Results 51 to 60 of about 5,416,068 (411)

Perturbative Dynamics of Fractional Strings on Multiply Wound D-strings

open access: yes, 1996
Fractional strings in the spectrum of states of open strings attached to a multiply wound D-brane is explained. We first describe the fractional string states in the low-energy effective theory where the topology of multiple winding is encoded in the ...
Akikazu Hashimoto   +1 more
core   +2 more sources

International Laboratory Comparison of Influenza Microneutralization Assays for A(H1N1) pdm09, A(H3N2), and A(H5N1) Influenza Viruses by CONSISE [PDF]

open access: yes, 2015
The microneutralization assay is commonly used to detect antibodies to influenza virus, and multiple protocols are used worldwide. These protocols differ in the incubation time of the assay as well as in the order of specific steps, and even within ...
Engelhardt, OG   +9 more
core   +1 more source

Design considerations for virtual laboratories: A comparative study of two virtual laboratories for learning about gas solubility and colour appearance

open access: yesEducation and Information Technologies : Official Journal of the IFIP technical committee on Education, 2019
Building a virtual laboratory for teaching and learning is a highly complex process, incorporating diverse areas such as interaction design, visualisation, and pedagogy.
B. Stahre Wästberg   +5 more
semanticscholar   +1 more source

Contribution of PEPFAR-Supported HIV and TB Molecular Diagnostic Networks to COVID-19 Testing Preparedness in 16 Countries

open access: yesEmerging Infectious Diseases, 2022
The US President’s Emergency Plan for AIDS Relief (PEPFAR) supports molecular HIV and tuberculosis diagnostic networks and information management systems in low- and middle-income countries.
Erin Rottinghaus Romano   +54 more
doaj   +1 more source

Ward Identities in Two-Dimensional String Theory

open access: yes, 1992
I study the Ward identities of the $w_\infty$ symmetry of the two-dimensional string theory. It is found that, not just an isolated vertex operator, but also a number of vertex operators colliding at a point can produce local charge non-conservation. The
Igor R. Klebanov   +1 more
core   +2 more sources

Should archaeologists care about 14C inter-comparisons? Why? A summary report on SIRI [PDF]

open access: yes, 2017
Radiocarbon (14C) dating is used widely in many projects as a basis for the creation and testing of chronological constructs. 14C measurements are by their nature complex and the degree of sample pretreatment varies considerably depending on the material.
Cook, G.T., Naysmith, P., Scott, E.M.
core   +1 more source

Revised guidelines for good practice in IVF laboratories (2015).

open access: yesHuman Reproduction, 2016
STUDY QUESTION Which recommendations can be provided by the European Society of Human Reproduction and Embryology Special Interest Group (ESHRE SIG) Embryology to support laboratory specialists in the organization and management of IVF laboratories and ...
M. J. de Los Santos   +10 more
semanticscholar   +1 more source

Population and species neighbor identity impact trait–trait relationships and plant performance

open access: yesPopulation Ecology, EarlyView.
We evaluated how populations and species identity influence plant performance and trait outcomes in mixtures, and assessed trait variation among populations of two forb species native to the western United States (Dieteria canescens and Heterotheca villosa) following three interaction treatments (single‐population monoculture, two‐population mixture ...
Alicia J. Foxx   +2 more
wiley   +1 more source

Standards for the Integration of Online Laboratories With Learning Management Systems

open access: yesIEEE Access, 2023
Laboratory work is essential in most applied science and engineering specific coursers. The continuous advances in Information and Communication Technologies be able the use of online laboratories (OLs).
Ildefonso Ruano   +3 more
doaj   +1 more source

Unitarity Relations in c=1 Liouville Theory

open access: yes, 1992
We consider the S-matrix of c=1 Liouville theory with vanishing cosmological constant. We examine some of the constraints imposed by unitarity. These completely determine (N,2) amplitudes at tree level in terms of the (N,1) amplitudes when the plus ...
David A. Lowe, Joseph Henry Laboratories
core   +2 more sources

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