Matching Items (7)

153062-Thumbnail Image.png

Hybrid Judaism: Irving Greenberg and the encounter with American Jewish identity

Description

Over the course of more than half a century, Rabbi Dr. Irving Greenberg has developed a distinctive theology of intra- and inter-group relations. Deeply influenced by his experiences in the

Over the course of more than half a century, Rabbi Dr. Irving Greenberg has developed a distinctive theology of intra- and inter-group relations. Deeply influenced by his experiences in the Christian-Jewish dialogue movement, Greenberg's covenantal theology and image of God idea coalesce into what I refer to as Hybrid Judaism, a conceptualization that anticipated key aspects David Hollinger's notion of Postethnicity. As such, Greenberg's system of thought is mistakenly categorized (by himself, as well as others) as an expression of pluralism. The twentieth century arc of social theories of group life in America, from Melting Pot to Postethnicity by way of Cultural Pluralism, serves to highlight the fact that Greenberg is better located at the latter end of this arc (Postethnicity), rather than in the middle (Pluralism). Central to Greenberg's proto-postethnic theology is the recognition of the transformative power of encounter in an open society. Greenberg's ideas are themselves the product of such encounters. Understood fully, Hybrid Judaism has great relevance for American Jewish identity in the twenty-first century.

Contributors

Agent

Created

Date Created
  • 2014

152663-Thumbnail Image.png

Advanced hybrid solar cell approaches for future generation ultra-high efficiency photovoltaic devices

Description

Increasing the conversion efficiencies of photovoltaic (PV) cells beyond the single junction theoretical limit is the driving force behind much of third generation solar cell research. Over the last half

Increasing the conversion efficiencies of photovoltaic (PV) cells beyond the single junction theoretical limit is the driving force behind much of third generation solar cell research. Over the last half century, the experimental conversion efficiency of both single junction and tandem solar cells has plateaued as manufacturers and researchers have optimized various materials and structures. While existing materials and technologies have remarkably good conversion efficiencies, they are approaching their own limits. For example, tandem solar cells are currently well developed commercially but further improvements through increasing the number of junctions struggle with various issues related to material interfacial defects. Thus, there is a need for novel theoretical and experimental approaches leading to new third generation cell structures. Multiple exciton generation (MEG) and intermediate band (IB) solar cells have been proposed as third generation alternatives and theoretical modeling suggests they can surpass the detailed balance efficiency limits of single junction and tandem solar cells. MEG or IB solar cell has a variety of advantages enabling the use of low bandgap materials. Integrating MEG and IB with other cell types to make novel solar cells (such as MEG with tandem, IB with tandem or MEG with IB) potentially offers improvements by employing multi-physics effects in one device. This hybrid solar cell should improve the properties of conventional solar cells with a reduced number of junction, increased light-generated current and extended material selections. These multi-physics effects in hybrid solar cells can be achieved through the use of nanostructures taking advantage of the carrier confinement while using existing solar cell materials with excellent characteristics. This reduces the additional cost to develop novel materials and structures. In this dissertation, the author develops thermodynamic models for several novel types of solar cells and uses these models to optimize and compare their properties to those of existing PV cells. The results demonstrate multiple advantages from combining MEG and IB technology with existing solar cell structures.

Contributors

Agent

Created

Date Created
  • 2014

150751-Thumbnail Image.png

Standalone mild hybrid system development and application for non-hybrid vehicles

Description

While the implementation of both mild hybrid and start-stop technology is widespread as a factory option in newer vehicles, the adaptation of hybrid technology to older or unequipped vehicles has

While the implementation of both mild hybrid and start-stop technology is widespread as a factory option in newer vehicles, the adaptation of hybrid technology to older or unequipped vehicles has not been fully realized. As such, a straight forward hybrid conversion system that is easily adapted to different vehicles regardless of drivetrain configuration, has been developed and applied to a test vehicle for less than $2,000. System performance was recorded both before and after hybridization using real world drive cycle tracking charts. The vehicle established a fuel economy baseline of 22.93 mpg, and achieved 26.58 mpg after the conversion. This corresponds to a 15.92% increase in fuel economy. Accounting for initial system costs and annual fuel saving, this corresponds to a 6-year payback period. Based on these results, it can be concluded that an inexpensive aftermarket hybrid system is both feasible and effective at improving fuel economy.

