scholarly journals River-ice Fabrics: Preliminary Results

1971 ◽  
Vol 10 (58) ◽  
pp. 151-152 ◽  
Author(s):  
N.P. Lasca
Keyword(s):  
Preliminary Data ◽  
Stream Flow ◽  
River Ice ◽  
Ice Crystal ◽  
Preliminary Results ◽  
Ice Surface ◽  
Crystal Orientations ◽  
Response To Stress ◽  
Ice Fabrics

AbstractPreliminary data indicate that fabric is developed in river ice. Crystal orientations are usually sub-parallel to the ice surface, and develop partly in response to stress generated by stream flow.

scholarly journals River-ice Fabrics: Preliminary Results

1971 ◽  
Vol 10 (58) ◽  
pp. 151-152
Author(s):  
N.P. Lasca
Keyword(s):  
Preliminary Data ◽  
Stream Flow ◽  
River Ice ◽  
Ice Crystal ◽  
Preliminary Results ◽  
Ice Surface ◽  
Crystal Orientations ◽  
Response To Stress ◽  
Ice Fabrics

AbstractPreliminary data indicate that fabric is developed in river ice. Crystal orientations are usually sub-parallel to the ice surface, and develop partly in response to stress generated by stream flow.

scholarly journals The Microstructure of Yellow River Ice in the Freezing Period

Crystals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 484
Author(s):  
Yu Deng ◽  
Zongkun Li ◽  
Juan Wang ◽  
Lukai Xu
Keyword(s):  
Yellow River ◽  
Calculation Model ◽  
Theoretical Research ◽  
River Ice ◽  
The Yellow River ◽  
Test Results ◽  
Ice Crystal ◽  
Ice Surface ◽  
Ice Disaster ◽  
Ice Crystal Size

Accurately determining true ice microstructure and material parameters is a basis for ice disaster theoretical research on the Yellow River. In this work, natural Yellow River ice was collected, and ice crystals parallel and perpendicular to the ice surface were photographed using an orthogonal polarizing mirror. Morphologies of ice microstructure were extracted, and equivalent ice grain sizes were calculated. The results show that Yellow River ice mainly consists of granular ice and columnar ice and vary greatly in different time and space ranges. The ice crystal shape is irregular, and the ice crystal size is larger span, and mainly between 1 mm and 10 mm. Ice crystal initial defects come from bubbles, sediment particles, impurities, and microcracks; among them, bubbles are the most common and have a relatively large impact. In addition, a calculation model of the Yellow River ice microstructure was constructed according to the ice crystal test results. Based on the experimental data and numerical model, the obtained Yellow River ice parameters provide help for analyzing ice disaster mechanisms along the Yellow River.

Preliminary data of hereditary constitutional studies in endemic goiter in the Mariob region

1930 ◽  
Vol 26 (3) ◽  
pp. 290-299
Author(s):  
M. P. Andreev ◽  
M. G. Ul'yanova
Keyword(s):  
Preliminary Data ◽  
Endemic Goiter ◽  
Journal Article ◽  
Medical Community ◽  
Preliminary Results ◽  
Enormous Amount ◽  
The Future

In the summer of 1928 and 1929, we had to work on an expedition to study the endemic goiter in the Mariob region. It is impossible to cover in a journal article the enormous amount of material that these expeditions brought (mainly in 1929), its processing is still ongoing and the publication of data in special works of the expedition is a matter of the future; but already at the present time it is possible to share some preliminary results that are of interest to a wide medical community.

scholarly journals Mini Review Immunological Consequences of Immunization With COVID-19 mRNA Vaccines: Preliminary Results

2021 ◽  
Vol 12 ◽  
Author(s):  
Andrea Lombardi ◽  
Giorgio Bozzi ◽  
Riccardo Ungaro ◽  
Simone Villa ◽  
Valeria Castelli ◽  
...  
Keyword(s):  
Preliminary Data ◽  
Vaccine Efficacy ◽  
Neutralizing Antibodies ◽  
Cellular Response ◽  
Safety And Efficacy ◽  
Specific Antibodies ◽  
Preliminary Results ◽  
Efficacy Profile

Background: BNT162b2 and mRNA-1273 are the two recently approved mRNA-based vaccines against COVID-19 which has shown excellent safety and efficacy. Preliminary data about specific and neutralizing antibodies is available covering the first 100 days after vaccination.Methods: We reviewed all the publications regarding the immunologic consequences of BNT162b2 and mRNA-1273 vaccination. A summary of specific antibodies concentration and neutralizing antibodies titers elicited by each vaccine is provided.Results: BNT162b2 and mRNA-1273 displayed a reassuring safety and efficacy profile, with the latter above 94%. They can elicit specific antibodies titers and neutralizing antibodies concentrations that are far superior from those observed among COVID-19 human convalescent serum, across a wide span of age, for at least 100 days after vaccination. Moreover, the vaccine-induced T cellular response is oriented toward a TH1 response and no evidence of vaccine-enhanced disease have been reported.Discussion: BNT162b2 and mRNA-1273 can elicit specific antibodies titers and neutralizing antibodies concentrations above those observed among COVID-19 human convalescent serum in the first 100 days after vaccination. Data about vaccine efficacy in those with previous COVID-19 or immunocompromised is still limited.

scholarly journals A Comparison of Ice Fabrics and Textures at Camp Century, Greenland and Byrd Station, Antarctica

