On the Borromean arithmetic orbifolds

We revisit the fundamental groups Gmnp of the orbifolds Bmnp, where the underlying manifold is the 3-sphere S3 and the Borromean rings are the singular set with isotropies of order m, n and p. We correct an omission in [2] and show that is arithmetic if and only if (m, n, p) is one of the 12 triples (3, 3, 3), (3, 3, ∞), (3, 4, 4), (3, 6, 6), (3, ∞, ∞), (4, 4, 4), (4, 4, ∞), (4, ∞, ∞), (6, 6, 6), (6, 6, ∞), (∞, ∞, ∞). The main purpose of the paper is to present each Gmnp, arithmetic, as a group of 4 x 4 matrices with entries in the ring of integers of a totally real number field K, and which are automorphs of a quaternary form F with entries in K of Sylvester type (+, +, +, -)

A geological cross-section along the Basque Pyrenees and the Parentis Basin (Western Pyrenees)

A new geological cross- section along the North Iberian Margin shows a complete image of the Western Pyrenees and the Parentis Basin as well as the geometric differences and age constraints between both Pyrenean fronts. The South Pyrenean front, developed during Uppermost Cretaceous- Middle Miocene, is represented by a major thrust which accumulates around 20 km of southward displacement. The Basque- Cantabrian basin is a mesozoic extensional basin which was inverted during Paleogene times as a consequence of the Pyrenean orogeny. A basement- involved thrust wedge with an upper south- directed back- thrust characterizes the North Pyrenean Frontal Thrust. The main thrust, emplaced during Late Eocene- Miocene times, shows a displacement around 2 km whereas the back- thrust detached in Paleocene materials shows a displacement about 1.5 km. Northwards, the Landes High, is interpreted as an uplifted plateau where a thick wedge of Upper Cretaceous- Cenozoic synorogenic deposits overlay unconformably the Hercinian basement. This package corresponds with the North Pyrenean foreland basin. More to the north, the Landes fault is the southern margin of the Mesozoic Parentis Basin, a semigraben infilled with a thick package of Triassic to Albian synrift sequence overlied by Cretaceous and Cenozoic deposits. There, inversion structures were poorly developed

Homogeneity and plane-wave limits

We explore the plane-wave limit of homogeneous spacetimes. For plane-wave limits along homogeneous geodesics the limit is known to be homogeneous and we exhibit the limiting metric in terms of Lie algebraic data. This simplifies many calculations and we illustrate this with several examples. We also investigate the behaviour of (reductive) homogeneous structures under the plane-wave limit.Comment: In memory of Stanley Hobert, 33 pages. Minor corrections and some simplification of Section 4.3.

Banbuaren karakterizazio mekanikoa eta kimikoa

The bamboo, a tubular geometry plant, it is a promising replacement of traditional synthetic materials in the construction sector. In addition, it is renewable and environmentally sustainable. However, in order to promote its use, mechanical and chemical properties of bamboo must be known. This work analyses chemical and mechanical characteristics of three bamboo species not used in the construction sector, but widely used for other purposes: Phyllostachys aurea (PA), Arundinaria amabilis (AA) and Dendrocalamus strictus (DS). TAPPI standards have been used for the chemical analysis, while mechanical properties have been studied in compression and three-point flexion tests. The results have shown that the density of bamboo has a direct influence on mechanical properties, both in resistance and stiffness: for the analysed three bamboo species, the higher density the higher resistance and stiffness.; Banbuak, geometria tubularreko landareak, material sintetiko tradizionalen ordezko aukera interesgarriak aurkezten ditu eraikuntzaren sektorerako. Gainera, ingurumenaren aldetik jasangarria eta berriztagarria da. Hala ere, bere erabilera sustatzeko, beharrezkoa da banbuen propietate mekanikoak eta kimikoak ezagutzea. Lan honek gaur egun eraikuntzan ezezagunak diren baina tradizionalki oso erabiliak izan diren hiru espezie aztertzen ditu, kimikoki eta mekanikoki: dendrocalamus strictus (DS), Arundinaria amabilis (AA) eta Phyllostachys aurea (PA). Azterketa kimikorako, TAPPI arauak erabili dira, eta ezaugarri mekanikoak konpresioan eta dinamometroarekin makurdura hiru puntutan neurtuta aztertu dira. Propietate mekanikoen emaitzek erakutsi dute banbuaren dentsitateak eragin zuzena duela bai erresistentzian, bai zurruntasunean. Aztertutako hiru banbu-espezieetan, dentsitatea zenbat eta handiagoa izan, erresistentzia eta zurruntasuna orduan eta handiagoak direla ikusi da

