one aborted.

2021 ◽  
Author(s):  
Camille Akmut
Keyword(s):  
Comparative Analysis ◽  
Third Generation ◽  
The Third ◽  
The Matrix

Fassbinder’s principle of not showing successful revolutions on screen in orderto incite real ones, is established. Internal examples from his own oeuvre arereferenced : Fox and his Friends (1975) and The Third Generation in particularare discussed. External examples follow as part of a comparative analysis. [The,contemporaneously transparent, background for this article is The Matrix 4’srelease.]

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