Studying regularities of functioning of passive droplet-sheet collectors in radiator systems under open space conditions

2014 ◽  
Vol 61 (14) ◽  
pp. 1021-1029
Author(s):  
A. A. Koroteev ◽  
E. S. Popushina ◽  
A. B. Samsonov
Keyword(s):  
Open Space ◽  
Space Conditions ◽  
Regularities Of Functioning

scholarly journals Análise do comportamento oscilatório de gotas de fluidos de van der Waals sob condições de microgravidade usando o método Smoothed Particle Hydrodynamics

2019 ◽  
Vol 41 ◽  
pp. 9
Author(s):  
Géssica Ramos da Silva ◽  
Maicon De Paiva Torres ◽  
Marciana Lima Góes ◽  
Helio Pedro Amaral Souto
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Open Space ◽  
Van Der Waals ◽  
Oscillatory Behavior ◽  
Smoothing Function ◽  
Sph Method ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Smoothed Particle Hydrodynamics Method ◽  
Space Conditions

In the present work, the Smoothed Particle Hydrodynamics method (SPH) is employed in the modeling of a two-dimensional drop formation problem, without an external atmosphere, using a van der Waals fluid. In addition, influences of Reynolds number, initial aspect ratio and Péclet number on drops oscillatory behavior are studied in open space conditions with zero gravity assumption. In view of the most recent researches in drops formation field using the SPH method, a hyperbolic kernel is applied to all simulations in order to ensure uniform drops liquid formation, i.e., without particle agglomeration. Through the usage of this smoothing function the tensile instability is reduced, avoiding unnecessary numerical treatments.

A film flow in a drop catcher in space conditions

2007 ◽  
Vol 5 ◽  
pp. 235-240
Author(s):  
A.A. Koroteev ◽  
A.N. Osiptsov ◽  
E.S. Popushina
Keyword(s):  
Steady State ◽  
Open Space ◽  
Film Flow ◽  
Numerical Study ◽  
Film Surface ◽  
Inlet Section ◽  
Outlet Channel ◽  
Flow Parameters ◽  
State Regime ◽  
Space Conditions

A non-isothermal film flow is considered, which is formed on the inner surface of a conical drop catcher on whose inlet a uniform stream of a droplet medium is supplied under open space conditions. For the regime of inertial deposition of droplets, under the assumption of small relative thickness of the film and the absence of droplets rebounced from the film surface asymptotic models of steady-state film flow are constructed and studied. For a slow isothermal flow, the shape and parameters of the film are found analytically. For a general case, a parameteric numerical study ща the velocity and temperature distributions, as well as the film thickness, is performed. The flow parameters in the inlet section of the outlet channel are determined, and the conditions required for the steady-state regime of drop catcher operation are found.

Oak (Quercus robur L.) seedling responses to a realistic increase in UV-B radiation under open space conditions

Chemosphere ◽  
1998 ◽  
Vol 36 (4-5) ◽  
pp. 841-845 ◽  
Author(s):  
F. Antonelli ◽  
F. Bussotti ◽  
D. Grifoni ◽  
P. Grossoni ◽  
B. Mori ◽  
...  
Keyword(s):  
Quercus Robur ◽  
Open Space ◽  
Space Conditions

The study of Terrestrial microorganisms in space conditions and search for extraterrestrial microorganisms on space bodies

2020 ◽  
Author(s):  
Gali Garipov ◽  
Mikhail Panasyuk ◽  
Sergey Svertilov ◽  
Ivan Konyukhov ◽  
Sergey Pogosyan ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Open Space ◽  
Interplanetary Space ◽  
Artificial Satellites ◽  
Earth Space ◽  
Near Earth Space ◽  
The Earth ◽  
Space Objects ◽  
Space Conditions ◽  
Cosmic Origin

