233 research outputs found
Analysis of power balance in a helicon plasma source
No full textThis thesis analyses the Helicon Injected Inertial Plasma Electrostatic Rocket (HIIPER), a space propulsion concept consisting of a helicon source for plasma generation and an ion extraction method using a nested pair of inertial electrostatic confinement (IEC) grids that are asymmetrically designed. In this study, the HIIPER setup was modelled based on the previous experimental data of the plasma characteristics obtained to account for various power loses and understand the major contributors to the low efficiency and final thrust performance. The loses to the quartz tube wall was substantially higher than the loses at the metal bellow region and the loses due to ionization and excitation. Future improvements in Langmuir probe design to characterize the plasma and the feasible changes to the experimental setup are provided in this study.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2022-05-01The student, Hariharan Manickam Vaithiyanathan, accepted the attached license on 2020-04-30 at 11:52.The student, Hariharan Manickam Vaithiyanathan, submitted this Thesis for approval on 2020-04-30 at 12:09.This Thesis was approved for publication on 2020-05-12 at 11:33.DSpace SAF Submission Ingestion Package generated from Vireo submission #15126 on 2020-08-25 at 17:28:30Made available in DSpace on 2020-08-26T23:57:20Z (GMT). No. of bitstreams: 2
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Previous issue date: 2020-05-12Embargo set by: Seth Robbins for item 115750
Lift date: 2022-08-26T23:57:28Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 115750
Lift date: 2022-08-26T23:58:55Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemAuthor requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Onl
Cavitation Technology—Potential Way of Generating Nanomaterials and Nanoemulsions for Wider Technological Applications
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Acceptance of technology by parent fraternity as a means of remote learning for children: An empirical study
No full textThe main purpose of this empirical study is to understand how acceptance of technology is prevailing among the parent fraternity that helps them to develop a positive attitude towards using technology as a tool to enhance their ward’s learning process. A survey among 6361 parents (Indian origin) of primary school students (Kindergarten and primary level) regarding their perceived usefulness and perceived ease of use regarding technology-assisted learning for their wards to understand how these factors influence their attitude towards technology for learning in the future was carried out through an online questionnaire. The result showed that the more parents found the Usage of Technology towards the e-learning process of their wards, the higher they tend to adopt the technology by exhibiting a positive Attitude towards Technology while the perception of Ease of Use of Technology also significantly predicted the perception of Attitude towards Technology. The favourable Attitude towards Technology is more visible among the parents of students who are of lower levels of study as compared to those who are at a slightly higher level of study. It is found that the parents of the student from the rural area schools possessed positive Attitudes towards Technology as compared to their counterparts in the urban areas. The outcome of this study is of greater relevance to the schools especially in the lower level classes to help students to harness technology from a young age because the parent fraternity is already in favour of such initiative
Cavitation Technology—The Future of Greener Extraction Method: A Review on the Extraction of Natural Products and Process Intensification Mechanism and Perspectives
No full textWith growing consumer demand for natural products, greener extraction techniques are found to be potential alternatives especially for pharmaceutical, nutraceutical, and cosmetic manufacturing industries. Cavitation-based technology has drawn immense attention as a greener extraction method, following its rapid and effective extraction of numerous natural products compared to conventional techniques. The advantages of cavitation-based extraction (CE) are to eliminate the application of toxic solvents, reduction of extraction time and to achieve better extraction yield, as well as purity. The cavitational phenomena enhance the extraction efficiency via increased mass transfer rate between the substrate and solvent, following the cell wall rupture, due to the intense implosion of bubbles. This review includes a detailed overview of the ultrasound-assisted extraction (UAE), negative pressure cavitation (NPC) extraction, hydrodynamic cavitation extraction (HCE) and combined extractions techniques which have been implemented for the extraction of high-value-added compounds. A list of essential parameters necessary for the maximum possible extraction yield has been discussed. The optimization of parameters, such as ultrasonic power density, frequency, inlet pressure of HC, extraction temperature and the reactor configuration denote their significance for better efficiency. Furthermore, the advantages and drawbacks associated with extraction and future research directions have also been pointed out
ChemInform Abstract: Novel Regio‐ and Stereoselective Synthesis of Functionalized 3‐Spiropyrrolidines and 3‐Spiropyrrolizidines Using the Baylis—Hillman Adducts Derived from Nitroolefins.
No full textChemInform Abstract: First Friedel-Crafts Reaction of the Baylis-Hillman Adducts Derived from Nitroolefins: Application Towards Synthesis of Pyrrolidines and Spiropyrrolidines.
No full textAdditions and corrections: Nano a-NiMoO4 as new electrode for electrochemical supercapacitors
No full textTwo of the author names are incorrectly written, showing the surname as the first name, and the first name as the surname. The correct names are Danielle Meyrick and Manickam Minaksh
Ultrasonic Process Intensification for the Efficient Extraction of Nutritionally Active Ingredients of Polysaccharides from Bioresources
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