927 research outputs found
Ab initio phase diagrams of binary alloys in the low solute concentration limit
No full textPhase diagrams are crucial to the design of new materials, to understand their phase stability and metastability under different thermodynamic conditions, such as composition, temperature, and pressure. Here, we use an ab initio approach to study the phase diagram of a binary alloy within the low concentration limit of a solute. Using the ab initio molecular dynamics calculations based on density functional theory, we estimate the solute partitioning ratios in solid–liquid phase equilibria. The chemical potential difference between the solvent and solute atoms in both solid and liquid phases is calculated using thermodynamic integration. As an illustration of the techniques, we have applied this method to reproduce the phase diagram of the Al–Mg alloy at zero pressure. We also compute the ab initio solid–liquid coexistence curve of pure Al by applying the phase-coexistence method with the free energy correction technique. The calculated results are in close agreement with the experiment, demonstrating the reliability of the models
C. C. Mehta
No full textOn the life and works of Chandravadan Chimanlal Mehta, b. 1901, Gujarati author
Marine Macroalgae: A Host for Epiphytic Microalgae at Bhavnagar District, Gujarat, India
No full textAlgae are class of autotrophic organism grows in both fresh and marine environment. Marine macro algae especially seaweed being exploited as a food, animal feed, chemical, biofuels, bio oils even in cosmetics for their bioactive components. In marine habitat some seaweed act as a civil engineer and microalgae build complex community on their host seaweed or macro algae. This association sometimes becomes fruitful by maintaining food chain and increase the rate of productivity of ecosystem and sometimes it affects the growth of host organism. Investigation on association of epiphytic microalgae with seaweed is rare in Bhavnagar district coast, Gujarat, India. Thus, this investigation carried out for forming a checklist of epiphytic microalgae at Coast of Gopnath, Bhavnagar district, Gujarat, India. During this study 7 species of epiphytic microalgae were recorded on 3 different host macro algae Gelidium crinale, Chaetomorpha crassa, Cladophora glomerata. This research was makes check list of epiphytic algae in Gopnath coast and focused on the need of extensive investigation about relationship between benthic flora and fauna with seaweed and their effect on seaweed growth, phytochemical productivity rate
Seaweed in Marine Ecosystem: A Review
No full textA total of 221 different species of seaweed from the 32 Chlorophyta, 64 Phaeophyta, and 125 Rhodophyta are employed for a wide range of applications worldwide. Roughly 145 species are consumed as food (L. W. Zemke-White and M. Ohno). India is home to 216 different species of green seaweed, 194 different species of brown seaweed, and 434 different species of red seaweed. A supply of seaweed In addition to its 2 million km2 Exclusive Economic Zone (EEZ) and nine marine states, the tropical South Asian nation of India is located at latitudes 08.04-37.06 N and 68.07-97.25 E. It has a coastline that is around 7500 km long. The seaweed zone served as a permanent and temporary home for fish and other aquatic creatures. Most recently according to Karthik et al., 2013 Indian seaweed diversity includes 1153 species from 271 genera. Gujarat coast consist total 198 seaweed species diversity ((Jha et al., 2009)
Mobilities in Religious Knowledge: Phiroz Mehta and the Logics of Transreligiosity in 1970s–80s South London
