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  Subjects -> AERONAUTICS AND SPACE FLIGHT (Total: 124 journals)
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Research & Reviews : Journal of Space Science & Technology
Number of Followers: 20  
 
  Full-text available via subscription Subscription journal
ISSN (Print) 2321-6506 - ISSN (Online) 2321-2837
Published by STM Journals Homepage  [67 journals]
  • Advanced x-Ray Analysis for Less-Crystalline and Complex Materials

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      Authors: Prantik Mukhopadhyay
      Pages: 1 - 6
      Abstract: An effort to manufacture materials with the least and precise radar signature for stealth and controlled guidance respectively, essentially uses advanced techniques to characterize materials, for detecting crystal confinement in still smaller volumes, to estimate entity sizes, unwanted noise and structure factors. Raison d’etre for selection of advanced and special materials with less crystallinity, combined with precise control over weathering, to minimize crystal developments, for acquiring stealth and targeting with an extended speed of hypersonic vehicles, deserve scientific derivatives of energetics and kinetics.
      PubDate: 2022-11-19
      Issue No: Vol. 11, No. 2 (2022)
       
  • What Every Person Must Know About the Preliminary of String Theories to
           Evolve All Super Clusters, Galaxies, Stars, Planets, Planetesimals in the
           Universe

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      Authors: Rupak Bhattacharya, Dr.Pranab Kumar Bhattacharya, Upasana Bhattacharya, Ritwik Bhattacharya, Aiyshi Mukherjee, Rupsha Bhattacharya, Debashish Mukherjee, Dalia Mukherjee, Hindol Banerjee
      Pages: 7 - 21
      Abstract: The basic things of string theory say that we live in an accelerating and ever expanding universe today. String theory also supports the inflation theory of the Big Bang, where a period of rapid expansion happened in the history of the early Universe. Most of the theories in string theory are focused on understanding a theory of broken Supersymmetry. Only after following conditions are met is destroyed would De-Sitter space appear in the String theory. Thus, in order to keep the universe's stability, we have to meet the challenges posed by collapsing the supersymmetry in the string theory. In String theory, vacuum (voids) was created along with N≥ 2 supersymmetry; there may be flat universes or modules. The energy as we go along three directions in space time (as it is in scalar field theory), there are rather many flat directions or dimensions in string theory. In field theory, the space is remaining constant and in fact vanishes immediately. But there are 100 flat directions in compactification in string theory. The flat directions or dimensions are however very bad in Big Bang standard model cosmology. Flat directions cause however many problems in the standard Big Bang model. The big question to us is that, does String theory allows the De-sitter universe, -a Universe with negative cosmological constant to anti De-sitter space and inflation theory of Big Bang' It is known that De-sitter space can only arise if and when Super symmetry is broken. In the string theory N≥2 Supersymmetry there are many flat directions or many space time dimensions. The energy as we go along, then these spaces is a constant and intact vanishes identically and these directions are therefore bad news from the part of cosmology. Cosmologically flat directions also ruin successful prediction of nucleosynthesis later. However a new class of string compactification called "flux compactification" are there. As predicted by the quantum physics, additional important theoretical contributions curl up in this compactification, and small size impulses are activated alongside the compactified orientations. These fluxes have included a finer form generalisation of the magnetic flux in electromagnetic theory, activating charges and the prospective in modular space, causing new minima to appear in areas or field spaces where the prospective can be computed with control.
      PubDate: 2022-11-19
      Issue No: Vol. 11, No. 2 (2022)
       
