cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Paleogene time scale miscalibration: Evidence from the dating of the North Atlantic igneous province
Creators: name: Aubry, Marie-Pierre
name: Swisher, Carl C.
name: Kent, Dennis V.
name: Berggren, William A.
Publisher: name: Columbia University
Year: 2003
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences
subject: Paleoclimatology

description: Jolley et al. (2002) have proposed that the date of the Paleocene - Eocene thermal maximum is ca. 60 Ma, at least 5 m.y. older than currently estimated and, as a result, argue that the Paleogene time scale of Berggren et al. (1995) is grossly miscalibrated. The implications of this proposal are implausible, and we attribute the discrepancy in age noted by Jolley et al. (2002) to miscorrelation of the Staffa-type palynofloras and ambiguous isotopic dates from the North Atlantic igneous province.
The CKM Matrix from Lattice QCD
Creators: name: Mackenzie, Paul B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Lattice QCD plays an essential role in testing and determining the parameters of the CKM theory of flavor mixing and CP violation. Very high precisions are required for lattice calculations analysing CKM data; I discuss the prospects for achieving them. Lattice calculations will also play a role in investigating flavor mixing and CP violation beyond the Standard Model.
description: To appear in Prog. Theor. Phys. Vol. 122, No.1 (Special Issue)
title: Utah Elementary School Principals’ Preparation as Technology Leaders
Creators: name: Esplin, Nathan
Publisher: name: Utah State University
Year: 2017

description: The rapidly expanding use of technology in education has brought about the need for principals to be prepared as technology leaders. Although, there is a need for principals to be prepared as technology leaders, many currently are not prepared for this role. It is crucial that principals are prepared in order ability to lead their school in successful technology integration. The primary purpose of this quantitative study was to determine the perceived level of technology leadership preparation of Utah elementary principals using the International Society for Technology in Education (ISTE) Standards for Administrators.
In addition to the study’s primary purpose, the study identified the types and quantity of professional development principals are receiving and how this professional development relates to the principals’ levels of technology leadership. In addition, this study concluded whether or not the perceived technology leadership preparedness level of Utah principals correlates with the number of hours spent in technology leadership training. Furthermore, the study compared differences in technology leadership preparation levels based on principal characteristics.
Literature shows that technology leadership research is scarce. The findings from this study will help fulfill some of the need for additional technology leadership research. In addition, the findings can help educators have a better understanding of how to prepare principals to be effective technology leaders.
The data for this study were collected from 129 Utah elementary school principals using the 2009 Principals Technology Leadership Assessment (PTLA). This survey used the 2009 ISTE Standards for Administrators as the framework. The results were analyzed using descriptive statistics, Pearson correlation, t test, ANOVA, and qualitative coding. The findings provide evidence that Utah elementary school principals are not adequately prepared to lead as technology leaders. Furthermore, a technology leadership professional development model has been designed to further assist educators.
Airborne gravity and precise positioning for geologic applications
Creators: name: Bell, Robin E.
name: Childers, Vicki A.
name: Arko, Robert A.
name: Blankenship, Donald D.
name: Brozena, John M.
Publisher: name: Columbia University
Year: 1999
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences
subject: Airborne gravimetry