Contributors

Agent

Created

Date Created
  • 2012

151914-Thumbnail Image.png

Small-scale hybrid rocket test stand & characterization of swirl injectors

Description

Derived from the necessity to increase testing capabilities of hybrid rocket motor (HRM) propulsion systems for Daedalus Astronautics at Arizona State University, a small-scale motor and test stand were designed

Derived from the necessity to increase testing capabilities of hybrid rocket motor (HRM) propulsion systems for Daedalus Astronautics at Arizona State University, a small-scale motor and test stand were designed and developed to characterize all components of the system. The motor is designed for simple integration and setup, such that both the forward-end enclosure and end cap can be easily removed for rapid integration of components during testing. Each of the components of the motor is removable allowing for a broad range of testing capabilities. While examining injectors and their potential it is thought ideal to obtain the highest regression rates and overall motor performance possible. The oxidizer and fuel are N2O and hydroxyl-terminated polybutadiene (HTPB), respectively, due to previous experience and simplicity. The injector designs, selected for the same reasons, are designed such that they vary only in the swirl angle. This system provides the platform for characterizing the effects of varying said swirl angle on HRM performance.

Contributors

Agent

Created

Date Created
  • 2013

157519-Thumbnail Image.png

Blended Higher Education Opportunities for Refugees: A Comparative Study

Description

This study aims to gain an understanding of higher education interventions taking place in refugee camps around the world that implement hybrid online and on-site models. Through an archival, database

This study aims to gain an understanding of higher education interventions taking place in refugee camps around the world that implement hybrid online and on-site models. Through an archival, database study, this uncovers the most salient characteristics of 8 international interventions (Australian Catholic University, Borderless Higher Education for Refugees, Jesuit Worldwide Learning: Higher Education at the Margins, InZone, Kepler, Mosaik, Global Border Studies, and Education for Humanity) in regard to logistics, academics, technology, and pedagogy. The study found multiple ways in which these programs seek to increase inclusion and success of refugee learners. These techniques include (1) free tuition, (2) nutrition, security, and transportation accommodations, (3) gender equity provisions, (4) course accreditation, (5) preparatory courses, (6) student support and development, (7) durable solutions related to employment, (8) tailored curricula, (9) flexibility of course structure, (10) critical thinking & reflection, (11) hybrid, adaptable, and portable course delivery, (12) on-site technology support, and (13) accommodations related to electricity and internet connectivity.

Contributors

Agent

Created

Date Created
  • 2019

155951-Thumbnail Image.png

Evaluation of Storage Systems for Big Data Analytics

Description

Recent trends in big data storage systems show a shift from disk centric models to memory centric models. The primary challenges faced by these systems are speed, scalability, and fault

Recent trends in big data storage systems show a shift from disk centric models to memory centric models. The primary challenges faced by these systems are speed, scalability, and fault tolerance. It is interesting to investigate the performance of these two models with respect to some big data applications. This thesis studies the performance of Ceph (a disk centric model) and Alluxio (a memory centric model) and evaluates whether a hybrid model provides any performance benefits with respect to big data applications. To this end, an application TechTalk is created that uses Ceph to store data and Alluxio to perform data analytics. The functionalities of the application include offline lecture storage, live recording of classes, content analysis and reference generation. The knowledge base of videos is constructed by analyzing the offline data using machine learning techniques. This training dataset provides knowledge to construct the index of an online stream. The indexed metadata enables the students to search, view and access the relevant content. The performance of the application is benchmarked in different use cases to demonstrate the benefits of the hybrid model.

Contributors

Agent

Created

Date Created
  • 2017

150048-Thumbnail Image.png

A wireless hybrid chemical sensor for detection of environmental volatile organic compounds

Description

A wireless hybrid device for detecting volatile organic compounds (VOCs) has been developed. The device combines a highly selective and sensitive tuning-fork based detector with a pre-concentrator and a separation

A wireless hybrid device for detecting volatile organic compounds (VOCs) has been developed. The device combines a highly selective and sensitive tuning-fork based detector with a pre-concentrator and a separation column. The selectivity and sensitivity of the tuning-fork based detector is optimized for discrimination and quantification of benzene, toluene, ethylbenzene, and xylenes (BTEX) via a homemade molecular imprinted polymer, and a specific detection and control circuit. The device is a wireless, portable, battery-powered, and cell-phone operated device. The device has been calibrated and validated in the laboratory and using selected ion flow tube mass spectrometry (SFIT-MS). The capability and robustness are also demonstrated in some field tests. It provides rapid and reliable detection of BTEX in real samples, including challenging high concentrations of interferents, and it is suitable for occupational, environmental health and epidemiological applications.

Contributors

Agent

Created

Date Created
  • 2011