556 research outputs found
Chemical characterization of camelina seed oil:
No full textCamelina sativa (L).Crantz also known as false flax, Dutch flax is an ancient oil seed crop that belongs to the Brassicaceae family. Camelina oil pressed from the seeds of this crop has a unique aroma.
Eighteen camelina oil samples were analyzed for fatty acid composition (13 unrefined, 2 deodorized and 3 refined samples). Eight of these samples were analyzed for unsaponifiables content, free fatty acids and volatiles and semi-volatile compounds. Seven camelina seed samples were analyzed for volatile and semi-volatile compounds as well to determine the suitability of these products in animal feed formulations.
Fatty acid composition was obtained by the trans-esterification of the triacylglycerols in the oil to their methyl esters and 21 different fatty acids with chain length from C-14 to C-24 were identified. The major fatty acids were α-linolenic, linoleic, oleic, eicosenoic and palmitic acid and three fatty acids, namely tricosanoic, pentadecanoic and heptadecanoic are being first reported here.
The unsaponifiables fraction in camelina oil samples ranged between 0.45-0.8% and 21 compounds were identified. The major compounds identified were β-sitosterol, campesterol, cholesterol, phytol, squalene and brassicasterol which accounted for 80-90% of the unsaponifiable content in camelina oil.
A total of 168 and 306 volatile and semi-volatile compounds were identified in the headspace of camelina seeds and oil respectively. Homologous series of lipid oxidation derived compounds like aldehydes, ketones, alcohols, furans and hydrocarbons dominate the aroma and favor profile of the oil and seeds. Sulfur compounds (methyl mercaptan, dimethyl sulfide, dimethyl disulfide and dimethyl trisulfide), naturally occurring 3-alkyl-2-methoxy pyrazines, terpenes, short chain free fatty acids and maillard reaction products were also identified in camelina seeds. The presence of 2-sec-butyl-3-methoxy pyrazine, aldehydes and alcohols (with green notes) and sulfur compounds like 2, 4, 5-trithiahexane and 1-butene-4-isothiocyanato in some camelina oils, may be responsible for the unique aroma of this oil.
The information from this study may potentially be used by camelina oil producers as supporting data for the chemical characteristics of the oil produced in Montana, USA. Camelina oil can serve as a good vegetable source of α-linolenic acid provided it gets the much awaited GRAS certification.M.S.Includes bibliographical references (p. 165-170)by Anusha Sampat
From childhood to nationhood: memory, media and malevolence
No full textThis talk explicates the entangled relationship between childhood and nationhood in the Indian context through the analysis of two key events in modern Indian history. The current right-wing nationalist discourse in India espouses an ethnonationalist identity that relies on a unitary logic of race, religion, land, and language. This logic is founded upon Savarkar’s slogan of “Hindi, Hindu, Hindustan” that valorizes not only the Hindu religion but also the Aryan race, the Hindi language, and the land beyond the river Indus. Children and young people are perceived to be the crucible of this Hindu nation that (supposedly) rightfully belongs to the Hindu Brahmanical Hindi-speaking Aryan male. This presentation aims to show how history, narrativity and performance have been deployed to center the figure of the child as well as real children (and youth) as critical players of the Neo-Hindutva discourse. Through a combination of field evidence, secondary literature and media sources, this poster shows how stories and memories are instrumental in the production and propagation of nationalist discourses to children and young people. The talk expounds different tactics such as distorting history, maneuvering memory and rewriting myths that are deployed within the private spaces of homes, the public spaces of schools and neighborhoods and mediatized spaces of movies, through which children imbibe as well as disseminate the idea of India as a Hindu nation.This work was accepted to the annual Graduate Research and Creative Works Symposium while the author was a graduate student at Rutgers University-Camden
Drying of supported catalysts: a reduced parameter model for high concentration nickel-alumina systems
No full textSupported catalysts are widely used in many industries. Manufacturing these catalysts is extremely complex and these processes are influenced by many interdependent parameters. Although their performance and activity are the most critical properties, their structures and design are also critical to their effectiveness. Research work showed how the adsorption of metal on the catalyst support and film breakage could significantly influence metal distributions at lower concentrations. A nickel nitrate hexahydrate-alumina system was studied. It was observed that at higher concentrations, the adsorption parameters were no longer the controlling factor, and solution properties began to take over the metal distribution characteristics. Solution properties like density, viscosity, surface tension and volume ratio of metal begin to take over the metal distribution at these high concentrations. At very high concentrations (about 3.0 M), a uniform metal distribution profile was observed