  • A Novel Evaporative Cooling Technology for Mushroom Farming

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      Authors: Rohit Ghuge, Siddhi Akula, Ekta Sonavane, Aniket Gosavi, Paramjit Thakur
      Pages: 22 - 28
      Abstract: Mushroom cultivation in India growing gradually as an alternative source of income. The major problem faced by mushroom cultivator is maintaining specific environment (Relative humidity and temperature). Different verities of mushrooms required different environmental conditions. Hence, this project focuses on developing environmental conditions in small polyhouse to grow mushrooms throughout the year. The concept of evaporative cooling is utilized to maintain the approximate relative humidity 75% and temperature 25°C for oyster mushroom farming. Such conditions are developed by a novel design of evaporative cooler which is completely made up of clay material. As clay substance becomes more porous, the rate of evaporation rises. In this work, the porosity is enhanced by using pore forming agent (rice husk). The design consists of a cylindrical vessel, four nozzle and ventilation fan. The four nozzles are inserted in the cylindrical tank in the fashion of divergent to convergent. The water fills in the tank such a way that the outer layer of nozzle touches to the water. The air is flown from the lower section which comes out through the convergent part carrying higher relative humidity and lower temperature the air flow through nozzle will be humidified air. Three categories in mushroom (white, brown) are successfully grown with all the nutritional values intact in small polyhouse of 8*8*8 ft. This concept of micro environment can be carried forward for other categories of medicinal mushroom, plants ets. which required higher relative humidity & low temperature. By altering the design and tuning the parameters the relative humidity and temperature values can be maintained according to the type of crop to be grove by farmers.
      PubDate: 2022-11-19
      Issue No: Vol. 11, No. 2 (2022)
       
  • Increasing Total Solar Irradiance on Far Future Climate: General
           Atmospheric Circulation

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      Authors: Rafael Henrique Oliveira Rangel, Marcio Cataldi, Livia Sancho, Andre Luiz Belem, Luiz Landau
      Pages: 29 - 47
      Abstract: The total solar irradiation at the top of the atmosphere is the primary forcing mechanism for the Earth's Climate System. In this work, we used the addition of 10% in the radiation value (from 1360 W·m−2 to 1496 W·m−2) to simulate the Earth's climate system in the habitable zone inner orbit. Two ten-year-long fully coupled simulations using the Community Earth System Model were performed; the CONTROL experiment was configured with the standard total solar irradiation value and the TSI10p experiment with a 10% increase. TSI10p experiment revealed latitudinal shifts in atmospheric pressure belts, and the energy input increased the mean surface air temperature by 7°C. This temperature increase led to an increase in the surface heat flux. Additional changes in the atmosphere were identified, such as moister summers and drier winters in mid-latitudes and changes in planetary runoff and ocean salinity.
      PubDate: 2022-11-19
      Issue No: Vol. 11, No. 2 (2022)
       
  • Mapping of Dangerous Glacial Lakes by Using Systematic Extraction Approach
           in Different Catchments of Upper Indus Basin (UIB) Pakistan

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      Authors: Syed Hammad Ali
      Pages: 48 - 61
      Abstract: The glaciers are nature's most valuable fresh water resource for irrigation, industry, and hydroelectric growth, as well as for the present and future needs of millions of people who live downstream. Numerous of the waterways in the HKH region receive a significant percentage of ice melt water from this solid reservoir. Many of the glaciers which consist of massive amount of permanent snow and ice are found to generate several glacial lakes. However, these glaciers are losing mass due to hasten global warming. Rapid water buildup in these glacial lakes, especially in those near retreating glaciers, can cause their vulnerable embankment "dams" to suddenly fail. Glacial Lake Outburst Floods (GLOF) often result in massive flows of water and debris that have catastrophic downstream repercussions. Understanding of this resource seems an exceptional requirement for future planning for water resources and flood hazards. This paper provides comprehensive information about the glacial lakes in the different catchments of UIB and also provides information upon the distribution of glacial lakes and providing baseline data for further investigation of glacial lakes, GLOF hazards and risk assessment, and mitigation measures. This inventory of glacial lakes is prepared using reliable uniform and single source data with a semi-automatic method using RS/GIS. For the consistency of glacial lakes data, Satellite images obtained at same instant of time used to delineate glacial lakes boundary. The glacial lake boundaries were delineated using an automatic method on Landsat images from the year 2008 ± 2 years and also considering the data of 2015 + 2 years. The automatic method to delineate the glacial lake boundaries by defining the threshold condition of band ratio images made the process of mapping and monitoring of glacial lakes faster. It is challenging to apply the method as it is difficult to obtain good quality images with minimum amount of snow cover, cloud cover, and shadow portion so some of the lakes were manually digitized by validating on high resolution images in Google Earth as well as comparing with previous available inventory data. This inventory includes maximum numbers of lakes surrounding the glaciers. 
      PubDate: 2022-11-19
      Issue No: Vol. 11, No. 2 (2022)
       
 
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