Transforming students through peer assessment and authentic practice

This briefing document reports on a seminar where participants were provided with the opportunity to consider how they can provide authentic assessment and involve students as peers and mentors in the assessment process within their own discipline areas. The session explored the potential benefits of these approaches and also addressed the fears and possible drawbacks of such approaches, creating the opportunity to explore these in more detail and discuss solutions and approaches to avoid. The workshop was built around three different experiences of assessment practice in the higher education sector. It used a combination of speed geeking and a world cafe to allow participants to move around the room and listen to a short presentation on each experience and contribute to a related question in a conversational manner. The first experience was based on the use of students to provide feedback to their peers on formative work. The second experience used students from one subject area to help ‘mentor’ students in a different subject area. The final experience used a conference with external delegates to provide an authentic assessment experience for students

Some Potential Issues with the Security of HTML5 IndexedDB

The new HTML5 standard provides much more access to client resources, such as user location and local data storage. Unfortunately, this greater access may create new security risks that potentially can yield new threats to user privacy and web attacks. One of these security risks lies with the HTML5 client-side database. It appears that data stored on the client file system is unencrypted. Therefore, any stored data might be at risk of exposure. This paper explains and performs a security investigation into how the data is stored on client local file systems. The investigation was undertaken using Firefox and Chrome web browsers, and Encase (a computer forensic tool), was used to examine the stored data. This paper describes how the data can be retrieved after an application deletes the client side database. Finally, based on our findings, we propose a solution to correct any potential issues and security risks, and recommend ways to store data securely on local file systems

File forensics for RAW camera image formats

Recent research in multimedia forensics has developed a variety of methods to detect image tampering and to identify the origin of image files. Many of these techniques are based on characteristics in the JPEG format, as it is the most used file format for digital images. In recent years RAW image formats have gained popularity among amateur and professional photographers. This increase in their use and possible misuse makes these file formats an important subject to file forensic examinations. The aim of this paper is to explore to which extend methods previously developed for images in JPEG format can be applied to RAW image formats

A Case-Based Reasoning Method for Locating Evidence During Digital Forensic Device Triage

The role of triage in digital forensics is disputed, with some practitioners questioning its reliability for identifying evidential data. Although successfully implemented in the field of medicine, triage has not established itself to the same degree in digital forensics. This article presents a novel approach to triage for digital forensics. Case-Based Reasoning Forensic Triager (CBR-FT) is a method for collecting and reusing past digital forensic investigation information in order to highlight likely evidential areas on a suspect operating system, thereby helping an investigator to decide where to search for evidence. The CBR-FT framework is discussed and the results of twenty test triage examinations are presented. CBR-FT has been shown to be a more effective method of triage when compared to a practitioner using a leading commercial application

Bringing technical authoring skills to life for students through an employer audience

It is crucial that students in the computing area are equipped with strong research and technical authoring skills and expertise. These are transferable lifelong skills which are sometimes difficult to develop and can be viewed as ‘dull’ by the students. This study explores a more authentic and lively approach to delivering and assessing a module on technical authoring to undergraduate computing students. Students were asked to produce work for presentation at a conference aimed at external participants mainly from local industry and business. This challenged the students in terms of their technical authoring skills and brought a professionalism and realism to the module. There were other less obvious benefits from this approach. Students gained in confidence through the work they presented but also through being ‘delegates’ at the conference and engaging in the question and answer sessions. Student feedback on the module was positive and constructive and their assessment work was of a high standard

Figures of the World

Figures of the World: The Naturalist Novel and Transnational Form overturns Eurocentric genealogies and globalizing generalizations about “world literature” by examining the complex, contradictory history of naturalist fiction. Christopher Laing Hill follows naturalism’s emergence in France and circulation around the world from North and South America to East Asia. His analysis shows that transnational literary studies must operate on multiple scales, combine distant reading with close analysis, and investigate how literary forms develop on the move. The book begins by tracing the history of naturalist fiction from the 1860s into the twentieth century and the reasons it spread around the world. Hill explores the development of three naturalist figures—the degenerate body, the self-liberated woman, and the social milieu—through close readings of fiction from France, Japan, and the United States. Rather than genealogies of European influence or the domination of cultural “peripheries” by the center, novels by Émile Zola, Tayama Katai, Frank Norris, and other writers reveal conspicuous departures from metropolitan models as writers revised naturalist methods to address new social conditions. Hill offers a new approach to studying culture on a large scale for readers interested in literature, the arts, and the history of ideas

