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Journal articles on the topic 'Ascent sequences'

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Author: Grafiati

Published: 10 March 2023

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1

Mansour, Toufik, and Mark Shattuck. "Ascent sequences and Fibonacci numbers." Filomat 29, no. 4 (2015): 703–12. http://dx.doi.org/10.2298/fil1504703m.

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An ascent sequence is one consisting of non-negative integers in which the size of each letter is restricted by the number of ascents preceding it in the sequence. Ascent sequences have recently been shown to be related to (2+2)-free posets and a variety of other combinatorial structures. Let Fn denote the Fibonacci sequence given by the recurrence Fn = Fn-1 + Fn-2 if n ? 2, with F0 = 0 and F1 = 1. In this paper, we draw connections between ascent sequences and the Fibonacci numbers by showing that several pattern-avoidance classes of ascent sequences are enumerated by either Fn+1 or F2n-1. We make use of both algebraic and combinatorial methods to establish our results. In one of the apparently more difficult cases, we make use of the kernel method to solve a functional equation and thus determine the distribution of some statistics on the avoidance class in question. In two other cases, we adapt the scanning-elements algorithm, a technique which has been used in the enumeration of certain classes of pattern-avoiding permutations, to the comparable problem concerning pattern-avoiding ascent sequences.

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2

Callan, David, Toufik Mansour, and Mark Shattuck. "Restricted ascent sequences and Catalan numbers." Applicable Analysis and Discrete Mathematics 8, no. 2 (2014): 288–303. http://dx.doi.org/10.2298/aadm140626007c.

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In this paper, we identify all members of the (4,4)-Wilf equivalence class for ascent sequences corresponding to the Catalan number Cn = 1 / n+1 (2n/n). This extends recent work concerning avoidance of a single pattern and provides apparently new combinatorial interpretations for Cn. In several cases, the subset of the class consisting of those members having exactly m ascents is given by the Narayana number Nn;m+1 = 1 / n (n/m+1)(n/m). We conclude by considering a further refinement in the case of avoiding 021.

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3

Ying, Changtian, and Jiong Yu. "An operator on ascent sequences." Wuhan University Journal of Natural Sciences 19, no. 4 (August 2014): 289–94. http://dx.doi.org/10.1007/s11859-014-1015-3.

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4

Kitaev, Sergey, and Jeffrey B. Remmel. "A note on $p$-ascent sequences." Journal of Combinatorics 8, no. 3 (2017): 487–506. http://dx.doi.org/10.4310/joc.2017.v8.n3.a5.

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5

Mansour, Toufik, and Mark Shattuck. "Some enumerative results related to ascent sequences." Discrete Mathematics 315-316 (February 2014): 29–41. http://dx.doi.org/10.1016/j.disc.2013.10.006.

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6

Yan, Sherry H. F. "Ascent sequences and 3-nonnesting set partitions." European Journal of Combinatorics 39 (July 2014): 80–94. http://dx.doi.org/10.1016/j.ejc.2013.12.007.

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7

Lin, Zhicong, and Shishuo Fu. "On 12̲0-avoiding inversion and ascent sequences." European Journal of Combinatorics 93 (March 2021): 103282. http://dx.doi.org/10.1016/j.ejc.2020.103282.

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8

Bényi, Beáta, Anders Claesson, and Mark Dukes. "Weak ascent sequences and related combinatorial structures." European Journal of Combinatorics 108 (February 2023): 103633. http://dx.doi.org/10.1016/j.ejc.2022.103633.

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9

Yan, Sherry H. F. "Bijections for inversion sequences, ascent sequences and 3-nonnesting set partitions." Applied Mathematics and Computation 325 (May 2018): 24–30. http://dx.doi.org/10.1016/j.amc.2017.12.021.

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10

Todorčević, Stevo, and Víctor Torres Pérez. "Rado's Conjecture and Ascent Paths of Square Sequences." Mathematical Logic Quarterly 60, no. 1-2 (February 2014): 84–90. http://dx.doi.org/10.1002/malq.201300006.

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11

Lin, Zhicong. "Patterns of relation triples in inversion and ascent sequences." Theoretical Computer Science 804 (January 2020): 115–25. http://dx.doi.org/10.1016/j.tcs.2019.11.007.

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12

Grunenfelder, Luzius, and Matjaž Omladič. "Ascent and descent for finite sequences of commuting endomorphisms." Pacific Journal of Mathematics 191, no. 1 (November 1, 1999): 95–121. http://dx.doi.org/10.2140/pjm.1999.191.95.

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13

Bousquet-Mélou, Mireille, Anders Claesson, Mark Dukes, and Sergey Kitaev. "(2+2)-free posets, ascent sequences and pattern avoiding permutations." Journal of Combinatorial Theory, Series A 117, no. 7 (October 2010): 884–909. http://dx.doi.org/10.1016/j.jcta.2009.12.007.

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14

Fu, Shishuo, Emma Yu Jin, Zhicong Lin, Sherry H. F. Yan, and Robin D. P. Zhou. "A new decomposition of ascent sequences and Euler–Stirling statistics." Journal of Combinatorial Theory, Series A 170 (February 2020): 105141. http://dx.doi.org/10.1016/j.jcta.2019.105141.

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15

Rowland, Benjamin, and Jonathan A. Jones. "Implementing quantum logic gates with gradient ascent pulse engineering: principles and practicalities." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 370, no. 1976 (October 13, 2012): 4636–50. http://dx.doi.org/10.1098/rsta.2011.0361.

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We briefly describe the use of gradient ascent pulse engineering (GRAPE) pulses to implement quantum logic gates in nuclear magnetic resonance quantum computers, and discuss a range of simple extensions to the core technique. We then consider a range of difficulties that can arise in practical implementations of GRAPE sequences, reflecting non-idealities in the experimental systems used.