<p>The aim of the researches is detecting and exploration of microorganisms of Terrestrial and Cosmic origin.</p> <p>Microorganisms are supposed to be studied in the near-earth space on space objects of manmade origin and on the space bodies of Solar system in the extraterrestrial space, including   planets.</p> <p>For research, it is proposed to use the properties of microorganisms to emit a fluorescent glow when they irradiated with flashes of light causing their fluorescence.</p> <p>One of the research tasks is to search for terrestrial microorganisms that have occurred in space from Earth, as well as research of the survival of the terrestrial microorganisms in space conditions which shall be placed in special laboratories on board of the microsatellites on the Earth.</p> <p>The second task is to search for microorganisms on space bodies in interplanetary space by remote sensing of the surface of space bodies by flashes of light.</p> <p>To solve the first problem of this work is considered an example of a micro-laboratory for the study of terrestrial microorganisms located in space conditions in near-earth space on microsatellites.</p> <p> To solve the second problem, is considered an example of remote sensing equipment of space objects for searching for microorganisms on space bodies in interplanetary space which is installed on board of microsatellite created for far space exploration.</p> <p>Concerning to the first task it is shown that in automatic laboratories on microsatellites, it is possible to study the dynamics of microorganisms survival in space in conditions with a fixed habitat similar to earth's and in a changing environment that adequate the entry of microorganisms into open space and return them back to the earth conditions.</p> <p>Concerning to the second task it is shown that colonies of microorganisms on the surface of space bodies can be detected and studied from the orbits of their artificial satellites or from flight path trajectories near the space body at distances in order 200 km, and single microorganisms can be detected and studied at distances in order hundreds of meters</p>

Development of high-performance objective lens polepiece for ultrahigh resolution Analytical Electron Microscope

1993 ◽  
Vol 51 ◽  
pp. 254-255
Author(s):  
K. Fukushima ◽  
T. Kaneyama ◽  
F. Hosokawa ◽  
H. Tsuno ◽  
T. Honda ◽  
...  
Keyword(s):  
Electron Microscope ◽  
High Performance ◽  
Open Space ◽  
Materials Science ◽  
Objective Lens ◽  
Ultrahigh Resolution ◽  
Science Field ◽  
Specimen Holder ◽  
Analytical Electron ◽  
Analytical Electron Microscope

Recently, in the materials science field, the ultrahigh resolution analytical electron microscope (UHRAEM) has become a very important instrument to study extremely fine areas of the specimen. The requirements related to the performance of the UHRAEM are becoming gradually severer. Some basic characteristic features required of an objective lens are as follows, and the practical performance of the UHRAEM should be judged by totally evaluating them.1) Ultrahigh resolution to resolve ultrafine structure by atomic-level observation.2) Nanometer probe analysis to analyse the constituent elements in nm-areas of the specimen.3) Better performance of x-ray detection for EDS analysis, that is, higher take-off angle and larger detection solid angle.4) Higher specimen tilting angle to adjust the specimen orientation.To attain these requirements simultaneously, the objective lens polepiece must have smaller spherical and chromatic aberration coefficients and must keep enough open space around the specimen holder in it.

Changing Places

2019 ◽  
Author(s):  
John MacDonald ◽  
Charles Branas ◽  
Robert Stokes
Keyword(s):  
Open Space ◽  
Urban Landscape ◽  
Health And Safety ◽  
Well Being ◽  
City Life ◽  
New Science ◽  
Science And Art ◽  
Working Together ◽  
Scientific Testing ◽  
Large Groups

The design of every aspect of the urban landscape—from streets and sidewalks to green spaces, mass transit, and housing—fundamentally influences the health and safety of the communities who live there. It can affect people's stress levels and determine whether they walk or drive, the quality of the air they breathe, and how free they are from crime. This book provides a compelling look at the new science and art of urban planning, showing how scientists, planners, and citizens can work together to reshape city life in measurably positive ways. It demonstrates how well-designed changes to place can significantly improve the well-being of large groups of people. The book argues that there is a disconnect between those who implement place-based changes, such as planners and developers, and the urban scientists who are now able to rigorously evaluate these changes through testing and experimentation. It covers a broad range of structural interventions, such as building and housing, land and open space, transportation and street environments, and entertainment and recreation centers. Science shows we can enhance people's health and safety by changing neighborhoods block-by-block. The book explains why planners and developers need to recognize the value of scientific testing, and why scientists need to embrace the indispensable know-how of planners and developers. It reveals how these professionals, working together and with urban residents, can create place-based interventions that are simple, affordable, and scalable to entire cities.

