cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Reality and poetic tradition in Lorca's "Llanto por Ignacio Sanchez Mejias"
Creators: name: Collins, Nicholas Jonathan
Publisher: name: University of British Columbia
Year: 2011

description: This thesis studies the elegy that Federico Garcíia Lorca wrote to commemorate the death of his friend Ignacio Sánchez Mejías, fatally gored in mid-August 1934. Because the poem celebrates an historical event attention is first directed to the life of Ignacio and to the details of his fatal injury and its repercussions. Because some of these details have heen incorporated into the poem there follows a commentary on the poem which seeks to explain these references, as well as some of the images and metaphors. Some lines lack a convincing explanation but their obscurity does not hinder to any great extent an overall comprehension of the poem. The second part of the study looks at the history of the Spanish Elegy, tracing its formation and development from the eleventh-century 'Planctus' to the form used by Lorca. It is in the final chapter that Lorca's debt to history and tradition is assessed, at the same time pointing out that the poem, although based on an historical event and drawing from a long tradition of the Elegy, is very much an example of the work of a sophisticated and talented twentieth-century poet.
Evolution of Pangea: paleomagnetic constraints from the Southern Alps, Italy
Creators: name: Muttoni, Giovanni
name: Kent, Dennis V.
name: Channell, James E. T.
Publisher: name: Columbia University
Year: 1996
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences

description: A new early Late Triassic paleopole for Adria has been obtained from the Val Sabbia Sandstone in the Southern Alps. As Early Permian and Jurassic-Cretaceous paleomagnetic data from para-autochthonous regions of Adria such as the Southern Alps are consistent with 'African' APWPs[1–2], paleomagnetic data from this region can be used to bolster the West Gondwana APWP in the poorly known Late Permian-Triassic time interval. The Southern Alpine paleopoles are integrated with the West Gondwana and Laurussia APWPs of Van der Voo [1] and used to generate a tectonic model for the evolution of Pangea. The Early Permian overall mean paleopole for West Gondwana and Adria, in conjunction with the coeval Laurussia paleopole, support Pangea B of Morel and Irving [3]. The Late Permian/Early Triassic and the Middle/Late Triassic paleopoles from Adria and Laurussia support Pangea A-2 of Van der Voo and French [4]. The phase of transcurrent motion between Laurasia and Gondwana[5] that caused the Pangea B to A-2 transition occurred essentially in the Permian (at the end of Variscan orogeny) with an average relative velocity of approximately 10 cm/yr. Finally, the Late Triassic/Early Jurassic paleopoles from West Gondwana and Laurussia agree with Pangea A-1 of Bullard et al. [6], the widely accepted Pangea configuration at the time of the Jurassic breakup.
Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars
Creators: name: van Belle, Gerard T.
name: von Braun, Kaspar
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present interferometric angular sizes for 12 stars with known planetary companions, for comparison with 28 additional main-sequence stars not known to host planets. For all objects we estimate bolometric fluxes and reddenings through spectral energy distribution fits, and in conjunction with the angular sizes, measurements of effective temperature. The angular sizes of these stars are sufficiently small that the fundamental resolution limits of our primary instrument, the Palomar Testbed Interferometer, are investigated at the sub-milliarcsecond level and empirically established based upon known performance limits. We demonstrate that the effective temperature scale as a function of dereddened $(V-K)_0$ color is statistically identical for stars with and without planets. A useful byproduct of this investigation is a direct calibration of the $T_{\rm EFF}$ scale for solar-like stars, as a function of both spectral type and $(V-K)_0$ color, with an precision of $\bar{ΔT}_{\rm {(V-K)}_0} = 138$K over the range $(V-K)_0=0.0-4.0$ and $\bar{ΔT}_{\rm {SpType}} = 105$K for the range F6V -- G5V. Additionally, we provide in an appendix spectral energy distribution fits for the 166 stars with known planets which have sufficient photometry available in the literature for such fits; this derived "{\tt XO-Rad}" database includes homogenous estimates of bolometric flux, reddening, and angular size.
description: Accepted for publication in ApJ
Comments on the Fayet-Iliopoulos Term in Field Theory and Supergravity
Creators: name: Komargodski, Zohar
name: Seiberg, Nathan
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A careful analysis of the Fayet-Iliopoulos (FI) model shows that its energy momentum tensor and supersymmetry current are not gauge invariant. Since the corresponding charges are gauge invariant, the model is consistent. However, our observation about the currents gives a new perspective on its restrictive renormalization group flow and explains why FI-terms never appear in dynamical supersymmetry breaking. This lack of gauge invariance is at the root of the complications of coupling the model to supergravity. We show that this is possible only if the full supergravity theory (including all higher derivative corrections) has an additional exact continuous global symmetry. A consistent quantum gravity theory cannot have such symmetries and hence FI-terms cannot appear. Our results have consequences for various models of particle physics and cosmology.
description: 14 pages. v2: references added and minor changes
Additional file 2 of Circular RNA circPTPRF promotes the progression of GBM via sponging miR-1208 to up-regulate YY1
Creators: name: Zhou, Jiang
name: Wang, Chengbin
name: Liu, Yingliang
name: Cui, Daming
name: Wang, Zhenlin
name: Jiang, Yang
name: Gao, Liang
Publisher: name: figshare
Year: 2022
Subjects: Biophysics
Cell Biology
Molecular Biology
Biological Sciences not elsewhere classified
Developmental Biology
Cancer