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16

Kiss, L. L., and T. R. Bedding. "Red variables in the OGLE-II database: first results for the LMC." International Astronomical Union Colloquium 193 (2004): 55–59. http://dx.doi.org/10.1017/s0252921100010332.

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AbstractWe present a period analysis of more then 23 000 red giants in the Large Magellanic Cloud observed by the OGLE-II microlensing project. Periods combined with the single-epoch 2MASS J H KS magnitudes revealed the complex distributions of stars in the period-luminosity plane. Besides four different sequences corresponding to different modes of pulsation in AGB stars, we also discovered two distinct and well-separated sequences below the tip of the Red Giant Branch, consisting of almost 10000 short-period and low-amplitude red variable stars. We propose that the majority are likely to be first ascent red giants, showing radial pulsations in the second and third overtone modes.

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17

McCallum, Clinton. "Falling Up." Journal of Popular Music Studies 33, no. 2 (June 1, 2021): 99–129. http://dx.doi.org/10.1525/jpms.2021.33.2.99.

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This article investigates melodic figures and harmonic sequences that miraculously only step up to illuminate an aesthetic lineage that connects gospel to electronic dance music. It argues that the synth-risers and ever-opening filters of contemporary euphoric rave music like happy-hardcore and uplifting-trance find precedence in compositional devices that made their way into funk/soul and disco/garage from Black gospel music, and that these gospel inventions were derived from the Afro-diasporic ring-shout. Cognitive linguistic and psychoacoustic theories premise an analytical framework for musical representations of endless ascent. Through close readings of representative recordings—a 1927 Pentecostal sermon by Reverend Sister Mary Nelson, James Cleveland’s “Peace Be Still,” Chic’s “Le Freak,” Trussel’s “Love Injection,” and DJ Hixxy’s remix of Paradise's “I See the Light”—the article examines various historical intersections with parlour music, European art music, and modal jazz, and suggests that musical ascent has a non-causal but, nevertheless, objective relationship with a type of spiritual transcendence.

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18

Khaneja, Navin, Timo Reiss, Cindie Kehlet, Thomas Schulte-Herbrüggen, and Steffen J. Glaser. "Optimal control of coupled spin dynamics: design of NMR pulse sequences by gradient ascent algorithms." Journal of Magnetic Resonance 172, no. 2 (February 2005): 296–305. http://dx.doi.org/10.1016/j.jmr.2004.11.004.

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19

Dukes, Mark, and Peter R. W. McNamara. "Refining the bijections among ascent sequences, (2+2)-free posets, integer matrices and pattern-avoiding permutations." Journal of Combinatorial Theory, Series A 167 (October 2019): 403–30. http://dx.doi.org/10.1016/j.jcta.2019.05.007.

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20

M, Padma Mike Putri. "Game Edukasi Pembeljaran Menghitung Susunan Angka Pada Puzzle-8 Menggunakan Metode Steepest Ascent Hill Climbing." Building of Informatics, Technology and Science (BITS) 3, no. 3 (December 31, 2021): 148–54. http://dx.doi.org/10.47065/bits.v3i3.1015.

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Learning games are games that are very much in the interest of preschool children today in carrying out activities because basically, this game playing uses the term play while learning, this game is very useful in brain development for preschool children to increase thinking data in sharpening the brain, this game consists of 8 sequences of numbers that are not sequentially arranged into consecutive numbers to become Puzzled -8 guided by the concept of the rules in the algorithm. The problem, in this case, is the children's lack of interest in learning to count and compile numbers because it is difficult to understand. With the learning game, the aim of this research is to help early childhood children in calculating the sequence of numbers that are usually difficult to understand. This game can be used as a game arena but contains elements of learning and compiling puzzle numbers 8. The method used uses the Ascent Hill Climbing Algorithm which is the process of The work of this algorithm that can produce a regular array of numbers by using the concept of shifting the value of numbers according to the existing rules in the Steepest Ascent Hill Climbing Method algorithm.

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21

Bertram, Jason, and Joanna Masel. "Evolution Rapidly Optimizes Stability and Aggregation in Lattice Proteins Despite Pervasive Landscape Valleys and Mazes." Genetics 214, no. 4 (February 27, 2020): 1047–57. http://dx.doi.org/10.1534/genetics.120.302815.

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The “fitness” landscapes of genetic sequences are characterized by high dimensionality and “ruggedness” due to sign epistasis. Ascending from low to high fitness on such landscapes can be difficult because adaptive trajectories get stuck at low-fitness local peaks. Compounding matters, recent theoretical arguments have proposed that extremely long, winding adaptive paths may be required to reach even local peaks: a “maze-like” landscape topography. The extent to which peaks and mazes shape the mode and tempo of evolution is poorly understood, due to empirical limitations and the abstractness of many landscape models. We explore the prevalence, scale, and evolutionary consequences of landscape mazes in a biophysically grounded computational model of protein evolution that captures the “frustration” between “stability” and aggregation propensity. Our stability-aggregation landscape exhibits extensive sign epistasis and local peaks galore. Although this frequently obstructs adaptive ascent to high fitness and virtually eliminates reproducibility of evolutionary outcomes, many adaptive paths do successfully complete the ascent from low to high fitness, with hydrophobicity a critical mediator of success. These successful paths exhibit maze-like properties on a global landscape scale, in which taking an indirect path helps to avoid low-fitness local peaks. This delicate balance of “hard but possible” adaptation could occur more broadly in other biological settings where competing interactions and frustration are important.

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22

Manning, D. A. C., and D. W. Strutt. "Metallogenetic significance of a North Pennine springwater." Mineralogical Magazine 54, no. 377 (December 1990): 629–36. http://dx.doi.org/10.1180/minmag.1990.054.377.16.

