scholarly journals Analyse Du Remplissage Sédimentaire De La Partie Centrale Du Bassin Des Iullemmeden (Niger Central) Pendant La Période Allant Du Crétacé Supérieur Au Paléocène-Yprésien Et Transgressions Associées

2021 ◽  
Vol 17 (29) ◽  
pp. 1
Author(s):  
Karimou Laouali Idi ◽  
Abdoulwahid Sani ◽  
Moussa Konaté
Keyword(s):  
Upper Cretaceous ◽  
Mise En Œuvre ◽  
Age Related ◽  
Bibliographic Data ◽  
Bottom To Top

L’analyse du remplissage sédimentaire du bassin des Iullemmeden pendant la période allant du Crétacé supérieur au Paléocène-Yprésien a permis de mettre en évidence une succession de 5 à 6 épisodes transgressifs. La succession verticale des faciès, identifiés pour cette période, comprend de la base au sommet : des grès calcaires et argiles à gypses, d'âge Turonien inférieur-Cénomanien supérieur mises en place pendant la transgression T1, des calcaires et argilites gypsifères, d'âge Turonien supérieur déposés au cours de la transgression T2, des calcaires et marnes sableuses, d'âge Sénonien inférieur et moyen rattachés à la transgression T3, des siltites et des argilites, d’âge maastrichtien, mises en place pendant la transgression T4 à Libycoceras ismaeli et Laffiteina bibensis et des argilo-calcaires d’âge paléocène-yprésien, associés aux transgressions T5 et T6 respectivement à Ranikothalia bermudezi et Lochkartia hamei. Néanmoins, il ressort une controverse dans la datation et le classement des différentes transgressions ainsi mise en évidence dans ce bassin des Iullemmeden. Ainsi, l’objectif principal de la présente étude est de proposer une synthèse des différentes transgressions identifiées dans ce bassin. La méthodologie mise en oeuvre est basé sur l'exploitation des données bibliographiques soutenue par des données lithostratigraphiques, paléontologiques, sédimentologiques. Les résultats de cette étude montrent que le bassin des Iullemmeden à été comblé par six ou sept transgressions marines au lieu de cinq ou six reconnues.  The analysis of the sedimentary infilling of the Iullemmeden basin during the period ranging from Upper Cretaceous to Paleocene-Ypresian has revealed a succession of 5 or 6 transgressive episodes. The vertical succession of facies, identified for this period, includes from the bottom to top: calcareous sandstones and gypsum clays, of Lower Turonian-Upper Cenomanian age, deposited during the T1 transgression, gypsiferous limestones and mudstones of Upper Turonian deposited during theT2 transgression, sandy limestones and marls of Lower and Middle Senonian age related to T3 transgression, siltstones and argillites, of Maastrichtian age, deposited during the T4 transgression with Libycoceras ismaeli and Laffiteina bibensis and clay-limestones of Paleocene-Ypresian age, associated with transgressions T5 and T6 respectively with Ranikothalia bermudezi and Lochkartia hamei. Nevertheless, a controversy emerges in the dating and the classification of the various transgressions thus highlighted in this basin of the Iullemmeden. Thus, the main objective of this study is to provide a synthesis of the various transgressions identified in this basin. The methodology implemented is based on the use of bibliographic data supported by lithostratigraphic, paleontological and sedimentological data. The results of this study show that the Iullemmeden basin was infilled by six or seven marine transgressions instead of five or six recognized.

scholarly journals Epileptic Encephalopathies: An Overview

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Sonia Khan ◽  
Raidah Al Baradie
Keyword(s):  
Slow Wave Sleep ◽  
Epileptic Encephalopathy ◽  
Dravet Syndrome ◽  
Management Options ◽  
Epileptic Encephalopathies ◽  
Age Related ◽  
Ohtahara Syndrome ◽  
Cerebral Dysfunction ◽  
Epileptic Syndromes

Epileptic encephalopathies are an epileptic condition characterized by epileptiform abnormalities associated with progressive cerebral dysfunction. In the classification of the International League Against Epilepsy eight age-related epileptic encephalopathy syndromes are recognized. These syndromes include early myoclonic encephalopathy and Ohtahara syndrome in the neonatal period, West syndrome and Dravet syndrome in infancy, myoclonic status in nonprogressive encephalopathies, and Lennox-Gastaut syndrome, Landau-Kleffner syndrome, and epilepsy with continuous spike waves during slow wave sleep in childhood and adolescences. Other epileptic syndromes such as migrating partial seizures in infancy and severe epilepsy with multiple independent spike foci may be reasonably added. In this paper, we provide an overview of epileptic encephalopathies including clinical neurophysiological features, cognitive deterioration, and management options especially that these conditions are generally refractory to standard antiepileptic drugs.