description: Supplementary Table S2. Clinical information of the primary glioma stem-like cells.
Deep Learning Frameworks for Multi-omics Analyses of the Microbiome in Disease Studies
Creators: name: Reiman, Derek
Publisher: name: University of Illinois at Chicago
Year: 2022
Subjects: Uncategorized

description: Over the last decade, our understanding of the functions of the microbiome has greatly increased. In particular, the gut microbiome has been shown to play a critical role in the development of multiple metabolic diseases. As such, clinicians have looked to the microbiome community as a diagnostic marker as well as a potential target for therapeutic interventions, either by directly altering the microbiome composition or by targeting underlying metabolic functions. However, the development of these therapies is challenging. It requires the identification of which microbes are associated with the disease, an understanding of the underlying function of these microbes contributing to metabolic dysregulation, and the knowledge of how specific patient characteristics and stimuli can alter the dynamics of the microbiome community. In this dissertation, I will present novel deep learning frameworks that I have developed to address these challenges in microbiome studies. First, I will introduce a deep learning framework that integrates phylogenetic information with microbiome abundance to predict host disease status. I will demonstrate the predictive power of this model using complex disease states across Inflammatory Bowel Disease, Type 2 Diabetes, and other diseases, and show its ability to identify disease-related microbes at different taxonomic levels. Next, I will present an interpretable deep neural network framework integrating microbiome and metabolome data to predict the entire metabolomic profile from microbiome abundance. I will then show this framework can cluster microbes and metabolites into functionally related modules in order to identify underlying microbe-metabolite interactions. Lastly, I will introduce a deep learning framework for modeling the dynamics of the microbiome community while considering multiple patient characteristics and external factors. This framework not only improves the prediction performance compared to current state-of-the-art methods, but also facilitates the identification of host characteristics and factors that have a significant impact on microbiome dynamics. Together, these methods aim to provide a suite of robust and scalable tools to assist researchers in identifying microbes related to disease, uncovering the metabolic function of these microbes, and identifying potential treatment routes for improving patient health through microbiome targeted therapeutics.
Geomagnetic excursions and climate change: Reply to Comment by M. R. Rampino
Creators: name: Kent, Dennis V.
Publisher: name: Columbia University
Year: 1983
Subjects: Paleoclimatology

description: Rampino is correct in stating that, unlike NRM intensity fluctuations observed in some cores, anomalous NRM directions interpreted as geomagnetic excursions are not readily explained by changes in lithology and magnetic mineral content. The question of excursions, particularly their temporal and spatial distribution, can be argued at length (see, for example, ref. 2). Here I will simply illustrate some of the associated problems by considering the record of purported excursions in a single critical core, V20-108, which provides an important basis for several contributions seeking a link between geomagnetism and climate.
title: The Highest Local Density of Reinforcement Controls Overall Post-Reinforcement Pause Duration on Ratio Schedules
Creators: name: Bonem, Elliott J.
Publisher: name: Utah State University
Year: 1988