Banbuaren karakterizazio mekanikoa eta kimikoa

The bamboo, a tubular geometry plant, it is a promising replacement for traditional synthetic materials in the construction sector. In addition, it is renewable and environmentally sustainable. However, in order to promote its use, mechanical and chemical properties of bamboo must be known. This work analyses chemical and mechanical characteristics of three bamboo species not used in the construction sector, but widely used for other purposes: Dendrocalamus strictus (DS), Arundinaria amabilis (AA) and Phyllostachys aurea (PA). TAPPI standards have been used for the chemical analysis, while mechanical properties have been studied in compression and three-point flexion tests. The results have shown that the density of bamboo has a direct influence on mechanical properties, both in resistance and stiffness: for the analysed three bam-boo species, the higher density the higher resistance and stiffness.; Banbua, geometria tubularra duen landarea den aldetik, hautagai interesgarria da eraikuntzaren sektorerako material sintetiko tradizionalen ordezko gisa erabiltzeko. Gainera, iraunkorra eta berriztagarria da ingurumenarekiko arretari dagokionez. Hala ere, haren erabilera sustatzeko, beharrezkoa da dituen propietate mekanikoak eta kimikoak ezagutzea. Lan honek kimikaren eta mekanikaren ikuspegitik aztertzen ditu gaur egun eraikuntzan ezezagunak diren baina tradizionalki oso erabiliak izan diren hiru banbu-espezie: Dendrocalamus strictus (DS), Arundinaria amabilis (AA) eta Phyllostachys aurea (PA). Azterketa kimikorako TAPPI arauak erabili dira, eta ezaugarri mekanikoak konpresioan eta dinamometroa baliatuz makurdura hiru puntutan neurtuta aztertu dira. Propietate mekanikoen emaitzek erakutsi dute banbuaren dentsitateak eragin zuzena duela bai erresistentzian eta bai zurruntasunean. Aztertutako hiru banbu espezieetan, dentsitatea zenbat eta handiagoa izan, erresistentzia eta zurruntasuna handiagoak direla ikusi da

Pleomorphic adenoma of minor salivary gland with therapeutic misadventure: a rare case report

<p>Abstract</p> <p>Background</p> <p>The benign tumors of nasopharynx are least encountered tumors in otolaryngology, as nasopharynx is considered one of notorious anatomical site for the malignant tumors. Pleomorphic adenoma of the minor salivary gland of nasopharynx and parapharyngeal space is rare. We present a pleomorphic adenoma of minor salivary gland which was mismanaged.</p> <p>Case presentation</p> <p>An adult male presented with left nostril obstruction for five months. The examination found big mass extending from nasopharynx to oropharynx. On CT scan, this tumor was quite big and extending to the parapharyngeal space. The FNAB found it a carcinoma but it did not respond to radiotherapy. The excision biopsy of tumor revealed it as pleomorphic adenoma. We found only five published reports on this tumor arising from nasopharynx.</p> <p>Discussion and conclusion</p> <p>Although, in this case report exact origin of the tumor could not be ascertained as it also appeared to be a parapharyngeal tumor but we kept the possibility of a nasopharyngeal tumor on the basis of clinical features. The pleomorphic adenoma of nasopharynx is rare. It can be misdiagnosed as malignant epithelial tumor on histopathology. The differentiation from its malignant variant is also difficult. A possibility of benign tumor should always be kept in nasopharyngeal growth with no evidence of metastasis, and histopathological diagnosis of growth should be available before any definitive treatment.</p

Contribution of DEAF1 Structural Domains to the Interaction with the Breast Cancer Oncogene LMO4

The proteins LMO4 and DEAF1 contribute to the proliferation of mammary epithelial cells. During breast cancer LMO4 is upregulated, affecting its interaction with other protein partners. This may set cells on a path to tumour formation. LMO4 and DEAF1 interact, but it is unknown how they cooperate to regulate cell proliferation. In this study, we identify a specific LMO4-binding domain in DEAF1. This domain contains an unstructured region that directly contacts LMO4, and a coiled coil that contains the DEAF1 nuclear export signal (NES). The coiled coil region can form tetramers and has the typical properties of a coiled coil domain. Using a simple cell-based assay, we show that LMO4 modulates the activity of the DEAF NES, causing nuclear accumulation of a construct containing the LMO4-interaction region of DEAF1