due to the high concentration and low melting point of the metal salt, leading to a molten liquid phase during drying. This model which was based on nickel nitrate hexahydrate, exhibited a good agreement with experimental results. To apply this model to other metal-support systems, a lot of experiments would have to be repeated to determine the metal solution properties as they are unique to different metal-support combinations. In this thesis, we designed and created a simplified model based on the high-concentration nickel nitrate hexahydrate model. This model can be applied to other metals on an Alumina support and can simulate their metal distributions after the drying process. Designing this model involved a detailed analysis of each of the solution based parameters and adsorption parameters considered for nickel nitrate. A reduced parameter model involving fewer parameters was developed and tested using a new metal precursor - cobalt nitrate hexahydrate. Experiments were then performed for cobalt nitrate hexahydrate on alumina supports and their parameters were incorporated into the model. Post drying metal distributions for different concentrations of the metal solutions were generated using this model.M.S.Includes bibliographical referencesby Anusha Vallal Noorithay
The neural correlates of the unified percept of alcohol-related craving: a fMRI and EEG study
No full textAbstractAlcohol addiction is accompanied by aberrant neural activity. Previously, task-based fMRI and resting-state EEG studies have revealed that craving, a critical component of addiction, is linked to abnormal activity in cortical regions including the dorsal anterior cingulate cortex (dACC), nucleus accumbens (NAcc), posterior cingulate cortex (PCC) and pregenual anterior cingulate cortex (pgACC), etc. In this study, we combine these two imaging techniques to investigate a group of alcohol-addicted patients and provide convergent evidence for the neural correlates of craving not only in alcohol but substance abuse in general. We observe abnormal BOLD signal levels in the dACC, NAcc, pgACC, PCC, amygdala, and parahippocampus (PHC) in a cue-reactivity fMRI experiment. These findings are consistent with increased beta-band activity in the dACC and pgACC in resting-state EEG. We further observe desynchronization characterized by decreased functional connectivity in cue-based fMRI and hypersynchronization characterized by increased functional connectivity between these regions in the theta frequency band. The results of our study show a consistent pattern of alcohol craving elicited by external cues and internal desires. Given the advantage of superior spatial and temporal resolution, we hypothesize a “central craving network” that integrates the different aspects of alcohol addiction into a unified percept.</jats:p
The impact of ride-hailing services on travel behaviour
Full text linkThe introduction of Ride- hailing Services into our transport systems has rapidly transformed travel behavior. Ride-hailing services provide multi-modality and fill transit gaps, but they also impact the modal share of other modes such as public transit and car ownership. This study delves into links between ride-hailing services and private vehicles ownership. It also questions the impact of ridesharing services on public transport use and the role neighborhood context plays on the link between ride-hailing and car-ownership. This is studied through a Path Analysis implemented through Structural Equation Modelling (SEM). It describes the relationships the relationship between ‘ride-hailing usage’, ‘public transit usage’, ‘car ownership’, ‘sociodemographic characteristics’, ‘urban form’ and ‘technology dependence’. It factors in Ewing’s sprawl index to represent urban form and takes into consideration the number of years since rideshare was introduced in specific cities as part of calculations.
The primary database for the research is the NHTS 2017 survey. Data compilation is done to establish a dataset of cities with TNCs operating in them and the duration of operation.
The first of the three key questions analyzed in this study is the relationship between public transit and ridesharing. Although the statistical model shows an insignificant covariance, initial findings suggest that ride sharing services complement public transit more in small towns and less in urban areas. The second topic analyzed through this model was the link between ridesharing and car ownership. The model estimates that ride-hailing has a significant and comparatively large impact on car ownership. Due to the bidirectional nature of the model, we were able to study the reverse relationship as well. The model did not show car-ownership having a significant impact on frequency of rideshare use.
The final relationship to be studied was the impact of neighborhood context on the links between car ownership and ride-hailing. It was suggested through a moderation estimation that urban form does play a significant role in impacting the role of rideshare on car ownership. The length of duration since the introduction of TNCs in a city plays an important role on car ownership. The longer TNCs have been around, the smaller the value of car ownership is. Denser Urban forms deepen this relationship while sprawled neighborhoods weaken the correlation.