description: A series of experiments were conducted with pigeons to investigate the variables responsible for differential postreinforcement pause (PRP) durations found on ratio schedules. In Experiment I, behavior on fixed-ratio (FR) and variable-ratio (VR) schedules were compared to behavior evoked by two interpolated schedules. The addition of a single FR 1 component to the FR 50 baseline schedule reduced the overall PRP to a duration comparable to that found on the VR 50 schedule. The addition of both an FR 1 and an FR 215 component to an FR 50 baseline reduced PRP and IRT durations below those on a VR 50 schedule.
Experiments II and III were designed to isolate the conditions under which the smallest ratio component exerts predominant control over PRP duration. The results of Experiment II demonstrated that a local increase in reinforcement density was a necessary, but not sufficient condition for reducing median PRP duration. That is, exposure to a response-independnt increase in reinforcement density attenuated, but did not eliminate the reduction in median PRP duration associated with the interpolated FR 1 component. The results of Experiment III demonstrated that neither random session location of the FR 1 component nor unsignaled presentation of the FR 1 component were necessary conditions for reducing the duration of the PRP. That is, a brief, response-dependent increase in reinforcement density was a sufficient condition for reducing PRP duration given a subject free from historical exposure to response-independent reinforcement.
It was concluded that the difference in PRP duration produced by two, comparably-sized, fixed- and variable-ratio schedules is a function of the size of the smallest ratio component present in the reinforcement schedule. More generally, the highest local density of reinforcement controls the overall duration of the PRP on a response-dependent, ratio schedule.
Quantum Black Hole in the Generalized Uncertainty Principle Framework
Creators: name: Bina, A.
name: Jalalzadeh, S.
name: Moslehi, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we study the effects of the Generalized Uncertainty Principle (GUP) on canonical quantum gravity of black holes. Through the use of modified partition function that involves the effects of the GUP, we obtain the thermodynamical properties of the Schwarzschild black hole. We also calculate the Hawking temperature and entropy for the modification of the Schwarzschild black hole in the presence of the GUP.
description: 11 pages, no figures, to appear in Physical Review D
Additional file 1 of A cross-sectional survey on the lung ultrasound training and practice of respiratory therapists in mainland China
Creators: name: Liu, Kai
name: Yao, Yu-long
name: Wang, Yu-xian
name: Wei, Bi-lin
name: Li, Liu-cun
name: Wang, Qi-xing
name: Ge, Hui-qing
name: Wang, Er-shan
name: Yang, Li-min
name: Chen, Huan
name: Yang, Yun-qing
name: Qin, Hao
name: Zhai, Wen-jun
name: Yu, Shen-ji
name: Wang, Xiao-ting
name: Luo, Zhe
name: Tu, Guo-wei
Publisher: name: figshare
Year: 2022
Subjects: Medicine
Environmental Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Science Policy
Mental Health

description: Additional file 1.
Statistical structure of geomagnetic reversals
Creators: name: Kent, Dennis V.
Publisher: name: Columbia University
Year: 1985
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Reversals of the Earth's magnetic field have not occurred at a constant average rate over the past 170 Myr. Shifts in the mean reversal rate at various times appear to be separated by periods of tens of millions of years in which the average rate of reversals remains nearly constant. Conclusions drawn from these and other statistical properties of reversal processes have been based on analyses of early versions of the geomagnetic polarity timescale (OPTS). More recent versions of the OPTS for the past 170 Myr incorporate a variety of new data from marine magnetic anomalies, magneto-biostrategraphic correlations and improved age calibrations, resulting in a new picture of the reversal behavior of geomagnetic fields.
Falsifying Paradigms for Cosmic Acceleration
Creators: name: Mortonson, Michael J.
name: Hu, Wayne
name: Huterer, Dragan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Consistency relations between growth of structure and expansion history observables exist for any physical explanation of cosmic acceleration, be it a cosmological constant, scalar field quintessence, or a general component of dark energy that is smooth relative to dark matter on small scales. The high-quality supernova sample anticipated from an experiment like SNAP and CMB data expected from Planck thus make strong predictions for growth and expansion observables that additional observations can test and potentially falsify. We perform an MCMC likelihood exploration of the strength of these consistency relations based on a complete parametrization of dark energy behavior by principal components. For LCDM, future SN and CMB data make percent level predictions for growth and expansion observables. For quintessence, many of the predictions are still at a level of a few percent with most of the additional freedom coming from curvature and early dark energy. While such freedom is limited for quintessence where phantom equations of state are forbidden, it is larger in the smooth dark energy class. Nevertheless, even in this general class predictions relating growth measurements at different redshifts remain robust, although predictions for the instantaneous growth rate do not. Finally, if observations falsify the whole smooth dark energy class, new paradigms for cosmic acceleration such as modified gravity or interacting dark matter and dark energy would be required.
description: 29 pages, 25 color figures; submitted to Phys. Rev. D
Modeling the effects of dust evolution on the SEDs of galaxies of different morphological type
Creators: name: Schurer, A.
name: Calura, F.
name: Silva, L.
name: Pipino, A.
name: Granato, G. L.
name: Matteucci, F.
name: Maiolino, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present photometric evolution models of galaxies, in which, in addition to the stellar component, the effects of an evolving dusty interstellar medium have been included with particular care. Starting from the work of Calura, Pipino & Matteucci (2008), in which chemical evolution models have been used to study the evolution of both the gas and dust components of the interstellar medium in the solar neighbourhood, elliptical and irregular galaxies, it has been possible to combine these models with a spectrophotometric stellar code that includes dust reprocessing (GRASIL) (Silva et al. 1998) to analyse the evolution of the spectral energy distributions (SED) of these galaxies. We test our models against observed SEDs both in the local universe and at high redshift and use them to predict how the percentage of reprocessed starlight evolves for each type of galaxy. The importance of following the dust evolution is investigated by comparing our results with those obtained by adopting simple assumptions to treat this component.
description: 25 pages, 25 figures. Accepted for publication in MNRAS
Spin dynamics and structure formation in a spin-1 condensate in a magnetic field
Creators: name: Mur-Petit, Jordi
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the dynamics of a trapped spin-1 condensate in a magnetic field. First, we analyze the homogeneous system, for which the dynamics can be understood in terms of orbits in phase space. We analytically solve for the dynamical evolution of the populations of the various Zeeman components of the homogeneous system. This result is then applied via a local density approximation to trapped quasi-1D condensates. Our analysis of the trapped system in a magnetic field shows that both the mean-field and Zeeman regimes are simultaneously realized, and we argue that the border between these two regions is where spin domains and phase defects are generated. We propose a method to experimentally tune the position of this border.
description: 8 pages, 5 figures. Matches published version
Spin Sum Rules at Low $Q^2$
Creators: name: Chen, Jian-ping
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Recent precision spin-structure data from Jefferson Lab have significantly advanced our knowledge of nucleon structure at low $Q^2$. Results on the neutron spin sum rules and polarizabilities in the low to intermediate $Q^2$ region are presented. The Burkhardt-Cuttingham Sum Rule was verified within experimental uncertainties. When comparing with theoretical calculations, results on spin polarizability show surprising disagreements with Chiral Perturbation Theory predictions. Preliminary results on first moments at very low $Q^2$ are also presented.
description: 4 pages, to be published in the Proceedings of the 10th Conference on Intersections of Nuclear and Particle Physics (CIPANP)
On the time dependent axial shortening of tall concrete buildings with framing action
Creators: name: Gardner, Mark
Publisher: name: University Of Tasmania
Year: 2023