description: Airborne gravimetry has become an important geophysical tool primarily because of advancements in methodology and instrumentation made in the past decade. Airborne gravity is especially useful when measured in conjunction with other geophysical data, such as magnetics, radar, and laser altimetry. The aerogeophysical survey over the West Antarctic ice sheet described in this paper is one such interdisciplinary study. This paper outlines in detail the instrumentation, survey and data processing methodology employed to perform airborne gravimetry from the multiinstrumented Twin Otter aircraft. Precise positioning from carrier-phase Global Positioning System (GPS) observations are combined with measurements of acceleration made by the gravity meter in the aircraft to obtain the free-air gravity anomaly measurement at aircraft altitude. GPS data are processed using the Kinematic and Rapid Static (KARS) software program, and aircraft vertical acceleration and corrections for gravity data reduction are calculated from the GPS position solution. Accuracies for the free-air anomaly are determined from crossover analysis after significant editing (2.98 mGal rms) and from a repeat track (1.39 mGal rms). The aerogeophysical survey covered a 300,000 km2 region in West Antarctica over the course of five field seasons. The gravity data from the West Antarctic survey reveal the major geologic structures of the West Antarctic rift system, including the Whitmore Mountains, the Byrd Subglacial Basin, the Sinuous Ridge, the Ross Embayment, and Siple Dome. These measurements, in conjunction with magnetics and ice-penetrating radar, provide the information required to reveal the tectonic fabric and history of this important region.
Examination of Indentations Produced by Photocopiers
Creators: name: Pluchar, Anne
Publisher: name: University of Illinois at Chicago
Year: 2022
Subjects: Uncategorized

description: Questioned Document Examiners analyze a variety of evidence. Although there are other methods of photocopier identification, one area that has not received as much investigation is the effect of the internal mechanisms of photocopiers on the paper processed through them. As paper is carried through the photocopier it interacts with feeding mechanisms which may leave indentations on the sample. These indentations can be visualized using an electrostatic detection apparatus. Using this method, samples representative of every possible pathway a piece of paper could take through a photocopier were collected for analysis from three photocopiers, a Canon imageRUNNER Advance 4251, a Canon imageRUNNER Advance DX 4751i, and a Canon imageRUNNER Advance C5560i. When samples from the same photocopiers were compared, those with enough detail visualized showed consistent similarities across samples, and a lack of dissimilarities. When samples from different photocopiers were compared, there were some visible similarities, but there were also noticeable differences. Additionally, several samples developed wide bands or stamp marks. These features also exhibited similarities and dissimilarities with those on other samples. Blind testing was completed, which supported the validity of this method. The results of this analysis suggest that the indentations produced by photocopiers is a viable method for use in questioned document analysis.
The synthesis of adsorbents for metal ions in soils and ores
Creators: name: Grosse, Andrew Clifton
Publisher: name: University Of Tasmania
Year: 2023

description: A series of porous copolymer resins with ionogenic or chelating functional groups was prepared from commercial polystyrene or polymethacrylate precursors. Samples of all resins were supplied to Geo2 laboratories for assessment of their efficacy in a proprietary heavy metal remediation process. Two of these resins, DMA-1 and CMS-2, were prepared in bulk to supply pilot scale testing. The crosslinked resin-bead substrates used were: chloromethylated polystyrene (CMS), diethylenetriamine poly(methacrylamide) (DMA), glycidyl methacrylate (GMA), and three types of poly(methyl methacrylate) (MMA, MMB & MMC) with varying degrees of porosity and crosslinking. The alkyl halide moiety of CMS was used to anchor 2¬¨‚àû or 3¬¨‚àû alkylamines, diethylenetriamine, tris(2-aminoethylamine), or a quaternary ammonium group. Alternatively, a primary amine group was introduced via hydrolysis of hexamethylene tetramine. Poly(ethylene glycol)s of various sizes were affixed to the chloromethylated substrate via Williamson ether synthesis to form \pseudocrown\" ether chains. Benzocrown ether groups were produced by anchoring catechol to the CMS resin and subsequent reaction with acodichloropoly(ethylene glycol). Functional groups on poly(methyl methacrylate) resins were introduced via hydrolysis of the backbone or by aminolysis with tris(2- aminoethyl)amine or 2-aminoethanol. The epoxide moiety of GMA was alkylated with either high-pressure ammonia tris(2-aminoethyl)amine or various grades of poly(ethylene glycol)s. Hydrolysis of the epoxide in aqueous acid was also investigated. Resins with aminocarboxylate moieties were prepared via carboxymethylation of resins with primary amine or diethylenetriamine groups (including DMA) using excess chloroacetic acid in aqueous carbonate solution. The moieties prepared were diethylenetriamine triacetic- and tetraacetic- acids and aminodiacetic acid. Several nonporous pseudocrown ether materials were also produced via copolymerisation yielding urethane or methacrylate substrates. The resins were characterised by elemental analysis and by their Infra-Red spectra. A subset of resins was also characterised by their affinity and capacity to adsorb metal ions in aqueous solution. The sorption of copper from a 75 ppm solution into these resins was measured over a 25 hour period. Adsorption isotherms for Cu 2+ in 0.010 M aqueous hydrochloric acid were also obtained in the range 10-75 ppm. The highest metal capacities were achieved with aminocarboxylate functionalities; amine resins adsorbed very little."
Gravity field over the Sea of Galilee: Evidence for a composite basin along a transform fault
Creators: name: Ben-Avraham, Zvi
name: Ten Brink, Uri
name: Bell, Robin E.
name: Reznikov, Margaret
Publisher: name: Columbia University
Year: 1996
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences

