Solving the Traveling Circus Problem by Branch & Cut

2000 ◽  
Vol 3 ◽  
pp. 1-5
Author(s):  
M HARTMANN ◽  
O OZLUK
Keyword(s):  
1999 ◽  
Vol 3 ◽  
pp. 72-76 ◽  
Author(s):  
Mark Hartmann ◽  
Özgur Özlük
Keyword(s):  

Author(s):  
Ojārs Lāms

In the broad tradition of the Latvian historical novel, which has flourished in recent decades, the authors have a strong tendency to focus either on ancient history up to the 13th century or on events important to the Latvian nation in the 19th and 20th centuries. Writers are less interested in the era of humanism in the 16th and 17th centuries when the Latvian nation is still sprouting in the ground. However, these centuries have been crucial in defining the region’s geopolitical affiliation and cultural boundaries. From a broader diachronic view at Latvian novels, it can be stated that a number of Latvian writers, starting from the beginning of the 20th century, have tried to give a textual life to the humanist era in Livonia with various approaches to the historical novel thus creating a special set of texts to be called the Livonian text. Within the framework of this article, the view on the Livonian text consists of a review of 8 novels that have been written over more than a hundred years. They are not all texts on the subject but form a compact and representative sample in terms of theme, stylistics, and genre features. These texts are Andrievs Niedra’s (1871–1942) novel “When the Moon Wears Out” (Kad mēness dilst, 1902), Rutku Tēvs’s (1886–1961) “Rebellious Riga” (Dumpīgā Rīga, 1930) and “Mūksala Brothers” (Mūksalas brāļi, 1934), Astrīda Beināre’s (1937–2016) “Our Lady of Riga Monastery” (Rīgas Dievmātes klosteris, 1993), Aivars Kļavis’s (1953) tetralogy “Beyond the Gate” (Viņpus vārtiem), which consists of the novels “Jester of Adiaminde” (Adiamindes āksts, 2005), “Riga Humpback” (Rīgas kuprītis, 2007), “Ridiculed Soldier” (Piesmietais karavīrs, 2009), “Captives of the Traveling Circus” (Ceļojošā cirka gūstekņi, 2012).


Geophysics ◽  
2017 ◽  
Vol 82 (1) ◽  
pp. D1-D11 ◽  
Author(s):  
Xiaobo Zheng ◽  
Hengshan Hu

To seek measures to weaken the collar wave signals so that the formation arrivals are observable, it is important to make theoretical analysis of separate collar wave and formation arrivals in the acoustic logging-while-drilling environment. However, until now, the collar wave signal and the formation P- and S-arrivals have never been separately calculated. We have obtained individual component waves using the residue theorem and the branch-cut integral method, including residues at leaky poles. The waveform summed up from all individual waves is shown to agree well with the full waveform calculated by real-axis integration. In particular, the formation P-wave is obtained by summing the formation leaky mode and the compressional branch-cut integral for slow formations. The collar wave is found to propagate in the borehole and the formation as well as in the collar. Although the traveling speed of the collar wave is almost irrelevant to the formation, the attenuation and excitation spectrum of the collar wave are significantly affected by the formation, which reveals that an effective collar wave weakening design should be based on a model with the formation being taken into consideration.


2000 ◽  
Vol 39 (26) ◽  
pp. 4802 ◽  
Author(s):  
Bernd Gutmann ◽  
Herbert Weber

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