Templatic metathesis in Tigre imperatives

Phonology ◽  
2014 ◽  
Vol 31 (2) ◽  
pp. 209-227 ◽  
Author(s):  
Noam Faust
Keyword(s):  

In the paradigms of certain Tigre verbs, the final stem consonant and the vocalic suffix metathesise in some configurations. In this short paper, this is analysed as a hiatus-resolving strategy. The limits and consequences of this strategy are shown to follow from the representation of verbs, in an analysis conducted within CVCV phonology and Element Theory.

2017 ◽  
Vol 38 (1) ◽  
Author(s):  
Noam Faust

AbstractIn Nuer, a Western Nilotic language, a productive process of vowel mutation lowers certain vowels in the plural forms of reduplicated adjectives, while others remain unaltered. Sometimes, lowering is accompanied by diphthongization. This short paper asks what determines which vowels should lower, which should also undergo diphthongization and which should remain unaltered. The phenomenon is analyzed within Element Theory in which vocalic expressions are decomposed into a head element and a dependent element. A pre-specified, Semitic-type template is proposed alongside a constraint on Head Preservation. These two tools derive the entire set of attested and unattested mutations. It is then shown that the analysis can pave the way for a better understanding of other, similar vowel mutation processes in Nuer.


Author(s):  
Patrick Echlin

The unusual title of this short paper and its accompanying tutorial is deliberate, because the intent is to investigate the effectiveness of low temperature microscopy and analysis as one of the more significant elements of the less interventionist procedures we can use to prepare, examine and analyse hydrated and organic materials in high energy beam instruments. The promises offered by all these procedures are well rehearsed and the litany of petitions and responses may be enunciated in the following mantra.Vitrified water can form the perfect embedding medium for bio-organic samples.Frozen samples provide an important, but not exclusive, milieu for the in situ sub-cellular analysis of the dissolved ions and electrolytes whose activities are central to living processes.The rapid conversion of liquids to solids provides a means of arresting dynamic processes and permits resolution of the time resolved interactions between water and suspended and dissolved materials.The low temperature environment necessary for cryomicroscopy and analysis, diminish, but alas do not prevent, the deleterious side effects of ionizing radiation.Sample contamination is virtually eliminated.


Author(s):  
Araceli Bonifant ◽  
Misha Lyubich ◽  
Scott Sutherland

John Milnor, best known for his work in differential topology, K-theory, and dynamical systems, is one of only three mathematicians to have won the Fields medal, the Abel prize, and the Wolf prize, and is the only one to have received all three of the Leroy P. Steele prizes. In honor of his eightieth birthday, this book gathers together surveys and papers inspired by Milnor's work, from distinguished experts examining not only holomorphic dynamics in one and several variables, but also differential geometry, entropy theory, and combinatorial group theory. The book contains the last paper written by William Thurston, as well as a short paper by John Milnor himself. Introductory sections put the papers in mathematical and historical perspective, color figures are included, and an index facilitates browsing.


2018 ◽  
Author(s):  
Matthew J. Bolton
Keyword(s):  

A short paper on social attitudes in the American weather enterprise, accepted for publication in the July 2018 newsletter of the National Weather Association.


2019 ◽  
Author(s):  
Lea Barbett ◽  
Edward Stupple ◽  
Michael Sweet ◽  
Miles Richardson

The planet is facing an anthropogenic mass extinction of wildlife, which will have a grave impact on the environment and humans. Widespread human action is needed to minimize the negative impact of humans on biodiversity and support the restoration of wildlife. In order to find effective ways to promote pro-nature conservation behaviours to the general population, there is a need to provide a list of behaviours which will have worthwhile ecological impact and are worth encouraging. In a novel collaboration between psychologists and ecologists, 70 experts from practical and academic conservation backgrounds were asked to review and rate 48 conservation related behaviours. According to their judgement, this short paper presents a ranked list of pro-nature conservation behaviours for the public in the UK and similar landscapes. This includes behaviours people can engage in in their homes, their gardens, on their land, and in their roles as citizens.


2020 ◽  
Vol 53 (9) ◽  
pp. 161-167
Author(s):  
Jácome Cunha ◽  
Mihai Dan ◽  
Martin Erwig ◽  
Danila Fedorin ◽  
Alex Grejuc
Keyword(s):  

Aerospace ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 183
Author(s):  
Yongjie Liu ◽  
Yu Jiang ◽  
Hengnian Li ◽  
Hui Zhang

This paper intends to show some special types of orbits around Jupiter based on the mean element theory, including stationary orbits, sun-synchronous orbits, orbits at the critical inclination, and repeating ground track orbits. A gravity model concerning only the perturbations of J2 and J4 terms is used here. Compared with special orbits around the Earth, the orbit dynamics differ greatly: (1) There do not exist longitude drifts on stationary orbits due to non-spherical gravity since only J2 and J4 terms are taken into account in the gravity model. All points on stationary orbits are degenerate equilibrium points. Moreover, the satellite will oscillate in the radial and North-South directions after a sufficiently small perturbation of stationary orbits. (2) The inclinations of sun-synchronous orbits are always bigger than 90 degrees, but smaller than those for satellites around the Earth. (3) The critical inclinations are no-longer independent of the semi-major axis and eccentricity of the orbits. The results show that if the eccentricity is small, the critical inclinations will decrease as the altitudes of orbits increase; if the eccentricity is larger, the critical inclinations will increase as the altitudes of orbits increase. (4) The inclinations of repeating ground track orbits are monotonically increasing rapidly with respect to the altitudes of orbits.


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