cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Geochemistry of suspended particulate matter (SPM) in the Murray-Darling River System: A conceptual isotopic/geochemical model for the fractionation of major, trace and rare earth elements
Creators: name: Douglas, G. B
name: Hart, B. T
name: Beckett, R
name: Gray, C. M
name: Oliver, R. L
Publisher: name: La Trobe
Year: 2023

description: La Trobe University Faculty of Science, Technology and Engineering Murray Darling Freshwater Research Centre

MDFRC item.

A conceptual isotopic/geochemical model is presented to explain the variation of major, trace and rare earth element (REE) geochemistry and Sr isotope systematics in suspended particulate matter (SPM) as a function of particle/colloid size. This conceptual model is an extension of a previous investigation of the origin of SPM in the Murray-Darling River system (MDRS) that utilised Sr isotope systematics to examine aspects of SPM (particle/colloid) origin, structure and mineralogy. The geochemical processes that give rise to the often coherent trends in major, trace and REE geochemistry and Sr isotopic signature as a function of particulate (<1 μm) and colloidal (>1 μm) size in the MDRS have been identified using an enhanced SPM size fractionation technique as a basis to not only obtain a broad range of particle/colloid size ranges, but also to provide sufficient material for subsequent geochemical and isotopic analysis. The conceptual isotopic/geochemical model proposed here contains three major components: (i) the differential weathering of micas and alkali (K-) feldspars to form the majority of the particulate (<1 μm) fractions (high 87Sr/86Sr ratio), which have a geochemical and Sr isotopic signature that closely resembles precursor mineralogies, (ii) the differential weathering of Na, Ca-feldspars (plagioclase) which decompose to form clay minerals in the colloidal (>1 μm) fractions (low 87Sr/86Sr ratio), with a range of geochemical signatures related to the relative proportions of inorganic and organic constituents, and (iii) the presence of natural organic matter as coatings on the particulate (<1 μm) and colloidal (>1 μm) matter and possibly as organo-colloids which exert an increasing influence in particular on bulk colloid geochemistry with decreasing colloid size. This conceptual isotopic/geochemical model also accounts for the distinct variation in major, trace and REE geochemistry and Sr isotopic systematics between the particulate (<1 μm) and colloidal (>1 μm) fractions, the variation being primarily a function of the distinctly different precursor mineralogies of the SPM fractions and geochemical fractionation during the weathering and transport. Additionally, this model explains a systematic fractionation of REE apparent within colloidal (>1 μm) fractions. Statisitcal (hierachical cluster) analysis of two particulate and three colloidal fractions from 23 samples from the MDRS is used as a basis to investigate geochemical and mineralogical associations within the particulate and colloidal size fractions and to provide additional supporting evidence for the conceptual isotopic/geochemical model.
Big Data Dreams and Reality in Shenzhen: An Investigation of Smart City Implementation in China
Creators: name: Große-Bley, Jelena
name: Kostka, Genia
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Digital governance
subject: smart city platform
subject: data centralisation
subject: China
subject: 300 Sozialwissenschaften::300 Sozialwissenschaften, Soziologie::300 Sozialwissenschaften

description: Chinese cities are increasingly using digital technologies to address urban problems and govern society. However, little is known about how this digital transition has been implemented. This study explores the introduction of digital governance in Shenzhen, one of China's most advanced smart cities. We show that, at the local level, the successful implementation of digital systems faces numerous hurdles in long-standing data management and bureaucratic practices that are at least as challenging as the technical problems. Furthermore, the study finds that the digital systems in Shenzhen entail a creeping centralisation of data that potentially turns lower administrative government units into mere users of the city-level smart platforms rather than being in control of their own data resources. Smart city development and big data ambitions thereby imply shifting stakeholder relations at the local level and also pull non-governmental stakeholders, such as information technology companies and research institutions, closer to new data flows and smart governance systems. The findings add to the discussion of big data-driven smart systems and their implications for governance processes in an authoritarian context.
Intra-articular osteoma in the stifle joint of a cat
Creators: name: Jaenich, Sebastian
name: Klass, Grace
name: Bosch, Beate
name: Unger, Martin
name: Slunsky, Pavel
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Osteoma
subject: neoplasia
subject: stifle joint
subject: surgical resection
subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche

description: Case summary A 13-year-old male castrated cat was referred to our clinic for a 2-month history of right hindlimb lameness. Radiographs and CT showed a solid bony mass within the stifle joint. The mass was resected by arthrotomy and osteotomy of the tibial tuberosity. Histopathological examination revealed the diagnosis of osteoma. Recovery from surgery was uneventful. At the 8-week follow-up examination, the cat was free of clinical signs. Relevance and novel information Feline osteomas are rare; only few cases have been reported. To the best of our knowledge, this is the first report of an intra-articular osteoma in the stifle joint of a cat and description of its surgical resection.
Event rates of Common Envelope Jets Supernovae
Creators: name: Grichener Aldana
Publisher: name: Zenodo
Year: 2022