Based on this research a few areas have been identified as areas with critical data deficiency which are needed to understand and properly manage the ever-changing travel behavior. These areas include the links between city types, public transit and rideshare.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2021-08-01The student, Anusha Mishra, accepted the attached license on 2019-07-17 at 17:24.The student, Anusha Mishra, submitted this Thesis for approval on 2019-07-18 at 11:07.This Thesis was approved for publication on 2019-07-18 at 16:45.DSpace SAF Submission Ingestion Package generated from Vireo submission #14371 on 2019-11-26 at 13:06:18Made available in DSpace on 2019-11-26T20:49:33Z (GMT). No. of bitstreams: 2
MISHRA-THESIS-2019.pdf: 919660 bytes, checksum: 59d8199aef545f1af3db6671db9cd49d (MD5)
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Flexible bodies : British South Asian dancers in an age of neoliberalism /
No full text"Flexible Bodies charts the emergence of British South Asian dance as a distinctive dance genre. Analyzing dances, dance films, rehearsals, workshops, and touring alongside immigration policy, arts funding initiatives, citizenship discourse, and global economic conditions, author Anusha Kedhar evokes the feel of British South Asian dance as it moves from 'Cool Britannia' multiculturalism in the 1990s to fractious race relations in the wake of the July 7th, 2005 terrorist attacks to austerity measures and the fallout from the 2008 financial crisis, and, finally, to the Brexit referendum in 2016. Drawing on over a decade of ethnographic fieldwork and interviews with dancers in Britain and India, in-depth choreographic analysis of major dance works, and the author's own lived experiences as a professional dancer in London, Flexible Bodies tells the story of British South Asian dancers and the creative ways in which they negotiate the demands of neoliberal, multicultural dance markets through an array of flexible bodily practices, including agility, versatility, mobility, speed, and risk-taking. However, flexibility, the book demonstrates, is also a precarious road to success that can stretch dancers (almost) to breaking point. Theorizing flexibility as material and metaphor, the book argues that flexibility is both a tool of labor exploitation and a bodily tactic that British South Asian dancers exploit to navigate volatile economic and political conditions. With its unique focus on the everyday aspects of dancing and dance-making Flexible Bodies honors the lives and labor of dancers and their contributions to a distinct and dynamic sector"--Includes bibliographical references and index.Introduction: On neoliberalism, multiculturalism, and flexibility -- Innovation : Balancing diversity and innovation: flexibility in the era of New Labour and Cool Britannia -- Assimilation : Flexible British Asian masculinities: choreographing citizenship in the wake of the 2005 London bombings -- Mobility : Versatility, agility, adaptability: tracking the hyperflexible labor of Transnational South Asian dancers -- Risk : Breaking point?: flexibility, pain, and the calculus of risk in Neoliberal multiculturalism -- Value : Dancing out of/in the box: satirizing flexibility in The art of defining me (2013) -- Epilogue: Brexit and the uncertain future of British South Asia dance."Flexible Bodies charts the emergence of British South Asian dance as a distinctive dance genre. Analyzing dances, dance films, rehearsals, workshops, and touring alongside immigration policy, arts funding initiatives, citizenship discourse, and global economic conditions, author Anusha Kedhar evokes the feel of British South Asian dance as it moves from 'Cool Britannia' multiculturalism in the 1990s to fractious race relations in the wake of the July 7th, 2005 terrorist attacks to austerity measures and the fallout from the 2008 financial crisis, and, finally, to the Brexit referendum in 2016. Drawing on over a decade of ethnographic fieldwork and interviews with dancers in Britain and India, in-depth choreographic analysis of major dance works, and the author's own lived experiences as a professional dancer in London, Flexible Bodies tells the story of British South Asian dancers and the creative ways in which they negotiate the demands of neoliberal, multicultural dance markets through an array of flexible bodily practices, including agility, versatility, mobility, speed, and risk-taking. However, flexibility, the book demonstrates, is also a precarious road to success that can stretch dancers (almost) to breaking point. Theorizing flexibility as material and metaphor, the book argues that flexibility is both a tool of labor exploitation and a bodily tactic that British South Asian dancers exploit to navigate volatile economic and political conditions. With its unique focus on the everyday aspects of dancing and dance-making Flexible Bodies honors the lives and labor of dancers and their contributions to a distinct and dynamic sector"-
Evaluation of edge cloud service scenarios with application specific routing in the network
No full textThis thesis presents the evaluation of edge cloud service scenarios with Application Specific Routing (ASR) in the network. Edge cloud service is a computing service provided by decentralized servers which reside at the edge of the network and provide services to client devices in the local area. By being in close proximity to end users, there is a reduction in latency that may provide improved Quality of Experience (QoE). The edge cloud provides services to Internet of Things (IoT) or Cyber Physical Systems (CPS), such as, mobile phones, sensors, vehicles and augmented reality using devices like Google glass, which host real time applications and require quick response. This work evaluates the performance of such edge cloud services for mobile users in the MobilityFirst (MF) architectural framework. The Hadoop open source cloud software framework has been used in this study for parallel and distributed processing of jobs at the edge cloud site. The performance of Hadoop has been benchmarked for different network scenarios by varying the link quality: bandwidth and latency. Results