Comparative Studies on Plasma Vitamin D Binding Protein

The plasma vitamin D binding protein (DBP) is an a-glycoprotein, synthesised and secreted by the liver, which binds specifically vitamin D and its metabolites. The DBP molecule, has a single high affinity binding site for its ligands, and is present in blood in concentrations about 1000-fold greater than the sum of all its vitamin D ligands. Previous studies have not found any change in the concentration of DBP related to various derangements in mineral homeostasis. Therefore the general view is that DBP has a passive role in the physiology of vitamin D and its metabolites, and simply acts to solubilise and transport these hydrophobic ligands in the aqueous extracellular fluid. However, differences which have been described in its affinity for various vitamin D metabolites suggest that there have been evolutionary influences on the properties of this protein. Furthermore, plasma DBP concentration has been found to change in response to a number of physiological factors, such as changing sex steroid hormone secretion. The aim of the studies presented in this thesis was to investigate variation in the plasma concentration of the DBP in a range of vertebrate species, and in response to a variety of physiological factors. The results suggest that DBP may have an active role in regulating the bioavailability, and hence the utilisation and metabolism of its ligands. DBP concentration has traditionally been measured using immunological techniques. These techniques, although fast and simple, have a number of draw-backs which can be overcome by the use of assays which rely upon functional aspects of the DBP. A saturation binding assay was modified from those described previously. Using this technique, it was found that both the circulating concentration of the DBP and its affinity for 25-hydroxyvitamin D3 (25(OH)D3) varied significantly among a wide range of species of reptiles and birds. This variation did not reflect phylogenetic relationships among the study species, suggesting that the variation was more likely to be the result of selective pressure in response to individual ecological or physiological circumstance, rather than to random mutation. In support of this, both the plasma concentration of DBP, and its affinity for 25(OH)D3 were significantly associated with a number of ecological factors which might be considered to have some significance to vitamin D and calcium homeostasis. In addition, comparative binding data suggests that the ability of the DBP to bind 25-hydroxyvitamin D2 with equal affinity to 25(OH)D3 is an evolutionary innovation of mammalian vertebrates. In order to extend the idea of genetic variation in the concentration and affinity of plasma DBP, two strains of broiler (meat-type) chickens were studied. It was found that both the concentration and the affinity of plasma DBP for 25(OH)D3 was characteristic for each strain, emphasising the sensitivity of DBP to genetic variation. A number of factors have been found to modulate the genetically determined plasma concentration of DBP. Deficiencies of dietary protein and dietary energy, and variation in concentrations of sex steroids were found to affect the circulating concentration of DBP. However, species differences were still apparent, suggesting that the sensitivity of DBP to these physiological modifiers may have developed independently in different species, and may be secondary to genetic determinants of DBP properties. The plasma DBP concentration and specific binding affinity both determine the availability of its ligands for cellular uptake. It is likely that this process is complex, and involves a combination of protein mediated and non-mediated uptake events. This makes DBP a potentially important determinant of the biological actions of its ligands. The studies in this thesis have produced two main lines of argument supporting an active role for DBP in the regulation of vitamin D metabolism and utilisation. The first is that genetic variation in the properties of plasma DBP appears to be genetically determined, and is selected for, both at the between-species, and the within-species level, than it is to random mutation. Secondly, the ability of physiological and environmental factors to modify the circulating concentration of DBP suggests that this protein is responsive to homeostatic processes. It is proposed that DBP is an active regulator of the physiological economy of vitamin D and its metabolites by being itself regulated by a number of genetic and non-genetic factors