6,646 research outputs found
Whatâs next, as Facebook use in UK universities continues to grow?
How widely is Facebook used within higher education? And does âlikingâ a universityâs Facebook page really signify engagement between the student and the institution? Brian Kelly looks at whether the social networking service should be viewed as a digital mailing list, or if it has a role to play as a platform for the development of new services
Holistic approaches to eâlearning accessibility
The importance of accessibility to digital eâlearning resources is widely acknowledged. The World Wide Web Consortium Web Accessibility Initiative has played a leading role in promoting the importance of accessibility and developing guidelines that can help when developing accessible web resources. The accessibility of eâlearning resources provides additional challenges. While it is important to consider the technical and resource related aspects of eâlearning when designing and developing resources for students with disabilities, there is a need to consider pedagogic and contextual issues as well. A holistic framework is therefore proposed and described, which in addition to accessibility issues takes into account learner needs, learning outcomes, local factors, infrastructure, usability and quality assurance. The practical application and implementation of this framework is discussed and illustrated through the use of examples and case studies
Deployment of quality assurance procedures for digital library programmes
Many digital library programmes have a development philosophy based on use of open standards. In practice, however, projects may not have procedures in place to ensure that project deliverables make use of appropriate open standards. In addition there will be occasions when open standards are not sufficiently mature for deployment in a service environment or use of open standards will require expertise or resources which are not readily available
Arthroscopic management of an intraarticular osteochondroma of the hip.
The role of hip arthroscopy in the management of femoroacetabular impingement (FAI) has been advancing rapidly. In this case report, we describe the use of hip arthroscopy to successfully treat a femoral neck osteochondroma that caused a symptomatic labral tear in a 37 year old woman. Hip arthroscopy offers several advantages to surgical dislocation of the hip in the management of intraarticular pathology and FAI. Hip arthroscopy is minimally invasive without the significant trauma to hip musculature, is useful in treatment of labral tears generated by FAI, and can be used to resect small lesions on the femoral head
Archiving Web Site Resources: A Records Management View
In this paper, we propose the use of records management
principles to identify and manage Web site resources with
enduring value as records. Current Web archiving activities,
collaborative or organisational, whilst extremely valuable in their own right, often do not and cannot incorporate requirements for proper records management. Material collected under such initiatives therefore may not be reliable or authentic from a legal or archival perspective, with insufficient metadata collected about the object during its active life, and valuable materials destroyed
whilst ephemeral items are maintained. Education, training, and collaboration between stakeholders are integral to avoiding these risks and successfully preserving valuable Web-based materials.
Online Thermal Analysis of Batch Roasted Coffee Beans
We constructed and instrumented a fluidised-bed coffee roaster. This work has been carried out as part of a search for the âideal pointâ, which is the point in time when an expert roaster would terminate the roast in order to yield beans that produce the optimal brew. We roasted Costa Rican Arabica beans whilst controlling the roasting temperature to follow a linear ramp. We measured and recorded the input, output, and coffee bean surface temperatures. We introduce the idea of âbean loadâ, an uncalibrated measure of the heat load presented by the material being roasted. The bean load under constantly-ramping bean surface temperature shows the roast is increasingly endothermic. Toward the end of the roast the endothermic phenomena decrease, or are assisted by exothermic activity. The bean load also has a repeatable dip around first crack. Due to limitations with the roaster we were not able to make reliable measurements at and beyond second crack. We observed no waypoints or events that might be used to pinpoint the âideal pointâ to end the roast
A six-coordinate aryl-germanium complex formed by the KlÀui ligand
PhGeClâ reacts with Na{[OP(OEt)â]âCoCp} to give the six-coordinate complex PhClâGe{[OP(OEt)â]âCoCp}, characterised spectroscopically and by an X-ray crystal structure determination which showed a firmly-attached tridentate ligand [GeâO 1.973(2) Ă
]
Cycloauration of pyridyl sulphonamides
The pyridyl-2-alkylsulfonamides Câ
HâN(CHâ)nNHSOâR (n = 1,2; R = Me, Ph or p-CâHâMe) and 8-(p-tosylamino)quinoline undergo facile cycloauration reactions with H[AuClâ] in water, giving metallacyclic complexes coordinated through the pyridyl (or quinolyl) nitrogen atom and the deprotonated nitrogen of the sulfonamide group. The complexes have been fully characterised by NMR spectroscopy, ESI mass spectrometry and elemental analysis. The X-ray crystal structures of two derivatives reveal the presence of non-planar sulfonamide nitrogen atoms. The complexes show low activity against P388 murine leukaemia cells, possibly as a result of their ease of reduction with mild reducing agents
The cycloauration of pyridine-2-thiocarboxamide ligands
Reactions of H[AuClâ] with N-substituted 2-pyridine thiocarboxamide ligands 2-(Câ
HâN)C(S)NHR (R= p-CâHâMe, CHâPh, Me, p-CâHâOMe) gave cycloaurated derivatives {(Câ
HâN)C(S)NR}AuClâ, with the ligand bonded as the thiol tautomer through the deprotonated SH group and the pyridine N atom to give a five-membered metallacyclic ring. The X-ray structure determination of the R = CHâPh derivative shows a square-planar gold(III) complex that dimerises in the solid state by weak Au...S intermolecular interactions. In contrast, in the reaction of H[AuClâ] with 2-(Câ
HâN)C(S)NHR where R = 2-pyridyl, the ligand was oxidised to give a 1,2,4-thiadiazolo[2,3-a]pyridinium heterocyclic ring that was crystallographically characterised
Five-coordinate gold(III) complexes of the KlĂ€ui ligands [(ηâ”-Câ Hâ )Co{P(O)(OR)â}â]â (R°=°Me, Et)
The reactions of cycloaurated gold(III) dichloride complexes [LAuClâ] (L°=°2-CâHâCHâNMeâ or 2-CâHâPPhâ NPh) with monoanionic tripodal oxygen donor KlĂ€ui ligands [(ηâ”-Câ
Hâ
)Co{P(O)(OR) â}â]â (R°=°Me or Et) results in the formation of cationic gold(III) salts [LAu{OP(OR) â}âCo(ηâ”-Câ
Hâ
)]+. An X-ray structure determination on [(2-CâHâPPhâ NPh)Au{OP(OR) â}âCo(ηâ”-Câ
Hâ
)]BFâshows that the KlĂ€ui ligand coordinates strongly to the gold through two oxygen atoms, and weakly through the third, giving the gold(III) a distorted square pyramidal geometry. This is the first structurally characterised example of this geometry for gold(III) with ligands other than those containing rigid bipyridine or phenanthroline backbones. In solution at room temperature there is rapid interchange (on the NMR timescale) between the oxygen atoms of the KlĂ€ui ligands, which is frozen out on cooling
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