Abstract The distributed temporal logic (DTL) is a logic for reasoning about temporal properties of distributed systems from the local point of view of the system’s agents, which are assumed to execute sequentially and to interact by means of synchronous event sharing. Different versions of DTL have been proposed over the years for a number of different applications, reflecting different perspectives on how non-local information can be accessed by each agent. In a recent paper, an automata-theoretic approach to model check DTL was proposed Subtil et al. (2020, Technical Report). Herein, we follow a different approach and adapt the bounded model-checking (BMC) algorithm for linear temporal logic to the case of DTL (see Biere et al. (2003, Adv. Comput., 58, 117–148) and Biere et al. (1999, TACAS 1999, 193–207)). For that purpose, a new notion of bounded semantics for DTL is proposed. In the BMC approach, the witness problem is translated to the satisfiability of a propositional formula that can be addressed (efficiently) by SAT solvers. An important application for this approach is verification of security protocols (Basin et al. (2011, Theoret. Comput. Sci., 412, 4007–4043); Caleiro et al. (2005, Electron. Notes Theor. Comput. Sci., 125, 67–89)).

In order for the United States to remain the global leader in engineering and technology, it must produce and retain a higher number of science, technology, engineering, and mathematics (STEM) talent. Over the past few decades, there have been a number of national initiatives that have promoted STEM education with the goal of generating student interest in science and engineering and increasing the number of students entering the STEM pipeline. Research literature confirms that teachers are the single most important factor affecting student achievement and interest in STEM subjects. Several models of teacher professional development have been reported along with the evidence of the degree of their effectiveness in promoting student interest in engineering. These professional development programs are designed to increase the engineering content knowledge of math and science teachers, thereby having a direct impact on student achievement in math and science and helping to promote a positive attitude to engineering. This paper presents the design of a teacher professional development program offered in a predominantly Hispanic region in South Texas. The professional development program provides an opportunity for teachers to participate in engineering projects, become more knowledgeable about the engineering profession, and learn new pedagogical tools that they use to develop engineering-based hands-on learning activities for their classrooms. One of the effective approaches adopted by this program is the development of creative engineering connections between the math and science concepts taught by the teacher participants and real-world engineering applications that not only can K- 12 students easily understand, but also find tangible and interesting. The paper also provides evidence of the effectiveness of the program strategies that have resulted in about 89% of the developed learning activities being successfully implemented in the teachers' classrooms. The results of the program teacher surveys and discussion of lessons learned by the program management are also presented.

The distributed temporal logic DTL is a logic for reasoning about temporal properties of discrete distributed systems from the local point of view of the system's agents, which are assumed to execute sequentially and to interact by means of synchronous event sharing. We present a sound and complete labelled tableaux system for full DTL. To achieve this, we first formalize a labelled tableaux system for reasoning locally at each agent and afterwards we combine the local systems into a global one by adding rules that capture the distributed nature of DTL. We also provide examples illustrating the use of DTL and our tableaux system.

The physical circulation in the Western Indian Ocean controls the supply of nutrients, and this, combined with the stability of the surface layer and the availability of sunlight controls the primary production. In this note, we review two papers' findings on how the physical conditions ultimately impact upon the breeding of terns, a marinetop predator in the region. Rather than trace causal links through the food chain, we show empirical connections between avian breeding and the environmental conditions, all of which appear statistically significant.

DTL is a distributed temporal logic for reasoning about temporal properties of distributed systems from the local point of view of the system's agents, which are assumed to execute sequentially and to interact by means of synchronous event sharing. We present a sound and complete labeled tableaux system for future-time DTL. To achieve this, we first formalize a labeled tableaux system for reasoning locally at each agent, which provides a system for full future-time LTL, and afterwards we combine the local systems into a global one by adding rules that capture the distributed nature of DTL.