scholarly journals A Possible Dust Origin for an Unusual Feature in Io’s Sodium Neutral Clouds

2021 ◽  
Vol 162 (5) ◽  
pp. 190
Author(s):  
Cesare Grava ◽  
Timothy A. Cassidy ◽  
Nicholas M. Schneider ◽  
Hsiang-Wen Hsu ◽  
Jeffrey P. Morgenthaler ◽  
...  
Keyword(s):  
Unusual Feature ◽  
Neutral Clouds

Brahmi legends on Umayyad Fulus: Interrogating local minting practices and numismatic transculturation in Gandhara (ca. 750 CE)

Afghanistan ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 153-165
Author(s):  
Waleed Ziad
Keyword(s):  
Base Metal ◽  
Late Antiquity ◽  
Eighth Century ◽  
Political Authority ◽  
Unusual Feature ◽  
Complex Relationship ◽  
Contact Zones ◽  
Confessional Identity ◽  
Derivatives Of

This paper concerns a historically significant find of copper derivatives of Umayyad post-reform fulus from Gandhara, probably minted in the mid-eighth century under Turk Shahi sovereignty (c. 667–875). The coins share an unusual feature: two Brahmi aksharas on an Umayyad AE prototype, inversely oriented to a partially-corrupted Arabic legend. These base metal coins represent perhaps the only known caliphal imitative varieties issued by moneyers beyond the eastern limits of Umayyad and Abbasid sovereignty. They have the potential to inform our understanding of the complex relationship between political authority, confessional identity, and coin typology in late antiquity – particularly within early “Hindu”– “Muslim” contact zones. Moreover, they provide invaluable clues into the circulatory regimes of Umayyad coinage.

scholarly journals Supernova constraints on an axion-photon-dark photon interaction

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Anson Hook ◽  
Gustavo Marques-Tavares ◽  
Clayton Ristow
Keyword(s):  
Longitudinal Mode ◽  
Transverse Mode ◽  
The Other ◽  
Unusual Feature ◽  
Dark Sector ◽  
Longitudinal Modes ◽  
Dark Photon ◽  
Transverse Modes ◽  
Weakly Coupled ◽  
Photon Coupling

Abstract We present the supernova constraints on an axion-photon-dark photon coupling, which can be the leading coupling to dark sector models and can also lead to dramatic changes to axion cosmology. We show that the supernova bound on this coupling has two unusual features. One occurs because the scattering that leads to the trapping regime converts axions and dark photons into each other. Thus, if one of the two new particles is sufficiently massive, both production and scattering become suppressed and the bounds from bulk emission and trapped (area) emission both weaken exponentially and do not intersection The other unusual feature occurs because for light dark photons, longitudinal modes couple more weakly than transverse modes do. Since the longitudinal mode is more weakly coupled, it can still cause excessive cooling even if the transverse mode is trapped. Thus, the supernova constraints for massive dark photons look like two independent supernova bounds super-imposed on top of each other.

Cystic Encapsulated Papillary Carcinoma in the Male Breast: An Unusual Feature With a Diagnostic Challenge

2021 ◽  
pp. 106689692110187
Author(s):  
Rongying Li ◽  
Karan Saluja ◽  
Brenda Mai ◽  
Michael Covinsky ◽  
Hongxia Sun
Keyword(s):  
Papillary Carcinoma ◽  
Cyst Wall ◽  
Correct Diagnosis ◽  
Nipple Discharge ◽  
Left Breast ◽  
Male Breast ◽  
Unusual Feature ◽  
Breast Mass ◽  
Repeat Biopsy ◽  
Bloody Nipple Discharge