description: Long term axial shortening in a tall concrete structure is a second-order effect that is of some impediment to the serviceability, and in some cases, structural integrity of the building. The research here involves analysis of axial shortening elements that interact through framing action. In many tall concrete buildings framing is inherent as columns, beams and floors are quite often connected with rigid connections. The mechanics of differential axial shortening and framing action due to rigid connections causes load sharing between vertical elements that fundamentally affects the degree of both absolute and differential axial shortening. Evaluation of axial shortening by analysis of a structural system consisting of discrete elements over-predicts the level of axial shortening when framing is present. A methodology to calculate axial shortening, accounting for load sharing of axial loads for tall concrete buildings, is developed. The application of this methodology to the construction of a tall concrete building allowing for the building cycle is presented. A program is written that incorporates both the methodology and its application to a tall building, using the ACT concrete creep and shrinkage models. Correlation of the program is made against an existing previously tested program that does not allow for framing action. A comparison is made between the two sets of data for an actual 85 storey building. From this it is concluded that; i) Framing action reduces the differential axial shortening between two elements ii) The core generally experiences less change to axial shortening than columns iii) The effect of framing cannot be estimated by a relative percentage adjustment applied uniformly to each storey.
Mechanisms of Tropical Atlantic SST Influence on North American Precipitation Variability
Creators: name: Kushnir, Yochanan
name: Seager, Richard
name: Ting, Mingfang
name: Naik, Naomi H.
name: Nakamura, Jennifer A.
Publisher: name: Columbia University
Year: 2009
Subjects: Climatology
Hydrology
Precipitation variability
Ocean temperature

description: The dynamical mechanisms associated with the impact of year-to-year variability in tropical North Atlantic (TNA) sea surface temperatures (SSTs) on North American precipitation, during the cold and warm halves of the hydrological year (October–September) are examined. Observations indicate that during both seasons warmer-than-normal TNA SSTs are associated with a reduction of precipitation over North America, mainly west of 90°W, and that the effect can be up to 30% of the year-to-year seasonal precipitation RMS variability. This finding confirms earlier studies with observations and models. During the cold season (October–March) the North American precipitation variability associated with TNA fluctuations is considerably weaker than its association with ENSO. During the warm season (April–September), however, the Atlantic influence, per one standard deviation of SST anomalies, is larger than that of ENSO. The observed association between TNA SST anomalies and global and North American precipitation and sea level pressure variability is compared with that found in the output of an atmospheric general circulation model (AGCM) forced with observed SST variability, both globally and in the tropical Atlantic alone. The similarity between model output and observations suggests that TNA SST variability is causal. The mechanisms of the “upstream” influence of the Atlantic on North American precipitation are seasonally dependent. In the warm season, warmer-than-normal TNA SSTs induce a local increase in atmospheric convection. This leads to a weakening of the North Atlantic subtropical anticyclone and a reduction in precipitation over the United States and northern Mexico, associated with the anomalous southward flow there. In the cold season, a response similar to the warm season over the subtropical Atlantic is identified, but there is also a concomitant suppression of convection over the equatorial Pacific, which leads to a weakening of the Aleutian low and subsidence over western North America, similar to the impact of La Niña although weaker in amplitude. The impact of TNA SST on tropical convection and the extratropical circulation is examined by a set of idealized experiments with a linear general circulation model forced with the tropical heating field derived from the full AGCM.
Introduction of thermal activation in forward modeling of hysteresis loops for single-domain magnetic particles and implications for the interpretation of the Day diagram
Creators: name: Lanci, Luca
name: Kent, Dennis V.
Publisher: name: Columbia University
Year: 2003
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences

description: Synthetic hysteresis loops were generated by numerically solving the classical Stoner-Wohlfarth model and a thermally activated Stoner-Wohlfarth model for a set of randomly oriented magnetic grains. Although computationally intensive this method allows forward modeling of hysteresis loops of single-domain (SD) and viscous grains. In the classic Stoner-Wohlfarth model the shape of the modeled loops can be modified by changing the distribution of the anisotropy energy but all the loops will all have similar hysteresis parameters Msr/Ms and Hcr/Hc corresponding to that of a theoretical assemblage of SD particles. The thermally activated Stoner-Wohlfarth model, which allows the magnetic moment of each grain to switch between two energy minima according to Boltzmann statistics, extends the SD model toward superparamagnetic (SP) grains and introduces a volume dependency. Numerical simulation using the thermally activated model shows that the shapes of SD loops are modified by the effect of the thermal energy if the particles are sufficiently small. The major effect of the thermal disturbance is observed in highly viscous particles (smaller than approximately 0.03 μm in diameter, for magnetite) where it strongly reduces the coercivity and to a lesser extent the remanent magnetization. The effect on the hysteresis parameters is a large increase in Hcr/Hc and a decrease in Msr/Ms, by factors that vary with anisotropy distribution, grain volume and measurement time. For certain grain sizes, these result in hysteresis parameters that are similar to those attributed to pseudosingle-domain (PSD) grains.
Variability in emotion regulation strategy use is negatively associated with depressive symptoms
Creators: name: Wang, Xiaoqin
name: Blain, Scott D.
name: Meng, Jie
name: Liu, Yuan
name: Qiu, Jiang
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Mental Health

description: Variability in the emotion regulation (ER) strategies one uses throughout daily life has been suggested to reflect adaptive ER ability and to act as a protective factor in mental health. Moreover, psychological inflexibility and persistent negative affect (or affective inertia) are key features of depression and other forms of mental illness and are often further exacerbated by rigid or overly passive regulatory behaviours. The current study investigated the hypothesis that ER variability might serve as a protective factor against depressive symptoms and affective inertia. Using experience-sampling (N = 213), we tested whether two indictors of ER variability (between- and within-strategy SDs) were related to depressive symptoms and affective inertia. We found that people with higher between-strategy variability and within-strategy variability (specifically for reappraisal and distraction) reported fewer depressive symptoms. Both within- and between-strategy variability were negatively related to negative affective inertia. Between-strategy variability and negative affective inertia had unique effects on depression, when used as simultaneous predictors. Altogether, this study provides further evidence for the utility of ER as a factor buffering against depressive symptoms and particularly for the use of variable ER strategies.
Miocene magnetostratigraphy from Equatorial Pacific sediments (ODP Site 1218, Leg 199)
Creators: name: Lanci, Luca
name: Pares, Josep M.
name: Channell, James E. T.
name: Kent, Dennis V.
Publisher: name: Columbia University
Year: 2004
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences

description: Pliocene and Miocene magnetostratigraphy from ODP Site 1218 (Equatorial Pacific) has been obtained by measurements made on u-channel samples, augmented by about 50 discrete samples. U-channel samples were measured at 1 cm intervals and stepwise demagnetized in alternating fields up to a maximum peak field of 80 mT. The component magnetization directions were determined by principal component analysis for demagnetization steps in the 20–60 mT peak field range. A relatively small number of discrete samples were subject to both thermal and alternating field (AF) demagnetization and gave results compatible with u-channel measurements. Magnetostratigraphy from u-channel samples are compared with shipboard data that were based on blanket demagnetization at peak AF fields of 20 mT. U-channel measurements add more detail to the magnetostratigraphic record and allow identification of thin polarity zones especially in the upper part of the section were the sedimentation rates are very low (∼2 m/Myr). The component magnetization directions determined from u-channel measurements also gave more reliable and precise estimates of inclination (paleolatitude). The magnetostratigraphy from Site 1218 can be unambiguously correlated with the reference geomagnetic polarity time scale and gives a means of dating the sedimentary sequence. Both Miocene–Pliocene and Oligocene–Miocene stage boundaries were easily identified from the magnetostratigraphic record. Although calculation of paleomagnetic poles is hindered by the low precision of the cores' azimuthal orientation, the data from both u-channel and discrete samples allow determination of the paleolatitude of the Site through time with good precision. Paleomagnetic data indicate that the paleolatitude of Site 1218 has increased form nearly equatorial latitude in the Oligocene to its present-day latitude close to 9°N. Within the precision of the paleomagnetic data, this is in agreement with current predictions of plate motion models based on fixed hotspots.
A multi-objective optimization of FCL and DOCR settings to mitigate distributed generations impacts on distribution networks
Creators: name: Usama, Muhammad
name: Mokhlis, Hazlie
name: Moghavvemi, M
name: Nadzirah Mansor, Nurulafiqah
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 400803
subject: Electrical energy generation (incl. renewables, excl. photovoltaics)
classificationCode: 400805
subject: Electrical energy transmission, networks and systems
classificationCode: 400899
subject: Electrical engineering not elsewhere classified

