Spotlight: upper East Texas in slump, region holds up better than U.S.

As the U.S. and Texas slipped into recession last year, a balanced economy lessened the impact on upper East Texas. In March, the region's year-over-year nonfarm employment was down 0.4 percent, compared with the state's decline of 0.8 percent and the nation's 3.5 percent. Unemployment rates in the region's principal metros are near or below the state's 6.7 percent average.Economic conditions - Texas ; Employment - Texas

On the Speed of an Excited Asymmetric Random Walk

An excited random walk is a non-Markovian extension of the simple random walk, in which the walk's behavior at time $n$ is impacted by the path it has taken up to time $n$. The properties of an excited random walk are more difficult to investigate than those of a simple random walk. For example, the limiting speed of an excited random walk is either zero or unknown depending on its initial conditions. While its limiting speed is unknown in most cases, the qualitative behavior of an excited random walk is largely determined by a parameter $\delta$ which can be computed explicitly. Despite this, it is known that the limiting speed cannot be written as a function of $\delta$. We offer a new proof of this fact, and use techniques from this proof to further investigate the relationship between $\delta$ and speed. We also generalize the standard excited random walk by introducing a "bias" to the right, and call this generalization an excited asymmetric random walk. Under certain initial conditions we are able to compute an explicit formula for the limiting speed of an excited asymmetric random walk.Comment: 22 pages, 4 figures, presented at 2017 MAA MathFes

Kinetic Energy Investigation

Students will build a mouse trap powered car that converts elastic potential energy contained in the trap’s spring to linear kinetic energy of the car. The release of this energy results in a net force which leads to linear acceleration. This acceleration can be measured with Vernier Logger Pro®, and using Newton’s Second Law of Motion, the net force can be calculated. Finally, using the concept of work, the final kinetic energy of the car can be calculated. Once students become familiar with the calculation of work and energy, the teacher will challenge the students to modify their cars to perform within a specific energy range. This may involve modifying mass, wheel design, lever action, etc. The concept of work and energy is demonstrated in this lesson through the use of a student built car and Vernier Logger Pro®. The lesson utilizes concept application, data collection, and graphical modeling techniques to give the students an understanding of energy transfer by bridging concepts of kinematics and dynamics

Forensic science evidence in question

How should forensic scientists and other expert witnesses present their evidence in court? What kinds and quality of data can experts properly draw on in formulating their conclusions? In an important recent decision in R. v T1 the Court of Appeal revisited these perennial questions, with the complicating twist that the evidence in question incorporated quantified probabilities, not all of which were based on statistical data. Recalling the sceptical tenor of previous judgments addressing the role of probability in the evaluation of scientific evidence,2 the Court of Appeal in R. v T condemned the expert’s methodology and served notice that it should not be repeated in future, a ruling which rapidly reverberated around the forensic science community causing consternation, and even dismay, amongst many seasoned practitioners.3 At such moments of perceived crisis it is essential to retain a sense of perspective. There is, in fact, much to welcome in the Court of Appeal’s judgment in R. v T, starting with the court’s commendable determination to subject the quality of expert evidence adduced in criminal litigation to searching scrutiny. English courts have not consistently risen to this challenge, sometimes accepting rather too easily the validity of questionable scientific techniques.4 However, the Court of Appeal’s reasoning in R. v T is not always easy to follow, and there are certain passages in the judgment which, taken out of context, might even appear to confirm forensic scientists’ worst fears. This article offers a constructive reading of R. v T, emphasising its positive features whilst rejecting interpretations which threaten, despite the Court of Appeal’s best intentions, to diminish the integrity of scientific evidence adduced in English criminal trials and distort its probative value

Noteworthy: hurricane season, venture capital, exports

Ike deals severe blow to Texas economy. Texas investment funding slips in 2nd quarter. Latin America, China lead Texas surge in overseas sales.Economic conditions - Texas ; Natural disasters ; Venture capital - Texas ; International trade ; Exports

Welcome to AoB PLANTS: the open access journal for all plant biologists

The Chief Editor of AoB PLANTS highlights some of the key features of this new online, open access journal for plant biologist and sets out some of the reasons for starting

Tracking changes in everyday experiences of disability and disability sport within the context of the 2012 London Paralympics

The 2012 Paralympics was the biggest ever, the most accessible and best attended in its 64-year history. The Paralympics and ideas of disability associated with the Games provide significant opportunity for reflection on how far societal opinions, attitudes and behaviour have changed regarding disability. In 2012 – the first ever “legacy games” – an explicit aim of the Paralympics was to “transform the perception of disabled people in society”, (Channel 4), and use sport to contribute to “a better world for all people with a disability” (IPC 2011). The 2012 Games therefore came with a social agenda: to challenge the current perceptions many people have about disability and disability sport. Within this report – commissioned by the UK’s Paralympic broadcaster, Channel 4 – we consider everyday experiences of disability and disability sport within the context of the London 2012 Paralympics and televised coverage of the Games. The analysis is based 140 in-depth interviews that took place in the UK over a period of eighteen months, during the lead up to, and immediately after, the Games: between January 2011 and September 2012. Embedded in the lifeworld of our participants, we ask whether the 2012 Paralympics was successful in changing perceptions of disability

Legitimacy and procedural justice in prisons

All social situations are ‘ordered’ in some way, comprising a constantly changing set of relationships that establish the structure within which human action occurs. In many circumstances this order is hidden, even ephemeral; we are barely aware of its presence. But this is not the case in prisons. Social order in prison is in many ways highly visible: it is established and managed by the omnipresent rules that govern prison life. In large part these rules are oriented toward reproducing the extant regime. They lay down apparently strict criteria for what constitutes order and what is to be done if it is breached. But what is meant by order in prison? Most socia

C-SAW---contextual semantic alignment of ontologies: using negative semantic reinforcement

Understanding the meaning of each term in an ontology is essential for successfully integrating and aligning ontologies. Much ontology integration research to date is focused on syntactic, structural and semantic matching where the actual meaning of the concepts is disregarded. The C-SAW approach to ontology alignment is based on the Contextualizing the concepts by using a set of Semantic Alignment Words (C-SAW). The C-SAW approach is enhanced by Negative Semantic Reinforcement (NSR), where additional semantic meaning can be added to the set of Semantic Alignment Words, by considering words which are unrelated to the concept

Contextual Semantic Integration For Ontologies

Information integration in organisations has been hindered by differences in the software applications used and by the structure and semantic differences of the different data sources (de Bruijn, 2003). This is a common problem in the area of Enterprise Application Integration (EAI) where numerous ah-hoc programs have typically been created to perform the integration process. More recently ontologies have been introduced into this area as a possible solution to these problems, but most of the current approaches to ontology integration only address platform, syntactic and structural differences and do not address the semantic differences between the data sources (de Bruijn, 2003). For ontology semantic integration the underlying meaning of each element is needed. An approach based on introducing the contextualisation of the terms used in an ontology is proposed. This approach is called Contextual Semantic Integration for Ontologies