Papillary carcinoma in the male breast is uncommon. Here, we report a case of a large encapsulated papillary carcinoma (EPC) in a 62-year-old male. The patient presented with a left breast mass of 1-year duration and bloody nipple discharge for several days. Mammography and breast ultrasonography showed a large left breast mass. The initial biopsy demonstrated fat necrosis with acute and chronic inflammation only. Due to clinical suspicion, a repeat biopsy was performed and revealed scant fragments of papillary carcinoma in a background of inflammation. The patient underwent left total mastectomy. Grossly, the breast contained a 9.0 cm entirely cystic lesion lined by a hemorrhagic thick fibrotic wall. No solid area was identified in the cyst. The entire cyst wall was examined under microscopy; only a few sections with papillary carcinoma were identified. The lesion was confined to the cyst wall; so, a diagnosis of EPC was made. Compared to the previously reported EPC cases of male breast, the lesion of this case was unusually cystic, which making the diagnosis challenging. Therefore, awareness of this unusual feature, repeat biopsy when the pathology result is discordant, and extensive sampling of the lesion are essential for making the correct diagnosis and guiding patient management.

scholarly journals The Persistence of Apparent Non-Magnetostatic Equilibrium in NOAA 11035

2014 ◽  
Vol 10 (S305) ◽  
pp. 35-41
Author(s):  
Sarah A. Jaeggli
Keyword(s):  
Magnetic Field ◽  
Active Region ◽  
Strong Magnetic Field ◽  
Solar Atmosphere ◽  
Activity Cycle ◽  
Opposite Polarity ◽  
Unusual Feature ◽  
Complete Picture

AbstractNOAA 11035 was a highly sheared active region that appeared in December 2009 early in the new activity cycle. The leading polarity sunspot developed a highly unusual feature in its penumbra, an opposite polarity pore with a strong magnetic field in excess of 3500 G along one edge, which persisted for several days during the evolution of the region. This region was well observed by both space- and ground-based observatories, including Hinode, FIRS, TRACE, and SOHO. These observations, which span wavelength and atmospheric regimes, provide a complete picture of this unusual feature which may constitute a force-free magnetic field in the photosphere which is produced by the reconnection of magnetic loops low in the solar atmosphere.

Bullous Pilomatricoma: A Report of Clinical and Pathologic Findings and Review of Dermal Bullous Disorders

2001 ◽  
Vol 5 (5) ◽  
pp. 394-396 ◽  
Author(s):  
Gabriele E. Weichert ◽  
Kevin L. Bush ◽  
Richard I. Crawford
Keyword(s):  
Case Report ◽  
Literature Review ◽  
Unusual Feature ◽  
Nous Rapportons ◽  
Pathological Feature ◽  
Pathological Features ◽  
Pathologic Findings ◽  
Hair Matrix ◽  
Adnexal Tumor ◽  
Vaisseaux Lymphatiques

Background: Pilomatricoma is a common benign adnexal tumor differentiating toward elements of the hair matrix and shaft. It typically presents as a solitary, deep, dermal nodule. We describe a case of a pilomatricoma with the unusual feature of a thick-walled dermal bulla overlying the tumor. Objective: We describe a case of bullous pilomatricoma and discuss the potential etiology of the bullous feature of the lesion. Methods: This article includes a case report and a literature review. Conclusions: Bullous pilomatricoma has rarely been described. A common pathological feature in this type of pilomatricoma is the presence of dilated lymphatics. Bullous morphea associated with dermal lymphatic dilation has also been described. In both bullous pilomatricoma and morphea, it is possible that individual pathological features of the lesion lead to obstruction and congestion of the dermal lymphatics thereby inducing enough dilation and edema to form a dermal bulla. Antécédents: Le pilomatrixome (épithéliome calcifiant de Malherbe) est une tumeur annexielle bénigne qui ressemble aux éléments de la matrice et de la tige pilaires. Il se manifeste typiquement par un nodule sous-cutané solitaire. Nous rapportons un cas de pilomatrixome présentant la caractéristique inhabituelle d'une bulle dermique à paroi épaisse située au-dessus de la tumeur. Objectifs: Décrire un cas de pilomatrixome bulleux et présenter l'étiologie potentielle d'une telle manifestation. Méthodes: Cet article comporte une étude de cas ainsi qu'une revue de la littérature. Conclusion: Le pilomatrixome bulleux a rarement été décrit. La dilatation des vaisseaux lymphatiques constitue une manifestation pathologique fréquente de cette forme de pilomatrixome. La morphée bulleuse a également été associée à une dilatation de vaisseaux lymphatiques. Il est possible que les caractéristiques pathologiques individuelles des lésions du pilomatrixome bulleux et de la morphée entraînent une obstruction et une congestion des vaisseaux lymphatiques, provoquant ainsi une dilatation et un œdème suffisamment importants pour former une bulle.