description: The Sea of Galilee (Lake Kinneret) is located at the northern portion of the Kinneret-Bet Shean basin, in the northern Dead Sea transform. Three hundred kilometers of continuous marine gravity data were collected in the lake and integrated with land gravity data to a distance of more than 20 km around the lake. Analyses of the gravity data resulted in a free-air anomaly map, a variable density Bouguer anomaly map, and a horizontal first derivative map of the Bouguer anomaly. These maps, together with gravity models of profiles across the lake and the area south of it, were used to infer the geometry of the basins in this region and the main faults of the transform system. The Sea of Galilee can be divided into two units. The southern half is a pull-apart that extends to the Kinarot Valley, south of the lake, whereas the northern half was formed by rotational opening and transverse normal faults. The deepest part of the basinal area is located well south of the deepest bathymetric depression. This implies that the northeastern part of the lake, where the bathymetry is the deepest, is a young feature that is actively subsiding now. The pull-apart basin is almost symmetrical in the southern part of the lake and in the Kinarot Valley south of the lake. This suggests that the basin here is bounded by strike-slip faults on both sides. The eastern boundary fault extends to the northern part of the lake, while the western fault does not cross the northern part. The main factor controlling the structural complexity of this area is the interaction of the Dead Sea transform with a subperpendicular fault system and rotated blocks.
Comment on "Tectonic Rotations in Extensional Regimes and Their Paleomagnetic Consequences for Ocean Basalts" by Kenneth L. Verosub and Eldridge M. Moores
Creators: name: Cande, Steven C.
name: Kent, Dennis V.
Publisher: name: Columbia University
Year: 1985
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences

description: One of the more intriguing results from palcomagnetic studies of Deep Sea Drilling Project (DSDP) basalts is that a surprisingly large number of samples have inclinations that deviate significantly from expected values. Vetosub and Moores [1981] sought to account for what appear to be systematic departures of mean inclination at several DSDP basement sites in terms of tectonic rotations along listtic normal faults. Such rotations, about horizontal axes perpendicular to the extension direction and typically amounting to 30ø-50 ø but as large as 70 ø to 90 ø, were suggested to be characteristic of an extensional tectonic regime such as near an ocean spreading ridge system. There is a clear implication that large tectonic rotations are a characteristic process associated with ocean crust formation.
Spontaneous Lorentz Violation, Negative Energy and the Second Law of Thermodynamics
Creators: name: Feldstein, Brian
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We reconsider the possibility of violating the generalized second law of thermodynamics in theories with spontaneous Lorentz violation. It has been proposed that this may be accomplished in particular with a black hole immersed in a ghost condensate background, which may be taken to break Lorentz invariance without appreciably distorting the space-time geometry. In this paper we show that there in fact exist solutions explicitly describing flow of negative energy into these black holes, allowing for violation of the second law in a very simple way. This second law violation is independent of any additional assumptions such as couplings of the ghost condensate to secondary fields, and suggests that violation of the null energy condition may be the true source of pathology in these theories.
description: 16 pages; v2: published version
title: A Descriptive Case Study of Writing Standards-Based Individualized Education Plan Goals Via Problem-Based Learning in a Virtual World
Creators: name: Blair, Peter J.
Publisher: name: Utah State University
Year: 2017

