This paper proposes a concept of uncertain random graph in which some edges exist with some degrees in probability measure and others exist with some degrees in uncertain measure, and discusses the connectivity index of an uncertain random graph. In addition, this paper presents a concept uncertain random network in which some weights are random variables and others are uncertain variables, and...

Using legal terminology, academic institutions release teaching and examination regulations to form the statutory framework of academic programs. This terminology is one reason why students often do not know how to satisfy the program requirements laid down by the corresponding institutions. This can result in needlessly long study times. Frequent changes of those regulations and parallel valid...

The unprecedented growth, development and implementation of information technology (IT) driven by e-commerce and other technological advances have resulted in an increased demand of technology skilled workers (Reichgelt, Zhang, & Price, 2002; United States Department of Labor Bureau of Labor Statistics, 2005). In response to degree-dependent employment requirements, academic institutions have f...

For any enumeration degree a let D a be the set of s-degrees contained in a. We answer an open question of Watson by showing that if a is a nontrivial Σ2-enumeration degree, then D a has no least element. We also show that every countable partial order embeds into D a.

My academic career has been one of many firsts. I was the first in my family to graduate from college and earn degrees. faculty member Mexican heritage b...