description: Despite providing increased reliability and power quality in meeting the load demand, the integration of DGs has imposed challenges on the protection system. High penetration of DGs changes the overall network impedance and increases the fault current level in the network. Consequently, some buses are exposed to critical conditions, violate the circuit breakers (CB) handling capacity, and affect the existing relay coordination settings. To mitigate these adverse impacts, fault current limiters (FCL) can be a potential solution to minimize the short circuit current within permissible switch-gear-rated limits. Due to its expensive cost, it is crucial to ensure the optimal FCL placement and sizing, and at the same time maintain the effectiveness of the protection performance during various network operation states. This research formulates FCL and directional overcurrent relay (DOCR) settings as a combined protection coordination scheme optimized by a multi-objective hybrid optimization technique. The proposed formulation aims to determine the minimal FCL sizing with minimum investment cost to satisfy the relay coordination constraints at high fault-level buses, irrespective of DG locations and network operating state. User-defined relay characteristics (UDC) are employed to intensify the DOCR coordination performance and obtain minimum operating time, where the conventional inverse relay constants (A&B) are optimized with (TSM & Ipu). The combined UDC relay settings and FCL problem formulation solution attained by MO-hybrid optimization can lessen the escalated electromagnetic stresses, costly switchgear replacement, and relay maloperation. The performance of the proposed technique is assessed by implementing it on the radial (IEEE-33 Bus) and meshed (IEEE 30-Bus) DNs with optimized FCL sizing and relay settings. The optimal results demonstrate the effectiveness of the proposed technique in maintaining the relay coordination performance in the presence of DGs and FCL under an ON/OFF grid connection.
The Large Scale Curvature of Networks
Creators: name: Narayan, Onuttom
name: Saniee, Iraj
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Understanding key structural properties of large scale networks are crucial for analyzing and optimizing their performance, and improving their reliability and security. Here we show that these networks possess a previously unnoticed feature, global curvature, which we argue has a major impact on core congestion: the load at the core of a network with N nodes scales as N^2 as compared to N^1.5 for a flat network. We substantiate this claim through analysis of a collection of real data networks across the globe as measured and documented by previous researchers.
description: 4 pages, 5 figures
Performance analysis & traffic modelling in broadband integrated services digital networks
Creators: name: Habibi, D
Publisher: name: University Of Tasmania
Year: 2023

description: Broadband Integrated Services Digital Networks (B-ISDN) will provide the ability to support a wide range of services using Asynchronous Transfer Mode (ATM) as the transfer technique. While ATM provides the flexibility to integrate a large number of services economically, the challenge to teletraffic engineers is to ensure that an acceptable grade of service is provided for each type of traffic. Research in network performance and traffic modelling is required to develop network operating strategies which will meet these goals. This thesis is mainly concerned with performance analysis models for B-ISDN. In performance modelling of access nodes, several strategies are studied for mixing loss-sensitive traffic with delay-sensitive traffic in both TDM and ATM environments. The performance of these strategies are analysed by different methods. Next, the problem of statistical multiplexing of interactive data, interactive images and variable bit rate (VBR) video traffic in an ATM access node is considered. In this situation, the effect of link rate to source rate ratio and also the effect of priority encoding of the VBR video on the performance of the ATM access node are studied. Next, a strategy is proposed for statistically multiplexing a range of constant bit rate services with an aggregate of variable bit rate services at an ATM access node. Performance parameters for both service types are evaluated by analysis and also by simulation. Accurate source models are an essential component of any access node problem. The traffic generated from video services will greatly influence the overall performance and data requirements in B-ISDN, and the next area considered in this thesis is modelling of video traffic. Several video models in the literature are reviewed and a few models based on the concept of hidden Markov models are examined for modelling variable bit rate video traffic. Network performance based on these models is investigated. Another area that is covered in this thesis is performance modelling for those parts of the network that are subject to traffic with periodically varying rates. A computational probability analysis is presented for queues with cyclo-stationary arrivals and/or cyclo-stationary service rates. Such traffic patterns may arise in a variety of telecommunication and computer networks, including B-ISDN.
YURIDIK XIZMAT KO`RSATISH MARKAZLARI: TADRIJIY RIVOJLANISH VA DASTLABKI YUTUQLAR
Creators: name: Abdullayeva, Sitorabonu
Publisher: name: Zenodo
Year: 2023

