cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Using virtual parts to optimize the metrology process
Creators: name: Wolff, Valéry
name: Dinh, Tin Tran
name: Raynaud, Stephane
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: In the measurement process, there are many parameters affecting the measurement results: the influence of the probe system, material stiffness of measured workpiece, the calibration of the probe with a reference sphere, the thermal effects. We want to obtain the limits of a measurement methodology to be able to validate a result. The study is applied to a simple part. We observe the dispersion of the position of different drilled holes (XYZ values in a coordinate system) when we change the quality of the part and the method of calculation. We use the Design of Experiment (Taguchi method) to realize our study. We study the influence of the part quality on a measurement results. We consider two parameters to define the part quality (flatness and perpendicularity). We will also study the influence of different methods of calculation to determine the coordinate system. We can use two options in Metrolog XG software (tangent plane with or without orientation constraint). The originality of this paper is that we present a method for the design of experiment that uses CATIA (CAD system) to generate the measured parts. In this way we can realize a design of experiment with a largest number of experimental results. This is a positive point for a statistical analysis. We are also free to define the parts we want to study without manufacturing difficulties.
Climate stability during the Pliocene warm period
Creators: name: Draut, Amy E.
name: Raymo, Maureen E.
name: McManus, Jerry F.
name: Oppo, Delia W.
Publisher: name: Columbia University
Year: 2003
Subjects: Pliocene Geologic Epoch
Climatic changes
Chemical oceanography--Research
Submarine geology
Hydrology
Paleoclimatology

description: We present a high-resolution climate record from a sediment core spanning an 80-kyr interval of time during the mid-Pliocene epoch, when warmer conditions and lower global ice volume prevailed worldwide. Oxygen and carbon isotope analyses were made on benthic and planktonic foraminifera from ODP Site 981 in the North Atlantic. The amplitude and approximate recurrence interval of suborbital variations in these records are comparable to those of Holocene and marine isotope stage 11 (MIS 11) records from the North Atlantic. We conclude that the mid-Pliocene warm interval was a time of relative climatic stability. These results suggest that warmer climatic conditions alone may not necessarily enhance variability in the climate system, a finding that may facilitate predictions of 21st century climatic response to anthropogenic warming.
Reply to comment by S. Peacock on “Glacial-interglacial circulation changes inferred from 231Pa/230Th sedimentary record in the North Atlantic region”
Creators: name: Gherardi, J. -M.
name: Luo, Y.
name: Francois, R.
name: McManus, Jerry F.
name: Allen, S. E.
name: Labeyrie, L.
Publisher: name: Columbia University
Year: 2010
Subjects: Ocean circulation--Research
Paleoceanography
Marine sediments--Analysis
Chemical oceanography
Hydrology
Submarine geology

description: Peacock [2010, P10 hereafter] takes issue with several aspects of our recent article [Gherardi et al., 2009, G09hereafter]: (1) our description of the modern Atlantic meridional overturning circulation (AMOC), (2) apparent inconsistencies between modern circulation and our Holo-cene sedimentary 231Pa/230Th bathymetric profile, and (3) our use of cores for reconstructing AMOC from locations that do not lie beneath the Deep Western Boundary Current (DWBC). We welcome the comment as it affords us the opportunity to clarify important aspects of our approach to studying paleocirculation and to address any potential mis-understandings arising from the wording of our original text.
Ocean climate variability in the eastern North Atlantic during interglacial marine isotope stage 11: A partial analogue to the Holocene?
Creators: name: De Abreu, Lúcia
name: Abrantes, Fátima F.
name: Shackleton, Nicholas J.
name: Tzedakis, Polychronis C.
name: McManus, Jerry F.
name: Oppo, Delia W.
name: Hall, Michael A.
Publisher: name: Columbia University
Year: 2005
Subjects: Ocean temperature
Holocene Geologic Period
Submarine geology
Hydrology
Paleoclimatology

