{"title":"Modification of Design of Cryo-Oxygen Plant for Improved Performance","authors":"R. Rao T., Ranjan Ojha P","doi":"10.15226/sojmse.2018.00152","DOIUrl":"https://doi.org/10.15226/sojmse.2018.00152","url":null,"abstract":"Development of an industry is very important for the nation and so is its economical functioning. Cryogenics, being versatile in its application needs proper nourishment and care, which is done by periodic improvements in its systems. Specifically liquid Oxygen is a very important item for high level research and applications. The possibility of launching space vehicle has also come due to the development of liquid oxygen. This also finds its use as a lifesaving item for doctors and many more. The necessity for the economic development of these plants will benefit mankind in many fields. There are many researches which has been done starting from reducing the cost of Oxygen Liquefaction and ultimately its production for cryogenics. The only expenditure for production of liquid Oxygen is electricity. Out of the total electricity consumed, compressor consumes 90% and the remaining 10% is used in running other machinery and lighting of the plants. Studies have also led to the fact that the temperature also plays a great role in consumption of electricity. So in this paper, an attempt has been done to reduce this temperature also. We have incorporated a solar refrigeration system and Freon cooler. Booster compressor is also introduced and modification in it has led to the work saving up to 4.30%. Keywords: Cryogenics; Liquefaction; Solar Refrigeration System; Freon cooler; Booster Compressor;","PeriodicalId":342686,"journal":{"name":"SOJ Materials Science & Engineering","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115410053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Maryam Majzoubi, Yuxuan Zhang, E. Hennig, T. Scholehwar, K. Uchino
{"title":"Piezoelectric Characterization with Mechanical Excitation in PZT Bar with Non-Electrode Boundary Condition–K31 Mode Case","authors":"Maryam Majzoubi, Yuxuan Zhang, E. Hennig, T. Scholehwar, K. Uchino","doi":"10.15226/sojmse.2018.00151","DOIUrl":"https://doi.org/10.15226/sojmse.2018.00151","url":null,"abstract":"We introduced an advanced piezoelectric characterization method with mechanical excitation on partial electrode samples, which can determine additional physical parameters the conventional full-electrode electrical excitation method cannot provide. A non-electrode sample with only 10% electrode at the center of a rectangular k31 piezoelectric plate has the benefits for measuring the extensive parameters directly and much precisely. In this paper, we derived first the exact analytical solutions on the partial electrode configuration, including the 10% mechanical excitation part in a partial non-electrode sample for calculating there sonance vibration mode and mechanical quality factors of the composite bar sample for obtaining the extensive elastic compliance and loss factor. The result suggests that the almost accurate values can be obtained even for a specimen with up to 40% center electrode area in the k31 mode samples. Second objective is to compare three different simulations (ATILA FEM, 6-terminal Equivalent Circuit and Analytical Solution). This mechanical excitation method has the benefit in measuring physical parameters which cannot be obtained directly from the IEEE Standard electrical excitation method. Keywords: Direct loss measurement; intensive and extensive parameters; resonance vibration mode; PZT; mechanical quality factor;","PeriodicalId":342686,"journal":{"name":"SOJ Materials Science & Engineering","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132027431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Vieira, N. Maurmann, J. Venturini, P. Pranke, Carlos Pérez Bergmann
{"title":"Production and Characterization of Magnetic Fe3O4Nanoparticles Coated with PCL for Biomedical Applications","authors":"J. Vieira, N. Maurmann, J. Venturini, P. Pranke, Carlos Pérez Bergmann","doi":"10.15226/sojmse.2019.00158","DOIUrl":"https://doi.org/10.15226/sojmse.2019.00158","url":null,"abstract":"Currently, magnetic nanoparticles are widely studied with regard to their application in cancer treatment. This study aims to show a straightforward strategy for the production of Fe3O4 nanoparticles (NPs) with biocompatible surface modifications with polycaprolactone (PCL) for biomedical purposes. The effects of the polymer coating on the properties of magnetite were evaluated. Crystallinity, morphology, composition, hydrodynamic size and magnetic properties of the produced nanoparticles were analysed via X-ray diffractometry (XRD), Transmission Electron Microscopy (TEM), Fourier-Transform Infrared Spectroscopy (FTIR), Dynamic Light Scattering (DLS) and Vibrating Sample Magnetometry (VSM), respectively. The proposed method produced nanoparticles of magnetite with an average size between 9 and 11 nm, with spherical morphology and superparamagnetic properties. Magnetization values were not compromised even when the highest amount of polymer was used in the surface modification. On the other hand, the coating resulted in the decrease of the hydrodynamic size of the composites, indicating greater colloidal stability when the polymer was present. The obtained nanoparticles showed maintenance of significant superparamagneticbehavior, even in the presence of PCL on their surface. This phenomenon would allow for their application as a further optimized vector in hyperthermia cancer treatment, controlled drug delivery and resonance imaging. Keywords: Nanoparticles; Magnetite;PCL; Cancer; Hyperthermia","PeriodicalId":342686,"journal":{"name":"SOJ Materials Science & Engineering","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122104827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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