description: Common envelope jets supernovae (CEJSNe) are transient events powered by jets that a neutron star (NS) or a black hole (BH) launch as they spiral-in inside the core of a giant star. I use the binary population synthesis code COMPAS to find the possible evolutionary paths towards CEJSNe and their event rates. I model envelope removal by jets using values of common envelope efficiency parameter α_CE>1 and constrain my results against the observations of binary compact object mergers. I find that the event rates of double compact objects mergers in my simulations are well within the error margin of these events as found by the LIGO collaboration for 0.55≤α_CE≤2. The estimated rates of NS/BH-core mergers have potential implications to high energy processes that might be explained by scenarios that involve CEJSNe.
description: Poser for the ImBaSE 2022 meeting.
Spectromicroscopy of electronic phase separation in K$_x$Fe$_{2-y}$Se$_2$ superconductor
Creators: name: Bendele, M.
name: Barinov, A.
name: Joseph, B.
name: Innocenti, D.
name: Iadecola, A.
name: Bianconi, A.
name: Takeya, H.
name: Mizuguchi, Y.
name: Takano, Y.
name: Noji, T.
name: Hatakeda, T.
name: Koike, Y.
name: Horio, M.
name: Fujimori, A.
name: Ootsuki, D.
name: Mizokawa, T.
name: Saini, N. L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Structural phase separation in A$_x$Fe$_{2-y}$Se$_2$ system has been studied by different experimental techniques, however, it should be important to know how the electronic uniformity is influenced, on which length scale the electronic phases coexist, and what is their spatial distribution. Here, we have used novel scanning photoelectron microscopy (SPEM) to study the electronic phase separation in K$_x$Fe$_{2-y}$Se$_2$, providing a direct measurement of the topological spatial distribution of the different electronic phases. The SPEM results reveal a peculiar interconnected conducting filamentary phase that is embedded in the insulating texture. The filamentary structure with a particular topological geometry could be important for the high T$_c$ superconductivity in the presence of a phase with a large magnetic moment in A$_x$Fe$_{2-y}$Se$_2$ materials.
description: 14 pages,3 figures
Additional file 1 of Evolutionary morphology of sperm in pholcid spiders (Pholcidae, Synspermiata)
Creators: name: Dederichs, Tim M.
name: Huber, Bernhard A.
name: Michalik, Peter
Publisher: name: figshare
Year: 2022
Subjects: subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology

description: Additional file 1. Voucher data.
The 6dF Galaxy Survey: Fundamental Plane Data
Creators: name: Campbell, Lachlan A.
name: Lucey, John R.
name: Colless, Matthew
name: Jones, D. Heath
name: Springob, Christopher M.
name: Magoulas, Christina
name: Proctor, Robert N.
name: Mould, Jeremy R.
name: Read, Mike A.
name: Brough, Sarah
name: Jarrett, Tom
name: Merson, Alex I.
name: Lah, Philip
name: Beutler, Florian
name: Cluver, Michelle E.
name: Parker, Quentin A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report the 6dFGS Fundamental Plane (6dFGSv) catalogue that is used to estimate distances and peculiar velocities for nearly 9,000 early-type galaxies in the local (z$
description: 21 pages, 25 figures, 9 tables, accepted for publication in MNRAS, the full versions of Tables 2, 4, 8 and 9 will be available in the MNRAS publication as online Supporting Information
Groundwater influence on the water balance and nutrient budget of a small natural wetland in Northeastern Victoria, Australia
Creators: name: Raisin, G
name: Bartley, J
name: Croome, R
Publisher: name: La Trobe
Year: 2023

description: La Trobe University Faculty of Science, Technology and Engineering Murray Darling Freshwater Research Centre

MDFRC item.

Despite the critical role of water movement in the nutrient dynamics of wetlands, few wetland studies of nutrient imports, exports and cycling have been based on comprehensive water balance studies. In particular, many investigations have underestimated the importance and role of groundwater movement. Nutrient loads entering and leaving a 2 ha reed swamp in the Kiewa Valley, North-east Victoria showed the swamp to be a nutrient source within the landscape under both base flow and storm flow conditions. During a dry period between February 1994 and January 1995 the wetland itself exported 230 kg of Total Nitrogen (115 kg ha−1 yr−1) and 24 kg of Total Phosphorus (12 kg−1 ha−1 yr−1). Investigations confirmed that the wetland was a significant discharge area, and that groundwater accounted for 97% of the surface water and 50% of the Total Nitrogen and Total Phosphorus load leaving the system. A further 30% of Total Nitrogen and 26% of Total Phosphorus leaving the wetland was not attributable to rain/dust, surface water inputs or groundwater, and most likely resulted from the flushing of previously stored nitrogen and phosphorus. A fire which burnt most of the wetland area in September 1994 had little immediate impact on nutrient loads leaving the system. The study illustrates the complexity of assessing the nutrient dynamics and hydrology of natural wetlands, and raises questions with respect to the use of such systems for the interception of diffuse source nutrient loads within rural catchments.
Preliminary examination of polymorphisms of GSTM1, GSTT1, and GSTZ1 in relation to semen quality
Creators: name: Herring, Amy H.
name: Basta, Patricia V.
name: Perreault, Sally D.
name: Olshan, Andrew F.
name: Hanley, Nancy M.
name: DeMarini, David M.
name: Luben, Thomas J.
name: Chan, Ronna L.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010

