Results 41 to 50 of about 106 (94)

Sun-as-a-star variability of Hα and Ca II 854.2 nm lines

open access: yesFrontiers in Astronomy and Space Sciences
Studies of stellar magnetic fields mostly rely on proxies derived from chromospheric lines, typically forming in the UV and shorter wavelengths and therefore accessible only from space based observatories.
Garrett Zills   +3 more
doaj   +1 more source

Preface to the special issue on “Old records for new knowledge”

open access: yesGeoscience Data Journal, Volume 11, Issue 4, Page 357-364, October 2024.
Studying a changing world requires observations going back in time to extend and contextualize our latest scientific knowledge. Old legacy data exist in non‐digital formats. Thus, techniques and methodologies for the preservation, dissemination, interpretation, homogenization, calibration, and use of such legacy data and their associated metadata, as ...
Josep Batlló   +3 more
wiley   +1 more source

Latitude Quenching Nonlinearity in the Solar Dynamo

open access: yesThe Astrophysical Journal
We compare two candidate nonlinearities for regulating the solar cycle within the Babcock–Leighton paradigm: tilt quenching (whereby the tilt of active regions is reduced in stronger cycles) and latitude quenching (whereby flux emerges at higher ...
Anthony R. Yeates   +3 more
doaj   +1 more source

Design of the microelectromechanical logic element based on a comb-drive resonator

open access: yesНаучно-технический вестник информационных технологий, механики и оптики
CMOS technology has nearly reached the physical limits of transistor scaling and exhibits significant operational limitations at extreme temperatures and ionizing radiation.
A. A. Solovev   +2 more
doaj   +1 more source

Dynamics of Subsurface Flows in Solar Active Regions during the 2024 May Storm

open access: yesThe Astrophysical Journal
In 2024 May, the Sun exhibited intense magnetic activity, marked by numerous high-intensity flares resulting from the interaction and merging of NOAA active regions (ARs) 13664 and 13668 in the southern hemisphere and AR 13663 in the northern hemisphere.
B. Lekshmi   +3 more
doaj   +1 more source

System-Level Mathematical Macro-Models of Logic MEMS Gates

open access: yesДоклады Белорусского государственного университета информатики и радиоэлектроники
The relevance of the study is due to the rapid development of microelectromechanical systems (MEMS), which are used as logic elements due to low power consumption, high reliability and the ability to reprogram during operation.
А. А. Solovev   +2 more
doaj   +1 more source

Effectiveness of Search for Unrelated Donor of Hematopoietic Stem Cells using Russian System Bone Marrow Donor Search: Experience of RM Gorbacheva Scientific Research Institute of Pediatric Hematology and Transplantation

open access: yesКлиническая онкогематология, 2017
Background & Aims. The key condition for allogeneic hematopoietic stem cell transplantation (allo-HSCT) is the presence of HLA-compatible related or unrelated donor.
O. A. Makarenko   +9 more
doaj   +1 more source

Reexamining the Power-law Relationship between Global Solar X-Ray Luminosity and Total Unsigned Magnetic Flux

open access: yesThe Astrophysical Journal
The mechanism heating the solar corona remains unclear but is generally hypothesized to involve magnetic fields. One probe of this hypothesis is a statistical study relating coronal emission to magnetic flux. A. A. Pevtsov et al.
Keiji Yoshimura   +2 more
doaj   +1 more source

Temporal and Structural Properties of Sunspot Small Short-living Group and Large Long-living Group Populations

open access: yesThe Astrophysical Journal
We investigate the properties of two types of solar active regions: the small short-living groups (SSGs) and the large long-living groups (LLGs). The combined distribution of areas of active regions is bimodal. When deconvolved, the distributions of each
Yury A. Nagovitsyn   +2 more
doaj   +1 more source

Identification of digital device hardware vulnerabilities based on scanning systems and semi-natural modeling

open access: yesРоссийский технологический журнал
Objectives. The development of computer technology and information systems requires the consideration of issues of their security, various methods for detecting hardware vulnerabilities of digital device components, as well as protection against ...
E. F. Pevtsov   +3 more
doaj   +1 more source

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