The effect of different module configurations on the radiation tolerance of multijunction solar cells

The effect of different module configurations on the performance of multijunction (MJ) solar cells in a radiation environment was investigated. Module configuration refers to the electrical circuit in which the subcells of the multijunction cell are wired. Experimental data for AlCaAs, GaAs, InGaAs, and silicon single-junction concentrator cells subjected to 1 MeV electron irradiation was used to calculate the expected performance of AlGaAs/InGaAs, AlGa/silicon, GaAs/InGaAs, and GaAs/silicon Mj concentrator cells. These calculations included independent, series, and voltage-matched configurations. The module configuration was found to have a significant impact on the radiation tolerance characteristic of the MJ cells

A comparison of the radiation tolerance characteristics of multijunction solar cells with series and voltage-matched configurations

The effect of series and voltage-matched configurations on the performance of multijunction solar cells in a radiation environment was investigated. It was found that the configuration of the multijunction solar cell can have a significant impact on its radiation tolerance characteristics

Performance of GaAs and silicon concentrator cells under 37 MeV proton irradiation

Gallium arsenide concentrator cells from three sources and silicon concentrator cells from one source were exposed to 37 MeV protons at fluences up to 2.8 x 10 to the 12th protons/sq cm. Performance data were taken after several fluences, at two temperatures (25 and 80 C), and at concentration levels from 1 to about 150 x AMO. Data at one sun and 25 C were taken with an X-25 xenon lamp solar simulator. Data at concentration were taken using a pulsed solar simulator with the assumption of a linear relationship between short circuit current and irradiance. The cells are 5 x 5 mm with a 4-mm diameter illuminated area

Securing Unity and Reverence: Chinese ontological security across its maritime and frontier disputes

This thesis draws on the Constructivist school of International Relations, applying the theory of ontological security to explain diverging patterns of behaviour by China across its maritime and frontier territorial disputes. Since the establishment of the People’s Republic of China, these patterns have seen China consistently interact with states adjacent to its frontiers to settle disputes peacefully, with occasional instances of conflict. Conversely, in its maritime disputes, though varying in its levels of aggression and cooperation, China has resolutely refused to settle with disputant states. In examining these varying behaviours, it is argued that differences derive from the differing ability of China to secure its national identity between the two types of dispute. Analysing the examples of the Sino-Indian dispute and border war, the Burmese border agreement, and the ongoing South China Sea disputes, periods of conflict and settlement in these disputes are compared to changing manifestations of Chinese national identity. What results is an illustration of frontier border settlement contributing to the security of China’s identity as a unified, pluralistic nation state. The absence of national minority populations in relation to maritime disputes alternatively sees continued interaction in these disputes as securing China’s identity as the superior ‘Central Kingdom’ relative to peripheral South East Asian states, while offering little incentive for settlement. Both types of dispute can be viewed as contributing to the biographical narrative of China’s ‘Century of Humiliation’. This thesis presents a significant departure from existing studies of China’s disputes, predominantly undertaken from a Realist perspective. Additionally, it expands on existing Constructivist literature by demonstrating how national identity can result in a range of behaviours across a range of differing disputes, further validating the emerging ontological security approach within International Relations scholarship

SB41-17/18 Resolution Creating a Spring Dumpster Drive

This resolution was postponed indefinitely 24Y-1N-2A on a roll call vote during the April 25, 2018 meeting of the Associated Students of the University of Montana (ASUM)

Renewable Energy—Stop Burning Stuff

During times of crisis, resilient self-sustaining communities could isolate themselves and incrementally hook up with neighboring self-sustaining communities. This requires prior community mapping and real-time health testing abilities to enable the local supply and demand of resources to meet the needs of all residents

Exchange Rates and Commodity Markets: Global Exports of Corn, Cotton, Poultry, and Soybeans

The effects of exchange rates and risk on major commodity exporters are examined in markets constructed from the top five importers and top three exporters from 1961 to 2000. Depreciation typically stimulates exports but the impacts vary considerably. Exchange risk has virtually no negative impacts. Importer incomes raise exports for about half the exporters, and major competitor market shares affect about half the exporters.Exchange rates, commodity exports, market shares,

Presence and Voice: Understanding the Tensions over the American Church\u27s Relationship to Its Culture through the Writings of Origen, Chrysostom and Augustine

In light of the perceived and demonstrable decline of the church\u27s presence and voice in American culture, this dissertation proposes to examine and to discuss the dynamic viewpoints and tensions within the church over her presence and voice in the American culture by examining the various interpretations over the rhetoric of Christianization in the Roman Empire and how those viewpoints surface in the positions of Origen, Chrysostom and Augustine. The objective of this approach is to continue the discussion first articulated by H. Richard Niebuhr\u27s 1951 work, Christ and Culture, by showing that the way one understands the rhetoric of Christianization in the first five centuries as crystallized in the writings of Origen, Chrysostom and Augustine will reveal not only one\u27s position concerning the church\u27s place and presence in the American culture, but also the inner tensions that exists within many American churches today over the role she plays in a pluralistic society. In light of this perceived and demonstrable decline, some church leaders are suggesting a fresh examination of the Christianization within the Roman Empire (the first five centuries) in order to learn pertinent principles in rhetorical presence and voice that can find application today. Chapter one discusses the varying viewpoints (Niebuhr\u27s understanding of motifs ) that surface over this fresh examination. Chapters two, three and four discuss and align these viewpoints as they appear in the writings of Origen, Chrysostom and Augustine, arguably the three greatest church fathers/rhetors in the first five centuries of the church. Chapter five summarizes the discussion, offers current critiques and conclusions over Niebuhr\u27s Christ and Culture and presents preliminary considerations for a new hermeneutical axis that is needed for understanding the rhetorical presence and voice of the church in America today--the understanding and praxis application of the principles surrounding the knowledge and presence of the Kingdom of God

Measuring and predicting overqualification from 1972-2010 : a secondary analysis of the pooled general social survey.

The rate of overqualification, defined as a person having more education or skills than their job requires them to have, has continued to grow since the issue was first identified as a significant problem. Though evidence that suggests the rate of overqualification has continued to grow, American sociologists have shown little interest in the area in most recent years while their international counterparts have looked at the issue in abundance. This study finds thatthe amount of the workforce overqualified for their jobs from 1972- 2010 has steadily increased and possible predictors of the issue are addressed. The region where one lives and parents\u27 education may be significantly related to overqualification. In addition, a curvilinear regression analysis shows an interesting trend that occurs with overqualification and age. From binary regression analyses and a curvilinear analysis of overqualification surprising results that do not support theory and other expected hypotheses are found

Design considerations for lunar base photovoltaic power systems

A survey was made of factors that may affect the design of photovoltaic arrays for a lunar base. These factors, which include the lunar environment and system design criteria, are examined. A photovoltaic power system design with a triangular array geometry is discussed and compared to a nuclear reactor power systems and a power system utilizing both nuclear and solar power sources