description: Environmental, lifestyle, and occupational exposures on semen quality have been investigated in epidemiological studies with inconsistent results. Genetic factors involved in toxicant activation and detoxification have been examined in relation to the risk of outcomes such as cancer, cardiovascular, and neurologic disorders. However, the effect of common genetic variants in the metabolism of toxicants on semen quality parameters has rarely been evaluated. In this analysis, we evaluated functional SNPs of three genes of the glutathione-S-transferase (GSTM1, GSTT1, GSTZ1) enzyme family.
Molecular Properties Via Induced Current Densities
Creators: name: Summa, Francesco F.
Publisher: name: Universita degli studi di Salerno
Year: 2024
Subjects: subject: CHIM/02 CHIMICA FISICA

description: 2021 - 2022
description: The PhD thesis written by Francesco F. Summa on Molecular Properties via Induced Current Densities is a careful report of a highly qualified and innovative research. Sixteen peer-reviewed publications on renowned journals in the chemical physics and theoretical chemistry areas have originated from the work reported in the thesis, besides other six publications, also co- authored by F. F. Summa on different subjects. The number, excellent quality and originality of the 16 papers mentioned above is far beyond any usual standard for a PhD student, even when the worldwide reckoned scientific excellence of the research group(s) within which the work has been performed is properly taken into account. The work done in the thesis consists of three well identified parts: theory development, SW implementation of the developed theory into the freely available SYSMOIC package and test applications of the newly developed theory and SW on a good number of carefully selected cases. All three mentioned steps of the PhD work are reported in the thesis with great clarity, perfect progression and concatenation. The writing is terse and quite accurate. After a brief and clear introduction, the general quantum mechanical framework for the treatment of a molecular system interacting with electric and magnetic time dependent fields is elegantly recapped and exposed. Chapter 3 introduces the equations defining the total current density induced by a time-independent magnetic field and illustrates in detail the procedures aimed at solving the problem of the origin dependence of the computed current density vector field. Chapter 4 deals with time-dependent perturbations and how they do result into time-dependent charge and current densities. Chapter 5 reports a number of very interesting applications, both in the static and in the dynamic regimes, of the theoretical and SW developments illustrated in the Chapter 3 and 4. The work performed in the thesis and the writing thereof both show a very high command of symmetry analysis of systems in a magnetic field and of the topological analysis and classification of current densities, two subjects which are not at all trivial. The provided list of acronyms, in the initial pages of the thesis, is highly appreciated. Overall, this thesis provides an extremely recommendable reading for those who are interested or want to be acquainted with the most recent progresses on the subject of Molecular Properties via Induced Current Densities. [Report by Carlo Gatti on the PhD thesis of Francesco F. Summa]
Diagnosing order by disorder in quantum spin systems
Creators: name: Lamas, C. A.
name: Cabra, D. C.
name: Pujol, P.
name: Rossini, G. L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this paper we study the frustrated J1-J2 quantum Heisenberg model on the square lattice for J2 > 2J1, in a magnetic field. In this regime the classical system is known to have a degenerate manifold of lowest energy configurations, where standard thermal order by disorder occurs. In order to study its quantum version we use a path integral formulation in terms of coherent states. We show that the classical degeneracy in the plane transverse to the magnetic field is lifted by quantum fluctuations. Collinear states are then selected, in a similar pattern to that set by thermal order by disorder, leaving a Z2 degeneracy. A careful analysis reveals a purely quantum mechanical effect given by the tunneling between the two minima selected by fluctuations. The effective description contains two planar (XY -like) fields conjugate to the total magnetization and the difference of the two sublattice magnetizations. Disorder in either or both of these fields produces the locking of their conjugate observables. Furthermore, within this scenario we argue that the quantum state is close to a product state.
description: 8 pages, 3 figures
Additional file 2 of Evolutionary morphology of sperm in pholcid spiders (Pholcidae, Synspermiata)
Creators: name: Dederichs, Tim M.
name: Huber, Bernhard A.
name: Michalik, Peter
Publisher: name: figshare
Year: 2022
Subjects: subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology

