1,146 research outputs found
Magneto–Optical Kerr Effect Microscopy Investigation on Permalloy Nanostructures
No full textThis thesis focuses on the investigation of magnetic domains in ultrasmall permalloy (Ni80Fe20) structures down to nanometre size. Magnetic domains and domain walls in nano objects are often observed using a very high resolution and high power microscope such as magnetic soft x-ray microscope, magnetic force microscopy imaging and photoemission electron microscopy. A reason for this is because the Kerr signal in nanostructures is very weak. However the results from this thesis demonstrate that magnetic domains in permalloy magnetic nanostructures can still be observed with very good contrast using a Magneto-optical Kerr effect (MOKE) microscope. The constructed Kerr microscope is a home-build wide field microscope and is able to produce magnetic domains image of permalloy nanowire as small as 245 nm, although the resolution limit of the microscope is 505 nm. For the first time, a magnetic domain in nanowire with width of 245 nm is observed using a wide-field microscope. The combination of hysteresis loops and magnetic domains observations for studying a magnetic sample provides a three-dimensional understanding of the magnetic characteristic of the sample. This is crucial in investigating nano samples as the theoretical arguments with the experimental results are always constrained by the experimental part. Three kinds of nanostructure sample were observed using the Kerr microscope; a cross nanowire, zigzag nanowire and a nanowire with notch and a nucleation pad at one end. It was found that a cross nanowire can form magnetic domains upon reversal and the junction forms a magnetisation vortex. Findings from zigzag nanowire demonstrate a complex, multiple magnetic domains formation upon magnetisation reversal. A weak domain wall pinning effect was observed in the nanowire, causing a multiple domains formation in the nanowire upon reversal. It can be confirmed that this effect was caused by the high coercivity of the nucleation pad. For the nanowire with notch, it was demonstrated that the coercivities were different at negative and positive field. But for such case, there is a relationship observed between the percentage notch depth and the coercivity at the junction
Open letter about the Whole Life Custody draft proposal by Liam Kerr MSP
No full textWe oppose the draft proposal of a Whole Life Custody (Scotland) Bill by Scottish Conservative MSP and party Justice Spokesperson Liam Kerr. In our assessment, it is as regressive and problematic in principle as it would prove to be in practice. This Open Letter acts as a written submission to the Member's Consultation on this proposed Bill
Projections of Britain in the United States of America, Australia and New Zealand : 1900-1950
No full textHeather Kerr and Lawrence Warner1. Leslie Howard and Douglas Fairbanks, Jr. : promoting the Anglo-American alliance in wartime, 1939-1943 / Fred M. Leventhal -- 2. Anglophilia and racial nationalism in the debate about US entry into World War 2 / David Goodman -- 3. Under cover : projections of British and Australian secret intelligence / Bruce Bennett -- 4. A not so genteel pen : Grace Cossington Smith’s ’British-Australian’ cartoons / Catherine Speck -- 5. ’Britons of the South Seas’: the Maori visit to London, 1911 / Mandy Treagus -- 6. Walter Murdoch, Scottish Australian English professor, on Britain / Graham Tulloch.http://trove.nla.gov.au/work/2504914
Hydrogen bonding in alcohols: its effect on the carbene insertion reaction
No full textPT: J; CR: NRCC20486 PUBL BETHELL D, 1970, CHEM COMMUN, P792 CLOSS GL, 1976, J AM CHEM SOC, V98, P8190 COGGESHALL ND, 1951, J AM CHEM SOC, V73, P5414 EISENTHAL KB, 1980, J AM CHEM SOC, V102, P6563 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 GRILLER D, UNPUB JOESTEN MD, 1974, HYDROGEN BONDING, CH5 JONES M, 1973, CARBENES KERR JA, 1967, J CHEM SOC A, P897 KIRMSE W, 1964, CARBENE CHEM LANDECK H, 1977, J PHYS CHEM-US, V81, P718 LIU MTH, 1972, CAN J CHEM, V50, P3009 SCAIANO JC, 1980, J AM CHEM SOC, V102, P7747 SENTHILNATHAN VP, 1980, J AM CHEM SOC, V102, P7637 TURRO NJ, 1980, J AM CHEM SOC, V102, P7576 VALERO J, 1980, J CHIM PHYS PHYS CHI, V77, P65 WILSON GM, 1964, J AM CHEM SOC, V86, P127; NR: 18; TC: 95; J9: J AMER CHEM SOC; PG: 3; GA: PJ911Source type: Electronic(1
Book Reviews
No full textBook Review 1Book Title: Avery's Drug Treatment. A Guide to the Properties, Choice, Therapeutic Use and Economic Value of Drugs in Disease Management Book Authors: Trevor M. Speight & Nicholas H.G. Holford (Eds.)Pp. ix + 1852. 1997. Auckland: Adis International Limited. ISBN 0-86471-036-4.Book Review 2Book Title: Management of Injuries in ChildrenBook Authors: John F.T. Glasgow & H. Kerr Graham (Eds.)Pp. x + 423. Illustrated. 1997. London: BMJ. ISBN 0-7279-0925-8
Cyber Buddy is Better than No Buddy: A Test of the Köhler Motivation Effect in Exergames.