description: Similar orbital geometry and greenhouse gas concentrations during marine isotope stage 11 (MIS 11) and the Holocene make stage 11 perhaps the best geological analogue period for the natural development of the present interglacial climate. Results of a detailed study of core MD01-2443 from the Iberian margin suggest that sea surface conditions during stage 11 were not significantly different from those observed during the elapsed portion of the Holocene. Peak interglacial conditions during stage 11 lasted nearly 18 kyr, indicating a Holocene unperturbed by human activity might last an additional 6–7 kyr. A comparison of sea surface temperatures (SST) derived from planktonic foraminifera for all interglacial intervals of the last million years reveals that warm temperatures during peak interglacials MIS 1, 5e, and 11 were higher on the Iberian margin than during substage 7e and most of 9e. The SST results are supported by heavier δ18O values, particularly during 7e, indicating colder SSTs and a larger residual ice volume. Benthic δ13C results provide evidence of a strong influence of North Atlantic Deep Water at greater depths than present during MIS 11. The progressive ocean climate deterioration into the following glaciation is associated with an increase in local upwelling intensity, interspersed by periodic cold episodes due to ice-rafting events occurring in the North Atlantic.
Sparsistency and agnostic inference in sparse PCA
Creators: name: Lei, Jing
name: Vu, Vincent Q.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistics Theory (math.ST)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: The presence of a sparse "truth" has been a constant assumption in the theoretical analysis of sparse PCA and is often implicit in its methodological development. This naturally raises questions about the properties of sparse PCA methods and how they depend on the assumption of sparsity. Under what conditions can the relevant variables be selected consistently if the truth is assumed to be sparse? What can be said about the results of sparse PCA without assuming a sparse and unique truth? We answer these questions by investigating the properties of the recently proposed Fantope projection and selection (FPS) method in the high-dimensional setting. Our results provide general sufficient conditions for sparsistency of the FPS estimator. These conditions are weak and can hold in situations where other estimators are known to fail. On the other hand, without assuming sparsity or identifiability, we show that FPS provides a sparse, linear dimension-reducing transformation that is close to the best possible in terms of maximizing the predictive covariance.
description: Published in at http://dx.doi.org/10.1214/14-AOS1273 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Magnetic field generation in galactic molecular clouds
Creators: name: Istomin, Ya. N.
name: Kiselev, A. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the magnetic field which is generated by turbulent motions of a weakly ionized gas. Galactic molecular clouds give us an example of such a medium. As in the Kazantsev-Kraichnan model we assume a medium to be homogeneous and a neutral gas velocity field to be isotropic and delta-correlated in time. We take into consideration the presence of a mean magnetic field, which defines a preferred direction in space and eliminates isotropy of magnetic field correlators. Evolution equations for the anisotropic correlation function are derived. Isotropic cases with zero mean magnetic field as well as with small mean magnetic field are investigated. It is shown that stationary bounded solutions exist only in the presence of the mean magnetic field for the Kolmogorov neutral gas turbulence. The dependence of the magnetic field fluctuations amplitude on the mean field is calculated. The stationary anisotropic solution for the magnetic turbulence is also obtained for large values of the mean magnetic field.
description: 11 pages, 8 figures
Microgale dobsoni Thomas 1884
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Insectivora
Tenrecidae
Microgale
Microgale dobsoni

description: Microgale dobsoni Thomas, 1884. Ann. Mag. Nat. Hist., 14: 337. TYPE LOCALITY: Madagascar, C. Betsileo, Nandesen Forest. DISTRIBUTION: C. Madagascar, central part of E. escarpment of C. Plateau, and Manohilaky, west of Ambatandrazaka. COMMENT: Formerly included in Nesogale; see Heim de Balsac, 1972. ISIS NUMBER: 5301403002008005001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Insectivora, pp. 58-106 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 60, DOI: 10.5281/zenodo.7353001
description: {"references": ["Heim de Balsac, H. 1972. Insectivores. Pp. 629 - 660, in Biogeography and ecology in Madagascar (R. Battistini, and G. Richard-Vindard, eds.). W. Junk, The Hague, 765 pp."]}
Dødsårsagsregistret (MGR), 1943-1968
Creators: Rigsarkivet
Publisher: name: Rigsarkivet
Year: 2023

description: Formålet med dette studie er at etablere et standardiseret register over døde i perioden 1943-1968. Registret er dannet ved at lægge de årsopdelte dødsårsagsregistre sammen og standardisere variablerne.
Dynamics of the scenery flow and geometry of measures
Creators: name: Käenmäki, Antti
name: Sahlsten, Tuomas
name: Shmerkin, Pablo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: Primary 28A80, Secondary 37A10, 28A75, 28A33

description: We employ the ergodic theoretic machinery of scenery flows to address classical geometric measure theoretic problems on Euclidean spaces. Our main results include a sharp version of the conical density theorem, which we show to be closely linked to rectifiability. Moreover, we show that the dimension theory of measure-theoretical porosity can be reduced back to its set-theoretic version, that Hausdorff and packing dimensions yield the same maximal dimension for porous and even mean porous measures, and that extremal measures exist and can be chosen to satisfy a generalized notion of self-similarity. These are sharp general formulations of phenomena that had been earlier found to hold in a number of special cases.
description: v3: 30 pages, 2 figures, fixed typos and minor errors, to appear in Proc. London Math. Soc
Glacial-interglacial circulation changes inferred from 231Pa/230Th sedimentary record in the North Atlantic region
Creators: name: Gherardi, J. -M.
name: Labeyrie, L.
name: Nave, S.
name: Francois, R.
name: McManus, Jerry F.
name: Cortijo, E.
Publisher: name: Columbia University
Year: 2009
Subjects: Ocean circulation--Research
Paleoceanography
Last Glacial Maximum
Marine sediments--Analysis
Chemical oceanography
Hydrology
Submarine geology

