176 research outputs found
2022 IEEE Long Island Systems, Applications and Technology Conference (LISAT 2022)
No full textUma Balaji (with Patrick Evans, Ryan Avery, Maxwell Malcy, and Maverick Ruiz) is a contributing author, Multipurpose Solar Charging Station.https://digitalcommons.fairfield.edu/engineering-books/1079/thumbnail.jp
Proceedings of the International Conference on Computers Communication and Devices, (ICCCD, 2000)
No full textUma Balaji is a contributing author, Computer aided design of e-plane diplexer.
Book description:
Papers presented at the International Conference on Computers Communication and Devices, (ICCCD, 2000), Indian Institute of Technology, Kharagpur, Dec 2000.https://digitalcommons.fairfield.edu/engineering-books/1035/thumbnail.jp
Submerged mandibular carious deciduous second molar along with an impacted second premolar associated with an atypical inflammatory follicular cyst: A rare case report
No full textThe author presents a case of submerged carious deciduous molar along with an inflammatory atypical follicular cyst associated with an impacted mandibular second premolar in the right mandible identified through clinical and routine radiological examination including cone beam computed tomography and histopathology. The involvement of submerged deciduous molar with dental caries by itself a rare occurrence and an impacted permanent premolar tooth associated with an infected follicular cyst is still more a rare event
Innovative Techniques in Instruction Technology, E-learning, E-assessment, and Education
Full text linkUma Balaji is a contributing author, Demonstrations of Transmission Line Effects.
Book description:
Innovative Techniques in Instruction Technology, E-Learning, E-Assessment and Education is a collection of world-class paper articles addressing the following topics:
E-Learning including development of courses and systems for technical and liberal studies programs; online laboratories; intelligent testing using fuzzy logic; evaluation of on line courses in comparison to traditional courses; mediation in virtual environments; and methods for speaker verification.
Instruction Technology including internet textbooks; pedagogy-oriented markup languages; graphic design possibilities; open source classroom management software; automatic email response systems; tablet-pcs; personalization using web mining technology; intelligent digital chalkboards; virtual room concepts for cooperative scientific work; and network technologies, management, and architecture.
Science and Engineering Research Assessment Methods including assessment of K-12 and university level programs; adaptive assessments; auto assessments; assessment of virtual environments and e-learning.
Engineering and Technical Education including cap stone and case study course design; virtual laboratories; bioinformatics; robotics; metallurgy; building information modeling; statistical mechanics; thermodynamics; information technology; occupational stress and stress prevention; web enhanced courses; and promoting engineering careers.
Pedagogy including benchmarking; group-learning; active learning; teaching of multiple subjects together; ontology; and knowledge representation.
Issues in K-12 Education including 3D virtual learning environment for children; e-learning tools for children; game playing and systems thinking; and tools to learn how to write foreign languages.https://digitalcommons.fairfield.edu/engineering-books/1034/thumbnail.jp
Predicting the diffusivity of CO2 in substituted amines
No full textThe experimental determination of the diffusivity of carbon dioxide (CO2) in an amine solvent is difficult as the CO2 diffuses and reacts simultaneously when absorbed into an amine solvent. As the knowledge of the diffusivity and solubility of CO2 is essential to design the absorption units based on amine solvents, the nitrous oxide (N2O) analogy is used in practice to estimate them. It consists of evaluating those physical properties by substituting the reacting CO2 with an inert gas of a similar structure, N2O. The diffusion of CO2 in amine solvents is investigated using molecular dynamics (MD) simulation. Unlike experiments, MD simulation allows a direct measurement of the CO2 diffusivity. In MD simulations, the reaction between CO2 and the amine can be switched off. The Fick diffusion coeffcients are derived from the Maxwell-Stefan diffusivities and the thermodynamic factors. Different amine solvents like monoethanolamine, diethanolamine, methyl-diethanolamine and ethylamine are investigated. The N2O analogy in the monoethanolamine-water solution has been validated.EThChemical EngineeringApplied Science
Changes in nuclear protein acetylation in u.v.-damaged human cells
No full textWe have investigated the levels of nuclear protein acetylation in u.v.-irradiated human fibroblasts. Initially, we measured the levels of acetylation in total acid-soluble nuclear proteins and observed two distinct differences between the irradiated and unirradiated (control) cells. Immediately after irradiation, there is a 'wave' of protein hyperacetylation (i.e. a total acetylation level greater than that of unirradiated cells) that lasts for 2-6 h depending on the experimental conditions. This hyperacetylation phase is then followed by a hypoacetylation phase, lasting for many hours, and the total level of acetylation does not return to that of control cells until 24-72 h after u.v. damage. Both the magnitude and duration of each phase is dependent on the dose of u.v. light used. The wave of hyperacetylation is more pronounced at low u.v. doses (i.e. less than 5 J/m2), while the wave of hypoacetylation is more pronounced at higher u.v. doses (greater than or equal to 8 J/m2). Furthermore, the duration of each phase is prolonged when cells are exposed to 2 mM hydroxyurea, an agent which retards the rate of excision repair at u.v.