scholarly journals The ν-Tamari Lattice via ν-Trees, ν-Bracket Vectors, and Subword Complexes

10.37236/8000 ◽  
2020 ◽  
Vol 27 (1) ◽  
Author(s):  
Cesar Ceballos ◽  
Arnau Padrol ◽  
Camilo Sarmiento

We give a new interpretation of the $\nu$-Tamari lattice of Préville-Ratelle and Viennot in terms of a rotation lattice of $\nu$-trees. This uncovers the relation with known combinatorial objects such as north-east fillings, \mbox{tree-like} tableaux and subword complexes. We provide a simple description of the lattice property using certain bracket vectors of $\nu$-trees, and show that the Hasse diagram of the $\nu$-Tamari lattice can be obtained as the facet adjacency graph of certain subword complex. Finally, this point of view generalizes to multi $\nu$-Tamari complexes, and gives (conjectural) insight on their geometric realizability via polytopal subdivisions of multiassociahedra.


2020 ◽  
Vol 8 (2) ◽  
pp. 13
Author(s):  
Ankita Pandey

Guwahati derives its name from the Assamese word “Guwa” means areca nut and “Haat” means market. However, the modern Guwahati had been known as the ancient Pragjyotishpura and was the capital of Assam under the Kamrupa kingdom. A beautiful city Guwahati is situated on the south bank of the river Bramhaputra. Moreover, It is known as the largest city in the Indian state of Assam and also the largest metropolis in North East India. It has also its importance as the gateway to the North- East India. Assamese and English are the spoken languages in Guwahati.  In 1667, the Mogul forces were defeated in the battle by the Ahom forces commanded by Lachut Barphukan. Thus, in a sense Guwahati became the bone of contention among the Ahoms, Kochas and the Moguls during the medieval period.  Guwahati the administrative headquarters of Lower Assam with a viceroy or Barbhukan was made by the Ahom king.  Since 1972 it has been the capital of Assam. The present paper will discuss the changes happened in Guwahati over the period of late 1970s till the present time. It will focus on the behavior of people, transformed temples, Panbazar of the city, river bank of Bramhaputra, old Fancy Bazaar, chaotic ways, festivals and seasons including a fifth man made season etc. It will also deal how over the years a city endowed with nature’s gifts and scenic views, has been changing as “a dirty city”. Furthermore, it will also present the insurgencies that have barged into the city. The occurrence of changes will be discussed through the perspective and point of view of Srutimala Duara as presented in her book Mindprints of Guwahati.



2015 ◽  
Vol 2 (3) ◽  
pp. 101-104
Author(s):  
Romana Hricová

Green logistics is very attractive and request the point of view. Many companies try to be “green”, but on the other hand they also must be quick, be in right time in the right place and everything with as low costs as possible. So because of it, they use more road freight transport. Nowadays road freight transport is much expanded as transport companies prefer the possibility to operate just-in-time.  There are several advantages that give road freight transport the first place. Firstly, the truck can be prepared whenever, no matter what time is chosen.  Secondly, the flexibility and no more borders with customs control inside the Schengen Area make freight transport quicker. On the other hand, innovative approaches ask for environmental protection, which becomes one of the most important points of view.  If countries support this environmental friendly transport, this would be reflected in the transport prices which should make rail transport more interesting. Using the methodology in the manuscript was divided to three steps. The first step is to identify relevant questions related to border crossing. Next step is to elaborate a list of border problems, and the last step is an analysis of available data.  



Author(s):  
Valentino Gasparini

The results of the archaeological exploration of the Roman vicus of Falacrinae, placed in the Upper Sabina 78 miles north-east of Rome, represent excellent first-hand material for testing the concept of “rurification” of religion.  The frequentation of the area goes back over time at least to the late Neolithic, but it is only in the Archaic period that a temple was built, soon converting itself into a sort of pole of attraction of the local community. After the Roman conquest (290 BCE), an entire village gradually arose around the monument. 129 sacrificial foci, dated between the late 3rd and the second half of the 1st cent. BCE (probably linked with the festivals of the Feriae Sementivae, Paganalia or Compitalia), and few burials (suggrundaria) belonging to perinatal foetuses of 30/40 weeks of gestation, dated during the 2nd and the first half of the 1st cent. BCE, are the most intriguing ritual practices that the excavations have been able to identify. The analysis of these practices encourages to conclude that the local rural communities: 1) adopted group-styles of religious grouping significantly different from those taking place in urban contexts; 2) could strongly modify hierarchies and rituals performed in the cities; 3) cannot necessarily be considered as “deviant” from the normative point of view; 4) could easily negotiate between local religious traditions and urban patterns.