No full textObjective: Although exergames are popular, few people take advantage of the potential of group dynamics to
motivate play (and achieve associated health bene?ts). One motivation gain phenomenon has shown promise for
motivating greater effort in partnered exergames: The Koehler effect (working at a task with a more capable partner
where one’s performance is indispensable to the group). This article examines whether a Koehler effect can be
demonstrated in an exergame by exercising with a moderately superior humanoid, software-generated partner.
Materials and Methods: Male and female (n = 120; mean age, 19.41 years) college students completed a series
of plank exercises using ‘‘CyBuddy Exercise,’’ a program developed speci?cally for this study. In a lab in an
academic building, participants completed the exercises individually and, after a rest, were randomly assigned
to complete the same exercises again, but with a ‘‘live’’ human partner (HP) presented virtually, a nearlyhuman-like,
humanoid partner (NHP), a hardly human-like, software-generated partner (HHP), or a no-partner
control condition (IC), with equal numbers in each group (i.e., n = 30). Exercise persistence, perceived exertion,
self-ef?cacy beliefs, enjoyment, and intentions to exercise were recorded and analyzed.
Results: A 4X2 analysis of variance on the (Block 2 – Block 1) difference scores showed that a signi?cant
Koehler motivation gain was observed in all partner conditions (compared with IC), but persistence was signi?cantly
greater with HPs than with either NHP or HHP humanoid partners (P < 0.05). By the conclusion of the
study, there were no signi?cant differences among the partnered conditions in perceived exertion, self-ef?cacy,
enjoyment, or future intentions to exercise.
Conclusions: These results suggest that a software-generated partner can elicit the Koehler motivation gain in
exergames, but not as strongly as a partner who is thought to be human
Between a rock and a hard place: Public theology in a post-secular age
No full textThis is the author's PDF version of a book published by SCM Press© 2013.Public theology is an increasingly important area of theological discourse with strong global networks of institutions and academics involved in it. In this book, Elaine Graham argues that Western society is entering an unprecedented political and cultural era, in which many of the assumptions of classic sociological theory and of mainstream public theology are being overturned. Whilst many of the features of the trajectory of religious decline, typical of Western modernity, are still apparent, there are compelling and vibrant signs of religious revival, not least in public life and politics - local, national and global. This requires a revision of the classic secularization thesis, as well as much Western liberal political theory, which set out separate or at least demarcated terms of engagement between religion and the public domain. Elaine Graham examines claims that Western societies are moving from 'secular' to 'post-secular' conditions and traces the contours of the 'post-secular': the revival of faith-based engagement in public sphere alongside the continuing - perhaps intensifying - questioning of the legitimacy of religion in public life. She argues that public theology must rethink its theological and strategic priorities in order to be convincing in this new 'post-secular' world and makes the case for the renewed prospects for public theology as a form of Christian apologetics, drawing from Biblical, classical and contemporary sources
Falls in Parkinson's disease: Evidence for altered stepping strategies on compliant surfaces
No full textBackground: Real-world environments comprise surfaces of different textures, densities and gradients, which can threaten postural stability and increase falls risk. However, there has been limited research that has examined how walking on compliant surfaces influences gait and postural stability in older people and PD patients. Methods: PD patients (n = 49) and age-matched controls (n = 32) were assessed using three-dimensional motion analysis during self-paced walking on both firm and foam walkways. Falls were recorded prospectively over 12 months using daily falls calendars. Results: Walking on a foam surface influenced the temporospatial characteristics for all groups, but PD fallers adopted very different joint kinematics compared with controls. PD fallers also demonstrated reduced toe clearance and had increased mediolateral head motion (relative to walking velocity) compared with control participants. Conclusions: Postural control deficits in PD fallers may impair their capacity to attenuate surface-related perturbations and control head motion. The risk of falling for PD patients may be increased on less stable surfaces
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