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AbstractThe occurrence is reported of a saline spring water from Weardale, which compositionally closely resembles other saline waters derived from the Carnmenellis granite, southwest England. The total dissolved solutes achieve approximately 38 000 mg/L, and alkali geothermometers suggest equilibration temperatures of approximately 150°C, equivalent to a depth of 4 km. Using Na, K and Li it is possible to compare the composition of the spring water with those of other spring waters derived from Carboniferous sequences adjacent to the North Pennine Orefield and with published data for fluid inclusions from North Pennine fluorite. These compositional parameters suggest that the ancient mineralizing fluids resemble modern Carboniferous sediment-derived waters and contain a relatively minor component of granite-derived water. Data for Br and Cl indicate that a significant component of the present day Weardale spring waters was probably ultimately derived from organic-rich sedimentary sequences while data for K, Na and Li indicate the importance of a component derived from a permeable granite aquifer. The Weardale springwaters continue to have ‘mineralizing’ potential, in view of the possibility that they may have precipitated quartz or chalcedony during their ascent.

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23

Chiodini, G., C. Cardellini, F. Di Luccio, J. Selva, F. Frondini, S. Caliro, A. Rosiello, G. Beddini, and G. Ventura. "Correlation between tectonic CO2 Earth degassing and seismicity is revealed by a 10-year record in the Apennines, Italy." Science Advances 6, no. 35 (August 2020): eabc2938. http://dx.doi.org/10.1126/sciadv.abc2938.

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Deep CO2 emissions characterize many nonvolcanic, seismically active regions worldwide, and the involvement of deep CO2 in the earthquake cycle is now generally recognized. However, no long-time records of such emissions have been published, and the temporal relations between earthquake occurrence and tectonic CO2 release remain enigmatic. Here, we report a 10-year record (2009–2018) of tectonic CO2 flux in the Apennines (Italy) during intense seismicity. The gas emission correlates with the evolution of the seismic sequences: Peaks in the deep CO2 flux are observed in periods of high seismicity and decays as the energy and number of earthquakes decrease. We propose that the evolution of seismicity is modulated by the ascent of CO2 accumulated in crustal reservoirs and originating from the melting of subducted carbonates. This large-scale, continuous process of CO2 production favors the formation of overpressurized CO2-rich reservoirs potentially able to trigger earthquakes at crustal depth.

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24

Frost, Carol D., Benjamin L. Fruchey, Kevin R. Chamberlain, and B. Ronald Frost. "Archean crustal growth by lateral accretion of juvenile supracrustal belts in the south-central Wyoming Province." Canadian Journal of Earth Sciences 43, no. 10 (October 1, 2006): 1533–55. http://dx.doi.org/10.1139/e06-092.

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Neoarchean supracrustal sequences in the south-central Wyoming Province are exposed as relatively small belts in Laramide uplifts. Some sequences are composed of materials derived mainly from pre-existing Wyoming province crust, but others are dominated by juvenile components. The latter include the Miners Delight Formation in the Wind River Range, the Rattlesnake Hills Group in the Granite Mountains, and the Bradley Peak succession in the Seminoe Mountains. U–Pb zircon dates from interbedded metavolcanic rocks suggest that these supracrustal belts are of at least two different ages: ca. 2.67 and ca. 2.72 Ga. We identify a time of contractional deformation and accretion of some of these supracrustal packages to the southern Wyoming Province at ~2.65–2.63 Ga. Magmatism is nearly synchronous with deformation. Some granitoids intrude the Wyoming Province basement, as well as the juvenile rocks thrust onto this basement; these have Nd isotopic compositions indicating that these plutons assimilated some old continental basement during ascent. Plutons intruding the supracrustal rocks located farther from the margin do not show this continental influence. The time scale and geologic processes of deposition, contractional deformation, and plutonism appear analogous to Phanerozoic examples of oceanic terrane accretion, such as formed the Klamath Mountains Province of California and Oregon. We conclude that a major episode of Neoarchean crustal growth involved both the lateral accretion of juvenile terranes and the intrusion of arc magmas formed from mantle-derived and (or) juvenile crustal sources and was driven by geologic processes very similar to modern plate tectonics.

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25

Martin, A. R., and T. G. Smith. "Strategy and capability of wild belugas, Delphinapterus leucas, during deep, benthic diving." Canadian Journal of Zoology 77, no. 11 (December 1, 1999): 1783–93. http://dx.doi.org/10.1139/z99-129.

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The diving capability and behavioural strategy of wild belugas or white whales (Delphinapterus leucas) was investigated during periods of sustained deep diving. Analysis was limited to dives with a "square" time-depth profile, the most common type of deep dive, which invariably reached the seabed. As water depth increased, whales partially compensated for the greater commuting distance by increasing dive duration and rates of descent and ascent. But time at the target depth (bottom time) still diminished as depth increased. The duration of a dive was independent of the surface intervals preceding and following it. The aerobic dive limit of wild adult belugas probably exceeds the submergence times (mean 13.1 min, maximum 22.9 min) routinely recorded in this study. Belugas extended the duration of dives after slow descents, so bottom time was not reduced, substantiating the impression that they were not working at their physiological limit during sequences of deep dives. Larger belugas dived for longer and had lower rates of vertical travel. For their body size, belugas have average diving capability compared with other odontocetes but perform poorly compared with pinnipeds. Belugas are much larger than sympatric pinniped competitors, however, so they dive for longer and have unique access to deeper benthic resources.

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26

Sagoo, Ravjit S., Charles E. Hutchinson, Alex Wright, Charles Handford, Helen Parsons, Victoria Sherwood, Sarah Wayte, et al. "Magnetic Resonance investigation into the mechanisms involved in the development of high-altitude cerebral edema." Journal of Cerebral Blood Flow & Metabolism 37, no. 1 (July 20, 2016): 319–31. http://dx.doi.org/10.1177/0271678x15625350.