description: Maqolada mamlakatimizda yuridik xizmat ko‘rsatish tizimini markazlashtirish borasida amalga oshirilgan islohotlar tadrijiy ravishda sanab o‘tilgan. Shuningdek, yuridik xizmat ko‘rsatish markazlarining huquqiy maqomi, ular faoliyatida erishilgan natijalar tahlil qilingan.
Testing models of the Tertiary paleomagnetic field
Creators: name: Schneider, David A.
name: Kent, Dennis V.
Publisher: name: Columbia University
Year: 1990
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences

description: We examine selected paleomagnetic data of Tertiary age in order to assess previously suggested models of the non-dipole portion of the paleomagnetic field. Data from three localities on the African plate (from DSDP Leg 73, ODP Leg 115 and from Gubbio) indicate that the axial octupole contribution was near zero in the Paleocene and was likely no greater than 5–6% of the axial dipole in the Oligocene. Additional data from North America, which can be linked to Africa using well-known relative plate motion parameters, suggest that a positive axial quadrupole field has been present throughout the Tertiary. To investigate some of the practical consequences of these estimates, we apply a non-dipole field model (3 to 4% g20/g10, 0% g30/g10) to paleomagnetic data from two ODP sites on the African plate (Sites 710, 711) and from the Deccan Traps. We show that paleomagnetic directions from these deep-sea sediments and from this flood basalt province appear consistent with a fixed hotspot model, suggesting in particular that there has been little or no Cenozoic drift of the Réunion hotspot.
Star formation in Perseus - V. Outflows detected by HARP
Creators: name: Hatchell, Jennifer
name: Dunham, Michael M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Molecular outflows provide an alternative method of identifying protostellar cores, complementary to recent mid-infrared studies. Continuing our studies of Perseus, we investigate whether all Spitzer-identified protostars, and particularly those with low luminosities, drive outflows, and if any new protostellar cores (perhaps harbouring low-mass sources) can be identified via their outflows alone. We have used the heterodyne array receiver HARP on JCMT to make deep 12CO 3-2 maps of submm cores in Perseus, extending and deepening our earlier study with RxB and bringing the total number of SCUBA cores studied up to 83. Our survey includes 23/25 of the Dunham et al. (2008) Spitzer low-luminosity objects believed to be embedded protostars, including three VeLLOs. All but one of the cores identified as harbouring embedded YSOs have outflows, confirming outflow detections as a good method for identifying protostars. We detect outflows from 20 Spitzer low-luminosity objects. We do not conclusively detect any outflows from IR-quiet cores, though confusion in clustered regions such as NGC1333 makes it impossible to identify all the individual driving sources. This similarity in detection rates despite the difference in search methods and detection limits suggests either that the sample of protostars in Perseus is now complete, or that the existence of an outflow contributes to the Spitzer detectability, perhaps through the contribution of shocked H2 emission in the IRAC bands. For five of the low-luminosity sources, there is no protostellar envelope detected at 350 microns and the Spitzer emission is entirely due to shocks. Additionally, we detect the outflow from IRAS 03282+3035 at 850 microns with SCUBA due to CO line contamination in the continuum passband.
description: 25 pages, 12 figures, to be published in A&A
Atom detection in a two-mode optical cavity with intermediate coupling: Autocorrelation studies
Creators: name: Norris, D. G.
name: Cahoon, E. J.
name: Orozco, L. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We use an optical cavity in the regime of intermediate coupling between atom and cavity mode to detect single moving atoms. Degenerate polarization modes allow excitation of the atoms in one mode and collection of spontaneous emission in the other, while keeping separate the two sources of light; we obtain a higher confidence and efficiency of detection by adding cavity-enhanced Faraday rotation. Both methods greatly benefit from coincidence detection of photons, attaining fidelities in excess of 99% in less than 1 microsecond. Detailed studies of the second-order intensity autocorrelation function of light from the signal mode reveal evidence of antibunched photon emissions and the dynamics of single-atom transits.
description: 10 pages, 10 figures, to be published in Phys. Rev. A
Studies on some digenetic trematodes from Tasmanian fishes.
Creators: name: Crowcroft, Peter William
Publisher: name: University Of Tasmania
Year: 2023