1982 ◽  
Vol 3 ◽  
pp. 118-124 ◽  
Author(s):  
Susan L. Herron ◽  
Chester C. Langway
Keyword(s):  
Short Interval ◽  
Ice Cores ◽  
Remarkable Similarity ◽  
Single Maximum ◽  
Crystal Orientations ◽  
Degree Of Orientation ◽  
Break Up ◽  
Ice Fabrics ◽  
High Degree

A comparison of the crystalline texture and fabric of the two deep cores to bedrock from Camp Century, Greenland, and Byrd station, Antarctica, reveals striking similarities. Each core exhibits a fabric profile which progresses from depositional fabrics at shallow depths through multi-maxima transitional stages into single maximum distributions. The major difference between the two cores occurs near the base where the Camp Century fabrics maintain a high degree of orientation while the Byrd station fabrics break up into a diamond pattern. The most remarkable similarity between the two profiles occurs at the glacial-interglacial transition where crystal sizes decrease and crystal orientations strengthen significantly over a very short interval. Similar changes occur in other deep ice cores, thus indicating the possibility that the late Wisconsin ice has a unique crystallographic signature.

Preliminary data on dinocysts of the upper toarcian – lower aalenian of Northeastern Siberia

2020 ◽  
Author(s):  
Anna A. Goryacheva ◽  
Keyword(s):  
Preliminary Data ◽  
Middle Jurassic ◽  
Preliminary Results ◽  
Unicellular Algae ◽  
Natural Exposure ◽  
Northeastern Siberia

The article presents preliminary results of palynological studies of the Lower-Middle Jurassic deposits, uncovered by the natural exposure of 7A on the Kelimyar river and represented by the Kelimyar Formation. The Toarian biostraton with Valvaeodinium aquilonium is identified in the section. As a result of studies in the Lower Aalenian samples, only rare dinocysts taxa were identified that did not allow to divide the upper part of the section on this group of unicellular algae.

scholarly journals An Improved Method for Determining Ice Fabrics

1971 ◽  
Vol 10 (58) ◽  
pp. 133-138 ◽  
Author(s):  
J.R. Hill ◽  
N.P. Lasca
Keyword(s):  
Ice Crystal ◽  
Improved Method ◽  
Ice Fabrics ◽  
Universal Stage

AbstractIn ice-fabric studies, use of an accessory plate is necessary in conjunction with the Rigsby universal stage to discriminate between thea-andc-axes of an ice crystal when the orientation of thec-axis is parallel or nearly parallel to the stage. The techniques described permit orientation of thec-axis regardless of its orientation.

TERNARY REACTIONS IN 197AU + 197AU COLLISIONS REVISITED

2007 ◽  
Vol 16 (02) ◽  
pp. 511-515 ◽  
Author(s):  
I. SKWIRA-CHALOT ◽  
K. SIWEK-WILCZYŃSKA ◽  
J. WILCZYŃSKI ◽  
F. AMORINI ◽  
A. ANZALONE ◽  
...  
Keyword(s):  
Binary System ◽  
Preliminary Data ◽  
Complete Data ◽  
Angular Range ◽  
Fission Reactions ◽  
Preliminary Results ◽  
Strongly Damped ◽  
Forward Hemisphere ◽  
System Mechanism

Ternary events originating from the 197 Au + 197 Au reaction at 15 MeV/nucleon, studied by using the multidetector array CHIMERA at LNS Catania, have been collected in almost complete 2π range of the forward hemisphere of CHIMERA thus extending the angular range of our previously reported preliminary data. Energy- and time calibrations for heavy fragments at large angles were supplemented with an analysis of coincidence events of binary strongly damped reactions. Contrary to the previous preliminary results, the new complete data clearly show presence of sequential fission processes in which one of Au -like nuclei undergoes fission after re-separation of the primary binary system. Mechanism of these two types of reactions observed in our data, sequential fission reactions and prompt ternary processes, are presently studied using comparisons with predictions of the stochastic BNV model of Baran, Colonna and Di Toro and the QMD model of Łukasik.

scholarly journals Preliminary data on preservation of the cultural layer of the Middle Paleolithic site of Sukhaya Mechetka (excavation 1)

2021 ◽  
pp. 25-46
Author(s):  
Alisa Larionova ◽  
Keyword(s):  
Data Analysis ◽  
Qualitative Analysis ◽  
Preliminary Data ◽  
Control Point ◽  
Middle Paleolithic ◽  
Eastern European ◽  
Cultural Layer ◽  
Paleolithic Site ◽  
Detailed Understanding ◽  
Preliminary Results

The Sukhaya Mechetka Middle Paleolithic site which was excavated over a wide area (around 650 m2) is one of few Eastern European sites where 3D fixation of every find was done. The study is focused on estimation of cultural layer preservation in the excavation 1. This yielded possibility to define zones of different production activities within homogeneous horizons. The analysis of archaeostratigraphy demonstrated homogeneity of the most parts of cultural horizon. While its thickness usually varies from 5 to 35 cm in few cases it reaches 105 cm. It is suggested that most areas with disturbed cultural horizons are associated with a shift of control point or related near the ravine zone. This article presents preliminary results, research will continue. The archaeostratigraphy analysis for excavation 2, refitting data analysis, field documentation from the personal archive of S.N. Zamyatnin, quantitative and qualitative analysis of the composition of finds within different zones of the site will allow a more detailed understanding the problem posed.

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