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Rapid ascent to high altitude commonly results in acute mountain sickness, and on occasion potentially fatal high-altitude cerebral edema. The exact pathophysiological mechanisms behind these syndromes remain to be determined. We report a study in which 12 subjects were exposed to a FiO2 = 0.12 for 22 h and underwent serial magnetic resonance imaging sequences to enable measurement of middle cerebral artery velocity, flow and diameter, and brain parenchymal, cerebrospinal fluid and cerebral venous volumes. Ten subjects completed 22 h and most developed symptoms of acute mountain sickness (mean Lake Louise Score 5.4; p < 0.001 vs. baseline). Cerebral oxygen delivery was maintained by an increase in middle cerebral artery velocity and diameter (first 6 h). There appeared to be venocompression at the level of the small, deep cerebral veins (116 cm3 at 2 h to 97 cm3 at 22 h; p < 0.05). Brain white matter volume increased over the 22-h period (574 ml to 587 ml; p < 0.001) and correlated with cumulative Lake Louise scores at 22 h ( p < 0.05). We conclude that cerebral oxygen delivery was maintained by increased arterial inflow and this preceded the development of cerebral edema. Venous outflow restriction appeared to play a contributory role in the formation of cerebral edema, a novel feature that has not been observed previously.

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27

Gannier, Alexandre, Estelle Petiau, Violaine Dulau, and Luke Rendell. "Foraging dives of sperm whales in the north-western Mediterranean Sea." Journal of the Marine Biological Association of the United Kingdom 92, no. 8 (August 31, 2012): 1799–808. http://dx.doi.org/10.1017/s0025315412001087.

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Oceanic odontocetes rely on echolocation to forage on pelagic or benthic prey, but their feeding ecology is difficult to study. We studied sperm whale foraging dives during summer in the north-western Mediterranean, using visual and passive acoustic observations. Clicking and creaking activities were recorded during dives of focal whales, at distances <3000 m using a towed hydrophone and DAT recorder. A total of 52 sperm whales were recorded over at least one full dive cycle. Data were obtained for 156 complete dives in total, including sequences of up to nine consecutive dives. Various dive and environmental variables were entered in multiple linear regression and principal components analysis, as well as estimated mass of whales. Creak rate was 0.80 creak/minute on average, with moderate variance. Bigger whales tended to dive longer at greater depths (as suggested by ascent durations), and emitted more creaks during a dive: 20.2 creaks/dive on average for individuals <24 tons, compared to 25.6 creaks/dive for animals >24 tons of estimated mass. For individual whales, creak rates did not vary significantly with size (range 0.78–0.80 creak/minute), but decreased with time of the day, and increased for shorter foraging phases. For different dives, higher creak rates were also observed earlier in the day, and linked to shorter foraging phases and surface durations. Although the exact significance of creak emissions (i.e. foraging attempt or prey capture) is not precisely determined, creak rates may be reliably used to quantify sperm whale foraging when single animal dives can be followed acoustically.

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28

MEYER, G. B., T. GRENNE, and R. B. PEDERSEN. "Age and tectonic setting of the Nesåa Batholith: implications for Ordovician arc development in the Caledonides of Central Norway." Geological Magazine 140, no. 5 (September 2003): 573–94. http://dx.doi.org/10.1017/s0016756803008069.

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New U–Pb zircon dating yields a crystallization age of 458±3 Ma for the largely gabbroic Grøndalsfjell Intrusive Complex in the Gjersvik Nappe of the Caledonian Upper Allochthon in Scandinavia. This is identical, within error, to the age of the adjacent Møklevatnet Complex that is dominated by quartz monzodiorite (456±2 Ma), and the two intrusive suites may be regarded as members of a composite intrusion here referred to as the Nesåa Batholith. Mafic members of this calc-alkaline batholith are characterized by slightly positive εNd–εSr values, marked enrichment of the light rare earth elements and high Th/Yb ratios suggestive of a subduction-modified mantle source. The I-type granitoids have similar isotope values and highly fractionated rare earth element patterns, and are interpreted as products from partial melting of garnet-bearing mafic rocks. The Nesåa Batholith intruded a previously deformed, 483 Ma or older, metavolcanic sequence of oceanic arc affinity. The margins of the pluton show evidence for synkinematic emplacement, which is tentatively interpreted in terms of magma ascent controlled by deep-seated shear zones. Further uplift and exhumation of the crystallized plutons was followed by rapid deposition of batholith-derived conglomerates and arkoses in a marginal basin represented by the Limingen Group. The age of the Nesåa Batholith fills the gap in reported ages for Caledonian magmatism, between the Early to Middle Ordovician, oceanic to continental margin type, arc sequences of Laurentian palaeotectonic affinity, and the Late Ordovician–Early Silurian batholith complexes of interpreted Laurentian margin affinity. It is interpreted as an early phase of the more extensive plutonism recorded in the Bindal Batholith of the Uppermost Allochthon to the west. Our model implies that the Early Ordovician oceanic arc sequences of the Gjersvik Nappe were deformed and accreted on to Laurentian margin lithologies prior to Late Ordovician times. This composite crustal assemblage was the source for the voluminous quartz monzodioritic intrusions of the Nesåa Batholith, which formed by partial melting due to ponding of subduction-related mantle derived mafic magmas either within or at the base of the active continental margin.

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29

ZANON, VITTORIO. "Geology and volcanology of San Venanzo volcanic field (Umbria, Central Italy)." Geological Magazine 142, no. 6 (November 2005): 683–98. http://dx.doi.org/10.1017/s0016756805001470.

