cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Magnetic hydrogels derived from polysaccharides with improved specific power absorption: potential devices for remotely triggered drug delivery
Creators: name: Hernandez, R.
name: Sacristan, J.
name: Asin, L.
name: Torres, T. E.
name: Ibarra, M. R.
name: Goya, G. F.
name: Mijangos, C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report on novel ferrogels derived from polysaccharides (sodium alginate and chitosan) with embedded iron oxide nanoparticles synthesized in situ and their combination with thermally responsive poly (N-isopropylacrylamide) for externally-driven drug release using AC magnetic fields. Samples were characterized by Raman spectroscopy, transmission electron microscopy (TEM) and magnetic measurements. The obtained nanoparticles were found to be of ca. 10 nm average size, showing magnetic properties very close to those of the bulk material. The thermal response was measured by power absorption experiments, finding specific power absorption (SPA) values between 100-300 W/g, which was enough for attaining the lower critical solution temperature (LCST) of the polymeric matrix within few minutes. This fast response makes these materials good candidates for externally controlled drug release.
description: 26 pages, 7 figures
Intrinsic spin-Hall accumulation in honeycomb lattices: Band structure effects
Creators: name: Liu, Ming-Hao
name: Bihlmayer, Gustav
name: Blügel, Stefan
name: Chang, Ching-Ray
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: 530 Physik
subject: 73.23.−b, 72.25.−b, 71.70.Ej

description: Local spin and charge densities on a two-dimensional honeycomb lattice are calculated by the Landauer-Keldysh formalism (LKF). Through the empirical tight-binding method, we show how the realistic band structure can be brought into the LKF. Taking the Bi(111) surface, on which strong surface states and Rashba spin-orbit coupling are present [Phys. Rev. Lett. 93, 046403 (2004)], as a numeric example, we show typical intrinsic spin-Hall accumulation (ISHA) patterns thereon. The Fermi-energy-dependence of the spin and charge transport in two-terminal nanostructure samples is subsequently analyzed. By changing EF, we show that the ISHA pattern is nearly isotropic (free-electron-like) only when EF is close to the band bottom, and is sensitive/insensitive to EF for the low/high bias regime with such EF. With EF far from the band bottom, band structure effects thus enter the ISHA patterns and the transport direction becomes significant.
Another way to divide: the case of anammox bacteria
Creators: name: Rachel, Reinhard
Publisher: name: Universität Regensburg
Year: 2009
Subjects: subject: 570 Biowissenschaften, Biologie

description: Anammox bacteria exhibit remarkable and characteristic metabolic features that enable them to oxidize ammonium under anoxic conditions. Their ultrastructure is complex, with three compartments, comprising paryphoplasm, the riboplasm and the anammoxosome. The latter is surrounded by ladderane lipids, creating a lipid-surrounded organelle within the riboplasm. In this edition of Molecular Microbiology, van Niftrik and co-workers present detailed ultrastructural investigations that, together with the analysis of the product of a predicted gene and its localization in ultrathin sections, provide the first hints at the way in which these cells divide.
Refugee mentoring: the comfort of strangers
Creators: name: Bellemore, Phillipa
Publisher: name: Macquarie University
Year: 2023
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: With more than 68.5 million refugees globally, integrating refugees into receiving communities is a key concern. Australia’s refugee settlement policy rests on the three Es: English, employment and education. But this approach does not address social, emotional or ontological security needs, nor does it acknowledge the desire of the local community to connect with their new neighbours. My study investigates the bonds between refugees and local people in Australia, via an examination of three urban refugee mentoring programs, that link trained volunteers with an individual refugee or refugee family. A key question this study considers is the extent to which mentoring programs assist refugees in forming meaningful relationships with their local communities. Drawing on a transdisciplinary approach that privileges everyday life, this thesis engages in empirical scholarship through interviews with refugees, mentors and mentor coordinators through an online mentor survey and ethnographic research conducted in Sydney, Brisbane and Adelaide.
On an interpersonal level, this thesis explores rich long-term mentoring relationships, and nuanced accounts are given of these bonds. This research contributes to contemporary scholarship on intercultural encounter and explores how asymmetrical power relationships can be enacted through contact programs such as refugee mentoring. The study reveals that many mentors reconcile their frustration at government refugee and asylum seeker policies by engaging in mentoring in what I call a “quiet act of civil defiance”. I propose a typology of mentoring bonds that ranges from fragile to immersive and argue that an ethic-of-care approach offers hope, comfort and welcome to refugees in the face of government and institutional inaction. 
On an institutional level, paradigms of mentoring are investigated and three distinct models are identified, including biopolitical subjects, an ethic of care and cosmopolitan encounters, which attempt to prescribe the nature of relationships. Judgemental attitudes to English language skills lead to a “language pedestal paradox” where refugees face demands for English proficiency without adequate support to acquire it. Empirical evidence offers insights into warm contact spaces, such as libraries, to illustrate how the personal capacities and ontological security of refugees can be increased. These spaces offer warmth in the sense of care encountered by refugees. The thesis calls for programs to move beyond romanticised notions of intercultural contact to embrace the unpredictable and contradictory nature of these relationships. I argue that deeper understanding of intercultural, social and spatial relations involves recognition of the importance of relational bonds. Underlining intercultural relationships must be recognition of the importance of social bridges between refugees and their new communities.
The Iho670 Fibers of "Ignicoccus hospitalis": a New Type of Archaeal Cell Surface Appendage
Creators: name: Müller, Daniel W.
name: Meyer, Carolin
name: Gürster, Sonja
name: Küper, Ulf
name: Huber, Harald
name: Rachel, Reinhard
name: Wanner, Gerhard
name: Wirth, Reinhard
name: Bellack, Annett
Publisher: name: Universität Regensburg
Year: 2009
Subjects: subject: 570 Biowissenschaften, Biologie