description: The goal of this study was to examine the professional development experiences of two participants while they were creating standards-based individualized education plan (IEP) goals using a virtual world called TeacherSim. The focuses of the study were how did special educators engage with the task of creating standards-based IEP goals using TeacherSim and how did TeacherSim support or hinder this? This research used a descriptive case study selecting two participants from the larger data set of seven participants. The data was analyzed using qualitative coding which compared the observed experiences with the case propositions. This case study demonstrated that special education professionals can work at a distance to learn the process of creating standards-based IEP goals while using the technology of a virtual world. Similarly, the use of virtual world technology appeared to facilitate feelings of physical and social presence, which aided in online collaborative activities.
P coda evidence for a layer of anomalous velocity in the upper crust beneath Leduc, Alberta.
Creators: name: Somerville, Paul Graham
Publisher: name: University of British Columbia
Year: 2011

description: Previous seismic studies of crustal structure using short-period P coda recorded in the vicinity of Leduc, central Alberta have indicated that serious discrepancies between the experimental observations and those based on a horizontally layered model of the crust exist in both the time and frequency domains. This 'Standard' crustal model is based on well log data for the sedimentary section, and on seismic refraction work in southern Alberta for the lower layers. The principal discrepancy lies in the large amplitude radial motion on the experimental seismograms which lags vertical arrivals by approximately two seconds. It is concluded that this radial motion, which is absent from synthetic seismograms generated using the 'Standard' crustal model, represents the generation of large-amplitude shear waves within the crust. This large radial motion is manifested in the frequency domain by experimental vertical-radial spectral ratios which are considerably lower than those computed using the 'Standard' crustal model. Using vertical-radial spectral ratios-and synthetic seismograms, a modified crustal model has been derived which gives much better agreement between experimental and theoretical results. This model involves the insertion of a layer several kilometers thick having large velocity contrast with respect to the surrounding media at the base of the Precam-brian basement (12 km deep). The new crustal model is discussed in the light of widespread evidence for a low velocity zone in the upper crust in continental regions. Several important discrepancies between experimental and synthetic seismograms remain unresolved: among these are the small onset amplitude and the character of the delayed motion of the radial component.
Short polarity intervals within the Matuyama: transitional field records from hydraulic piston cored sediments from the North Atlantic
Creators: name: Clement, Brad M.
name: Kent, Dennis V.
Publisher: name: Columbia University
Year: 1986
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences
subject: Plate tectonics