Parataxonomic classification of ornithoid eggshell fragments from the Oldman Formation (Judith River Group; Upper Cretaceous), southern Alberta

1996 ◽  
Vol 33 (12) ◽  
pp. 1655-1667 ◽  
Author(s):  
Darla K. Zelenitsky ◽  
L. V. Hills ◽  
Philip J. Currie
Keyword(s):  
Late Cretaceous ◽  
Shell Thickness ◽  
Upper Cretaceous ◽  
Theropod Dinosaur ◽  
Surface Sculpture ◽  
External Zone ◽  
Theropod Dinosaurs ◽  
Southern Alberta ◽  
The Family

Examination of a large number of eggshell fragments collected from the Oldman Formation of southern Alberta reveals a greater ootaxonomic diversity than is known from complete eggs or clutches. Three new oogenera and oospecies of the ornithoid-ratite morphotype and one of the ornithoid-prismatic morphotype are established, based on the eggshell fragments. Porituberoolithus warnerensis oogen. et oosp. nov. and Continuoolithus canadensis oogen. et oosp. nov. have a microstructure similar to that of elongatoolithid eggs of theropod dinosaurs. Tristraguloolithus cracioides oogen. et oosp. nov. and Dispersituberoolithus exilis oogen. et oosp. nov. possess an external zone and thus have a microstructure like modern avian eggshell. Tristraguloolithus has a shell thickness, microstructure, and surface sculpture similar to those of recent bird eggshell of the family Cracidae (order Galliformes). Dispersituberoolithus exhibits the primitive or normal eggshell condition of some recent neognathous avian taxa. The ootaxa described indicate a diversity of both avian and theropod dinosaur egg layers within Devil's Coulee and Knight's Ranch, southern Alberta, during the Late Cretaceous.

scholarly journals Aesthetic Medicine

2019 ◽  
Vol 4 (5) ◽  
Keyword(s):  
Muscle Tone ◽  
Upper Eyelid ◽  
Aesthetic Medicine ◽  
Age Related ◽  
The Face ◽  
Injection Techniques ◽  
Physiological Type ◽  
Age Related Changes ◽  
Morph Type

GalynaViktorovnaKhrushch plastic surgeon, maxillofacial surgeon, international candidat ASPS, Periorbital area is worthily considered as one of the most complicated regions in terms of correction of the age-related changes using injection techniques of medical aesthetics. According to the classification of I.I. Kolgunenko Russian (1974), tired morph type of age-related changes which is the most physiological type of aging, incorporates changes mainly focused in the middle third of the face, including in the periorbital area. These changes include the formation of grooves (tear trough, palpebromalar groove, nasojugal groove) (Figure 1), dark under-eye circles, mimic wrinkles formation, fat compartment displacement, change in mimic muscle tone, stretching of ligamentous structures, overhang of the upper eyelid.

scholarly journals Classic papers: using Google Scholar to detect the highly-cited documents

2018 ◽  
Author(s):  
Enrique Orduna-Malea ◽  
Alberto Martín-Martín ◽  
Emilio Delgado López-Cózar
Keyword(s):  
English Language ◽  
Original Data ◽  
Google Scholar ◽  
Original Research ◽  
Bibliographic Data ◽  
Methodological Concern ◽  
Broad Subject ◽  
Classic Papers ◽  
Highly Cited

In June 2017 Google Scholar launched a new product called Classic Papers. This service currently displays the most cited English-language original research articles by fields and published in 2006. The main goal of this work is to describe the main characteristics and features of this Google Scholar’s new service, as well as to highlight its main strengths and weaknesses. To do this, a total of 2,515 records were extracted. Additionally, for each record, the following bibliographic data were gathered: broad subject category and subcategory, Title of the document, URL, Authors, Google Scholar Citation profiles’ URL, and Citations received. It is finally concluded that, although the product is easy to use and provides original data about highly cited documents at the level of disciplines, it still suffers of some methodological concerns, mainly related to the subject classification of documents and the use of homogenous visualization threshold regardless the discipline, that jeopardizes the utility of this product for bibliometric purposes. In addition to this, the lack of transparency constitutes a methodological concern, since Google Scholar does not to declare in detail how the product has been developed.