description: Ignicoccus hospitalis forms many cell surface appendages, the Iho670 fibers (width, 14 nm; length, up to 20 µm), which constitute up to 5% of cellular protein. They are composed mainly of protein Iho670, possessing no homology to archaeal flagellins or fimbrins. Their existence as structures different from archaeal flagella or fimbriae have gone unnoticed up to now because they are very brittle.
Super Stability of Laminar Vortex Flow in Superfluid 3He-B
Creators: name: Eltsov, V. B.
name: de Graaf, R.
name: Heikkinen, P. J.
name: Hosio, J. J.
name: Hanninen, R.
name: Krusius, M.
name: L'vov, V. S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Vortex flow remains laminar up to large Reynolds numbers (Re~1000) in a cylinder filled with 3He-B. This is inferred from NMR measurements and numerical vortex filament calculations where we study the spin up and spin down responses of the superfluid component, after a sudden change in rotation velocity. In normal fluids and in superfluid 4He these responses are turbulent. In 3He-B the vortex core radius is much larger which reduces both surface pinning and vortex reconnections, the phenomena, which enhance vortex bending and the creation of turbulent tangles. Thus the origin for the greater stability of vortex flow in 3He-B is a quantum phenomenon. Only large flow perturbations are found to make the responses turbulent, such as the walls of a cubic container or the presence of invasive measuring probes inside the container.
description: 4 pages, 6 figures
Daily living transactions: Understanding how children and carers work together to complete daily living tasks and routines when the child has cerebral palsy.
Creators: name: Heesh, Robyn
Publisher: name: Australian Catholic University
Year: 2018

description: Objective: This research explored how children with cerebral palsy (CP) functioning at Gross Motor Function Classification System (GMFCS) levels IV and V work together with their carers to complete daily routines. It aimed to investigate the activities and skills that are important and may inform goal setting and intervention planning for children and carers. Design: An explanatory sequential mixed methods study. Method: Non-ambulant children (GMFCS IV and V) aged 5-18 years and their carers were recruited from the Victorian Cerebral Palsy Register. A study specific survey and the Caregiver Priorities and Child Health Index of Life with Disabilities (CPCHILD), were used to describe the children, carers, and their daily routines. Descriptive statistics were used to rank routines according to importance, level of assistance and difficulty. Data collected from video elicited interviews in the homes of five child/carer pairs was then analysed using qualitative methodology. The thematic analysis of the interviews examined what happened and the transactions between child and carer that occur during daily routines. Results: Survey data were obtained from 78 carers of children with CP (child mean age 12.3 years, SD 3.7 years; female n=39; GMFCS IV, n=23). Nine young people also completed the youth version of the CPCHILD. All routines were rated as important. Some were completed with greater ease and higher rates of independence, with some children able to contribute to easier routines such as sitting in a wheelchair, eating, and moving indoors/outdoors. Findings from the five child/carer interviews highlighted how carers and children work together during routines. Themes were derived describing how families negotiate a busy life, and the child, carer and contextual factors that influence routines and that change on a daily basis. Children used a range of small but important skills that contributed to the completion of daily routines, such as closing their hands for upper limb dressing, leaning forward for hygiene routines, and relaxing their body to be hoisted safely. Conclusion: Children with CP functioning at GMFCS levels IV and V will always need assistance, but there are small skills and actions that they can learn and use to positively influence daily routines. In-depth examination of five child/carer pairs provided rich information about how they work together to complete routines, even on ‘difficult’ days. This new and important knowledge may inform therapy interventions that addresses and value the skills of both the child and their carer that are useful during daily routines.
Persistent spin helix in Rashba-Dresselhaus two-dimensional electron systems
Creators: name: Liu, Ming-Hao
name: Chen, Kuo-Wei
name: Chen, Son-Hsien
name: Chang, Ching-Ray
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: 530 Physik
subject: 72.25.Dc, 71.70.Ej, 85.75.Hh