description: Additional file 2. Morphological characters included in this study.
The impact of tinnitus distress on cognition
Creators: name: Neff, P.
name: Simões, J.
name: Psatha, Stamatina
name: Nyamaa, Amarjargal
name: Boecking, Benjamin
name: Rausch, L.
name: Dettling-Papargyris, J.
name: Funk, C.
name: Brueggemann, Petra
name: Mazurek, Birgit
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2021
Subjects: subject: tinnitus
subject: phantom sound
subject: cognition
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Tinnitus is the chronic perception of a phantom sound with different levels of related distress. Past research has elucidated interactions of tinnitus distress with audiological, affective and further clinical variables. The influence of tinnitus distress on cognition is underinvestigated. Our study aims at investigating specific influences of tinnitus distress and further associated predictors on cognition in a cohort of n = 146 out-ward clinical tinnitus patients. Age, educational level, hearing loss, Tinnitus Questionnaire (TQ) score, tinnitus duration, speech in noise (SIN), stress, anxiety and depression, and psychological well-being were included as predictors of a machine learning regression approach (elastic net) in three models with scores of a multiple choice vocabulary test (MWT-B), or two trail-making tests (TMT-A and TMT-B), as dependent variables. TQ scores predicted lower MWT-B scores and higher TMT-B test completion time. Stress, emotional, and psychological variables were not found to be relevant predictors in all models with the exception of small positive influences of SIN and depression on TMT-B. Effect sizes were small to medium for all models and predictors. Results are indicative of specific influence of tinnitus distress on cognitive performance, especially on general or crystallized intelligence and executive functions. More research is needed at the delicate intersection of tinnitus distress and cognitive skills needed in daily functioning.
Reading the Source Code of Social Ties
Creators: name: Aiello, Luca Maria
name: Schifanella, Rossano
name: State, Bogdan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computers and Society (cs.CY)
subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: H.1.2

description: Though online social network research has exploded during the past years, not much thought has been given to the exploration of the nature of social links. Online interactions have been interpreted as indicative of one social process or another (e.g., status exchange or trust), often with little systematic justification regarding the relation between observed data and theoretical concept. Our research aims to breach this gap in computational social science by proposing an unsupervised, parameter-free method to discover, with high accuracy, the fundamental domains of interaction occurring in social networks. By applying this method on two online datasets different by scope and type of interaction (aNobii and Flickr) we observe the spontaneous emergence of three domains of interaction representing the exchange of status, knowledge and social support. By finding significant relations between the domains of interaction and classic social network analysis issues (e.g., tie strength, dyadic interaction over time) we show how the network of interactions induced by the extracted domains can be used as a starting point for more nuanced analysis of online social data that may one day incorporate the normative grammar of social interaction. Our methods finds applications in online social media services ranging from recommendation to visual link summarization.
description: 10 pages, 8 figures, Proceedings of the 2014 ACM conference on Web (WebSci'14)
Unpacking the Role of Feedback in Virtual Team Effectiveness
Creators: name: Handke, Lisa
name: Klonek, Florian
name: O’Neill, Thomas A.
name: Kerschreiter, Rudolf
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: computer-mediated communication
subject: virtual groups
subject: teamwork
subject: feedback
subject: 100 Philosophie und Psychologie::150 Psychologie::150 Psychologie

description: Feedback is a cornerstone of human development. Not surprisingly, it plays a vital role in team development. However, the literature examining the specific role of feedback in virtual team effectiveness remains scattered. To improve our understanding of feedback in virtual teams, we identified 59 studies that examine how different feedback characteristics (content, source, and level) impact virtual team effectiveness. Our findings suggest that virtual teams benefit particularly from feedback that (a) combines performance-related information with information on team processes and/or psychological states, (b) stems from an objective source, and (c) targets the team as a whole. By integrating the existing knowledge, we point researchers in the direction of the most pressing research needs, as well as the practices that are most likely to pay off when designing feedback interventions in virtual teams.
Evolving ONe WD+He WD systems to ultra-compact X-ray binaries
Creators: name: Liu, Dongdong
name: Wang, Bo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: It has been proposed that accretion-induced collapse (AIC) of massive white dwarfs (WDs) is an indispensable path for the formation of neutron star (NS) binaries. Although there are still no direct evidence for the existence of AIC events, several kinds of NS systems are suggested to originate from the AIC processes. One of the representative evidence is the detection of the strong magnetic field and slow spin NSs with ultra-light companions (<=0.1 Msun) in close orbits. However, previous studies cannot explain the formation of AIC events with such low-mass companions. In the present work, we evolve a series of ONe WD+He WD systems to the formation of AIC events (named as the He WD donor channel), and the NS binaries behave as ultra-compact X-ray binaries when the He WDs refill their Roche-lobes. We found that the ONe WD+He WD systems a possible channel for the formation of the newly formed NS+ultra-light companion systems just after the AIC event. Although there are some other inconsistent properties, the detected companion mass and orbital period of 4U 1626-67 (one of the newly formed NS binaries with ultra-light companions) can be reproduced by the He WD donor channel. In addition, combined with previous asteroseismology results, we speculate that an UCXB source (XTE J1751-305) may originate from the He WD donor channel.
description: 13 pages, 5 figures, accepted for the publication of MNRAS
Conceptions and Practices of International Fascism in Norway, Sweden and the Netherlands, 1930–40
Creators: name: Kunkeler, Nathaniël
name: Hamre, Martin Kristoffer
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: fascism
subject: national socialism
subject: internationalism
subject: Norway
subject: Netherlands
subject: Sweden
subject: 900 Geschichte und Geografie::940 Geschichte Europas::948 Geschichte Skandinaviens