description: The worms are slender, elongate, and ....somewhat flattened dorsoventrally. The dimensions of fifteen \in toto\" mounts are 1.55-2.36 mm. long. and 0.26-0.24 mm. broad but living specimens are narrower and one and a.half times as long as fixed specimens. The body is broadest at its middle length and tapers towards the extremities (Fig.1). It is narrowest immediately behind the crown of the rhynchus. The latter is hemispherical and bears two papillae anteriorly (Piga). (These papillae do not represent contracted tentacles as is the case in some members of the Bucephalidaes as they are seen only when the animal is extended and are not noticeable in fixed specimens). The rhynchus is notable in that it is armed with a single circlet of spindle-shaped spines which are eighteen in number and measure 0.44 mm. long and 0.012 mm. in diameter. The circlet is interrupted in the mid-ventral line (Figs. 1-2). The body is covered hy'a thick cuticle with minute spinules 0.012 mm. long closely arranged in transverse rows. The rhynchus is free from these spinules except within the ventral break in the circlet of spines. The mouth is situated on the ventral surface at about the middle length of the body when contracted but at the junction of the second and last thirds of the body when extended. The genital aperture is in the mid-ventral line a short distance in front of the posterior extremity.. The excretory pore is a median transverse slit at the posterior end of the body."
Direct measurements of CO2 flux in the Greenland Sea
Creators: name: Lauvset, Siv K.
name: McGillis, Wade R.
name: Bariteau, Ludovic
name: Fairall, C. W.
name: Johannessen, Truls
name: Olsen, Are
name: Zappa, Christopher J.
Publisher: name: Columbia University
Year: 2011
Subjects: subject: Oceanography
subject: FOS: Earth and related environmental sciences

description: During summer 2006 eddy correlation CO2 fluxes were measured in the Greenland Sea using a novel system set-up with two shrouded LICOR-7500 detectors. One detector was used exclusively to determine, and allow the removal of, the bias on CO2 fluxes due to sensor motion. A recently published correction method for the CO2-H2O cross-correlation was applied to the data set. We show that even with shrouded sensors the data require significant correction due to this cross-correlation. This correction adjusts the average CO2 flux by an order of magnitude from -6.7 x 10⁻² mol m⁻² day⁻¹ to -0.61 x 10⁻² mol m⁻² day⁻¹, making the corrected fluxes comparable to those calculated using established parameterizations for transfer velocity.
Observation of vortex nucleation in a rotating two-dimensional lattice of Bose-Einstein condensates
Creators: name: Williams, R. A.
name: Al-Assam, S.
name: Foot, C. J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We report the observation of vortex nucleation in a rotating optical lattice. A 87Rb Bose-Einstein condensate was loaded into a static two-dimensional lattice and the rotation frequency of the lattice was then increased from zero. We studied how vortex nucleation depended on optical lattice depth and rotation frequency. For deep lattices above the chemical potential of the condensate we observed a linear dependence of the number of vortices created with the rotation frequency,even below the thermodynamic critical frequency required for vortex nucleation. At these lattice depths the system formed an array of Josephson-coupled condensates. The effective magnetic field produced by rotation introduced characteristic relative phases between neighbouring condensates, such that vortices were observed upon ramping down the lattice depth and recombining the condensates.
description: 4 pages, 4 figures, accepted for publication in Phys. Rev. Lett
The time-averaged paleomagnetic field
Creators: name: Schneider, David A.
name: Kent, Dennis V.
Publisher: name: Columbia University
Year: 1990
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences

description: We review indications of persistent deviations from the geocentric axial dipole model of the time-averaged geomagnetic field and present a zonal harmonic model derived from 185 deep-sea sediment piston cores taken from low to middle latitudes (to approximately ±45°). Analysis of the paleomagnetic inclination recorded in these cores for the Brunhes (normal polarity; 0-73 Ma) and Matuyama (reverse polarity; 0.73-2.47 Ma) chrons, after plate motion correction, gives well-constrained estimates of the dominant long-term nondipole contributions (the axial quadrupole and axial octupole) and shows no significant deviation from axial symmetry. The amplitude of the axial quadrupole is found to vary with polarity (2.6% of the geocentric axial dipole for normal; 4.6% for reverse), while the axial octupole does not show appreciable change (-2.9% for normal; -2.1% for reverse). These estimates of the quadrupole contribution agree well with prior determinations for the Plio-Pleistocene (0-5 Ma); however, the octupole contribution we find is opposite in sign to previous estimates. We suggest that a negative octupole is representative of the actual time-averaged paleomagnetic field, while prior positive octupole estimates probably reflect spurious inclination shallowing. The lack of polarity asymmetry in the octupole suggests that this nondipole component may be more closely linked to the main dipole field than is the quadrupole and so supports models of the geodynamo in which dipole and quadrupole families do not interact.
Stellar Populations in Barred Galaxies
Creators: name: Robert, C.
name: Cantin, S.
name: Mollá, M.
name: Pellerin, A.
name: Brière, É.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We developed an iterative technique to better characterize stellar populations and the central activity of barred galaxies using evolutionary synthesis codes and OASIS data. The case of NGC5430 is presented here. Our results are reinforcing the role played by the bar and nuclear structures for the evolution of galaxies.
description: 2 pages, 1 figure, to be published in the proceedings of IAU Symp. 262 "Stellar Populations - Planing for the Next Decate" (Aug. 2009)