description: A persistent spin helix (PSH) in spin-orbit-coupled two-dimensional electron systems was recently predicted to exist in two cases: [001] quantum wells (QWs) with equal coupling strengths of the Rashba and the Dresselhaus interactions (RD), and Dresselhaus-only [110] QWs. Here we present supporting results and further investigations, using our previous results [Phys. Rev. B 72, 153305 (2005)]. Refined PSH patterns for both RD [001] and Dresselhaus [110] QWs are shown, such that the feature of the helix is clearly seen. We also discuss the time dependence of spin to reexamine the origin of the predicted persistence of the PSH. For the RD [001] case, we further take into account the random Rashba effect, which is much more realistic than the constant Rashba model. The distorted PSH pattern thus obtained suggests that such a PSH may be more observable in the Dresselhaus [110] QWs, if the dopants cannot be regularly enough distributed.
Perceptions, practices, and potential: An exploration of school choice for academically gifted students
Creators: name: Gane, Sherrol
Publisher: name: Australian Catholic University
Year: 2018

description: This thesis explores the experiences academically gifted students and their families are having within a Catholic education system of schools and the impact that these experiences are having on the choice of future schooling. Parents are making the decision to commence their academically gifted child at a Catholic school and throughout the child’s schooling, choices are being considered as to whether to continue with Catholic schooling or seek an alternative. This Australian study investigates the interconnection between gifted education, school systems, school practices, families, and student experiences when deliberating the choice of school. The literature review considers the place of gifted education in the wider field of school education and sets a context for considering the educational learning experiences of the academically gifted students in this study. The review considers: characteristics of academically gifted students, theories of human development, beliefs about giftedness and gifted education, Catholic school ethos, school leadership, pedagogical practices, and school choice. Case study data from 14 primary and secondary school students, including 55 interviews, surveys and extensive document investigation, are presented and analysed. Based on Gagné’s Differentiated Model of Giftedness and Talent (2008) two major themes are guiding this analysis: intrapersonal factors and environmental factors. Bronfenbrenner’s Ecological System Theory (1977) is used in bringing the findings together. Key strengths of the Catholic schooling system in supporting academically gifted students are detailed. These strengths are: the obvious Catholic identity and ethos of the schools; the pastoral and nurturing care exhibited; and, the Newman Gifted Program for students of high ability generally in the top 15% of the population. Directions for future development are suggested. These directions are: ongoing professional learning for school leaders and classroom teachers around academic giftedness and gifted education; system resource support; and, making a clear distinction between the provision for students who are the top 15% of the population and students who are in or close to the top 1% of the population, based on a psychometric test. This research contributes to the literature about school choice, specifically for academically gifted students. The research also answers questions of why some academically gifted students are choosing to stay with the Catholic education system, and others are choosing to leave.
From Quantum Mechanics to Quantum Field Theory: The Hopf route
Creators: name: Solomon, Allan I.
name: Duchamp, Gérard Henry Edmond
name: Blasiak, Pawel
name: Horzela, Andrzej
name: Penson, Karol A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We show that the combinatorial numbers known as {\em Bell numbers} are generic in quantum physics. This is because they arise in the procedure known as {\em Normal ordering} of bosons, a procedure which is involved in the evaluation of quantum functions such as the canonical partition function of quantum statistical physics, {\it inter alia}. In fact, we shall show that an evaluation of the non-interacting partition function for a single boson system is identical to integrating the {\em exponential generating function} of the Bell numbers, which is a device for encapsulating a combinatorial sequence in a single function. We then introduce a remarkable equality, the Dobinski relation, and use it to indicate why renormalisation is necessary in even the simplest of perturbation expansions for a partition function. Finally we introduce a global algebraic description of this simple model, giving a Hopf algebra, which provides a starting point for extensions to more complex physical systems.
A change of heart: An investigation of the role of moral purpose within a model of leading for learning
Creators: name: Court, Michelle
Publisher: name: Australian Catholic University
Year: 2018

description: Researchers are advocating for a stronger focus on moral purpose and ethical leadership within school improvement processes (Burford & Bezzina, 2014; Duignan, 2006; Fullan, 2011a; Shapiro & Gross, 2013; Stefkovich & Begley, 2007); however, the relevant literature suggests this is not being operationalised for teachers in schools. At one Catholic primary school, teachers who participated in the Australian Catholic University’s Leaders Transforming Learning and Learners (LTLL) project developed a model where explicit attention to moral purpose involved teachers focusing on key values and ethics, the moral dimensions of leadership and learning. This thesis explores how explicit attention to moral purpose influenced teachers’ perceptions and practice in teaching, leading and learning. Using case study methodology within the paradigm of interpretivism, the research involved collecting and analysing qualitative data from one-to-one interviews, a focus group interview and documentary evidence. The participants were fourteen classroom teachers and three school leaders who led the school improvement process. This research found four areas where teachers focusing on moral purpose generated school improvement: a collaborative culture of practice, professional learning, professional relationships, and reflective practice. Teachers were sensitized to the moral dimensions of their work, displayed moral potency or courage and became agents of change. These findings suggest ways in which school leaders can challenge teachers’ engagement, commitment and enactment of moral purpose as a driver for change in schools.
Energized outer membrane and spatial separation of metabolic processes in the hyperthermophilic Archaeon "Ignicoccus hospitalis"
Creators: name: Küper, Ulf
name: Meyer, Carolin
name: Müller, Volker
name: Rachel, Reinhard
name: Huber, Harald
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: Archaea, ATP synthase, ATPase, immunolabeling, sulfur reductase
subject: 570 Biowissenschaften, Biologie