description: This article explores conceptions of fascism as an international phenomenon as understood by three political parties of the 1930s: Quisling’s Norwegian Nasjonal Samling (NS), Lindholm’s Swedish Nationalsocialistiska Arbetarepartiet (NSAP) and Mussert’s Dutch Nationaal-Socialistische Beweging (NSB). In order to highlight fascist movements’ contributions to fascist internationalism, the article deploys both a comparative and transnational framework, showing up the national differences in their conceptions of international fascism, regional connections and influences, changes over time and the contingencies of transnational contact that affected the practical establishment of international relationships. It is shown that there was an impetus for international cooperation between fascist movements outside of the orbit of fascist regimes, typically sustained by regional affinities as existed among Northern countries and the Low Countries. While often framed by ambitious rhetoric, ultimately the three parties continued to focus on their own national projects rather than deepen international collaboration. Lastly the movements’ different myths of international fascism are compared, constructed for propagandistic ends, all of which broadly fit within the mould of a new European or even global era which saw the rise of fascism and the (hoped for) victory over ideological enemies such as communism and liberalism.
MicroRNA expression in the livers of inbred mice
Creators: name: Sun, Wei
name: Rusyn, Ivan
name: Wright, Fred A.
name: Williams, Robert W.
name: Lu, Lu
name: Gatti, Daniel M.
name: Threadgill, David W.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: MicroRNAs are short, non-coding RNA sequences that regulate genes at the post-transcriptional level and have been shown to be important in development, tissue differentiation, and disease. Limited attention has been given to the natural variation in miRNA expression across genetically diverse populations even though it is well established that genetic polymorphisms can have a profound effect on mRNA levels. Expression level of 577 miRNAs in the livers of 70 strains of inbred mice was assessed, and we found that miRNA expression is highly stable across different strains. Globally, the expression of miRNA target transcripts does not correlate with miRNA expression, primarily due to the low variance of miRNA but high variance of mRNA expression across strains. Our results show that there is little genetic effect on the baseline miRNA levels in murine liver. The stability of mouse liver miRNA expression in a genetically diverse population suggests that treatment-induced disruptions in liver miRNA expression, a phenomenon established for a large number of toxicants, may indicate an important mechanism for the disturbance of normal liver function, and may prove to be a useful genetic background-independent biomarker of toxicant effect.
Third Report on the Publication and Conservation of the Tomb of Ramesses III in the Valley of the Kings (KV 11)
Creators: name: Weber, Anke
name: Hovestreydt, Willem
name: Rees, Lea
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Ramesses III
subject: KV 11
subject: archive research
subject: research history
subject: early travellers
subject: 900 Geschichte und Geografie::930 Geschichte des Altertums (bis ca. 499), Archäologie::932 Geschichte Ägyptens bis 640

