Results 41 to 50 of about 6,626,858 (240)

Binary quadratic forms and the factorization method of Gauss

open access: yes, 2021
In Disquisitiones Arithmeticae, Gauss studied binary quadratic forms and introduced a very general version of a composition operator that allows composing even forms of different discriminants and imprimitive forms. Section V of Disquisitiones contains truly revolutionary ideas and involves very complicated computations, sometimes left to the reader ...
Celis, Monica, Almeida, Paulo
openaire   +2 more sources

Chern-Simons--Antoniadis-Savvidy forms and standard supergravity

open access: yes, 2017
In the context of the so called the Chern--Simons--Antoniadis--Savvidy (ChSAS) forms, we use the methods for FDA decomposition in 1-forms to construct a four-dimensional ChSAS supergravity action for the Maxwell superalgebra.
Izaurieta, F, Salgado, P, Salgado, S
core   +2 more sources

2019 updated consensus statement on the diagnosis and treatment of pediatric pulmonary hypertension: The European Pediatric Pulmonary Vascular Disease Network (EPPVDN), endorsed by AEPC, ESPR and ISHLT.

open access: yesThe Journal of Heart and Lung Transplantation, 2019
The European Pediatric Pulmonary Vascular Disease Network is a registered, non-profit organization that strives to define and develop effective, innovative diagnostic methods and treatment options in all forms of pediatric pulmonary hypertensive vascular
G. Hansmann   +15 more
semanticscholar   +1 more source

Detecting Large Concept Extensions for Conceptual Analysis

open access: yes, 2017
When performing a conceptual analysis of a concept, philosophers are interested in all forms of expression of a concept in a text---be it direct or indirect, explicit or implicit.
C Dutilh Novaes   +9 more
core   +1 more source

CONTENT, FORMS AND METHODS OF LEARNING THE ACADEMIC DISCIPLINES ON THE CIRCULAR ECONOMY: EXPERIENCE OF UKRAINE

open access: yesОсвітологія, 2022
The results of the analysis of the content of educational disciplines for the training of specialists in the circular economy indicate the formation of variable competences of specialists, which depends on the educational level, the specificity of the ...
Oleksii Sysoiev
doaj   +1 more source

Temporal Trends in the Swedish HIV-1 Epidemic: Increase in Non-B Subtypes and Recombinant Forms over Three Decades

open access: yesPLoS ONE, 2014
Background HIV-1 subtype B (HIV-1B) still dominates in resource-rich countries but increased migration contributes to changes in the global subtype distribution. Also, spread of non-B subtypes within such countries occurs.
U. Neogi   +6 more
semanticscholar   +1 more source

Forms, Methods and Directions of Digitalization of the Economy

open access: yesEconomic Herald of the Donbas, 2020
The article reveals the role and features of the digitalization of the economy, which is an objective prerequisite for the innovative development of the economic system of the state, as well as examines the results and determines the prospects for the implementation of the digital economy in the countries in the post-Soviet space, primarily in the ...
K. Pavlov, N. Asadullina
openaire   +2 more sources

Systematic Chemoenzymatic Synthesis of O-Sulfated Sialyl Lewis x Antigens. [PDF]

open access: yes, 2015
O-Sulfated sialyl Lewis x antigens play important roles in nature. However, due to their structural complexity, they are not readily accessible by either chemical or enzymatic synthetic processes.
Chen, Xi   +8 more
core   +1 more source

Some new canonical forms for polynomials

open access: yes, 2013
We give some new canonical representations for forms over $\cc$. For example, a general binary quartic form can be written as the square of a quadratic form plus the fourth power of a linear form.
Alexander   +12 more
core   +2 more sources

In Vitro and In Vivo Test Methods for the Evaluation of Gastroretentive Dosage Forms

open access: yesPharmaceutics, 2019
More than 50 years ago, the first concepts for gastroretentive drug delivery systems were developed. Despite extensive research in this field, there is no single formulation concept for which reliable gastroretention has been demonstrated under different
Felix Schneider   +2 more
doaj   +1 more source

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