No full textThis paper examines transreligiosity in the context of the transmission of South Asian concepts of spirituality to the UK in the 20th century. Between the 1920s and 1990s, Indian teacher and author Phiroz Mehta (1902–1994) crossed borders in a colonial and postcolonial shuttling between India and the UK but also transgressed conceptual and practice borders of religion, teaching Indian religious concepts to post-Christian spiritual seekers in 1970s–80s South London. Mehta cultivated an elasticity between many religious and philosophical traditions, recognising the post-institutional fatigue of subjects who sought alternative forms of ‘belonging without believing’. Privileging the domestic space for teaching, as well as transitory ‘camp’ gatherings in the UK and Germany, Mehta often operated in the social margins, combining teachings from Hinduism, Buddhism, and Christianity with Zoroastrianism, Judaism (specifically Kabbalah), and Daoism. He offered his tutees the freedom to practice religion in whatever way they chose by drawing on a broad range of traditions concurrently to create a transreligiosity. This paper examines Panagiotopoulos and Roussou’s ‘transgressional webs of practising individualised forms of alternative spirituality’ in relation to Mehta’s followers in the 1970s-1980s and asks how transreligiosity relates to other theoretical analyses, such as religious exoticism, bricolage, religious appropriation, cultural re-articulation or assemblage. This paper focuses on qualitative interviews with original members of the Mehta community conducted between 2021 and 2022.</p
Estimated public health impact of human rotavirus vaccine (HRV) and pneumococcal polysaccharide protein D-conjugate vaccine (PHiD-CV) on child morbidity and mortality in Gavi-supported countries
No full textVaccine impact models against rotavirus disease (RD) and pneumococcal disease (PD) in low- and middle-income countries assume vaccine coverage based on other vaccines. We propose to assess the impact on severe disease cases and deaths avoided based on vaccine doses delivered by one manufacturer to Gavi-supported countries. From the number of human rotavirus vaccine (HRV) and pneumococcal polysaccharide protein D-conjugate vaccine (PHiD-CV) doses delivered, we estimated the averted burden of disease 1) in a specific year and 2) for all children vaccinated during the study period followed-up until 5 years (y) of age. Uncertainty of the estimated impact was assessed in a probabilistic sensitivity analysis using Monte-Carlo simulations to provide 95% confidence intervals. From 2009 to 2019, approximately 143 million children received HRV in 57 Gavi-supported countries, avoiding an estimated 18.7 million severe RD cases and 153,000, deaths. From 2011 to 2019, approximately 146 million children received PHiD-CV in 36 countries, avoiding an estimated 5.0 million severe PD cases and 587,000 deaths. The number of severe cases and deaths averted for all children vaccinated during the study period until 5 years of age were about 23.2 million and 190,000, respectively, for HRV, and 6.6 million and 749,000, respectively, for PHiD-CV. Models based on doses delivered help to assess the impact of vaccination, plan vaccination programs and understand public health benefits. In 2019, HRV and PHiD-CV doses delivered over a 5-y period may have, on average, averted nine severe disease cases every minute and one child death every 4 min
Chromosome territory position and active relocation in normal and hutchinson-gilford progeria fibroblasts
No full textThis thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Radial chromosome positioning in interphase nuclei is non-random and can alter according to developmental, differentiation, proliferation or disease status. The aim of this thesis is to understand how chromosome re-positioning is elicited and to identify the nuclear structures that assist this re-localisation event.