description: Since antiquity, the tomb of Ramesses III (KV 11) has been among the most frequently visited royal tombs in the Valley of the Kings. It was also one of the first to be described and documented in detail by European travellers in the eighteenth to nineteenth centuries. As large parts of the wall decoration of the tomb, especially in its rear, are now destroyed, the drawings, notes and squeezes of those early researchers who saw the site in its former splendour offer an invaluable resource for the reconstruction of the tomb’s unique decoration programme. The collection, revision, and publication of all relevant archive material concerning KV 11 is an important goal of The Ramesses III (KV 11) Publication and Conservation Project. The following article reports on first and preliminary results from the authors’ research in the archives of the British Library and the Victoria and Albert Museum in London, as well as the Bodleian Libraries and the Griffith Institute in Oxford, carried out in September 2019 and made possible through the Centenary Award 2019 of the Egypt Exploration Society.
Small-Scale Structuring Of Ellerman Bombs at Solar Limb
Creators: name: Nelson, C. J.
name: Scullion, E. M.
name: Doyle, J. G.
name: Freij, N.
name: Erdélyi, R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Ellerman bombs (EBs) have been widely studied in recent years due to their dynamic, explosive nature and apparent links to the underlying photospheric magnetic field implying that they may be formed by magnetic reconnection in the photosphere. Despite a plethora of researches discussing the morphologies of EBs, there has been a limited investigation of how these events appear at the limb, specifically, whether they manifest as vertical extensions away from the disc. In this article, we make use of high-resolution, high-cadence observations of an AR at the solar limb, collected by the CRISP instrument, to identify EBs and infer their physical properties. The upper atmosphere is also probed using the SDO/AIA. We analyse 22 EB events evident within these data, finding that 20 appear to follow a parabolic path away from the solar surface at an average speed of 9 km s^(-1), extending away from their source by 580 km, before retreating back at a similar speed. These results show strong evidence of vertical motions associated with EBs, possibly explaining the dynamical `flaring' (changing in area and intensity) observed in on-disc events. Two in-depth case studies are also presented which highlight the unique dynamical nature of EBs within the lower solar atmosphere. The viewing angle of these observations allows for a direct linkage between these EBs and other small-scale events in the H-alpha line wings, including a potential flux emergence scenario. The findings presented here suggest that EBs could have a wider-reaching influence on the solar atmosphere than previously thought, as we reveal a direct linkage between EBs and an emerging small-scale loop, and other near-by small-scale explosive events. However, as previous research found, these extensions do not appear to impact upon the H-alpha line core, and are not observed by the SDO/AIA EUV filters.
description: 10 pages, 7 figures, accepted to ApJ
Optimization of Long-Term Human iPSC-Derived Spinal Motor Neuron Culture Using a Dendritic Polyglycerol Amine-Based Substrate
Creators: name: Thiry, Louise
name: Clément, Jean-Pierre
name: Haag, Rainer
name: Kennedy, Timothy E.
name: Stifani, Stefano
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Human iPSCs
subject: spinal motor neurons
subject: dendritic polyglycerol amine
subject: multi-electrode array
subject: single cell RNA sequencing
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: Human induced pluripotent stem cells (hiPSCs) derived from healthy and diseased individuals can give rise to many cell types, facilitating the study of mechanisms of development, human disease modeling, and early drug target validation. In this context, experimental model systems based on hiPSC-derived motor neurons (MNs) have been used to study MN diseases such as spinal muscular atrophy and amyotrophic lateral sclerosis. Modeling MN disease using hiPSC-based approaches requires culture conditions that can recapitulate in a dish the events underlying differentiation, maturation, aging, and death of MNs. Current hiPSC-derived MN-based applications are often hampered by limitations in our ability to monitor MN morphology, survival, and other functional properties over a prolonged timeframe, underscoring the need for improved long-term culture conditions. Here we describe a cytocompatible dendritic polyglycerol amine (dPGA) substrate-based method for prolonged culture of hiPSC-derived MNs. We provide evidence that MNs cultured on dPGA-coated dishes are more amenable to long-term study of cell viability, molecular identity, and spontaneous network electrophysiological activity. The present study has the potential to improve hiPSC-based studies of human MN biology and disease. We describe the use of a new coating substrate providing improved conditions for long-term cultures of human iPSC-derived motor neurons, thus allowing evaluation of cell viability, molecular identity, spontaneous network electrophysiological activity, and single-cell RNA sequencing of mature motor neurons.
Dietary choline deficiency causes DNA strand breaks and alters epigenetic marks on DNA and histones
Creators: name: Zeisel, Steven H.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: Dietary choline is an important modulator of gene expression (via epigenetic marks) and of DNA integrity. Choline was discovered to be an essential nutrient for some humans approximately one decade ago. This requirement is diminished in young women because estrogen drives endogenous synthesis of phosphatidylcholine, from which choline can be derived. Almost half of women have a single nucleotide polymorphism that abrogates estrogen-induction of endogenous synthesis, and these women require dietary choline just as do men. In the US, dietary intake of choline is marginal. Choline deficiency in people is associated with liver and muscle dysfunction and damage, with apoptosis, and with increased DNA strand breaks. Several mechanisms explain these modifications to DNA. Choline deficiency increases leakage of reactive oxygen species from mitochondria consequent to altered mitochondrial membrane composition and enhanced fatty acid oxidation. Choline deficiency impairs folate metabolism, resulting in decreased thymidylate synthesis and increased uracil misincorporation into DNA, with strand breaks resulting during error-prone repair attempts. Choline deficiency alters DNA methylation, which alters gene expression for critical genes involved in DNA mismatch repair, resulting in increased mutation rates. Any dietary deficiency which increases mutation rates should be associated with increased risk of cancers, and this is the case for choline deficiency. In rodent models, diets low in choline and methyl-groups result in spontaneous hepatocarcinomas. In human epidemiological studies, there are interesting data that suggest that this also may be the case for humans, especially those with SNPs that increase the dietary requirement for choline.
