Luke Sunderland, Rebel barons: resisting royal power in medieval culture

This is the final version. Available from H-France via the link in this record.

Duty and Desertion: Simon of Montfort and the Fourth Crusade

This is the author accepted manuscript. The final version is available from Stichting Leidschrift via the link in this recor

Luke Sunderland, Rebel barons: resisting royal power in medieval culture

This is the final version. Available from H-France via the link in this record.

Investigation of microwave-assisted concrete recycling using single-particle testing

Microwave heating stands as a strong candidate for selective liberation of multiphase materials like concrete. It takes advantage of the differences in thermal, dielectric and mechanical properties of each of the components to create stress gradients that can lead to grain boundary fracture and embrittlement. The work and results reported are concerned with selective liberation of concrete’s raw constituents for recycling by combination of microwave heating and comminution. A single particle testing approach is presented for detailed analysis of the process. Concrete particles 10 mm in size are treated individually in a single mode cavity microwave (2.45 GHz, 2 kW) test apparatus. The microwave induced effects are quantified by single particle impact testing on a fast Hopkinson bar. Analysis of impact traces reveals a thorough embrittlement of concrete particles from microwave treatment and fragment analysis confirms the potential of microwaves for selective liberation of the raw constituents of concrete. These results validate that microwaves and comminution can be combined to liberate concrete’s raw constituents

Recycling-Oriented Investigation of Local Porosity Changes in Microwave Heated-Concrete

Large quantities of concrete waste are being produced continuously throughout the world, of which only a fraction are downcycled as construction backfill or as road-base. Seeking total concrete recyclability; this work concerns the development of microwave-based solutions for the separation of individual constituents of concrete. By focusing on the interaction between microwaves and concrete at the microscopic level, the paper makes important connections between local changes in the microwave-heated concrete texture and macroscopic changes in mechanical properties. Through analysis of the concrete texture using SEM imaging, it is found that the microwave heating of concrete causes fracture porosity. The size and shape of fracture porosity can be correlated with recycling performance indicators namely aggregate liberation, concrete strength and product fineness.. In particular, the work finds that only a short exposure to microwaves promotes the formation of a primary fracture network responsible for selective liberation of aggregates. Longer exposure to microwave heating creates a secondary network of smaller fractures that spreads throughout the cement phase, which is directly associated with the changes in mechanical strength of concrete and product fineness. The work introduces the concept of textural versus physical liberation, and shows that while microwave heating creates a high selective textural liberation of aggregate particles, the comminution of microwave-heated concrete may not necessarily yield high physical liberation. The work concludes that the key to designing a microwave-based process for concrete recycling resides in finding comminution and separation technologies that can best harvest the benefits of the textural and mechanical changes produced by microwave heating

Chasing the link between processability and texture in multiphase materials

Using concrete recycling process design as an illustrative example, this paper supports the concept that efficient comminution and separation process design should be based on understanding, and then exploiting, known links between textural properties and processing performance criteria

A development of logistics management models for the Space Transportation System

A new analytic queueing approach was described which relates stockage levels, repair level decisions, and the project network schedule of prelaunch operations directly to the probability distribution of the space transportation system launch delay. Finite source population and limited repair capability were additional factors included in this logistics management model developed specifically for STS maintenance requirements. Data presently available to support logistics decisions were based on a comparability study of heavy aircraft components. A two-phase program is recommended by which NASA would implement an integrated data collection system, assemble logistics data from previous STS flights, revise extant logistics planning and resource requirement parameters using Bayes-Lin techniques, and adjust for uncertainty surrounding logistics systems performance parameters. The implementation of these recommendations can be expected to deliver more cost-effective logistics support

Using creative writing to explore facilitation skills in practice

Background: Facilitation skills are key to the effective use of practice development strategies. Students on a Masters in Practice Development and Innovation undertake a module on Facilitation skills which incorporates the use of a creative writing piece to explore facilitation. The aim of this article is to critically reflect on the use of creative writing within an assignment from the lecturer perspective. Critical Reflection: Rolfe et al (2001) model of reflection will be utilised to structure the reflections, considering the questions ‘What?’, ‘So What?’ and ‘Now What?’. This will discuss the concerns about the assessment method, student thoughts, relationship to practice development and evidence of effectiveness of the strategy. Examples of creative writing from the students will be used to demonstrate the diversity of the approach. Ethics: All students have given permission for their work to be included Discussion: Using creative writing can be freeing for students as they can use their voice to explore a topic. For the lecturer courage is needed to facilitate this expression but is rewarding as links to the principles of practice development to embed new ways of working. Important within the process is the need to give students ‘permission’ to utilise a non-traditional style of writing and the lecturer may benefit from practising the technique themselves to feel comfortable with the creative writing strategy. Conclusion: Creative writing enabled an opportunity to explore facilitation in different ways and relate to different aspects of real and imagined life. This paper shows that creative writing can be used successfully by students to engage in novel ways of thinking. However, future actions identify the importance of guidance regarding relevance to academia and ensuring the lecturer is familiar with the aim and techniques of the process when using it for Masters level assessment

Potential applications of expert systems and operations research to space station logistics functions

The applicability of operations research, artificial intelligence, and expert systems to logistics problems for the space station were assessed. Promising application areas were identified for space station logistics. A needs assessment is presented and a specific course of action in each area is suggested

Reform and custom: The statutes of Pamiers in early thirteenth-century Christendom

This is the author accepted manuscript. The final version is available from Brepols via the DOI in this record.Leverhulme Trus