description: ATP synthase catalyzes ATP synthesis at the expense of an electrochemical ion gradient across a membrane that can be generated by different exergonic reactions. Sulfur reduction is the main energy-yielding reaction in the hyperthermophilic strictly anaerobic Crenarchaeon Ignicoccus hospitalis. This organism is unusual in having an inner and an outer membrane that are separated by a huge intermembrane compartment. Here we show, on the basis of immuno-EM analyses of ultrathin sections and immunofluorescence experiments with whole I. hospitalis cells, that the ATP synthase and H2:sulfur oxidoreductase complexes of this organism are located in the outer membrane. These two enzyme complexes are mandatory for the generation of an electrochemical gradient and for ATP synthesis. Thus, among all prokaryotes possessing two membranes in their cell envelope (including Planctomycetes, Gram-negative bacteria), I. hospitalis is a unique organism, with an energized outer membrane and ATP synthesis within the periplasmic space. In addition, DAPI staining and EM analyses showed that DNA and ribosomes are localized in the cytoplasm, leading to the conclusion that in I. hospitalis energy conservation is separated from information processing and protein biosynthesis. This raises questions regarding the function of the two membranes, the interaction between these compartments, and the general definition of a cytoplasmic membrane.
Disparities in definitions of drinker type and related harms: self-identified and researcher-defined drinker type and alcohol-related consequences
Creators: name: O’Donnell, R
name: Livingston, Michael
name: Room, Robin
name: Mojica Perez, Yvette
name: Callinan, Sarah
Publisher: name: La Trobe
Year: 2023
Subjects: classificationCode: 5203
subject: Clinical and health psychology
classificationCode: 4206
subject: Public health

description: No description supplied.
Unique continuation and extensions of Killing vectors at boundaries for stationary vacuum space-times
Creators: name: Chrusciel, Piotr T.
name: Delay, Erwann
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Generalizing Riemannian theorems of Anderson-Herzlich and Biquard, we show that two $(n+1)$-dimensional stationary vacuum space-times (possibly with cosmological constant $Λ\in \R$) that coincide up to order one along a timelike hypersurface $\mycal T$ are isometric in a neighbourhood of $\mycal T$. We further prove that KIDS of $\partial M$ extend to Killing vectors near $\partial M$. In the AdS type setting, we show unique continuation near conformal infinity if the metrics have the same conformal infinity and the same undetermined term. Extension near $\partial M$ of conformal Killing vectors of conformal infinity which leave the undetermined Fefferman-Graham term invariant is also established.
Bioinformatics design of cis-regulatory elements controlling human gene expression
Creators: name: Farkas, Rachelle
Publisher: name: University of British Columbia
Year: 2018

description: Gene therapy has the potential to not only treat, but cure individuals suffering from inherited diseases. Advances in understanding the human genome and the discovery of causal genes underlying diseases has heightened the need to solve the gene therapy challenge. Viral vectors are often used as a delivery tool for therapeutics, but their safety and efficacy are still being studied. To contribute to this goal, we have created 49 small viral promoters by bioinformatically annotating cis-regulatory regions from which a subset are concatenated with the goal of driving cell-specific expression of a reporter gene. We have tested a subset of these in mice in vivo. Regulatory region analysis can take a trained designer multiple weeks. To resolve this issue, we have created a semi-automated approach to regulatory region identification, named OnTarget. The OnTarget database accumulates thousands of cell and tissue-specific experiments in order to identify regions informative of regulatory properties. OnTarget is able to identify regulatory regions consistent with those identified by designers. In this capacity, we expect OnTarget to lead to better and faster identification of cis-regulatory regions for the design of promoters targeting specific sets of cells.
Impact of squark generation mixing on the search for gluinos at LHC
Creators: name: Hidaka, K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the effect of squark-generation mixing on gluino decays in the Minimal Supersymmetric Standard Model (MSSM). We show that due to the effect the quark-flavor violating (QFV) gluino decay branching ratio B(gluino -> c bar{t} (t bar{c}) + neutralino_1) can be very large (up to ~50%) in a significant part of the MSSM parameter space despite the very strong experimental constraints on QFV from B meson observables. This could have an important impact on the search for gluinos and the determination of the MSSM parameters at LHC.
description: Parallel talk at SUSY09, Boston, USA, June 2009, 4 pages, 1 figure
Business Intelligence for Small and Middle-Sized Entreprises
Creators: name: Grabova, Oksana
name: Darmont, Jérôme
name: Chauchat, Jean-Hugues
name: Zolotaryova, Iryna
Publisher: name: arXiv
Year: 2011
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Data warehouses are the core of decision support sys- tems, which nowadays are used by all kind of enter- prises in the entire world. Although many studies have been conducted on the need of decision support systems (DSSs) for small businesses, most of them adopt ex- isting solutions and approaches, which are appropriate for large-scaled enterprises, but are inadequate for small and middle-sized enterprises. Small enterprises require cheap, lightweight architec- tures and tools (hardware and software) providing on- line data analysis. In order to ensure these features, we review web-based business intelligence approaches. For real-time analysis, the traditional OLAP architecture is cumbersome and storage-costly; therefore, we also re- view in-memory processing. Consequently, this paper discusses the existing approa- ches and tools working in main memory and/or with web interfaces (including freeware tools), relevant for small and middle-sized enterprises in decision making.
Risk region estimation for light-tailed multivariate samples
Creators: name: Hou, Yiwei
Publisher: name: University of British Columbia
Year: 2017