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The purpose of this paper is to integrate, or even modify where necessary, the geo-volcanological setting outlined by other authors on the history of the small volcanic field of San Venanzo (Umbria, Central Italy). To attain this goal, new accurate field investigations were carried out in that area, coupled with detailed stratigraphic studies and laboratory analyses, to support field evidence with experimental results. The first objective was to stress the importance of a groundwater reservoir whose interaction with magma at various degrees was responsible not only for the explosive character of volcanism in that area, but also for the complex morphology of the volcanic deposits that are widely scattered on the underlying sedimentary basement. Another objective was to clarify the role played by tectonic activity in enhancing the fast and discontinuous ascent of batches of magma from the mantle to the surface, through two different sets of faults, opened by tectonic unrest into the crust, that were also responsible for the morphology and spatial distribution of volcanic centres. This was considered to be very important in consideration of the still-active stress field of the region. Finally, special attention was focused on the presence of a palaeosol between two eruptive sequences, as it most likely denoted a split in the volcanic activity of this site into two separate phases. This observation leads to the conclusion that, in spite of its eruptive characteristics, the small volcano of San Venanzo is not monogenic. For all of these topics, a number of conclusions have been drawn and they are reported with more data in the following sections of this paper.

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30

Whattam, Scott A., John W. Shervais, Mark K. Reagan, Daniel A. Coulthard, Julian A. Pearce, Peter Jones, Jieun Seo, et al. "Mineral compositions and thermobarometry of basalts and boninites recovered during IODP Expedition 352 to the Bonin forearc." American Mineralogist 105, no. 10 (October 1, 2020): 1490–507. http://dx.doi.org/10.2138/am-2020-6640.

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Abstract Central aims of IODP Expedition 352 were to delineate and characterize the magmatic stratigraphy in the Bonin forearc to define key magmatic processes associated with subduction initiation and their potential links to ophiolites. Expedition 352 penetrated 1.2 km of magmatic basement at four sites and recovered three principal lithologies: tholeiitic forearc basalt (FAB), high-Mg andesite, and boninite, with subordinate andesite. Boninites are subdivided into basaltic, low-Si, and high-Si varieties. The purpose of this study is to determine conditions of crystal growth and differentiation for Expedition 352 lavas and compare and contrast these conditions with those recorded in lavas from mid-ocean ridges, forearcs, and ophiolites. Cr# (cationic Cr/Cr+Al) vs. TiO2 relations in spinel and clinopyroxene demonstrate a trend of source depletion with time for the Expedition 352 forearc basalt to boninite sequence that is similar to sequences in the Oman and other suprasubduction zone ophiolites. Clinopyroxene thermobarometry results indicate that FAB crystallized at temperatures (1142–1190 °C) within the range of MORB (1133–1240 °C). When taking into consideration liquid lines of descent of boninite, orthopyroxene barometry and olivine thermometry of Expedition 352 boninites demonstrate that they crystallized at temperatures marginally lower than those of FAB, between ~1119 and ~1202 °C and at relatively lower pressure (~0.2–0.4 vs. 0.5–4.6 kbar for FAB). Elevated temperatures of boninite orthopyroxene (~1214 °C for low-Si boninite and 1231–1264 °C for high-Si boninite) may suggest latent heat produced by the rapid crystallization of orthopyroxene. The lower pressure of crystallization of the boninite may be explained by their lower density and hence higher ascent rate, and shorter distance of travel from place of magma formation to site of crystallization, which allowed the more buoyant and faster ascending boninites to rise to shallower levels before crystallizing, thus preserving their high temperatures.

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Sandeman, H. A., B. L. Cousens, and C. J. Hemmingway. "Continental tholeiitic mafic rocks of the Paleoproterozoic Hurwitz Group, Central Hearne sub-domain, Nunavut: insight into the evolution of the Hearne sub-continental lithosphere." Canadian Journal of Earth Sciences 40, no. 9 (September 1, 2003): 1219–37. http://dx.doi.org/10.1139/e03-035.

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The Paleoproterozoic Hurwitz Group of the western Churchill Province is an erosional remnant of an areally extensive, predominantly shallow-water intracratonic basin comprised of four major sequences. Sequence 2, forming the central part of the stratigraphy, contains the Ameto Formation, a sequence of pillowed and massive basaltic rocks and associated gabbro sills termed the Happotiyik Member that are interlayered with subordinate deep-water mudstones, siltstones, and diamictites. Whole-rock geochemical data for the mafic rocks reveals a suite of homogeneous tholeiitic basalts with affinities to both continental and volcanic-arc tholeiites. Compatible trace elements and large-ion lithophile elements exhibit scattered behavior, whereas all high field strength elements show a systematic increase with Zr. The rocks are large-ion lithophile and light rare-earth element enriched, and have parallel primitive mantle normalized extended trace element patterns with prominent negative Nb, Ta, and Ti anomalies. εNd(t=2200 Ma) values for the rocks range from 0.0 to +0.8. The data indicate that the parental magmas were derived from a heterogeneous, predominantly depleted mantle source that included a minor metasomatically enriched component. Contamination by Neoarchean, juvenile silicic upper crust during ascent was minimal. We envisage that the rocks of the Happotiyik Member were generated from sub-continental lithospheric mantle that was stabilized immediately after formation of the ca. 2680 Ma, Neoarchean Central Hearne sub-domain. This enrichment occurred via metasomatic infiltration of subduction-derived fluids and melts into the overlying lithosphere. A wide range of Paleoproterozoic intra-continental mafic rocks in the western Churchill Province exhibit comparable geochemical and isotopic signatures that suggest an origin in the lithospheric mantle. These observations imply that the Hearne sub-continental lithospheric mantle has endured since the Neoarchean and likely persists today.

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Coetzee, A., and A. F. M. Kisters. "Spatial variations of sills and implications for magma dispersal across the Karoo basin." South African Journal of Geology 123, no. 4 (October 26, 2020): 511–30. http://dx.doi.org/10.25131/sajg.123.0035.