Optical spectropolarimetry of binary asteroid Didymos-Dimorphos before and after the DART impact
Creators: name: Bagnulo, S.
name: Gray, Z.
name: Granvik, M.
name: Cellino, A.
name: Kolokolova, L.
name: Muinonen, K.
name: Munoz, O.
name: Opitom, C.
name: Penttila, A.
name: Snodgrass, C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We have monitored the Didymos-Dimorphos binary asteroid in spectropolarimetric mode in the optical range before and after the DART impact. The ultimate goal was to obtain constraints on the characteristics of the ejected dust for modelling purposes. Before impact, Didymos exhibited a linear polarization rapidly increasing with phase angle, reaching a level of about 5% in the blue and about 4.5 in the red. The shape of the polarization spectrum was anti-correlated with that of its reflectance spectrum, which appeared typical of an S-class asteroid. After impact, the level of polarization dropped by about 1 percentage point (pp) in the blue band and about 0.5 pp in the red band, then continued to linearly increase with phase angle, with a slope similar to that measured prior to impact. The polarization spectra, once normalised by their values at an arbitrary wavelength, show very little or no change over the course of all observations, before and after impact. The lack of any remarkable change in the shape of the polarization spectrum after impact suggests that the way in which polarization varies with wavelength depends on the composition of the scattering material, rather than on its structure, be this a surface or a debris cloud.
description: ApJL, in press
Fluorine in the solar neighborhood - is it all produced in AGB-stars?
Creators: name: Jönsson, H.
name: Ryde, N.
name: Harper, G. M.
name: Richter, M. J.
name: Hinkle, K. H.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The origin of 'cosmic' fluorine is uncertain, but there are three proposed production sites/mechanisms: AGB stars, $ν$ nucleosynthesis in Type II supernovae, and/or the winds of Wolf-Rayet stars. The relative importance of these production sites has not been established even for the solar neighborhood, leading to uncertainties in stellar evolution models of these stars as well as uncertainties in the chemical evolution models of stellar populations. We determine the fluorine and oxygen abundances in seven bright, nearby giants with well-determined stellar parameters. We use the 2.3 $μ$m vibrational-rotational HF line and explore a pure rotational HF line at 12.2 $μ$m. The latter has never been used before for an abundance analysis. To be able to do this we have calculated a line list for pure rotational HF lines. We find that the abundances derived from the two diagnostics agree. Our derived abundances are well reproduced by chemical evolution models only including fluorine production in AGB-stars and therefore we draw the conclusion that this might be the main production site of fluorine in the solar neighborhood. Furthermore, we highlight the advantages of using the 12 $μ$m HF lines to determine the possible contribution of the $ν$-process to the fluorine budget at low metallicities where the difference between models including and excluding this process is dramatic.
The formation and biological significance of N7-guanine adducts
Creators: name: Pachkowski, Brian F.
name: Boysen, Gunnar
name: Nakamura, Jun
name: Swenberg, James A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: DNA alkylation or adduct formation occurs at nucleophilic sites in DNA, mainly the N7-position of guanine. Ever since identification of the first N7-guanine adduct, several hundred studies on DNA adducts have been reported. Major issues addressed include the relationships between N7-guanine adducts and exposure, mutagenesis, and other biological endpoints. It became quickly apparent that N7-guanine adducts are frequently formed, but may have minimal biological relevance, since they are chemically unstable and do not participate in Watson Crick base pairing. However, N7-guanine adducts have been shown to be excellent biomarkers for internal exposure to direct acting and metabolically activated carcinogens. Questions arise, however, regarding the biological significance for N7-guanine adducts that are readily formed, do not persist, and are not likely to be mutagenic. Thus, we set out to review the current literature to evaluate their formation and the mechanistic evidence for the involvement of N7-guanine adducts in mutagenesis or other biological processes. It was concluded that there is insufficient evidence that N7-guanine adducts can be used beyond confirmation of exposure to the target tissue and demonstration of the molecular dose. There is little to no evidence that N7-guanine adducts or their depurination product, apurinic sites, are the cause of mutations in cells and tissues, since increases in AP sites have not been shown unless toxicity is extant. However, more research is needed to define the extent of chemical depurination versus removal by DNA repair proteins. Interestingly, N7-guanine adducts are clearly present as endogenous background adducts and the endogenous background amounts appear to increase with age. Furthermore, the N7-guanine adducts have been shown to convert to ring opened lesions (FAPy), which are much more persistent and have higher mutagenic potency. Studies in humans are limited in sample size and differences between controls and study groups are small. Future investigations should involve human studies with larger numbers of individuals and analysis should include the corresponding ring opened FAPy derivatives.
Mouthpart morphology of three calanoid copepods from Australian temporary pools: evidence for carnivory
Creators: name: Green, John D
name: Shiel, Russell J
Publisher: name: La Trobe
Year: 2023