description: Estimation of multivariate quantile regions with very small probabilities, referred to as risk regions in this report, plays an important part in various applications. Yet, it is a difficult problem since such regions contain hardly any or no data. Existing methods address the problem only for heavy-tailed distributions or for bivariate distributions with non-degenerate exponent measure that do not include the cases of asymptotic independence. In this report, we propose a more flexible framework to supplement existing approaches to risk region estimation by allowing tails of the underlying distribution to be light as well as covering situations of tail independence. In particular, we concentrate on a class of distributions assumed to have a density function with homothetic level sets. In simulation studies, reasonable performance of our proposed method is demonstrated. We also present two real-life applications to further illustrate the flexibility and performance of our method.
MPEC 2023-X142 : 2000 YS134
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Ciphertext Policy Attribute based Encryption with anonymous access policy
Creators: name: Balu, A.
name: Kuppusamy, K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: In Ciphertext Policy Attribute based Encryption scheme, the encryptor can fix the policy, who can decrypt the encrypted message. The policy can be formed with the help of attributes. In CP-ABE, access policy is sent along with the ciphertext. We propose a method in which the access policy need not be sent along with the ciphertext, by which we are able to preserve the privacy of the encryptor. The proposed construction is provably secure under Decision Bilinear Diffe-Hellman assumption.
Appendage-Mediated Surface Adherence of "Sulfolobus solfataricus"
Creators: name: Zolghadr, Behnam
name: Klingl, Andreas
name: Koerdt, Andrea
name: Driessen, Arnold J. M.
name: Rachel, Reinhard
name: Albers, Sonja-Verena
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: 570 Biowissenschaften, Biologie

description: Attachment of microorganisms to surfaces is a prerequisite for colonization and biofilm formation. The hyperthermophilic crenarchaeote Sulfolobus solfataricus was able to attach to a variety of surfaces, such as glass, mica, pyrite, and carbon-coated gold grids. Deletion mutant analysis showed that for initial attachment the presence of flagella and pili is essential. Attached cells produced extracellular polysaccharides containing mannose, galactose, and N-acetylglucosamine. Genes possibly involved in the production of the extracellular polysaccharides were identified.
An Automated Size Recognition Technique for Acetabular Implant in Total Hip Replacement
Creators: name: Shapi'i, Azrulhizam
name: Sulaiman, Riza
name: Hasan, Mohammad Khatim
name: Kassim, Abdul Yazid Mohd
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Preoperative templating in Total Hip Replacement (THR) is a method to estimate the optimal size and position of the implant. Today, observational (manual) size recognition techniques are still used to find a suitable implant for the patient. Therefore, a digital and automated technique should be developed so that the implant size recognition process can be effectively implemented. For this purpose, we have introduced the new technique for acetabular implant size recognition in THR preoperative planning based on the diameter of acetabulum size. This technique enables the surgeon to recognise a digital acetabular implant size automatically. Ten randomly selected X-rays of unidentified patients were used to test the accuracy and utility of an automated implant size recognition technique. Based on the testing result, the new technique yielded very close results to those obtained by the observational method in nine studies (90%).
Finding direct product decompositions in polynomial time
Creators: name: Wilson, James B.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20B40, 20D15, 20D40

description: A polynomial-time algorithm is produced which, given generators for a group of permutations on a finite set, returns a direct product decomposition of the group into directly indecomposable subgroups. The process uses bilinear maps and commutative rings to characterize direct products of p-groups of class 2 and reduces general groups to p-groups using group varieties. The methods apply to quotients of permutation groups and operator groups as well.
description: 39 pages, 6 figures
Determination of the Diversity of "Rhodopirellula" Isolates from European Seas by Multilocus Sequence Analysis
Creators: name: Winkelmann, Nadine
name: Jaekel, Ulrike
name: Meyer, Carolin
name: Serrano, Wilbert
name: Rachel, Reinhard
name: Rossello-Mora, Ramon
name: Harder, Jens
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: 570 Biowissenschaften, Biologie