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Abstract Dolerite sill complexes of the Karoo Large Igneous Province (ca. 183 Ma) show systematic variations in emplacement style and size throughout the Karoo basin. These variations are explained in terms of three main, interrelated factors, namely the overburden thickness or emplacement depth, variations in host rock rigidities as a result of sedimentary facies changes in the Karoo basin, and proximity to magma feeders. In the northern parts of the thinner (<500 m) and more coarse-clastic Karoo stratigraphy, sills intrude preferentially below more rigid sandstone horizons that acted as stress barriers causing the arrest of magma ascent and lateral spreading below sandstone beds. The low overburden promotes roof uplift above sills and associated brittle faulting can initiate the formation of inclined sheets that limits the lateral propagation path of inner sills. Roof uplift is further promoted by the proximity to magma feeders in the basement and resulting variations in magma pressure that control the spreading rate and inflation of sills. Localised dyke networks spaced at regular intervals and rooted in underlying sills reflect the stretching of roof rocks above inflating sills. The combination of these effects results in relatively small (<10 km) diameters of sills in the northern parts of the basin. Sills emplaced at intermediate depths (ca. 700 m) in the central Karoo basin are marked by larger diameters (>30 km) and thicknesses of up to 100 m. This reflects the higher overburden pressures and the delay of roof failure and subsequent formation of inclined sheets. Dyke networks in the roof of these sills become more irregular and non-systematic at these greater depths. At even greater depths of up to 2 km in the southern parts of the Karoo basin, mega-sills reach diameters of 50 to 80 km, but thicknesses of only up to 35 m. Thick shale-rich sequences in the southern Karoo basin facilitate sill emplacement through internal host-rock deformation and ductile flow. The thicker overburden and different host rock rigidity delay or suppress roof failure and formation of inclined sheet, thus allowing for the lateral propagation of sills. The deeper-seated sills are typically not associated with local dyke networks.

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Belgrano, Thomas M., Larryn W. Diamond, Yves Vogt, Andrea R. Biedermann, Samuel A. Gilgen, and Khalid Al-Tobi. "A revised map of volcanic units in the Oman ophiolite: insights into the architecture of an oceanic proto-arc volcanic sequence." Solid Earth 10, no. 4 (July 29, 2019): 1181–217. http://dx.doi.org/10.5194/se-10-1181-2019.

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Abstract. Numerous studies have revealed genetic similarities between Tethyan ophiolites and oceanic “proto-arc” sequences formed above nascent subduction zones. The Semail ophiolite (Oman–U.A.E.) in particular can be viewed as an analogue for this proto-arc crust. Though proto-arc magmatism and the mechanisms of subduction initiation are of great interest, insight is difficult to gain from drilling and limited surface outcrops in marine settings. In contrast, the 3–5 km thick upper-crustal succession of the Semail ophiolite, which is exposed in an oblique cross section, presents an opportunity to assess the architecture and volumes of different volcanic rocks that form during the proto-arc stage. To determine the distribution of the volcanic rocks and to aid exploration for the volcanogenic massive sulfide (VMS) deposits that they host, we have remapped the volcanic units of the Semail ophiolite by integrating new field observations, geochemical analyses, and geophysical interpretations with pre-existing geological maps. By linking the major-element compositions of the volcanic units to rock magnetic properties, we were able to use aeromagnetic data to infer the extension of each outcropping unit below sedimentary cover, resulting in a new map showing 2100 km2 of upper-crustal bedrock. Whereas earlier maps distinguished two main volcanostratigraphic units, we have distinguished four, recording the progression from early spreading-axis basalts (Geotimes), through axial to off-axial depleted basalts (Lasail), to post-axial tholeiites (Tholeiitic Alley), and finally boninites (Boninitic Alley). Geotimes (“Phase 1”) axial dykes and lavas make up ∼55 vol % of the Semail upper crust, whereas post-axial (“Phase 2”) lavas constitute the remaining ∼45 vol % and ubiquitously cover the underlying axial crust. Highly depleted boninitic members of the Lasail unit locally occur within and directly atop the axial sequence, marking an earlier onset of boninitic magmatism than previously known for the ophiolite. The vast majority of the Semail boninites, however, belong to the Boninitic Alley unit and occur as discontinuous accumulations up to 2 km thick at the top of the ophiolite sequence and constitute ∼15 vol % of the upper crust. The new map provides a basis for targeted exploration of the gold-bearing VMS deposits hosted by these boninites. The thickest boninite accumulations occur in the Fizh block, where magma ascent occurred along crustal-scale faults that are connected to shear zones in the underlying mantle rocks, which in turn are associated with economic chromitite deposits. Locating major boninite feeder zones may thus be an indirect means to explore for chromitites in the underlying mantle.

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Druitt, T. H., R. A. Mellors, D. M. Pyle, and R. S. J. Sparks. "Explosive volcanism on Santorini, Greece." Geological Magazine 126, no. 2 (March 1989): 95–126. http://dx.doi.org/10.1017/s0016756800006270.

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AbstrctSantorini volcanic field has had 12 major (1–10 km3 or more of magma), and numerous minor, explosive eruptions over the last ~ 200 ka. Deposits from these eruptions (Thera Pyroclastic Formation) are well exposed in caldera-wall successions up to 200 m thick. Each of the major eruptions began with a pumice-fall phase, and most culminated with emplacement of pyroclastic flows. Pyroclastic flows of at least six eruptions deposited proximal lag deposits exposed widely in the caldera wall. The lag deposits include coarse-grained lithic breccias (andesitic to rhyodacitic eruptions) and spatter agglomerates (andesitic eruptions only). Facies associations between lithic breccia, spatter agglomerate, and ignimbrite from the same eruption can be very complex. For some eruptions, lag deposits provide the only evidence for pyroclastic flows, because most of the ignimbrite is buried on the lower flanks of Santorini or under the sea. At least eight eruptions tapped compositionally heterogeneous magma chambers, producing deposits with a range of zoning patterns and compositional gaps. Three eruptions display a silicic–silicic + mafic–silicic zoning not previously reported. Four eruptions vented large volumes of dacitic or rhyodacitic pumice, and may account for 90% or more of all silicic magma discharged from Santorini. The Thera Pyroclastic Formation and coeval lavas record two major mafic-to-silicic cycles of Santorini volcanism. Each cycle commenced with explosive eruptions of andesite or dacite, accompanied by construction of composite shields and stratocones, and culminated in a pair of major dacitic or rhyodacitic eruptions. Sequences of scoria and ash deposits occur between most of the twelve major members and record repeated stratocone or shield construction following a large explosive eruption.Volcanism at Santorini has focussed on a deep NE–SW basement fracture, which has acted as a pathway for magma ascent. At least four major explosive eruptions began at a vent complex on this fracture. Composite volcanoes constructed north of the fracture were dissected by at least three caldera-collapse events associated with the pyroclastic eruptions. Southern Santorini consists of pryoclastic ejecta draped over a pre-volcanic island and a ridge of early- to mid-Pleistocene volcanics. The southern half of the present-day caldera basin is a long-lived, essentially non-volcanic, depression, defined by topographic highs to the south and east, but deepened by subsidence associated with the main northern caldera complex, and is probably not a separate caldera.