-damaged sites. Examination of the acetylation levels of the individual nuclear proteins indicated that acetylation of the core histones follows the same pattern observed for the total acid-soluble protein fractions. Furthermore, these were the only major proteins in the total acid-soluble fraction observed to undergo the early, rapid hyperacetylation immediately following u.v. damage. Acetylation of histone H1 was negligible in both damaged and control cells, while three prominent non-histone proteins were acetylated only after long labeling times (greater than 4 h) in each case, gradually becoming hyperacetylated in the u.v.-damaged cells. These results raise the possibility that a causal relationship exists between nuclear protein acetylation and nucleotide excision repair of DNA in human cells.LR: 20061115; PUBM: Print; GR: 1 1H-2940-8751/PHS; GR: ES02614/ES/NIEHS; JID: 8008055; 0 (Acetic Acids); 0 (Chromosomal Proteins, Non-Histone); 0 (Nucleoproteins); 56-87-1 (Lysine); 64-19-7 (Acetic Acid); ppublishSource type: Electronic(1
Enhanced DNA repair synthesis in hyperacetylated nucleosomes
No full textWe have investigated the level of 'early' DNA repair synthesis in nucleosome subpopulations, varying in histone acetylation, from normal human fibroblasts treated with sodium butyrate. We find that repair synthesis occurring during the first 30 min after UV irradiation is significantly enhanced in hyperacetylated mononucleosomes. Nucleosomes with an average of 2.3 acetyl residues/H4 molecule contained approximately 1.8-fold more repair synthesis than nucleosomes with an average of 1.5 or 1.0 acetyl residues/H4 molecule. Fractionation of highly acetylated nucleosomes by two-dimensional gel electrophoresis yielded an additional 2.0-fold enrichment of repair synthesis in nucleosomes containing 2.7 acetyl residues/H4 molecule as compared to nucleosomes containing 1.9 acetyl residues/H4 molecule. This enhanced repair synthesis is associated primarily with nucleosome core regions and does not appear to result from increased UV damage in hyperacetylated chromatin. In addition, the distribution of repair synthesis within nucleosome core DNA from hyperacetylated chromatin is nonrandom, showing a bias toward the 5' end which is similar to that obtained for bulk (unfractionated) chromatin. These results provide strong evidence that enhanced repair occurs within nucleosome cores of hyperacetylated chromatin in butyrate-treated human cells. Finally, pulse-chase experiments demonstrate that the association of enhanced repair synthesis with hyperacetylated nucleosomes is transient, lasting only about 12 h after UV damage.LR: 20061115; PUBM: Print; GR: CA43079/CA/NCI; GR: ES00110/ES/NIEHS; GR: ES02614/ES/NIEHS; GR: etc.; JID: 2985121R; 0 (Chromatin); 0 (Histones); 0 (Nucleosomes); 0 (Pyrimidine Dimers); 9007-49-2 (DNA); ppublishSource type: Electronic(1
Small-disturbance angle stability enhancement through direct load control - Part I - framework development
No full textThis paper is the first of a two-part paper on the application of selective direct control of loads for small-disturbance angle stability enhancement in power systems. The change in the utility business model and developments in enabling technologies open up new possibilities for power system reliability enhancement. This paper proposes preventive modulation of selected loads through direct control for small-disturbance angle stability enhancement. An analysis framework based on the structured singular value theory has been proposed in which the controllable load range at selected buses that satisfies the desired stability robustness performance criterion is determined. Two conceptually different approaches for analysis of load modulation have been presented. Results have been presented on an equivalent of the Western Electric Coordinating Council system in the second part of this paper.PT: J; CR: 6216063, US *CIGRE, 1999, TF380216 CIGRE *IEEE, 1992, 42151992 IEEE ANDERSON PM, 1994, POWER SYSTEM CONTROL BALAS GJ, 1993, ANAL SYNTHESIS TOOLB DJUKANOVIC M, 1998, IEEE T POWER SYST, V13, P1311 DJUKANOVIC M, 1999, IEEE T POWER SYST, V14, P635 DOYLE JC, 1982, P I EL ENG D, V129, P242 ETO J, 2002, P IEEE WINT POW M NE, P1002 HIRST E, 2002, NEW ENGLAND DEMAND R ILIC M, 2002, P IEEE WINT POW M NE KUECK J, 2003, CALIFORNIA ENERGY CO RAMANATHAN B, 2003, P N AM POW S ROLL OC SKOGESTAD S, 1998, MULTIVARIABLE FEEDBA YOUNG PM, 1993, THESIS CAL TECH PASA YU XC, 2001, IEEE T POWER SYST, V16, P456; NR: 16; TC: 0; J9: IEEE TRANS POWER SYST; PG: 9; GA: 039NOSource type: Electronic(1
Analysis of epididymal proteins during sexual maturation in male albino mice
No full textAndrogen dependent epididymal proteins act as antigen to produce autoantibodies and affect normal fertility. In the present study, epididymal proteins were analyzed during the time of sexual maturation and their androgen dependency was studied in male albino mice. Epididymis of 21 days (Pre-pubertal), 45 days (Pubertal), 60 days (Post-pubertal), orchidectomized (15 days after surgery) and orchidectomized with testosterone-treated (15 days after treatment) mice were dissected out and analyzed. Caput, corpus and cauda epididymidis were separated and the protein extract was prepared with 0.1 M PBS for 10% SDS-PAGE analysis. Testosterone assay was performed in the experimental groups except the testosterone treated group. The electrophoretic analysis of proteins in caput, corpus and cauda epididymidis of orchidectomized animals showed the disappearance of several proteins as compared to the adult. However, the disappeared proteins started to reappear in testosterone treated animals. The results suggest that removal of testis depletes the testosterone level and causes significant alteration in epididymal proteins. These proteins need further investigation for the purpose of immunocontraception by using them as antigens.LR: 20061115; PUBM: Print; JID: 8309201; 0 (Epididymal Secretory Proteins); 58-22-0 (Testosterone); ppublishSource type: Electronic(1
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