description: Studies from the subtropical western and eastern Atlantic Ocean, using the 231Pa/230Th ratio as a kinematic proxy for deep water circulation, provided compelling evidence for a strong link between climate and the rate of meridional overturning circulation (MOC) over the last deglaciation. In this study, we present a compilation of existing and new sedimentary 231Pa/230Th records from North Atlantic cores between 1710 and 4550 m water depth. Comparing sedimentary 231Pa/230Th from different depths provides new insights into the evolution of the geometry and rate of deep water formation in the North Atlantic during the last 20,000 years. The 231Pa/230Th ratio measured in upper Holocene sediments indicates slow water renewal above ∼2500 m and rapid flushing below, consistent with our understanding of modern circulation. In contrast, during the Last Glacial Maximum (LGM), Glacial North Atlantic Intermediate Water (GNAIW) drove a rapid overturning circulation to a depth of at least ∼3000 m depth. Below ∼4000 m, water renewal was much slower than today. At the onset of Heinrich event 1, transport by the overturning circulation declined at all depths. GNAIW shoaled above 3000 m and significantly weakened but did not totally shut down. During the Bølling-Allerød (BA) that followed, water renewal rates further decreased above 2000 m but increased below. Our results suggest for the first time that ocean circulation during that period was quite distinct from the modern circulation mode, with a comparatively higher renewal rate above 3000 m and a lower renewal rate below in a pattern similar to the LGM but less accentuated. MOC during the Younger Dryas appears very similar to BA down to 2000 m and slightly slower below.
The intrinsic shapes of dwarf irregular galaxies
Creators: name: Roychowdhury, Sambit
name: Chengalur, Jayaram N.
name: Karachentsev, Igor D.
name: Kaisina, Elena I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use the measured B band axial ratios of galaxies from an updated catalog of Local Volume galaxies to determine the intrinsic shape of dwarf irregular galaxies (de Vacouleurs' morphological types 8, 9 and 10). We find that the shapes change systematically with luminosity, with fainter galaxies being thicker. In particular, we divide our sample into sub-samples and find that the most luminous dwarfs (-19.6 < M_B < -14.8) have thin discs (thickness ~ 0.2), with the disc being slightly elliptical (axial ratio ~ 0.8). At intermediate luminosity, viz. -14.8 < M_B < -12.6, the galaxies are still characterized by elliptical discs (axial ratio ~ 0.7), but the discs are somewhat thicker (thickness ~ 0.4). The faintest dwarfs, viz. those with -12.6 < M_B < -6.7 are well described as being oblate spheroids with an axial ratio ~ 0.5. The increasing thickness of the stellar discs of dwarf irregulars with decreasing luminosity is compatible with the increasing ratio of velocity dispersion to rotational velocity with decreasing galaxy size.
description: 5 pages, 6 figures, 2 tables. Accepted for publication in MNRAS Letters. For the definitive version visit http://mnrasl.oxfordjournals.org/
Microgale drouhardi G. Grandidier 1934
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Insectivora
Tenrecidae
Microgale
Microgale drouhardi

description: Microgale drouhardi G. Grandidier, 1934. Bull. Mus. Hist. Nat. Paris, 6:474. TYPE LOCALITY: Madagascar, near Diego Suarez. DISTRIBUTION: N. and S. E. Madagascar. ISIS NUMBER: 5301403002008006001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Insectivora, pp. 58-106 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 60, DOI: 10.5281/zenodo.7353001
Chiral symmetry and axial U(1) symmetry in finite temperature QCD with domain-wall fermion
Creators: name: Chiu, Ting-Wai
name: Chen, Wen-Ping
name: Chen, Yu-Chih
name: Chou, Han-Yi
name: Hsieh, Tung-Han
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the restoration of the spontaneously broken chiral symmetry and the anomalously broken axial U(1) symmetry in finite temperature QCD at zero chemical potential. We use 2 flavors lattice QCD with optimal domain-wall fermion on the $ 16^3 \times 6 $ lattice, with the extent $ N_s = 16 $ in the fifth dimension, in the temperature range $ T = 130-230 $ MeV. To examine the restoration of the chiral symmetry and the axial $ U(1) $ symmetry, we use diluted $ Z_2 $ noises to calculate the chiral condensate, and the chiral susceptibilities in the scalar and pseudoscalar meson channels, for flavor singlet and non-singlet respectively. From the degeneracy of the chiral susceptibilities around $ T_c $, it suggests that the axial $ U(1) $ symmetry is restored in the chirally symmetric phase. Moreover, we examine the spectral density $ ρ(λ_c) $ of the 4D effective Dirac operator with exact chiral symmetry, which is obtained by computing zero modes plus (180+180) conjugate pairs of low-lying modes for each gauge configuration. The suppression of low modes in the spectral density provides a consistency check of the restoration of axial $ U(1) $ symmetry in the chirally symmetric phase.
description: 7 pages, 6 figures, presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), 29 July - 3 August 2013, Mainz, Germany
Timing of meltwater pulse 1a and climate responses to meltwater injections
Creators: name: Stanford, Jennifer D.
name: Rohling, Eelco J.
name: Hunter, Sally E.
name: Roberts, Andrew P.
name: Rasmussen, Sune O.
name: Bard, Edouard
name: McManus, Jerry F.
name: Fairbanks, Richard G.
Publisher: name: Columbia University
Year: 2006
Subjects: Sea level--Research
Climatic changes--Research
Meltwater
Chemical oceanography
Hydrology
Paleoclimatology