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Chen, Joanna N., and Zhicong Lin. "Combinatorics of the symmetries of ascents in restricted inversion sequences." Advances in Applied Mathematics 143 (February 2023): 102449. http://dx.doi.org/10.1016/j.aam.2022.102449.

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Weeks, Amy M., James R. Byrnes, Irene Lui, and James A. Wells. "Mapping proteolytic neo-N termini at the surface of living cells." Proceedings of the National Academy of Sciences 118, no. 8 (February 3, 2021): e2018809118. http://dx.doi.org/10.1073/pnas.2018809118.

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N terminomics is a powerful strategy for profiling proteolytic neo-N termini, but its application to cell surface proteolysis has been limited by the low relative abundance of plasma membrane proteins. Here we apply plasma membrane-targeted subtiligase variants (subtiligase-TM) to efficiently and specifically capture cell surface N termini in live cells. Using this approach, we sequenced 807 cell surface N termini and quantified changes in their abundance in response to stimuli that induce proteolytic remodeling of the cell surface proteome. To facilitate exploration of our datasets, we developed a web-accessible Atlas of Subtiligase-Captured Extracellular N Termini (ASCENT; http://wellslab.org/ascent). This technology will facilitate greater understanding of extracellular protease biology and reveal neo-N termini biomarkers and targets in disease.

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37

Warren, Di, and E. Seneta. "Peaks and Eulerian numbers in a random sequence." Journal of Applied Probability 33, no. 1 (March 1996): 101–14. http://dx.doi.org/10.2307/3215267.

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We consider the exact distribution of the number of peaks in a random permutation of the integers 1, 2, ···, n. This arises from a test of whether n successive observations from a continuous distribution are i.i.d. The Eulerian numbers, which figure in the p.g.f., are then shown to provide a link between the simpler problem of ascents (which has been thoroughly analysed) and both our problem of peaks and similar problems on the circle. This link then permits easy deduction of certain general properties, such as linearity in n of the cumulants, in the more complex settings. Since the focus of the paper is on exact distributional results, a uniform bound on the deviation from the limiting normal is included. A secondary purpose of the paper is synthesis, beginning with the more familiar setting of peaks and troughs.

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38

Warren, Di, and E. Seneta. "Peaks and Eulerian numbers in a random sequence." Journal of Applied Probability 33, no. 01 (March 1996): 101–14. http://dx.doi.org/10.1017/s0021900200103754.

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We consider the exact distribution of the number of peaks in a random permutation of the integers 1, 2, ···, n. This arises from a test of whether n successive observations from a continuous distribution are i.i.d. The Eulerian numbers, which figure in the p.g.f., are then shown to provide a link between the simpler problem of ascents (which has been thoroughly analysed) and both our problem of peaks and similar problems on the circle. This link then permits easy deduction of certain general properties, such as linearity in n of the cumulants, in the more complex settings. Since the focus of the paper is on exact distributional results, a uniform bound on the deviation from the limiting normal is included. A secondary purpose of the paper is synthesis, beginning with the more familiar setting of peaks and troughs.

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39

Meshkov, Vyacheslav M. "ABOUT THE SEQUENCE OF CREATION OF PLATO’S WORKS AS HIS PROGRESSIVE ASCENT TO THE APEX OF TRANSCENDENTAL THOUGHT." Humanitarian: actual problems of the humanities and education, no. 4 (December 30, 2018): 458–75. http://dx.doi.org/10.15507/2078-9823.044.018.201804.458-475.

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Introduction. The purpose of the article is to study the actual problem of the creative heritage of Plato’s historical interrelation of his works as they are created. Unfortunately, this work of paramount importance in the study of Platonism is still largely not completed. Materials and methods. The author used the methods of historical and logical, empirical and theoretical, as well as thematic and existential analysis. The method of considering the material developed by Karl Marx in the dialectical interrelation of the historical and logical aspects of its construction essentially helps in the affairs of historical reconstruction. Discussion. The peculiarity of the epistemological situation in which Plato remained was expressed in the fact that he was forced to proceed practically from a pure empirical language of observation. Therefore, in his philosophical studies, he had to display remarkable constructive abilities to create complex abstract-theoretical constructs from a poor arsenal of verbal means of the emerging secular ancient Greek language. In the history of world philosophy, I do not know a deeper and more productive philosopher in this regard. In working with Plato’s texts these points should be monitored. With the help of a thematic approach, an opportunity has been opened to study the formation and development of the main themes and concepts of Plato’s philosophy, developed in his dialogues, and build them in the appropriate sequence of their creation. Since the works of the great Athenian sage are to a considerable extent confessional in nature, the analysis of the existential component presented in them greatly helped to solve the research task. The Results of the Study. Using the above methods allowed us to build a fairly reasonable and productive version of the historical sequence of the creation of works of Plato. Keywords: transcendental discourse, transcendental philosophy, patriarch of western philosophy, true being, transcendental being, writer-philosopher.

