Excess air in the noble gas groundwater paleothermometer

Master of ScienceGeologyUniversity of Michiganhttp://deepblue.lib.umich.edu/bitstream/2027.42/115443/1/39015082859235.pd

On the Depth of Deep Neural Networks: A Theoretical View

People believe that depth plays an important role in success of deep neural networks (DNN). However, this belief lacks solid theoretical justifications as far as we know. We investigate role of depth from perspective of margin bound. In margin bound, expected error is upper bounded by empirical margin error plus Rademacher Average (RA) based capacity term. First, we derive an upper bound for RA of DNN, and show that it increases with increasing depth. This indicates negative impact of depth on test performance. Second, we show that deeper networks tend to have larger representation power (measured by Betti numbers based complexity) than shallower networks in multi-class setting, and thus can lead to smaller empirical margin error. This implies positive impact of depth. The combination of these two results shows that for DNN with restricted number of hidden units, increasing depth is not always good since there is a tradeoff between positive and negative impacts. These results inspire us to seek alternative ways to achieve positive impact of depth, e.g., imposing margin-based penalty terms to cross entropy loss so as to reduce empirical margin error without increasing depth. Our experiments show that in this way, we achieve significantly better test performance.Comment: AAAI 201

Bipolaronic blockade effect in quantum dots with negative charging energy

We investigate single-electron transport through quantum dots with negative charging energy induced by a polaronic energy shift. For weak dot-lead tunnel couplings, we demonstrate a bipolaronic blockade effect at low biases which suppresses the oscillating linear conductance, while the conductance resonances under large biases are enhanced. Novel conductance plateau develops when the coupling asymmetry is introduced, with its height and width tuned by the coupling strength and external magnetic field. It is further shown that the amplitude ratio of magnetic-split conductance peaks changes from 3 to 1for increasing coupling asymmetry. Though we demonstrate all these transport phenomena in the low-order single-electron tunneling regime, they are already strikingly different from the usual Coulomb blockade physics and are easy to observe experimentally.Comment: 6 pages, 5 figure

Learning Experiences of Asian International Undergraduate Students in U.S. Universities

The number of Asian international undergraduate students in U.S. universities is constantly increasing. This significant increase in number impacts universities in regards to its mission statements, administration system, academic atmosphere, and school environment (Andrade, 2008; Bertrand & Lee, 2012; Huang, 2006). The purpose of this literature review is to help administrators and educators in U.S. universities to effectively know the overall academic performance and college life of Asian international students by introducing their learning experiences through demonstrating data and examples from existed studies. Also, this research synthesis provides college administrators and educators with practical strategies to enhance the learning experiences of Asian international undergraduate students through analyses of successful case studies from various universities across the country. Selected research studies from relevant journals reveal that learning experiences of Asian international undergraduate students have a close relationship with the administration of universities and teaching strategies of educators (Constantine, Kindaichi, Okazaki, Gainor, Baden, 2005; Hung & Hyun, 2010)

Diffusion of ICT in Rural Areas Community for Socio-Economic Development under the Platform of E-CLRC

This research study proposed a framework for Community Learning and Resources Center for ICTs literacy, awareness, skills and use in disadvantage and rural areas of developing countries, in order to improve the quality of education and socio-economic in youth using the artistic use of ICTs towards accomplishing the goal such as “No child Left Behind” owing to lack of access and monetary resources in rural and remote areas. The study conducted with tie relationship with National ICT strategy  (NICTS) and Education for All(World Education forum Dakar 2000 (WEF2k)) , it compares and lists the benefits of E-CLRC in context of NICT strategy and WEF 2000,  A series of seminars, workshops and group discussion conducted in selected areas of Gilgit-Baltistan of Pakistan including schools, communities and parents. This was a voluntarily initiated by youth to start an ICT awareness campaign in the rural areas of Pakistan. It also aims to find out the current ICT implementation level in schools and other educational Institutions. This E-CLRC will increase access to valuable information that gratifies diversified needs of various segments such as ICTs, socio-economic development and team work capability of native populace. Keywords: Information and communication technologies, E-Community Learning Resources Center, World Education Forum, CBES