description: The temporal relationship between meltwater pulse 1a (mwp-1a) and the climate history of the last deglaciation remains a subject of debate. By combining the Greenland Ice Core Project δ18O ice core record on the new Greenland ice core chronology 2005 timescale with the U/Th-dated Barbados coral record, we conclusively derive that mwp-1a did not coincide with the sharp Bølling warming but instead with the abrupt cooling of the Older Dryas. To evaluate whether there is a relationship between meltwater injections, North Atlantic Deep Water (NADW) formation, and climate change, we present a high-resolution record of NADW flow intensity from Eirik Drift through the last deglaciation. It indicates only a relatively minor 200-year weakening of NADW flow, coincident with mwp-1a. Our compilation of records also indicates that during Heinrich event 1 and the Younger Dryas there were no discernible sea level rises, and yet these periods were characterized by intense NADW slowdowns/shutdowns. Clearly, deepwater formation and climate are not simply controlled by the magnitude or rate of meltwater addition. Instead, our results emphasize that the location of meltwater pulses may be more important, with NADW formation being particularly sensitive to surface freshening in the Arctic/Nordic Seas.
Embedding criticality in learning technology professional development: an action research study
Creators: name: Ryan, Brendan
Publisher: name: University of Limerick
Year: 2023
Subjects: classificationCode: 39
subject: Education

description: As an action research study this research commenced as an attempt to address a gap between my beliefs and my practices - my experience of myself as a “living contradiction” (Whitehead 1989). As a learning technologist I believed that criticality should be at the centre of learning technology PD, but my practices did not reflect this belief. This research focused on a two-year learning technology PD programme with nine teachers working in FET in Irelands mid-west promoting the development of criticality framed as a broad, radical and potentially emancipatory concept which goes beyond critical thinking (Barnett 1997). Four research lenses were applied capturing my own perspective, those of the research participants, those of colleagues acting as critical friends and insights gleaned from literature. The study captures my own professional growth as my understanding of criticality evolved and I embraced the concept of critical being. Among the teachers the research exposed techno-positivity as dominant and uncovered the phenomena of “techno-magic” where new technologies were viewed as magical, and “techno-guilt” (Ryan et al. 2020) where some teachers blamed themselves for not using new technologies. These phenomena exist in a global context where technology use is promoted uncritically, and there is a propensity to blame teachers for the failure of technology led educational reform. The programme also brought a focus on the issue of agency and how the context in which teachers work frames the approaches they adopt. The research argues that bringing criticality to the core of technology adoption practice is crucially important but will require changes to current policy and involve bringing teachers and learners to the centre of the process. Only if teachers have a genuine stake in the development of the sector will the real possibilities of criticality be unlocked.
Lower export production during glacial periods in the equatorial Pacific derived from (231Pa/230Th)xs,0 measurements in deep-sea sediments
Creators: name: Pichat, Sylvain
name: Sims, Kenneth W. W.
name: François, Roger
name: McManus, Jerry F.
name: Leger, Susan Brown
name: Albarède, Francis
Publisher: name: Columbia University
Year: 2004
Subjects: Marine sediments--Analysis
Chemical oceanography
Submarine geology
Hydrology
Paleoclimatology

description: The (231Pa/230Th)xs,0 records obtained from two cores from the western (MD97-2138; 1°25′S, 146°24′E, 1900 m) and eastern (Ocean Drilling Program Leg 138 Site 849, 0°11.59′N, 110°31.18′W, 3851 m) equatorial Pacific display similar variability over the last 85,000 years, i.e., from isotopic stages 1 to 5a, with systematically higher values during the Holocene, isotopic stage 3, and isotopic stage 5a, and lower values, approaching the production rate ratio of the two isotopes (0.093), during the colder periods corresponding to isotopic stages 2 and 4. We have also measured the 230Th-normalized biogenic preserved and terrigenous fluxes, as well as major and trace elements concentrations, in both cores. The (231Pa/230Th)xs,0 results combined with the changes in preserved carbonate and opal fluxes at the eastern site indicate lower productivity in the eastern equatorial Pacific during glacial periods. The (231Pa/230Th)xs,0 variations in the western equatorial Pacific also seem to be controlled by productivity (carbonate and/or opal). The generally high (231Pa/230Th)xs,0 ratios (> 0.093) of the profile could be due to opal and/or MnO2 in the sinking particles. The profiles of (231Pa/230Th)xs,0 and 230Th-normalized fluxes indicate a decrease in exported carbonate, and possibly opal, during isotopic stages 2 and 4 in MD97-2138. Using 230Th-normalized flux, we also show that sediments from the two cores were strongly affected by sediment redistribution by bottom currents suggesting a control of mass accumulation rates by sediment focusing variability.
Intermediate β-shifts of finite type
Creators: name: Li, Bing
name: Sahlsten, Tuomas
name: Samuel, Tony
Publisher: name: arXiv
Year: 2014
Subjects: subject: Dynamical Systems (math.DS)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: Primary: 37B10, 58F17, Secondary: 11A67, 11R06

