C 2012 American Chemical Society Exotic Topological Insulator States and Topological Phase Transitions in Sb2Se3 Bi2Se3 Heterostructures Qianfan Zhang, Zhiyong Zhang, Zhiyong Zhu, Udo Schwingenschlögl, and Yi Cui* Department of Material Sciences and Engineering and Stanford Nanofabrication Facility, Stanford University, Stanford, California 94305, United States, PSE Division, KAUST, Thuwal 2395...

Farmers face enormous production risks due to unpredictable rainfall, yet most do not have any formal insurance. One explanation for this is the existence of informal network-based risk sharing. Using a randomized controlled experiment, we study the demand for, and effects of, offering formal index-based rainfall insurance in an environment of tightly knit informal risk sharing networks: sub-ca...

Subband-coded images can be transmitted in the Internet using either the TCP or the UDP protocol. Delivery by TCP gives superior decoding quality but with very long delays when the network is unreliable, whereas delivery by UDP has negligible delays but with degraded quality when packets are lost. Although images are delivered currently over the Internet by TCP, we study in this paper the use o...

PURPOSE The need to increase the number oncology clinical trials with sufficient enrollments is a well-known issue, particularly for trials targeting therapeutic applications. It is critical to identify early predictors of eventual study accrual achievement. EXPERIMENTAL DESIGN All nonpediatric phase I, I/II, II, and III therapeutic studies supported by the National Cancer Institute Cancer Th...

The limit to which the phase change memory material Ge2Sb2Te5 can be scaled toward the smallest possible memory cell is investigated using structural and optical methodologies. The encapsulation material surrounding the Ge2Sb2Te5 has an increasingly dominant effect on the material’s ability to change phase, and a profound increase in the crystallization temperature is observed when the Ge2Sb2Te...

To learn the meanings of words, children must connect referents in the world around them with the sounds they hear. One proposed mechanism for this process is cross-situational word learning: tracking associations between words and objects across time. We consider the problem of anaphora for a crosssituational word learner: after an object has been introduced it is unlikely to be named in every...

• A simple source coder is shown in Fig. 3.1. Here, the sampled speech is passed through a quantizer. The quantizer can be represented by a number of break points which partition the input signal amplitude into disjoint regions. The regions are specified by an index. The index representing a region can be mapped into a quantized value x̂[n] which is used for all input all signal values that fall...