A new mechanism for generating a bolus within a double layer following Scott Russell

2021 ◽  
Author(s):  
Johan Fourdrinoy ◽  
Julien Dambrine ◽  
Madalina Petcu ◽  
Morgan Pierre ◽  
Germain Rousseaux
Keyword(s):  
Surface Deformation ◽  
Wave Train ◽  
Surrounding Medium ◽  
Negative Polarity ◽  
National Academy Of Sciences ◽  
Dispersive Waves ◽  
Dual Nature ◽  
Free Surface Deformation ◽  
Academy Of Sciences ◽  
Dead Water

<p>While seeking to revisit an old experiment of John Scott Russell, we discovered a new mechanism for generating a non-shoaling bolus (an ovoid coherent mass of recirculating mixed fluids immerged in a surrounding medium/a of different density/ies) propagating along a pycnocline. In a study about dead-water (Fourdrinoy et al. 2020), a wave resistance phenomenon induced by internal waves formation at the interface between waters of different densities, we modified the setup used by Scott Russell. The Scottish engineer studied the formation and propagation of dispersive waves when an object is removed from a laterally confined open channel with a shallow layer of water. The “vacuum” created by the mass removal generates a linear dispersive free surface deformation with a front of negative polarity followed by a wave train. If we extend this configuration to a two-layers stratification, we can observe a linear dispersive wave with negative polarity à la Scott Russell, propagating along the interface. In addition, the removal of the object generates under certain conditions a bolus which induces a mixing zone and a gradient transition layer. We will present this new method of boluses creation, as well as an experimental characterization with space-time diagrams thanks to a subpixel detection procedure.</p><p>The dual nature of the dead-water phenomenology: Nansen versus Ekman wave-making drags.<br>Johan Fourdrinoy, Julien Dambrine, Madalina Petcu, Morgan Pierre and Germain Rousseaux.<br>Proceedings of the National Academy of Sciences, Volume 117, Issue 29, p. 16739-16742, July 2020.</p>

Materials for the history of the gospel-Baptist movement in Ukraine

1996 ◽  
pp. 4-15
Author(s):  
S. Golovaschenko ◽  
Petro Kosuha
Keyword(s):  
Large Scale ◽  
Religious Studies ◽  
Theological Seminary ◽  
National Academy Of Sciences ◽  
Evangelical Christians ◽  
Evangelical Christian ◽  
First Results ◽  
History Of ◽  
Fruitful Cooperation ◽  
Academy Of Sciences

The report is based on the first results of the study "The History of the Evangelical Christians-Baptists in Ukraine", carried out in 1994-1996 by the joint efforts of the Department of Religious Studies at the Institute of Philosophy of the National Academy of Sciences of Ukraine and the Odessa Theological Seminary of Evangelical Christian Baptists. A large-scale description and research of archival sources on the history of evangelical movements in our country gave the first experience of fruitful cooperation between secular and church researchers.

The phenomenon of religion

1996 ◽  
pp. 45-46
Author(s):  
Borys Lobovyk
Keyword(s):  
Religious Studies ◽  
National Academy Of Sciences ◽  
Historical Phenomenon ◽  
Academy Of Sciences

"PHENOMENON OF RELIGION" - under this name on June 20-21, 1996, the All-Ukrainian Colloquium, convened by the Department of Religious Studies and the Ukrainian Association of Religious Studies took place at the Institute of Philosophy of the National Academy of Sciences of Ukraine. The purpose of the colloquium is to discuss the topical issues of Ukrainian religious studies concerning the nature, essence and functionality of religion as a social and historical phenomenon.

First Ricin Readings

1998 ◽  
pp. 39-41
Author(s):  
Oleksandr N. Sagan
Keyword(s):  
Religious Studies ◽  
National Academy Of Sciences ◽  
Medical College ◽  
Religious Consciousness ◽  
Medical Academy ◽  
65Th Anniversary ◽  
Academy Of Sciences

On April 22, 1998, on the occasion of the 65th anniversary of the publication of Arsen Rychinsky's "Problems of Ukrainian Religious Consciousness" in Kremenets (Ternopil region), the First Rychinsky reading was held. The organizers of the conference were: Ukrainian Association of Religious Studies, Ternopil Medical Academy named after them. I.Gorbachevsky, Department of Religious Studies at the Institute of Philosophy named after G.S. Skovoroda, National Academy of Sciences of Ukraine, Kremenets Medical College.

Christianity and culture: history, tradition, modernity

1997 ◽  
pp. 65-66
Author(s):  
V. Klymov
Keyword(s):  
Religious Studies ◽  
National Academy Of Sciences ◽  
Culture History ◽  
State Administration ◽  
State Pedagogical ◽  
State Pedagogical Institute ◽  
The Many ◽  
Academy Of Sciences ◽  
Cultural Experts ◽  
Practical Conference

Under this name, on November 20-21, the All-Ukrainian Scientific and Practical Conference took place in Poltava, which became one of the many events devoted to the 2000th anniversary of the Nativity of Christ. Its organizers were Poltava Regional State Administration, Department of Religious Studies at the Institute of Philosophy named after G. Skovoroda, National Academy of Sciences of Ukraine, Poltava State Pedagogical Institute. VG Korolenko. The conference was attended by scholars: religious scholars, historians, philosophers, ethnographers, cultural experts, teachers from Kyiv, and many regions of Ukraine.

Traditional, Pharmacological and Patenting Potential of Neem (Azadirachta indica): A Review

2017 ◽  
Vol 3 (4) ◽  
pp. 383-391
Author(s):  
Mohd Asif Khan ◽  
Shashi Bhooshan Tiwari ◽  
Himanshu Gupta ◽  
Huma Noor
Keyword(s):  
Azadirachta Indica ◽  
Indian Subcontinent ◽  
National Academy Of Sciences ◽  
Neem Tree ◽  
Commercial Plant ◽  
Pharmacological Potential ◽  
Pharmacologically Active ◽  
In The Beginning ◽  
Prevention And Cure ◽  
Academy Of Sciences

Since ancient time, herbal drugs were highly used in the prevention and cure of various human illnesses. In India, Azadirachta indica being commonly known as Neem or Margosa is one of the multi-functional trees; belonging to Meliaceae family. In 1992, the US National Academy of Sciences was published a report entitled ‘Neem- a tree for solving global problems’. It is still considered as ‘village dispensary’ throughout the India. There are two species of Azadirachta which have been investigated; Azadirachta indica that is found in the Indian subcontinent and Azadirachta excelsa Kack that is homegrown to Indonesia and Philippines. A large number of pharmacologically active substances have been identified and isolated from the different parts of neem including azadirachtin, meliacin, gedunin, salanin, nimbin, valassin and various other components which are derived from these main compounds. Many different studies have been evaluated and authenticated for its various traditional and pharmacological activities like itching, leprosy, wound healing, spermicidal, anti-inflammatory, insecticidal, antidiabetic and analgesic etc. In the beginning of 1979, patenting on neem was started by CSIR to separate the active compounds from neem oil. Its great implantation fights with soil erosion, global warming, deforestations and desertification world-wide. In 2002, World Neem Conference raised the neem tree as an industrial or commercial plant. This review is going to explore comprehensively; traditional, pharmacological potential along with patenting, environmental & industrial significant of various parts of neem tree with safety concerns.

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