description: In the biogeography of microorganisms, the habitat size of an attached-living bacterium has never been investigated. We approached this theme with a multilocus sequence analysis (MLSA) study of new strains of Rhodopirellula sp., an attached living planctomycete. The development of an MLSA for Rhodopirellula baltica enabled the characterization of the genetic diversity at the species level, beyond the resolution of the 16S rRNA gene. The alleles of the nine housekeeping genes acsA, guaA, trpE, purH, glpF, fumC, icd, glyA, and mdh indicated the presence of 13 genetically defined operational taxonomic units (OTUs) in our culture collection. The MLSA-based OTUs coincided with the taxonomic units defined by DNA-DNA hybridization experiments. BOX-PCR supported the MLSA-based differentiation of two closely related OTUs. This study established a taxon-area relationship of cultivable Rhodopirellula species. In European seas, three closely related species covered the Baltic Sea and the eastern North Sea, the North Atlantic region, and the southern North Sea to the Mediterranean. The last had regional genotypes, as revealed by BOX-PCR. This suggests a limited habitat size of attached-living Rhodopirellula species.
The Victoria Falls, a species boundary for the Zambezi Parrotfish, Cyphomyrus discorhynchus (Peters, 1852), and the resurrection of Cyphomyrus cubangoensis (Pellegrin, 1936) (Mormyridae: Teleostei)
Creators: name: Kramer, Bernd
name: Van der Bank, F. Herman
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: allopatric speciation, parapatric, geographic cline, electric organ discharges, southern Africa
subject: 570 Biowissenschaften, Biologie
subject: 590 Tiere (Zoologie)

description: Cyphomyrus discorhynchus occurs in the Zambezi River and in the linked systems of the Kwando and the Okavango. We collected specimens from both above and below the Victoria Falls and recorded Electric Organ Discharges. We found a marked degree of anatomical differentiation among the specimens from the Zambezi delta to the Victoria Falls that represents a subspecific, geographical cline, reflecting the great length (1400 km) and high ecological diversity of that river section (Lower and Middle Zambezi). We confirm that the populations above the Falls (i.e. Upper Zambezi, Kwando and Okavango) are differentiated from those below, possessing fewer dorsal fin rays (a median of 30–31 rather than 33–34). The waveforms of the electric organ discharge pulses have four phases and show geographic variation but were briefer for specimens from below the Falls. We resurrect Cyphomyrus cubangoensis (Pellegrin, 1936) for the Upper Zambezi/Kwando/Okavango system.
Sustained turbulence in the three-dimensional Gross-Pitaevskii model
Creators: name: Proment, Davide
name: Nazarenko, Sergey
name: Onorato, Miguel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Other Condensed Matter (cond-mat.other)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study the 3D forced-dissipated Gross-Pitaevskii equation. We force at relatively low wave numbers, expecting to observe a direct energy cascade and a consequent power-law spectrum of the form $k^{-α}$. Our numerical results show that the exponent $α$ strongly depends on how the inverse particle cascade is attenuated at $k$'s lower than the forcing wave number. If the inverse cascade is arrested by a friction at low $k$'s, we observe an exponent which is in good agreement with the weak wave turbulence prediction $k^{-1}$. For a hypo-viscosity, a $k^{-2}$ spectrum is observed which we explain using a critical balance argument. In simulations without any low-$k$ dissipation, a condensate at $k=0$ is growing and the system goes through a strongly-turbulent transition from a four-wave to a three-wave weak turbulence acoustic regime with $k^{-3/2}$ Zakharov-Sagdeev spectrum. In this regime, we also observe a spectrum for the incompressible kinetic energy which formally resembles the Kolmogorov $k^{-5/3}$, but whose correct explanation should be in terms of the Kelvin wave turbulence. The probability density functions for the velocities and the densities are also discussed.
description: 37 pages, 22 figures
Nicht-steroidale Antiphlogistika erhöhen die Darmpermeabilität ( = Non-steroidal anti-inflammatory agents increase intestinal permeability)
Creators: name: Auer, I. O.
name: Habscheid, W.
name: Hillers, S.
name: Gerhards, W.
name: Eilles, Christoph
Publisher: name: Universität Regensburg
Year: 1987
Subjects: subject: 610 Medizin
subject: Anti-Inflammatory Agents, Non-Steroidal/therapeutic use
subject: Arthritis, Rheumatoid/drug therapy
subject: Cell Membrane Permeability/drug effects
subject: Chromium Radioisotopes/diagnostic use
subject: Crohn Disease/drug therapy
subject: Edetic Acid/diagnostic use
subject: Humans
subject: Intestinal Mucosa/drug effects
subject: Stimulation, Chemical