2021 ◽  
Author(s):  
Haddad Amar ◽  
Beldjazia Amina ◽  
Kadi Zahia ◽  
Redjaimia Lilia ◽  
Rached-Kanouni Malika

Mediterranean ecosystems are considered particularly sensitive to climate change. Any change in climatic factors affects the structure and functioning of these ecosystems and has an influence on plant productivity. The main objective of this work is to characterize one of the Mediterranean ecosystems; the Chettaba forest massif (located in the North-East of Algeria) from a vegetation point of view and their link with monthly variations using Landsat 8 satellite images from five different dates (June 25, 2017, July 27, 2017, August 28, 2017, October 15, 2017). The comparison of NDVI values in Aleppo pine trees was performed using analysis of variance and the use of Friedman's non-parametric test. The Mann-Kendall statistical method was applied to the monthly distribution of NDVI values to detect any trends in the data over the study period. The statistical results of NDVI of Aleppo pine trees indicate that the maximum value is recorded in the month of June, while the lowest values are observed in the month of August where the species studied is exposed to periods of thermal stress.



Author(s):  
Richard Hingley

The works examined above have been explored through a chronological study based upon the four overlapping themes of civility/ Romanization, the walling out of humanity, Roman incomers, and ruination, emphasized through a reading of the sources to explore how the discovery of objects and sites has helped to inform a number of contrasting interpretations that went in and out of fashion. A number of more local and fragmented tales have also been addressed in passing and it is evident that a very different account could have been articulated if I had drawn more directly upon such ideas. Tales, such as those of Onion the Silchester Giant, Graham’s creation of a breach in the Antonine Wall, King Arthur and his ‘O’on’ at Camelon in central Scotland and the activities of the devil at Rodmarton, provide information about how local people interpreted the physical remains of the Romans in Britain. The focus on elite tales in this book should not detract from the potential of local myths, but a thorough study of such material remains to be undertaken. Instead, this book has emphasized stories that have been told about the pre- Roman and Roman history of Britain that served to develop relevant national and imperial tales. The significance of the civilizing of the ancient Britons drove a particular approach to the ancient sources during the early seventeenth century that emphasized the passing on of Roman civility to people of England (or Lowland Britain). From this point of view, the ruined Roman Walls projected the territorial limit of civility, beyond which were the lands of barbarians. Towards the end of the century, a new interpretation arose that placed emphasis on the Roman settlers, their ‘stations’, and roads, reflecting the contemporary military aspect of society while envisaging England (or Lowland Britain) as the inheritor of Roman civility. This military conception was redefined and updated during the succeeding centuries as an analogy for the extension of state control over the Scottish Highlands and later for the exploration, documentation, and domination of territories in India and elsewhere.



1961 ◽  
Vol 3 (30) ◽  
pp. 1089-1096
Author(s):  
I. P. Gerasimov

Abstract The Siberian pole of cold is situated in the extreme north-east of Eurasia (in the region of the Cherskiy mountain system, in the upper parts of the basins of the Yana, Indigirka and Kolyma Rivers). Particularly low air and soil temperatures have been observed in the intermontane areas. Among these localities is the famous Oymyakon, where the lowest minimum temperature in the Northern Hemisphere has been recorded. In the climate of this area extreme aridity, connected with the intracontinental position of the territory, is combined with intense cold. In the two highest massifs (Ulakhan-Chistay and Suntar-Khayata) small centres of recent glacierization (chiefly kars) are developed; there are also distinct traces of a more extensive older mountain glaciation. In the intermontane areas and on the principal level of the dissected hilly peneplain positive indications of a former glaciation are absent. However, the recent cryogenic phenomena represented by fossil ice, permafrost, taryns, as well as thermokarstic, solifluction and congelation features, are very abundant and diverse. The widespread development of all these features gives this territory a periglacial aspect, and also provides the possibility of using the study of many recent phenomena for palaeogeographical purposes. From this point of view, the processes leading to the formation of loess deposits (cryogenic facies) and the formation of structural and thixotropic soils arc of particular interest. The recent natural landscapes in this region are represented by a dominant type of larch tundra–forest associated with comparatively typical taiga bog formations in the depressions and xero-cryophile meadow–steppe landscapes on the steeper and warmer southern slopes. Such a unique landscape combination connected with the specific climatic conditions of this region provide a basis for interpreting the recent natural conditions of the Siberian pole of cold as a survival of the “late glacial.” At present these natural conditions are being intensively developed economically.