By positioning all human chromosomes in primary fibroblasts that have left the proliferative cell cycle, the study within this thesis has demonstrated that in cells made quiescent by reversible growth arrest, chromosome positioning is altered considerably. Upon removal of serum from the culture medium, chromosome re-positioning took less than 15 minutes, required energy and was inhibited by drugs affecting the polymerization of myosin and actin. The nuclear distribution of nuclear myosin 1β was dramatically different in quiescent cells as compared to proliferating cells. If the expression of nuclear myosin 1β was suppressed using interference RNA procedures the movement of chromosomes after 15 minutes in low serum was inhibited. When high serum was restored to the serum starved cultures chromosome repositioning was only evident after 24-36 hours that coincided with a return to a proliferating distribution of nuclear myosin 1β
Design and development of a mechatronic training simulator for adult ECMO
No full textWidespread adoption of Extracorporeal Membrane Oxygenation (ECMO) in adults has been limited by unfamiliarity with the procedure, including cannulation and safe handling of the ECMO equipment. We present the design and development of a mechatronic training simulator for ECMO that can help medical professionals acquire the needed skills, gain familiarity, and reduce errors by practicing before performing the procedure on real patients. The trainer is designed as an ultrasound-compatible, wholesome simulator with realistic components such as synthetic blood vessels, cannulation pads, and a color-changing blood simulant to simulate oxygenation and deoxygenation. The simulator is integrated with a mathematical model of human physiology to simulate real-time patient vitals and training scenarios, and to control the trainer hardware. We present results related to successful cannulation under ultrasound scanning and a simple patient scenario of hypovolemia.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2021-05-01The student, Iti Mehta, accepted the attached license on 2019-04-24 at 10:58.The student, Iti Mehta, submitted this Thesis for approval on 2019-04-24 at 11:11.This Thesis was approved for publication on 2019-04-24 at 12:45.DSpace SAF Submission Ingestion Package generated from Vireo submission #13873 on 2019-08-22 at 15:08:02Made available in DSpace on 2019-08-23T20:36:09Z (GMT). No. of bitstreams: 2
MEHTA-THESIS-2019.pdf: 84393765 bytes, checksum: 74f0edf247057995595372eb8076e513 (MD5)
LICENSE.txt: 4206 bytes, checksum: 30fb64a86cfc352d6579ccb023b2a936 (MD5)
Previous issue date: 2019-04-24Embargo set by: Seth Robbins for item 112203
Lift date: 2021-08-23T20:36:18Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 112203 on 2021-08-24T09:15:24Z
Optimal Bioeconomic Management Strategies for Prevention and Control of Invasive Alien Species
No full textPaper removed by author. Please see the current version, available online January 8, 2007: Mehta, S.V. et al. Optimal detection and control strategies for invasive species management. Ecological Economics (2007), doi:10.1016/j.ecolecon.2006.10.024Environmental Economics and Policy,
Design and implementation of a phase locked loop for high-speed serial links
No full textThe student, Rushabh Mehta, accepted the attached license on 2016-04-25 at 13:40.The student, Rushabh Mehta, submitted this Thesis for approval on 2016-04-25 at 13:46.This Thesis was approved for publication on 2016-04-27 at 14:52.DSpace SAF Submission Ingestion Package generated from Vireo submission #9475 on 2016-07-07 at 13:50:45Made available in DSpace on 2016-07-07T20:27:59Z (GMT). No. of bitstreams: 2
MEHTA-THESIS-2016.pdf: 13984347 bytes, checksum: 4ecb06c5c270bc1beffb061eeae85eef (MD5)
LICENSE.txt: 4210 bytes, checksum: e6aea67d4e02d64f06671bb40ada2274 (MD5)
Previous issue date: 2016-04-27Recent advances in the semiconductor industry and process technology scaling have increased the demand for fast, robust computing. The thirst for high-processing, low power ICs is ever increasing. This has pushed the demand for high data rates in wireless and wireline communication systems in the multi-Gbps range. With higher data rates, the I/O links need to scale proportionally. However, the I/O channel bandwidth has not scaled appropriately making it the biggest bottleneck in high-speed links. Parallel links have not been able to match this increasing system performance due to issues such as crosstalk, timing skew and packaging costs. Thus there is a need for high-speed serial links. For high-speed transmission of data, there arises a need for high-speed on chip clocking circuits making the use of Phase-Locked Loops (PLLs) imperative.
This thesis includes an overview of high-speed links along with the need for PLLs. An in-depth understanding of PLL theory, loop dynamics and behavioral and transistor level simulation follows. Performance metrics such as phase noise, random jitter and deterministic jitter are discussed. Finally, this thesis concludes with an insight into All Digital Phase-Locked Loops (ADPLLs).Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2018-05-01Embargo set by: Seth Robbins for item 93174
Lift date: 2018-07-07T20:28:14Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 93174
Lift date: 2018-07-07T20:35:34Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 93174 on 2018-07-08T09:15:20Z
- …