Analysis of Inter-Satellite Optical Wireless Communication System

2017 ◽  
Vol 7 (10) ◽  
pp. 10
Author(s):  
Rajbir Singh
Keyword(s):  
Wireless Communication ◽  
Optical Networks ◽  
Data Transmission ◽  
High Speed ◽  
Open Space ◽  
Communication Link ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
High Speed Data ◽  
Speed Data Transmission

Optical networks are bandwidth efficient networks are used for long haul communication providing seamless data transfer. For high speed data transmission in open space between different satellites, Inter-satellite Optical wireless communication (IsOWC) is widely used .In this paper we have evaluated the performance of IsOWC communication link for high speed data transmission .The performance of the system is evaluated on the basis of qualitative parameters such as Q-factor and BER using optisystem simulator.

ANALISIS PENGARUH PEMBANGUNAN JALAN LAYANG JANTI TERHADAP PERKEMBANGAN TATA RUANG KAWASAN JANTI STUDI KASUS : KAWASAN JANTI, DESA CATURTUNGGAL, KABUPATEN SLEMAN, D. I. YOGYAKARTA

2017 ◽  
Vol 11 (3) ◽  
pp. 255
Author(s):  
Jeky El Boru
Keyword(s):  
Road Network ◽  
Open Space ◽  
Qualitative Description ◽  
Analysis Method ◽  
Open Spaces ◽  
The Road ◽  
Before And After ◽  
Linkage Method ◽  
The Impact ◽  
Parking Place

Abstract: This research aims to analyze the impact of Janti Flyover Construction toward the growth of layout at Janti Urban Area, including structured space, open space, and linkage. Method used for data collecting are observation, air photograph monitoring, and interview, whereas the analysis method is qualitative description, which is the superimposed method of two layers, that are the layout condition before and after flyover construction. The result shows that the impact of Janti Flyover construction can be seen on building mass (solid), the increasing number of open spaces, including the road network, parking place, and park, whereas the relation between spaces, visually and structurally, can be seen on the growth of buildings which have new shapes and styles, therefore the performance of the overall building does not have a proportional shape. Considering Janti Street at the collective relation, its role is getting stronger as the main frame road network.Keywords: Flyover construction, layout changing, Janti AreaAbstrak: Penelitian ini bertujuan untuk menganalisis pengaruh pembangunan Jalan Layang Janti terhadap perkembangan tata ruang Kawasan Janti, meliputi ruang terbangun, ruang terbuka, serta hubungan antar ruang (“linkage”). Metode pengumpulan data dilakukan melalui observasi, pengamatan foto udara, dan wawancara; sedangkan metode analisis melalui deskripsi secara kualitatif yang berupa “superimposed method” dari dua lapisan kondisi lahan, yakni kondisi tata ruang sebelum dan sesudah pembangunan jalan layang. Hasil penelitian menunjukkan bahwa pengaruh pembangunan Jalan Layang Janti terdapat pada massa bangunan (“solid”), pertambahan ruang terbuka yang berupa jaringan jalan, parkir, dan taman; sedangkan pada hubungan antar ruang ̶ secara visual dan struktural ̶ yakni tumbuhnya bangunan dengan bentuk dan gaya baru, sehingga bentuk tampilan bangunan secara keseluruhan tidak proporsional. Pada hubungan kolektif, Jalan Janti semakin kuat perannya sebagai kerangka utama jaringan jalan.Kata kunci : Pembangunan jalan layang, tata ruang, Kawasan Janti

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