description: 51Cr-EDTA activity was measured in urine and blood of patients receiving non-steroidal anti-inflammatory (NSA) drug treatment and of healthy subjects and other patients (controls), after oral intake of 51Cr-EDTA, for the purpose of deciding whether NSA treatment increases urinary excretion of oral 51Cr-EDTA as an expression of increased intestinal permeability. 51Cr-EDTA activity in urine and blood of patients with rheumatoid arthritis (13) being treated with NSA was significantly higher (similar to results in 13 patients with Crohn's disease) than that of a control group (14) of patients with rheumatoid arthritis without such treatment (9) and patients without rheumatic disease (5). Both in patients with rheumatoid arthritis receiving NSA drugs and patients with Crohn's disease there was a highly significant correlation between urinary and blood activity. There was no effect of NSA drugs on renal function. The results indicate that NSA drugs increase interenterocytic permeability to an extent comparable to permeability abnormalities in Crohn's disease.
Nuclear Matter for compact stars and its properties
Creators: name: Chowdhury, Partha Roy
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A pure nucleonic equation of state (EoS) for beta equilibrated charge neutral neutron star (NS) matter is determined using density dependent effective NN interaction. This EoS is found to satisfy both the constraints from the observed mass-radius of neutron stars and flow data from heavy-ion collisions. Recent observations of the binary millisecond pulsar J1614-2230 by P. B. Demorest et al. [1] suggest that the masses lie within (1.97\pm 0.04) M_\odot (M_\odot, solar mass). Most EoS involving exotic matter, such as kaon condensates or hyperons, tend to predict maximum masses well below 2.0M_\odot and are therefore ruled out. We are able to reproduce the measured mass-radius relationship for rotating and static NS. We ensure that the star rotating not faster than the frequency limited by r-mode instability gives the maximum mass about 1.95M_\odot with radius about 10 kilometer.
description: 5 pages, 2 Figures
Localization induced by magnetic fields in carbon nanotubes
Creators: name: Marganska, Magdalena
name: del Valle, Miriam
name: Jhang, Sung Ho
name: Strunk, Christoph
name: Grifoni, Milena
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 530 Physik

description: The electronic spectra of long carbon nanotubes (CNTs) can, to a very good approximation, be obtained using the dispersion relation of graphene with both angular and axial periodic boundary conditions. In short CNTs one must account for the presence of open ends, which may give rise to states localized at the edges. When a magnetic field is applied parallel to the tube axis, it modifies both momentum quantization conditions, causing hitherto extended states to localize near the ends. We study analytically and numerically the appearance and evolution of this peculiar localization phenomenon in CNTs of any nonarmchair chirality, including the electron spin. Conductance calculations show different evolution of spin up and down states in increasing magnetic field.
Phototautomeric Equilibrium in the Lowest Excited Singlet State of 3-Hydroxyacridone
Creators: name: Wolfbeis, Otto S.
name: Huber, Christian
name: Schulman, Stephen G.
Publisher: name: Universität Regensburg
Year: 2000
Subjects: subject: 540 Chemie

description: The pH dependencies of the absorption and fluorescence emission of 3-hydroxyacridone (3-HA) were studied. Three species (the cation, the neutral molecule, and the anion) were identified in absorption. The same species, albeit at different pH ranges, were identified in fluorescence. Their decay times are highly different. In addition, a new species, having an unusually long wavelength emission that has no equivalent in the ground state was identified in the pH 4 to Ho −4 range. This species is assigned to an excited-state tautomer formed predominately by adiabatic double-proton transfer during the lifetime of the excited state. Two mechanisms are operative: At pH 4 to Ho 0, the neutral (uncharged) species is photoprotonated at the carbonyl group and quickly undergoes photodissociation at the hydroxy group. In more acidic solutions (Ho −3 to Ho −2), the cation is exclusively excited, followed by photodissociation from the 3-hydroxy group to form the phototautomer. In the region Ho −2 to Ho 0, both mechanisms are operative, and therefore, the continuity of the fluorimetric titration curve of the cation suggests that the photoexcited cation and the phototautomer are in equilibrium, a photochemical and spectroscopic rarity.
Auger decay of 1σg and 1σu hole states of N2 molecule: disentangling decay routes from coincidence measurements
Creators: name: Semenov, S. K.
name: Schöffler, M. S.
name: Titze, J.
name: Petridis, N.
name: Jahnke, T.
name: Cole, K.
name: Schmidt, L. Ph. H.
name: Czasch, A.
name: Akoury, D.
name: Jagutzki, O.
name: Williams, J. B.
name: Osipov, T.
name: Lee, S.
name: Prior, M. H.
name: Belkacem, A.
name: Landers, A. L.
name: Schmidt-Böcking, H.
name: Weber, Th.
name: Cherepkov, N. A.
name: Dörner, R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Results of the most sophisticated measurements in coincidence of the angular resolved K-shell photo- and Auger-electrons, and of two atomic ions produced by dissociation of N2 molecule, are analyzed. Detection of photoelectrons at certain angles allows separating the Auger decay processes of the 1σg and 1σu core hole states. The Auger electron angular distributions for each of these hole states are measured as a function of the kinetic energy release of two atomic ions and are compared with the corresponding theoretical angular distributions. From that comparison one can disentangle the contributions of different repulsive doubly charged molecular ion states to the Auger decay. Different kinetic energy release values are directly related to the different internuclear distances. In this way one can trace experimentally the behavior of the potential energy curves of dicationic final states inside the Frank-Condon region. Presentation of the Auger electron angular distributions as a function of kinetic energy release of two atomic ions opens a new dimension in the study of Auger decay.
Discrimination of hepatocyte-stimulating activity from human recombinant tumor necrosis factor alpha
Creators: name: Andus, T.
name: Heinrich, P. C.
name: Bauer, J.
name: Tran-Thi, T. A.
name: Decker, K.
name: Männel, Daniela N.
name: Northoff, H.
Publisher: name: Universität Regensburg
Year: 1987
Subjects: subject: 610 Medizin
subject: Acute-Phase Proteins/biosynthesis
subject: Acute-Phase Reaction/physiopathology
subject: Animals
subject: Blood Proteins/biosynthesis
subject: Cells, Cultured
subject: Glycoproteins/pharmacology
subject: Humans
subject: Inflammation/physiopathology
subject: Interleukin-6
subject: Monocytes/physiology
subject: Monokines
subject: Proteins/physiology
subject: Rats
subject: Tumor Necrosis Factor-alpha
subject: alpha 1-Antitrypsin
subject: alpha-Macroglobulins/biosynthesis

