The memristor is promising to be the basic cell of next-generation computation systems. Compared to the traditional MOSFET device, the memristor is efficient over energy and area. But one of the biggest challenges faced with researchers is how to program a memristor’s resistance precisely. Recently, an algorithm designed to save 8 valid bits in each memristor is proposed, but this is still not ...

Recent explorations of the oldest known rocks of marine sedimentary origin from the southwestern coast of Greenland suggest that they preserve a biogeochemical record of early life. On the basis of the age of these rocks, the emergence of the biosphere appears to overlap with a period of intense global bombardment. This finding could also be consistent with evidence from molecular biology that ...

Previous analyses have shown that the most recent common ancestor for a randomly mating population of size n would have lived approximately log 2 n generations ago; for example, a panmictic population of one million people would have a common ancestor about 20 generations in the past. Structured populations consisting of panmictic subpopulations connected by migration at frequencies as low as o...

Privacy protection on user context is one of the most important issues in ubiquitous and pervasive computing. This paper describes a new privacy protection approach that not only filters and reduces the granularity of context information to correct access level granularity, but also intelligently replace the filtered-out context information with the artificial context information considered app...

We study a class of problems called Modular Inverse Hidden Number Problems (MIHNPs). The basic problem in this class is the following: Given many pairs 〈 xi, msbk ( (α+ xi) −1 mod p )〉 for random xi ∈ Zp the problem is to find α ∈ Zp (here msbk(x) refers to the k most significant bits of x). We describe an algorithm for this problem when k > (log2 p)/3 and conjecture that the problem is hard wh...

Molecular Inflammation Research Center for Aging Intervention (MRCA), College of Pharmacy, Pusan National University, Busan 609-735, Republic of Korea Graduate School of Science and Engineering for Research, University of Toyama, Toyama 930-8555, Japan Faculty of Pharmaceutical Sciences, Nagasaki University, Nagasaki 852-8131, Japan Department of Physiology, The University of Texas Health Scien...

This paper is an expanded version of a paper presented at the EDEN conference, Vienna, June 2006. It expands the model of learner engagement in the e-portfolio process and defines types of engagement experienced by the user. The factors which impact on the type of engagement enjoyed by the user are numerous and the paper will argue that feedback provision and relevance are the two most importan...

Despite many users get timely information through various social media platforms, news websites remain important mainstream media for high-quality news articles and comprehensive news coverage. Moreover, news websites are becoming well connected with the social media platform by enabling one-click sharing, allowing readers to comment on the articles, and pushing news update to social media thro...