description: La Trobe University Faculty of Science, Technology and Engineering Murray Darling Freshwater Research Centre

MDFRC item.

The mandibles, first and second maxillae, and maxillipeds of Boeckella major, B. pseudochelae, and Hemiboeckella searli from temporary pools of the upper River Murray catchment were dissected off and examined by light microscopy for features associated with carnivorous feeding. In B. major adaptations for carnivory are enlarged ventral mandibular teeth, strong falciform medial setae on the second maxillae, falciform endopodal setae on the maxilliped, large body size and large mouthpart size in relation to body size. Its mandibular edge index is 772, in the upper omnivore range. B. major is predicted to be an omnivore with strong carnivorous tendencies and able to handle large prey items. Carnivorous features in H. searli are enlarged ventral mandibular teeth, a mandibular edge index of 1395, and strong unguiform and falciform setae on the second maxillae. It is predicted to be an omnivore with moderate carnivorous tendencies, but unable to handle prey as large as can B. major. In B. pseudochelae the only adaptations for carnivory are an edge index of 1080 and falciform setae on the maxilliped. It is predicted to be an omnivore with herbivorous tendencies. Examination of gut contents confirmed these predictions. B. major guts contained 19 animal taxa, mainly planktonic cladocerans, copepods and rotifers, H. searli 12 taxa, mainly copepods and rotifers, and B. pseudochelae 8 taxa, mainly rotifers. All had consumed algae. We suggest that predation by B. major may be an important factor affecting community structure in fishless Australian temporary pools.
Measuring myocardial extracellular volume of the right ventricle in patients with congenital heart disease
Creators: name: Al-Wakeel-Marquard, Nadya
name: Ferreira Da Silva, Tiago
name: Jeuthe, Sarah
name: Rastin, Sanaz
name: Muench, Frédéric
name: O H-Ici, Darach
name: Yilmaz, Sevim
name: Berger, Felix
name: Kuehne, Titus
name: Messroghli, Daniel R.
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2021
Subjects: subject: right ventricle
subject: extracellular volume
subject: cardiovascular magnetic resonance
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: The right ventricle ' s (RV) characteristics-thin walls and trabeculation-make it challenging to evaluate extracellular volume (ECV). We aimed to assess the feasibility of RV ECV measurements in congenital heart disease (CHD), and to introduce a novel ECV analysis tool. Patients (n=39) and healthy controls (n=17) underwent cardiovascular magnetic resonance T1 mapping in midventricular short axis (SAX) and transverse orientation (TRANS). Regions of interest (ROIs) were evaluated with regard to image quality and maximum RV wall thickness per ROI in pixels. ECV from plane ROIs was compared with values obtained with a custom-made tool that derives the mean T1 values from a "line of interest" (LOI) centered in the RV wall. In CHD, average image quality was good (no artifacts in the RV, good contrast between blood/myocardium), and RV wall thickness was 1-2 pixels. RV ECV was not quantifiable in 4/39 patients due to insufficient contrast or wall thickness<1 pixel. RV myocardium tended to be more clearly delineated in SAX than TRANS. ECV from ROIs and corresponding LOIs correlated strongly in both directions (SAX/TRANS: r=0.97/0.87, p<0.001, respectively). In conclusion, RV ECV can be assessed if image quality allows sufficient distinction between myocardium and blood, and RV wall thickness per ROI is >= 1 pixel. T1 maps in SAX are recommended for RV ECV analysis. LOI application simplifies RV ECV measurements.
Investigation of a small X-ray flaring event in NLS1 galaxy NGC 4051
Creators: name: Kumari, Neeraj
name: Jana, Arghajit
name: Naik, Sachindra
name: Nandi, Prantik
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We performed a detailed broadband spectral and timing analysis of a small flaring event of ~120 ks in a narrow-line Seyfert 1 galaxy NGC 4051 using simultaneous XMM-Newton and NuSTAR observations. The ~300 ks long NuSTAR observation and the overlapping XMM-Newton exposure were segregated into pre-flare, flare, and post-flare segments. During the flare, the NuSTAR count rate peaked at 2.5 times the mean count rate before the flare. Using various physical and phenomenological models, we examined the 0.3-50 keV X-ray spectrum, which consists of a primary continuum, reprocessed emission, warm absorber and ultra-fast outflows in different timescales. The mass of the central black hole is estimated to be >1.32*10^5 solar mass from the spectral analysis. The absence of correlation between flux in 6-7 keV and 10-50 keV bands suggests different origins of the iron emission line and the Compton hump. From the spectral analysis, we found that the reflection fraction drops significantly during the flare, accompanied by an increase in the coronal height above the disc. The spectrum became soft during the flare supporting the "softer when brighter" nature of the source. After the alleviation of the flare, the coronal height drops and the corona heats up. This indicates that there could be inflation of the corona during the flare. We found no significant change in the inner accretion disc or the seed photon temperature. These results suggest that the flaring event occurred due to the change in the coronal properties rather than any notable change in the accretion disc.
description: 14 pages, 14 figures, Accepted for publication in MNRAS
Homogeneous and inhomogeneous sources of optical transition broadening in room temperature CdSe/ZnS nanocrystal quantum dots
Creators: name: Wolf, M.
name: Berezovsky, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We perform photoluminescence excitation measurements on individual CdSe/ZnS nanocrystal quantum dots (NCQDs) at room temperature to study optical transition energies and broadening. The observed features in the spectra are identified and compared to calculated transition energies using an effective mass model. The observed broadening is attributed to phonon broadening, spectral diffusion and size and shape inhomogeneity. The former two contribute the broadening transitions in individual QDs while the latter contributes to the QD-to-QD variation. We find that phonon broadening is often not the dominant contribution to transition line widths, even at room temperature, and that broadening does not necessarily increase with transition energy. This may be explained by differing magnitude of spectral diffusion for different quantum-confined states.
description: 5 pages, 4 figures