scholarly journals Classification of the Asian non-marine Cretaceous System

1984 ◽  
Vol 33 ◽  
pp. 115-122
Author(s):  
Guo Fuxiang
Keyword(s):  
Upper Cretaceous ◽  
Yellowish Green

The Asian non-marine Cretaceous System may be divided into two geographical provinces: a southern one, dominated by elastic red salt-bearing formations, and a northern one, dominated by elastic grey, yellowish green and black formations containing coal (kukersit). Vertically, on the basis of three trigonioi­dacean assemblages (bivalves), the System may be subdivided into Lower, Middle and Upper Cretaceous, three provincial series exhibiting this tripartite character. 4 zones and 6 subzones of the known trigonioi­daceans are tentatively presented.

The Epidemilogy of Chronic Venous Ulcer: Some Unanswered Questions

2000 ◽  
Vol 15 (3-4) ◽  
pp. 106-109
Author(s):  
C. V. Ruckley
Keyword(s):  
Chronic Venous Insufficiency ◽  
Venous Insufficiency ◽  
Varicose Veins ◽  
Clinical Manifestations ◽  
Epidemiological Studies ◽  
Therapeutic Interventions ◽  
Venous Disease ◽  
Clinical Classification ◽  
Age Related

Objective: To highlight gaps in knowledge concerning the epidemiology of chronic venous insufficiency and to indicate what future studies are required. Methods: Existing classifications are compared. Limitations of epidemiological studies are defined. Data from published series and from the Edinburgh Vein Study are presented. Synthesis: The Basle 1978 classification of chronic venous insufficiency (CVI) is a purely clinical classification in which the earliest grade is corona phlebectatica. The Porter 1988 classification of CVI attempted to correlate clinical grades with sites of venous incompe-tence. However, a consistent relationship does not exist. The CEAP classification separates the clinical grades (which do not include corona phlebectasia) from the anatomical segments. The CEAP clinical classification covers a range of venous manifestations but is not consistent. There is a need for further consideration of classifications. Published selected series of patients show that the frequency of incompetence in both deep and superficial systems increases in proportion to the severity of the clinical manifestations of venous disease. To understand the significance of these data we need to know the patterns of venous incompetence in the general population. Data from 1566 subjects between the ages of 18 and 64 years in the Edinburgh Vein Study, a randomly selected cross-section of members of the Edinburgh population, showed that the prevalence of CVI was age-related and was present in 9.2% of men and 6.6% of women. Men had a significantly higher frequency of reflux in the deep system than women. In order to direct therapeutic interventions where they are most appropriate we need to know which patients with the early stages of varicose veins progress to CVI and which patients with early CVI progress to the serious skin complications. Conclusions: Key information concerning the natural history of venous disease and its evolution in relation to haemodynamic abnormalities awaits the findings of longitudinal-cohort epidemiological studies which include the duplex scanning of large populations.

scholarly journals Utility of Deep Learning Methods for Referability Classification of Age-Related Macular Degeneration

2018 ◽  
Vol 136 (11) ◽  
pp. 1305 ◽  
Author(s):  
Phillippe Burlina ◽  
Neil Joshi ◽  
Katia D. Pacheco ◽  
David E. Freund ◽  
Jun Kong ◽  
...  
Keyword(s):  
Deep Learning ◽  
Macular Degeneration ◽  
Age Related Macular Degeneration ◽  
Learning Methods ◽  
Age Related

Bone Dysplasias

2018 ◽  
Author(s):  
Jürgen W. Spranger ◽  
Paula W. Brill ◽  
Christine Hall ◽  
Gen Nishimura ◽  
Andrea Superti-Furga ◽  
...  
Keyword(s):  
Bone Density ◽  
Clinical Features ◽  
Differential Diagnoses ◽  
Short List ◽  
Age Related ◽  
Bone Dysplasias ◽  
Text Presentation ◽  
Skeletal Disorders

This is a unique atlas presenting age-related radiographs on more than 250 rare constitutional skeletal diseases (dysplasias, dysostoses, osteolyses, disorders of bone density, and more) focusing on diagnostically essential radiographic and clinical features. Each chapter is supplemented with prognostic and therapeutic information, a guide to differential diagnoses, and a short list of the most relevant publications. A major advantage is the systematic conformation of chapters, sparing the reader a cumbersome read-through of longer text. Presentation in accordance with the most recent International Nosology and Classification of Genetic Skeletal Disorders.

Sign in / Sign up

Export Citation Format

Share Document