Results 11 to 20 of about 130,774 (227)

On higher secant varieties of rational normal scrolls [PDF]

open access: yesLe Matematiche, 1996
In this paper we study the higher secant varieties of rational normal scrolls, in particular we give them as determinantal varieties. From this we can obtain, in some cases, the sequence of secant defects, generalizing to a class of varieties and to ...
Pietro De Poi
doaj   +2 more sources

COMPANION VARIETIES FOR HESSE, HESSE UNION DUAL HESSE ARRANGEMENTS [PDF]

open access: yes, 2023
Unexpected hypersurface is a name given an element to some particular linear system introduced around in [2], motivated by work of Di Gennaro, Ilardi and Vall`es and of Faenzi and Vall`es, and it is a field of great study since then.
De Poi, Pietro   +3 more
core   +1 more source

Comparison the therapeutic effects of bone marrow CD144+ endothelial cells and CD146+ mesenchymal stem cells in POF rats [PDF]

open access: yesBioImpacts, 2023
Introduction: Premature ovarian insufficiency (POI) is a challenging issue in terms of reproduction biology. In this study, therapeutic properties of bone marrow CD146+ mesenchymal stem cells (MSCs) and CD144+ endothelial cells (ECs) were separately ...
Nahideh Nazdikbin Yamchi   +7 more
doaj   +1 more source

DNA damage in gill cells of Corbicula japonica exposed to natural and anthropogenic stressors

open access: yesFrontiers in Genetics, 2015
Bivalve mollusks are sensitive biomarkers of aquatic ecosystem pollution. The impact of human activities on the environmental is an ongoing and increasing problem. There are many potentially dangerous chemicals that dissolve in water.
Valentina Vladimirovna Slobodskova
doaj   +1 more source

Spatial Context-Based Local Toponym Extraction and Chinese Textual Address Segmentation from Urban POI Data

open access: yesISPRS International Journal of Geo-Information, 2020
Georeferencing by place names (known as toponyms) is the most common way of associating textual information with geographic locations. While computers use numeric coordinates (such as longitude-latitude pairs) to represent places, people generally refer ...
Xi Kuai   +5 more
doaj   +1 more source

A Severi type theorem for surfaces in P^6 [PDF]

open access: yes, 2021
Let X⊂P^N be a projective, non-degenerate, irreducible smooth variety of dimensionn. After giving the definition ofgeneralised OADP-variety (one apparent double point), i.e.
de poi, pietro   +2 more
core   +1 more source

A New Approach to Refining Land Use Types: Predicting Point-of-Interest Categories Using Weibo Check-in Data

open access: yesISPRS International Journal of Geo-Information, 2020
The information of land use plays an important role in urban planning and optimizing the allocation of resources. However, traditional land use classification is imprecise. For instance, the type of commercial land is highly filled with the categories of
Xucai Zhang   +3 more
doaj   +1 more source

Successful Mestrual Regularity and Spontaneous Pregnancies with a Resveratrol-Based Multivitamin Supplement in Women with Idiopathic Premature Ovarian Insufficiency

open access: yesThe EuroBiotech Journal, 2022
Premature ovarian insufficiency (POI) is a clinical syndrome defined by loss of ovarian activity before the age of 40 years and is characterized by menstrual disturbance, follicle stimulating hormone (FSH) concentration above 40 IU/l and infertility.
Vignali Michele
doaj   +1 more source

The avifauna of the Zigoneni dam basin (Argeş county, Romania), observed in 2013 [PDF]

open access: yesTravaux du Muséum National d’Histoire Naturelle “Grigore Antipa”, 2019
Some aspects regarding the breeding of the birds from Zigoneni Basin that belongs to the protected area ROSPA0062 the Dam Basins of the Argeş River are presented in this paper.
Adrian Mestecăneanu
doaj   +3 more sources

On higher Gauss maps [PDF]

open access: yes, 2015
We prove that the general fibre of the i-th Gauss map has dimension m if and only if at the general point the (i+1)-th fundamental form consists of cones with vertex a fixed P^(m−1), extending a known theorem for the usual Gauss map.
Ilardi, Giovanna   +2 more
core   +1 more source

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