description: An aim of this article is to highlight dynamical differences between the greedy, and hence the lazy, $β$-shift (transformation) and an intermediate $β$-shift (transformation), for a fixed $β\in (1, 2)$. Specifically, a classification in terms of the kneading invariants of the linear maps $T_{β,α} \colon x \mapsto βx + α\bmod 1$ for which the corresponding intermediate $β$-shift is of finite type is given. This characterisation is then employed to construct a class of pairs $(β,α)$ such that the intermediate $β$-shift associated with $T_{β, α}$ is a subshift of finite type. It is also proved that these maps $T_{β,α}$ are not transitive. This is in contrast to the situation for the corresponding greedy and lazy $β$-shifts and $β$-transformations, for which both of the two properties do not hold.
description: v3: 19 pages, 6 figures, fixed typos and minor errors, to appear in Discrete Contin. Dyn. Syst. A
Cyberchondria: Impact of Online Search and Health Anxiety among Adolescents
Creators: name: Amrita A. Sivasanker
name: Poonam Thakur
name: Aastha Singh
name: Suman Pandey
name: Rebecca Dillu
name: Jyoti Shokeen
Publisher: name: Zenodo
Year: 2023
Subjects: Cyberchondria, Youth, Internet, Students, Anxiety, Distress.

description: Abstract
Background:  The internet has made it easier than ever for people to access information about medical conditions, symptoms, and treatments. While this can be helpful, it can also lead to anxiety and stress, as people may misinterpret information or convince themselves that they have a serious illness based on their online research known as Cyberchondria. Aim: To evaluate the cyberchondria level among non-medical students using CSS-15 tool. Methods: 200 undergraduaten on-medical students of different educational background were recruited. The self-administered 5 –point likert scale was used (Cyberchondria severity scale, English version). It has 5 domains which are scored from 0 to 4 but the mistrust of medical professional is scored in reverse order. Results: The data was received from 200 students, 110 females (55%) with mean age of 21 + 1.05 years. Students are severely affected in all constructs, "compulsion" (51%), "distress" (56%), "excessiveness" (68%), "reassurance" (60%), while majority were found to be having "mistrust on medical professional" (65%). Conclusion: The study concluded that almost all the non-medical students suffers from excessive using and relying on internet for medical information. That is the main cause of anxiety and distress among the youth especially after the covid pandemic, where vast amount of medical information is searched.
Response of the thermohaline circulation to cold climates
Creators: name: Wang, Zhaomin
name: Mysak, Lawrence A.
name: McManus, Jerry F.
Publisher: name: Columbia University
Year: 2002
Subjects: Meridional overturning circulation
Global cooling
Chemical oceanography--Research
Chemical oceanography
Hydrology
Paleoclimatology

description: A coupled atmosphere-ocean-sea ice-land surface-ice sheet model of intermediate complexity, the so-called McGill Paleoclimate Model, is employed to study the response of the thermohaline circulation (THC) to various global climate coolings, which are realized by increasing the present-day planetary emissivity to various values. Generally, it is found that the response of the THC to global cooling is nonlinear: For a slightly cold climate the THC in the North Atlantic and the Pacific upwelling become intensified. For a very cold climate the THC in the North Atlantic may be weakened or even collapsed. The associated Pacific upwelling for a very cold climate also becomes weak when the THC is weakened, and intermediate deep water may form in the Pacific when the THC is collapsed. Some support for this nonlinear response is found in recent paleoceanographic data. The reduced atmospheric poleward moisture transport due to the global cooling is mainly responsible for the intensification of the THC in the North Atlantic for a slightly cold climate. For a very cold climate the global cooling may lead to a decrease of the meridional surface density gradient and an increase of the vertical density difference (lower layer density minus upper layer density) in the deep water formation region, which can weaken or shut down the THC. It is the temperature-dependent part of the density differences that is mainly responsible for the weakening or shutting down of the THC. The potential influence of surface temperature changes must be taken into account for a full understanding of the role of the THC in the climate system.
One-dimensional $Z_2$ lattice gauge theory in periodic Gauss-law sectors
Creators: name: Sharma, Vaibhav
name: Mueller, Erich J
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We calculate the properties of a one-dimensional $Z_2$ lattice gauge theory in different Gauss law sectors, corresponding to different configurations of static charges set by the orientations of the gauge spins. Importantly, in quantum simulator experiments these sectors can be accessed without adding any additional physical particles or changing the Hamiltonian: The Gauss law sectors are simply set by the initial conditions. We study the interplay between conservation laws and interactions when the static charges are chosen to form periodic patterns. We classify the different Gauss law sectors and use the density matrix renormalization group to calculate the ground state compressibility, density profiles, charge density wave order parameters, and single particle correlation functions as a function of matter density. We find confined and deconfined phases, charge density waves, correlated insulators, and supersolids.
description: 11 pages, 11 figures ; Minor revisions in response to referee comments and typo corrections
Microgale longicaudata Thomas 1883
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Insectivora
Tenrecidae
Microgale
Microgale longicaudata

description: Microgale longicaudata Thomas, 1883. J. Linn. Soc. Lond., Zool., 16: 319. TYPE LOCALITY: Madagascar, E. Betsileo, Ankafana Forest. DISTRIBUTION: Ankafana forest (E. Madagascar). ISIS NUMBER: 5301403002008008001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Insectivora, pp. 58-106 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 60, DOI: 10.5281/zenodo.7353001
Callable Option and Note Valuation
Creators: name: Lee, David
Publisher: name: Zenodo
Year: 2021
Subjects: callable option, callable note, callable exotics