description: The involvement of tumor necrosis factor alpha (TNF alpha) in the regulation of acute-phase protein synthesis is currently under discussion. In this study the effect of human recombinant TNF alpha on the regulation of the 4 acute-phase proteins alpha 2-macroglobulin, albumin, alpha 1-proteinase inhibitor and alpha 1-acute-phase globulin was investigated in rat hepatocyte primary cultures. No changes in synthesis of any of the 4 proteins were observed. However, an acute-phase response similar to that in vivo could be generated by conditioned media from human monocytes containing natural TNF alpha. This response remained unchanged after neutralizing TNF alpha activity by the addition of a specific antibody to TNF alpha. It is concluded that the hepatocyte-stimulating activity synthesized by human monocytes is different from TNF alpha.
Effects of direct active-site anticoagulants on the fibrinolytic function of coagulation factor Xa
Creators: name: Carter, Rolinda Louise Raphaelle
Publisher: name: University of British Columbia
Year: 2017

description: Treatment of occlusive clots (thrombi) is important for proper health yet systemic bleeding remains a major complication of thrombolytic therapy. Thus, the utility of agents such as alteplase, the current thrombolytic approved to rapidly lyse thrombi, is limited. As an alternative, our laboratory has found that cleavage products of clotting factor Xa (FXa) can enhance the generation of localized plasmin, the enzyme that degrades and solubilizes clots. This function is stabilized by blocking or chemically modifying the active site of FXa such that FXaβ, the first resulting fragment, persists. In recent years, direct oral anticoagulants (DOACs) have been approved for the treatment and prevention of venous thromboembolism and stroke in patients with atrial fibrillation. Two agents in this class of drugs, rivaroxaban and apixaban, are direct inhibitors of FXa. This dissertation addresses the effect these two DOACs have on fibrinolysis and FXa fragmentation due to their ability to block the active site of FXa. Results presented in Chapter 3 demonstrate that in normal pooled plasma, rivaroxaban and apixaban enhance clot lysis in a FX- and dose-dependent manner. Downstream effects caused by a potential reduction in thrombin generation were not the basis for the enhancement. Instead, FXaβ persisted in plasma. In purified protein experiments, FXaβ, generated in the presence of rivaroxaban and apixaban, enhanced plasmin generation by binding plasminogen. Results in chapter 4 showed persistence of FXaβ in rivaroxaban-treated patient samples but not in samples from non-anticoagulated patients and those treated with a thrombin-specific DOAC. A strong correlation between increasing FXaβ amounts and faster fibrinolysis time was shown in rivaroxaban-treated patients with atrial fibrillation, the approved indication in which thrombosis is the least provoked. Fibrinolysis was not, however, dose-dependently enhanced. There was also no statistical difference in fibrinolysis times between rivaroxaban-treated and non-anticoagulated atrial fibrillation patients; an observation attributed to the involvement of potential confounders. Findings in this dissertation may have implications in the use of FXa-specific DOACs as thrombolytic adjuncts and as the anticoagulants of choice in preventing post-thrombotic syndrome, a common long-term morbidity in patients with deep vein thrombosis that may result from delayed or impaired clot dissolution.
Anomalous spin Hall effects in Dresselhaus (110) quantum wells
Creators: name: Liu, Ming-Hao
name: Chang, Ching-Ray
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: 530 Physik
subject: 72.25.Dc, 71.70.Ej, 73.23.Ad

description: Anomalous spin Hall effects that belong to the intrinsic type in Dresselhaus (110) quantum wells are discussed. For the out-of-plane spin component, antisymmetric current-induced spin polarization induces opposite spin Hall accumulation, even though there is no spin-orbit force due to Dresselhaus (110) coupling. A surprising feature of this spin Hall induction is that the spin accumulation sign does not change upon bias reversal. Contribution to the spin Hall accumulation from the spin Hall induction and the spin deviation due to intrinsic spin-orbit force as well as extrinsic spin scattering can be straightforwardly distinguished simply by reversing the bias. For the in-plane component, inclusion of a weak Rashba coupling leads to a new type of Sy intrinsic spin Hall effect solely due to spin-orbit-force-driven spin separation.