show that both link parameters and edge cloud performance have a significant impact on the response time for a client’s cloud service request. Hence, this work uses both these metrics in making routing decisions to improve end users QoE with help of Virtual Network (VN) capabilities. VN on MF enables specification of customized network topologies and routing algorithms for specific application scenarios such as cloud service. ASR is one such routing algorithm that makes path selection based on application specific parameters that affect end users’ QoE such as the link and edge cloud performance metrics. The link performance metric incorporates bandwidth and latency in the link from client to the edge cloud. The edge cloud performance metric on the other hand captures the average job completion time at the edge cloud site which gives a sense of the workload, the number of nodes and the processing capability of the cluster. With the aid of ASR on MF VN, the best edge cloud site for a client’s request is chosen with the objective to minimizing the overall response time. Evaluation of users’ QoE for edge cloud services was performed on the ORBIT testbed by replicating cloud services on multiple edge cloud sites. Workload was induced at each of these sites to control the job completion time and link quality is varied to affect the link performance. Response time for a client’s request is evaluated using ASR and also using the basic anycast service in MF, for performance comparison. While anycast always chooses the nearest edge cloud, ASR provides the best response time by either choosing a lightly loaded cluster or by choosing a high quality link or a combination of both, and therefore provides a better QoE to the end user.M.S.Includes bibliographical referencesby Anusha Sheelavan
Modélisation des composites MOFs/Oxyde de graphène et leurs performances pour le captage de CO2
No full textRecently, most of the research attention has been focused on controlling global warming resulting from the emission of greenhouse gases. The advantage of developing adsorbents for physisorption-based CO2 capture resides in the reduction of energy penalty and easier recyclability. Composite systems (MOF/GO) made from the assembly of graphene oxide (GO) with Metal organic frameworks (MOFs) together with tailored functionalities have been recently revealed as promising candidates to selectively adsorb CO2 over diverse gases including N2 and CH4. In this PhD, an innovative computational methodology integrating density functional theory calculations and force field-based molecular dynamics simulation has been applied to provide a first atomistic picture of the interactions at the MOF/GO interface with the main objective to characterize the nature of the interactions between the two components, the surface coverage, the GO conformation that all together are expected to play a key role in the compatibility of the composite. As a first step, a careful attention has been paid to develop a structural model for the GO containing –hydroxyl, -epoxy and –carboxylic groups consistent with the experimental observation on the C/O ratios. As a proof of concept, the zinc-based zeolite imidazole framework ZIF-8 has been considered and its MOF surface model has been taken from our previous work. The MOF/GO interface has been further built and detailed analysis of the MOF/GO interfaces has been generated. A systematic computational exploration of the impact of the nature of the MOFs as well as of the functionalization of GO has been further deployed. Subsequently, the adsorption and separation performances were modelled for these MOF/GO systems using Monte Carlo simulations. These computational findings were supported by experimental data collected within the frame of the H2020 EU GRAMOFON and paves way towards a more rationale development of mixed matrix membranes.La problématique du réchauffement de la planète causé par l’émission de gaz à effet de serre est actuellement un enjeu sociétal majeur. La capture de CO2 par l’utilisation de matériaux poreux apparait comme une solution viable. Des composites construits à partir de l’assemblage d’oxyde de graphène (GO) et de matériaux hybrides poreux de type MOFs ont récemment été proposés comme des candidats prometteurs pour l’adsorption sélective du CO2 vis-à-vis d’autres gaz, comme N2 et CH4. Dans cette thèse, une attention particulière a été portée à la construction de modèles structuraux pour le GO incorporant différentes fonctionnalités chimiques. Une méthodologie computationnelle innovante intégrant des approches quantiques et classiques (Dynamique Moléculaire) a été ensuite mise en œuvre pour construire des modèles microscopiques des composites MOF/GO et caractériser leurs interfaces en termes de taux de recouvrement, nature des sites d’interaction et déformation du GO, des paramètres qui jouent un rôle majeur dans la compatibilité du composite. Cette étude a été menée de façon systématique en faisant varier la nature à la fois du MOF et de la fonctionnalisation du GO. Par la suite, les performances de séparation de ces systèmes ont été modélisées à l'aide de simulations Monte Carlo. Cet effort computationnel a été mené en lien étroit avec des données expérimentales issues de différentes collaborations au sein du projet H2020 EU GRAMOFON. Les conclusions de cette thèse ouvrent la voie à un développement plus rationnel des membranes à matrice mixte MOF/GO
An Aluminum Hydride That Functions like a Transition-Metal Catalyst
No full textThe reaction of [LAlH2] (L= HC(CMeNAr)(2), Ar= 2,6-iPr(2)C(6)H(3)) with MeOTf (Tf= SO2CF3) resulted in the formation of [LAlH(OTf)] (1) in high yield. The triflate substituent in 1 increases the positive charge at the aluminum center, which implies that 1 has a strong Lewis acidic character. The excellent catalytic activity of 1 for the hydroboration of organic compounds with carbonyl groups was investigated. Furthermore, it was shown that 1 effectively initiates the addition reaction of trimethylsilyl cyanide (TMSCN) to both aldehydes and ketones. Quantum mechanical calculations were carried out to explore the reaction mechanism
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