description: Callable note or callable exotics are among the most challenging derivatives to price. These products are loosely defined by the provision that the holder or issuer has the right to call the product or exercise into various underlying instruments after a lock-out period expires.
description: https://ia803403.us.archive.org/32/items/eq-callable-15/EqCallable-archive.pdf
Callable Option and Note Valuation
Creators: name: Lee, David
Publisher: name: Zenodo
Year: 2021
Subjects: callable option, callable note, callable exotics

description: Callable note or callable exotics are among the most challenging derivatives to price. These products are loosely defined by the provision that the holder or issuer has the right to call the product or exercise into various underlying instruments after a lock-out period expires.
description: https://ia801503.us.archive.org/32/items/eq-callable-15/EqCallable-15.pdf
Microgale longirostris Major 1896
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Insectivora
Tenrecidae
Microgale
Microgale longirostris

description: Microgale longirostris Major, 1896. Ann. Mag. Nat. Hist., ser. 6, 18: 318. TYPE LOCALITY: Madagascar, Ampitambe. DISTRIBUTION: S.E. Madagascar, central part of E. escarpment of E. plateau. ISIS NUMBER: 5301403002008009001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Insectivora, pp. 58-106 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 60, DOI: 10.5281/zenodo.7353001
The origin of the 1500-year climate cycles in Holocene North-Atlantic records
Creators: name: Debret, M.
name: Bout-Roumazeilles, V.
name: Grousset, F.
name: Desmet, M.
name: McManus, Jerry F.
name: Massei, N.
name: Sebag, D.
name: Petit, J.-R.
name: Copard, Y.
name: Trentesaux, A.
Publisher: name: Columbia University
Year: 2007
Subjects: Holocene Geologic Period
Wavelets (Mathematics)
Climatology
Environmental sciences
Climatic changes
Paleoclimatology

description: Since the first suggestion of 1500-year cycles in the advance and retreat of glaciers (Denton and Karlen, 1973), many studies have uncovered evidence of repeated climate oscillations of 2500, 1500, and 1000 years. During last glacial period, natural climate cycles of 1500 years appear to be persistent (Bond and Lotti, 1995) and remarkably regular (Mayewski et al., 1997; Rahmstorf, 2003), yet the origin of this pacing during the Holocene remains a mystery (Rahmstorf, 2003), making it one of the outstanding puzzles of climate variability. Solar variability is often considered likely to be responsible for such cyclicities, but the evidence for solar forcing is difficult to evaluate within available data series due to the shortcomings of conventional time-series analyses. However, the wavelets analysis method is appropriate when considering non-stationary variability. Here we show by the use of wavelets analysis that it is possible to distinguish solar forcing of 1000- and 2500- year oscillations from oceanic forcing of 1500-year cycles. Using this method, the relative contribution of solar-related and ocean-related climate influences can be distinguished throughout the 10 000 yr Holocene intervals since the last ice age. These results reveal that the 1500-year climate cycles are linked with the oceanic circulation and not with variations in solar output as previously argued (Bond et al., 2001). In this light, previously studied marine sediment (Bianchi and McCave, 1999; Chapman and Shackleton, 2000; Giraudeau et al., 2000), ice core (O'Brien et al., 1995; Vonmoos et al., 2006) and dust records (Jackson et al., 2005) can be seen to contain the evidence of combined forcing mechanisms, whose relative influences varied during the course of the Holocene. Circum-Atlantic climate records cannot be explained exclusively by solar forcing, but require changes in ocean circulation, as suggested previously (Broecker et al., 2001; McManus et al., 1999).
Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene
Creators: name: Raymo, Maureen E.
name: Oppo, Delia W.
name: Flower, B. P.
name: Hodell, D. A.
name: McManus, Jerry F.
name: Venz, K. A.
name: Kleiven, K. F.
name: McIntyre, K.
Publisher: name: Columbia University
Year: 2004
Subjects: Chemical oceanography--Research
Marine sediments--Analysis
Pleistocene Geologic Epoch
Submarine geology
Hydrology
Paleoclimatology

description: Geochemical profiles from the North Atlantic Ocean suggest that the vertical δ13C structure of the water column at intermediate depths did not change significantly between glacial and interglacial time over much of the Pleistocene, despite large changes in ice volume and iceberg delivery from nearby landmasses. The most anomalous δ13C profiles are from the extreme interglaciations of the late Pleistocene. This compilation of data suggests that, unlike today (an extreme interglaciation), the two primary sources of northern deep water, Norwegian-Greenland Sea and Labrador Sea/subpolar North Atlantic, had different characteristic δ13C values over most of the Pleistocene. We speculate that the current open sea ice conditions in the Norwegian-Greenland Sea are a relatively rare occurrence and that the high-δ13C deep water that forms in this region today is geologically unusual. If northern source deep waters can have highly variable δ13C, then this likelihood must be considered when inferring past circulation changes from benthic δ13C records.
Microgale majori Thomas 1918
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Insectivora
Tenrecidae
Microgale
Microgale majori