1961 ◽  
Vol 3 (30) ◽  
pp. 1089-1096
Author(s):  
I. P. Gerasimov

AbstractThe Siberian pole of cold is situated in the extreme north-east of Eurasia (in the region of the Cherskiy mountain system, in the upper parts of the basins of the Yana, Indigirka and Kolyma Rivers). Particularly low air and soil temperatures have been observed in the intermontane areas. Among these localities is the famous Oymyakon, where the lowest minimum temperature in the Northern Hemisphere has been recorded. In the climate of this area extreme aridity, connected with the intracontinental position of the territory, is combined with intense cold.In the two highest massifs (Ulakhan-Chistay and Suntar-Khayata) small centres of recent glacierization (chiefly kars) are developed; there are also distinct traces of a more extensive older mountain glaciation. In the intermontane areas and on the principal level of the dissected hilly peneplain positive indications of a former glaciation are absent. However, the recent cryogenic phenomena represented by fossil ice, permafrost, taryns, as well as thermokarstic, solifluction and congelation features, are very abundant and diverse.The widespread development of all these features gives this territory a periglacial aspect, and also provides the possibility of using the study of many recent phenomena for palaeogeographical purposes. From this point of view, the processes leading to the formation of loess deposits (cryogenic facies) and the formation of structural and thixotropic soils arc of particular interest.The recent natural landscapes in this region are represented by a dominant type of larch tundra–forest associated with comparatively typical taiga bog formations in the depressions and xero-cryophile meadow–steppe landscapes on the steeper and warmer southern slopes. Such a unique landscape combination connected with the specific climatic conditions of this region provide a basis for interpreting the recent natural conditions of the Siberian pole of cold as a survival of the “late glacial.” At present these natural conditions are being intensively developed economically.



1902 ◽  
Vol 70 (459-466) ◽  
pp. 231-237

Related to the stomachs of some Gastropods and Lamellibranchs there are two conspicuous appendages, the so-called crystalline style-sac and the so-called spiral cæcum. They have long been known to exist in these orders, but have never been adequately dealt with from a morphological point of view. Both have hitherto been regarded as enigmatical structures, capricious in their appearance or non-appearance, and in their relationships.



Phronesis ◽  
2005 ◽  
Vol 50 (4) ◽  
pp. 263-288 ◽  
Author(s):  
Stephen Makin

AbstractIn this paper I offer a new interpretation of Melissus' argument at DK 30 B8.In this passage Melissus uses an Eleatic argument against change to challenge an opponent who appeals to the authority of perception in order to support the view that there are a plurality of items in the world. I identify an orthodox type of approach to this passage, but argue that it cannot give a charitable interpretation of Melissus' strategy. In order to assess Melissus' overall argument we have to identify the opponent at whom it is aimed. The orthodox interpretation of the argument faces a dilemma: Melissus' argument is either a poor argument against a plausible opponent or a good argument against an implausible opponent.My interpretation turns on identifying a new target for Melissus' argument. I explain the position I call Bluff Realism (contrasting it with two other views: the Pig Headed and the Fully Engaged). These are positions concerning the dialectical relation between perception on the one hand, and arguments to counter-perceptual conclusions on the other. I argue that Bluff Realism represents a serious threat from an Eleatic point of view, and is prima facie an attractive position in its own right.I then give a charitable interpretation of Melissus' argument in DK 30 B8, showing how he produces a strong and incisive argument against the Bluff Realist position I have identified. Melissus emerges as an innovative and astute philosopher.



2005 ◽  
Vol 3 (3) ◽  
pp. 400-413 ◽  
Author(s):  
Gudrun B. Keller ◽  
Hassan Mndiga ◽  
Brigitte L. Maass

Traditional vegetables in Tanzania have been underutilized by farmers and neglected by research and development programmes. In the framework of the project ‘Promotion of Neglected Indigenous Vegetable Crops for Nutritional Health in Eastern and Southern Africa’ led by the World Vegetable Center (AVRDC) and partners, focus group meetings were conducted in 10–12 villages in each of four districts of north-east Tanzania, which differed in ethnicity as well as in altitude, climate and soil conditions. Farmers named 10–34 different traditional vegetables per village, summing up to an overall of 102 in all four districts, about half of which were only identified by local names. The number of wild traditional vegetables used was always greater than the number of cultivated traditional types, with ratios of wild to cultivated vegetables ranging from 11:9 in an urban highland district to 59:11 in a rural coastal district. Some wild traditional vegetables were found to be threatened with genetic erosion due to changes in land use and eating habits. The degree of urbanization and the availability of infrastructure contributed more strongly to genetic erosion as compared to climatic conditions. Farmers' training encouraged exotic vegetable cultivation and reduced traditional vegetable diversity. At the same time, indigenous knowledge on how and where to collect, cultivate and prepare traditional vegetables was disappearing.



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