The Landing Gear of the SC.l Aircraft

1960 ◽  
Vol 64 (590) ◽  
pp. 81-86
Author(s):  
H. G. Conway
Keyword(s):  
Delta Wing ◽  
Landing Gear ◽  
Unusual Feature ◽  
Centre Of Gravity ◽  
Vertical Landing

The Short SC.l is a small delta wing V.T.O. aircraft of about 7,800 lb. all-up weight. Its unusual feature is that it is provided with vertical thrusting engines to enable it to take-off and land vertically and to hover. It can also operate normally as a conventional aircraft.The nature of the aircraft introduces a number of problems in the design of the landing gear. The first of these is that all wheels must be fully castoring since a vertical landing may take place with a certain amount of drift in any direction. Another complication arises because of the possibility of landing with slight backward drift, it being necessary to move the main wheels aft when the pilot intends to make a vertical landing; if the wheels were left in the required rearward position for conventional take-off the elevator power would be inadequate to lift the nose of the aircraft. The landing gear is therefore provided with simple means for moving the wheels fore and aft by a small amount, to move the position of the main wheels in relation to the centre of gravity.

scholarly journals Peripheral Ameloblastoma with Dystrophic Calcification: An Unusual Feature in Non-Calcifying Odontogenic Tumors

2014 ◽  
Vol 25 (3) ◽  
pp. 253-256 ◽  
Author(s):  
Nelise Alexandre da Silva Lascane ◽  
Bruno Tavares Sedassari ◽  
Fábio de Abreu Alves ◽  
Marina Helena Cury Gallottini ◽  
Suzana Cantanhede Orsini Machado de Sousa
Keyword(s):  
Soft Tissues ◽  
Squamous Metaplasia ◽  
Imaging Study ◽  
Unusual Feature ◽  
Bone Involvement ◽  
Odontogenic Tumors ◽  
Dystrophic Calcification ◽  
Detailed Imaging

Peripheral ameloblastoma is a rare extraosseous counterpart of central ameloblastoma that occurs in soft tissues and may cause bone crest resorption. This study reports a peripheral ameloblastoma on the buccal gingiva of a 56-year-old man, which presented extensive squamous metaplasia areas, keratinization and dystrophic calcifications in the neoplastic islands. It is emphasized the need of a detailed imaging study and a long follow-up period to exclude bone involvement whenever peripheral ameloblastoma diagnosis is considered.

On the Carboniferous shark Tristychius arcuatus Agassiz from Scotland

1978 ◽  
Vol 70 (4) ◽  
pp. 63-108 ◽  
Author(s):  
John R. F. Dick
Keyword(s):  
Oil Shale ◽  
Sensu Stricto ◽  
Skeletal Remains ◽  
Unusual Feature ◽  
Pectoral Fins

SynopsisSkeletal remains of Tristychius arcuatus commonly occur in ironstone nodules from the Scottish Upper and Lower Oil Shale Groups. This material is clearly distinguishable from the small shark from Glencartholm described by Traquair, Woodward and Moy-Thomas under this name. Study of the latter shows that its finspines are distinctly different from the holotype of T. arcuatus and, therefore, it has been renamed.Tristychius arcuatus sensu stricto is a medium-sized hybodont shark with a short gape, a functionally heterocercal tail and narrow-based, tribasal pectoral fins. Its most unusual feature is a well developed opercular gill cover composed of long hyoid rays. Evidence suggests that this character was present in several Palaeozoic sharks, although it is absent in all Recent elasmobranchs. It is not clear whether it was primitively present in chondrichthyans or evolved separately in several lineages.Hybodonts and ctenacanths are recognised as separate, specialised shark radiations, neither of which can be directly ancestral to Recent sharks. Of the two, hybodonts appear to be more closely related to Recent forms, although the presence of typical hybodont finspines in Tristychius arcuatus indicates that they had diverged from ancestral euselachians before the beginning of the Carboniferous.

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