description: Microgale majori Thomas, 1918. Ann. Mag. Nat. Hist., ser. 9, 1:302. TYPE LOCALITY: Madagascar, Ankafana Forest. DISTRIBUTION: E. Betsileo (E. Madagascar). ISIS NUMBER: 5301403002008010001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Insectivora, pp. 58-106 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 60, DOI: 10.5281/zenodo.7353001
Application of an inverse method to interpret 231Pa/230Th observations from marine sediments
Creators: name: Burke, Andrea
name: Marchal, Olivier
name: Bradtmiller, Louisa I.
name: McManus, Jerry F.
name: François, Roger
Publisher: name: Columbia University
Year: 2011
Subjects: Ocean circulation--Research
Paleoceanography
Marine sediments--Analysis
Chemical oceanography
Hydrology
Submarine geology

description: Records of 231Pa/230Th from Atlantic sediments have been interpreted to reflect changes in ocean circulation during the geologic past. Such interpretations should be tested with due regard to the limited spatial coverage of 231Pa/230Th data and the uncertainties in our current understanding of the behavior of both nuclides in the ocean. Here an inverse method is used to evaluate the information contained in 231Pa/230Th compilations for the Holocene, Last Glacial Maximum (LGM), and Heinrich Event 1 (H1). An estimate of the abyssal circulation in the modern Atlantic Ocean is obtained by combining hydrographic observations and dynamical constraints. Then sediment 231Pa/230Th data for each time interval are combined with an advection-scavenging model in order to determine their (in)consistency with the modern circulation estimate. We find that the majority of sediment 231Pa/230Th data for the Holocene, LGM, or H1 can be brought into consistency with the modern circulation if plausible assumptions are made about the large-scale distribution of 231Pa and about model uncertainties. Moreover, the adjustments in the data needed to reach compatibility with a hypothetical state of no flow (no advection) are positively biased for each time interval, suggesting that the 231Pa/230Th data (including that for H1) are more consistent with a persistence of some circulation than with no circulation. Our study does not imply that earlier claims of a circulation change during the LGM or H1 are inaccurate, but that these claims cannot be given a rigorous basis given the current uncertainties involved in the analysis of the 231Pa/230Th data.
title: Kraynska Grammatika; 1783
title: das ist: Die kraynerische Grammatik oder Kunst die kraynerische Sprache regelrichtig zu reden, und zu schreiben ...
titleType: Subtitle
Creators: name: Pohlin, Marko
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2008

description: Vorlageform des Erscheinungsvermerks: Laybach gedruckt bey Joh. Friedr. Eger, Landschaft. Buchdr. Im Verlage von Lorenz Bernbacher, Burgerl. Buchbinder 1783
Alkenones as paleoceanographic proxies
Creators: name: Sachs, Julian P.
name: Schneider, Ralph R.
name: Eglinton, Timothy I.
name: Freeman, Katherine H.
name: Ganssen, Gerald
name: McManus, Jerry F.
name: Oppo, Delia W.
Publisher: name: Columbia University
Year: 2000
Subjects: Biochemical markers
Chemical oceanography
Paleoceanography
Environmental sciences
Paleoclimatology

description: Alkenone-derived estimates of temperature and CO2 are contributing to our understanding of Earth's climate history. In order to increase confidence in alkenone-based climate proxies we recommend the following actions. First, the sedimentary component or fraction containing alkenones should be identified in order to assess the impact of horizontal advection and vertical mixing on alkenone-derived temperature and CO2 estimates. Second, differential mixing rates of alkenone-containing particles and sand-sized foraminifera should be quantified by independent dating of the two phases. Until that is accomplished, apparent temporal offsets of climate proxies in the two phases should be interpreted cautiously. Third, the stability of the unsaturation ratio and carbon isotopic compositions of alkenones during all phases of diagenesis should be confirmed. Both field and laboratory observations are required. Fourth, future alkenone investigations should be coupled with other paleoclimate proxy measurements at high-deposition-rate-sites in a variety of oceanographic settings. In upwelling regions and in the vicinity of river plumes, salinity and nutrient proxies should be measured since changes in these parameters may affect alkenone biosynthesis.
Large deglacial shifts of the Pacific Intertropical Convergence Zone
Creators: name: Jacobel, Allison W.
name: McManus, Jerry F.
name: Anderson, Robert F.
name: Winckler, Gisela
Publisher: name: Columbia University
Year: 2016
Subjects: Atmospheric circulation
Hydrology
Intertropical convergence zone
Paleoclimatology