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40

Salman, Rino, Eric O. Lindsey, Karen H. Lythgoe, Kyle Bradley, Muzli Muzli, Sang-Ho Yun, Shi Tong Chin, et al. "Cascading Partial Rupture of the Flores Thrust during the 2018 Lombok Earthquake Sequence, Indonesia." Seismological Research Letters 91, no. 4 (May 6, 2020): 2141–51. http://dx.doi.org/10.1785/0220190378.

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Abstract A series of four Mw>6 earthquakes struck the northern region of Lombok, eastern Indonesia, in a span of three weeks from late July to mid-August 2018. The series was thought to be associated with the Flores thrust, but the exact mechanism causing the unusual earthquake series has remained elusive. Our Interferometric Synthetic Aperture Radar analysis, combined with insights from seismology, indicates that the events originated at different hypocenter depths with differing fault geometries, which may explain the cascading behavior of the events, and indicates that better imaging of active fault geometry might provide some insight into future rupture behavior on other similar thrust systems. Our static stress change calculations suggest that the earlier events in the sequence played a role in promoting the later events. In addition, the second event brought the most significant impact on a nearby volcano, by causing volumetric expansion at its shallow magma plumbing system and unclamping its magma ascent zone, which may potentially have an impact on its future eruptive activity. However, no volcanic activity has so far occurred after the earthquakes. Finally, our damage proxy maps suggest that the second event caused the greatest damage to buildings.

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41

Guzik, J. A., and T. E. Beach. "The Effects of Main-Sequence Mass Loss on Surface C/N Abundance Ratios During the Ascent of the First Giant Branch." International Astronomical Union Colloquium 106 (1989): 228. http://dx.doi.org/10.1017/s0252921100062989.

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The surface C/N abundance ratios of many cluster and field G and K giants following the 1st dredge-up phase are much lower than predicted from standard stellar evolution modeling. The occurrence of substantial mass loss, either during or immediately after the main-sequence phase would both reduce the mass fraction of the unprocessed envelope necessary to contaminate with CN-cycle products, as well as allow CN-processing of a greater amount of core material during the earlier high-mass phase. Willson, Bowen and Struck-Marcell (1987) have proposed that a combination of pulsation and rapid rotation could drive substantial mass loss in main-sequence stars of initial mass 1-3 MΘ. We evolved a grid of 16 mass-losing models from the zero-age main sequence through 1st dredge-up. The models have initial masses of 1.25, 1.5, 1.75 and 2.0 MΘ, and exponentially decreasing mass-loss rates with e-folding times 0.2, 0.4, 1.0 and 2.0 Gyr; all models evolve toward a final mass of 1.0 M". Since the mass-loss epoch is short-lived, most of the models reach 1.0 M0 rapidly, and follow the evolutionary track of a standard 1 MΘ model redward away from the main sequence and up the 1st giant branch. The convecuve envelope deepens during 1st dredge-up to homogenize the outer 3/4 of the star's final mass.

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42

Nazari, N., J. W. van de Lindt, and Y. Li. "Effect of Mainshock-Aftershock Sequences on Woodframe Building Damage Fragilities." Journal of Performance of Constructed Facilities 29, no. 1 (February 2015): 04014036. http://dx.doi.org/10.1061/(asce)cf.1943-5509.0000512.

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43

Ibbs, William, Mark Berry, and Xiaodan Sun. "Visualizing Skipped and Out-of-Sequence Work." Journal of Legal Affairs and Dispute Resolution in Engineering and Construction 9, no. 4 (November 2017): 05017006. http://dx.doi.org/10.1061/(asce)la.1943-4170.0000240.

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44

Barry, Brock E., William C. Graves, and J. Ledlie Klosky. "Knowledge Decay in an Engineering Mechanics Sequence." Journal of Professional Issues in Engineering Education and Practice 143, no. 3 (July 2017): 04016024. http://dx.doi.org/10.1061/(asce)ei.1943-5541.0000319.

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45

Kobayashi, Nobuhisa, Beatriz Pozueta, and Jeffrey A. Melby. "Performance of Coastal Structures against Sequences of Hurricanes." Journal of Waterway, Port, Coastal, and Ocean Engineering 129, no. 5 (September 2003): 219–28. http://dx.doi.org/10.1061/(asce)0733-950x(2003)129:5(219).

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46

Cruise, J. F., and V. P. Singh. "Design of Sewage Lagoons Using Stochastic Streamflow Sequences." Journal of Water Resources Planning and Management 114, no. 3 (May 1988): 353–64. http://dx.doi.org/10.1061/(asce)0733-9496(1988)114:3(353).

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47

Horman, Michael J., Matthew P. Orosz, and David R. Riley. "Sequence Planning for Electrical Construction." Journal of Construction Engineering and Management 132, no. 4 (April 2006): 363–72. http://dx.doi.org/10.1061/(asce)0733-9364(2006)132:4(363).

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48

Aras, Fuat, and Ekber Düzci. "Seismic Performance of Traditional Stone Masonry Dwellings under Çanakkale Seismic Sequences." Journal of Performance of Constructed Facilities 32, no. 4 (August 2018): 04018029. http://dx.doi.org/10.1061/(asce)cf.1943-5509.0001173.

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49

Torres Calderon, Wilfredo, Dominic Roberts, and Mani Golparvar-Fard. "Synthesizing Pose Sequences from 3D Assets for Vision-Based Activity Analysis." Journal of Computing in Civil Engineering 35, no. 1 (January 2021): 04020052. http://dx.doi.org/10.1061/(asce)cp.1943-5487.0000937.

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50

Zou, Xiaoliang, Guihua Zhao, Jonathan Li, Yuanxi Yang, and Yong Fang. "Multiview Matching Algorithm for Processing Mobile Sequence Images." Journal of Surveying Engineering 143, no. 4 (November 2017): 04017020. http://dx.doi.org/10.1061/(asce)su.1943-5428.0000235.

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