description: The position of the Intertropical Convergence Zone (ITCZ) is sensitive to changes in the balance of heat between the hemispheres which has fundamental implications for tropical hydrology and atmospheric circulation. Although the ITCZ is thought to experience the largest shifts in position during deglacial stadial events, the magnitude of shifts has proven difficult to reconstruct, in part because of a paucity of high-resolution records, particularly those including spatial components. Here we track the position of the ITCZ from 150 to 110 ka at three sites in the central equatorial Pacific at sub-millennial time resolution. Our results provide evidence of large, abrupt changes in tropical climate during the penultimate deglaciation, coincident with North Atlantic Heinrich Stadial 11 (~136–129 ka). We identify this event both as a Northern Hemisphere increase in aeolian dust and as a shift in the mean position of the ITCZ a minimum of 4° southwards at 160° W.
Sub-arcsec Observations of NGC 7538 IRS 1: Continuum Distribution and Dynamics of Molecular Gas
Creators: name: Zhu, Lei
name: Zhao, Jun-Hui
name: Wright, Melvyn
name: Sandell, Göran
name: Shi, Hui
name: Wu, Yue-Fang
name: Brogan, Crystal
name: Corder, Stuartt
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report new results based on the analysis of the SMA and CARMA observations of NGC 7538\,IRS\,1 at 1.3 and 3.4 mm with sub-arcsec resolutions. With angular resolutions $\sim$ 0\farcs7, the SMA and CARMA observations show that the continuum emission at 1.3 and 3.4 mm from the hyper-compact \ion{H}{2} region IRS\,1 is dominated by a compact source with a tail-like extended structure to the southwest of IRS\,1. With a CARMA B-array image at 1.3 mm convolved to 0\farcs1, we resolve the hyper-compact \ion{H}{2} region into two components: an unresolved hyper-compact core, and a north-south extension with linear sizes of $<270$ AU and $\sim$2000 AU, respectively. The fine structure observed with CARMA is in good agreement with the previous VLA results at centimeter wavelengths, suggesting that the hyper-compact \ion{H}{2} region at the center of IRS\,1 is associated with an ionized bipolar outflow. We image the molecular lines OCS(19-18) and CH$_3$CN(12-11) as well as $^{13}$CO(2-1) surrounding IRS\,1, showing a velocity gradient along the southwest-northeast direction. The spectral line profiles in $^{13}$CO(2-1), CO(2-1), and HCN(1-0) observed toward IRS\,1 show broad redshifted absorption, providing evidence for gas infall with rates in the range of $3-10\times10^{-3}$ M$_\odot$ yr$^{-1}$ inferred from our observations.
description: 19 pages, 14 figures
Variations in mid-latitude North Atlantic surface water properties during the mid-Brunhes (MIS 9–14) and their implications for the thermohaline circulation
Creators: name: Voelker, A. H. L.
name: Rodrigues, T.
name: Billups, K.
name: Oppo, Delia W.
name: McManus, Jerry F.
name: Stein, R.
name: Hefter, J.
name: Grimalt, J. O.
Publisher: name: Columbia University
Year: 2010
Subjects: Meridional overturning circulation
Seawater--Composition
Chemical oceanography--Research
Chemical oceanography
Hydrology
Paleoclimatology

description: Stable isotope and ice-rafted debris records from three core sites in the mid-latitude North Atlantic (IODP Site U1313, MD01-2446, MD03-2699) are combined with records of ODP Sites 1056/1058 and 980 to reconstruct hydrographic conditions during the middle Pleistocene spanning Marine Isotope Stages (MIS) 9–14 (300–540 ka). Core MD03-2699 is the first high-resolution mid-Brunhes record from the North Atlantic's eastern boundary upwelling system covering the complete MIS 11c interval and MIS 13. The array of sites reflect western and eastern basin boundary current as well as north to south transect sampling of subpolar and transitional water masses and allow the reconstruction of transport pathways in the upper limb of the North Atlantic's circulation. Hydrographic conditions in the surface and deep ocean during peak interglacial MIS 9 and 11 were similar among all the sites with relative stable conditions and confirm prolonged warmth during MIS 11c also for the mid-latitudes. Sea surface temperature (SST) reconstructions further reveal that in the mid-latitude North Atlantic MIS 11c is associated with two plateaus, the younger one of which is slightly warmer. Enhanced subsurface northward heat transport in the eastern boundary current system, especially during early MIS 11c, is denoted by the presence of tropical planktic foraminifer species and raises the question how strongly it impacted the Portuguese upwelling system. Deep water ventilation at the onset of MIS 11c significantly preceded surface water ventilation. Although MIS 13 was generally colder and more variable than the younger interglacials the surface water circulation scheme was the same. The greatest differences between the sites existed during the glacial inceptions and glacials. Then a north – south trending hydrographic front separated the nearshore and offshore waters off Portugal. While offshore waters originated from the North Atlantic Current as indicated by the similarities between the records of IODP Site U1313, ODP Site 980 and MD01-2446, nearshore waters as recorded in core MD03-2699 derived from the Azores Current and thus the subtropical gyre. Except for MIS 12, Azores Current influence seems to be related to eastern boundary system dynamics and not to changes in the Atlantic overturning circulation.
The effect of pump depletion on reversible photodegradation
Creators: name: Anderson, Benjamin
name: Hung, Sheng-Ting
name: Kuzyk, Mark G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We model the effect of pump depletion on reversible photodegradation using the extended domain model[Anderson and Kuzyk, arXiv:1309.5176v1, 2013] and the Beer-Lambert law. We find that neglecting pump absorption in the analysis of the linear optical transmittance leads to an underestimate of the degree and rate of photodegradation. The model is used to accurately measure the molecular absorbance cross sections of the three species involved in photodegradation of disperse orange 11 dye in (poly)methyl-methacralate polymer (DO11/PMMA). Finally we find that the processing history of a dye-doped polymer affects reversible photodegradation, with polymerized monomer solutions of DO11 being more photostable than those prepared from solvent evaporated dye-polymer solutions.
description: 7 pages, 7 figures