description: Detailed sampling of two short magnetozones within the Matuyama Chronozone recorded at DSDP Site 609 (49.86°N, 335.77°E) confirms that one, the Cobb Mountain Subchronozone (1.12 Ma), is a very short, full normal polarity interval and that the other, the older interval, is a record of a geomagnetic excursion which occurred at approximately 1.55 Ma. The Cobb Mountain Subchron lasted approximately 25,000 years, one third the duration of the Jaramillo Subchron. The normal polarity interval is bounded by two transition zones which document an antisymmetry in the sequence of directions in the reverse to normal and normal to reverse polarity transitions. We interpret the antisymmetry as reflecting a dependence upon the sense of the reversal, without significant changes in the relative contributions of non-dipole terms. The polarity interval recorded at 1.55 Ma lasted only 8,800 years with what may be regarded as full polarity directions observed across only 3 cm of stratigraphic section. This feature is interpreted as an excursion of the geomagnetic field and appears to be correlative with the Gilsa Subchron. Similarities between the transition bounding these two magnetozones suggest that these features occur as the result of the same process or triggering mechanisms in the earth's outer core.
Isotope shifts and hyperfine structure of the Fe I 372 nm resonance line
Creators: name: Krins, S.
name: Oppel, S.
name: Huet, N.
name: von Zanthier, J.
name: Bastin, T.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report measurements of the isotope shifts of the $3d^64s^2 a ^5D_4 - 3d^64s4p z ^5F_5^o$ Fe I resonance line at 372 nm between all four stable isotopes $^{54}$Fe, $^{56}$Fe, $^{57}$Fe, and $^{58}$Fe, as well as the complete hyperfine structure of that line for $^{57}$Fe, the only stable isotope having a non-zero nuclear spin. The field and specific mass shift coefficients of the transition have been derived from the data, as well as the experimental value for the hyperfine structure magnetic dipole coupling constant $A$ of the excited state of the transition in $^{57}$Fe: $A(3d^64s4p z ^5F_5^o) = 81.69(86)$ MHz. The measurements were done by means of Doppler-free laser saturated-absorption spectroscopy in a Fe-Ar hollow cathode using both natural and enriched iron samples. The measured isotope shifts and hyperfine constants are reported with uncertainties at the percent level.
description: 5 pages, 5 figures
Erratum: Dirichlet Forms and Dirichlet Operators for Infinite Particle Systems: Essential Self-adjointness
Creators: name: Choi, Veni
name: Park, Yong Moon
name: Yoo, Hyun Jae
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 82C22; 60K35

description: We reprove the essential self-adjointness of the Dirichlet operators of Dirchlet forms for infinite particle systems with superstable and sub-exponentially decreasing interactions.
description: This is an erratum to the work appeared in J. Math. Phys. 39(12), 6509-6536 (1998)
An on-line computer assisted mass spectrometer
Creators: name: Mitchell, David Laurie
Publisher: name: University of British Columbia
Year: 2011

description: An analog data acquisition system incorporating an Interdata Model 4 digital computer has been designed and built for a mass spectrometer. This system has been conceived with the primary objectives of improving analytical precision and production. Automated mass spectrometer operation allows for the collection of larger quantities of data while decreasing operator involvement and consequently diminishing operator bias and fatigue. The analog signal from the mass spectrometer measuring system is digitized using a digital voltmeter and transmitted, via an interface, to the processor where the digital information is manipulated in accordance with a computer program. An additional facility is provided whereby digital data from the processor can be displayed, if desired, on a 5 decade numerical readout situated at the mass spectrometer console. Hardware is also available in the interface to provide control of the magnetic field scan rate. A function control switch at the mass spectrometer console allows the operator to convey a variety of predetermined instructions to the computer at any time during the course of a run. Thus, the system provides for on-line (real time) data processing of mass spectra as well as limited computer control over the mass spectrometer. This thesis is primarily concerned with the design and construction of the logic hardware for this system together with a demonstration of its operating ability.
The dust condensation sequence in red super-giant stars
Creators: name: Verhoelst, T.
name: Van der Zypen, N.
name: Hony, S.
name: Decin, L.
name: Cami, J.
name: Eriksson, K.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context: Red super-giant (RSG) stars exhibit significant mass loss through a slow and dense wind. They are often considered to be the more massive counter parts of Asymptotic Giant Branch (AGB) stars. While the AGB mass loss is linked to their strong pulsations, the RSG are often only weakly variable. Aim: To study the conditions at the base of the wind, by determining the dust composition in a sample of RSG. The dust composition is thought to be sensitive to the density, temperature and acceleration at the base of the wind. Method: We compile a sample of 27 RSG infrared spectra (ISO-SWS) and supplement these with photometric measurements to obtain the full spectral energy distribution (SED). These data are modelled using a dust radiative transfer code. The results are scrutinised for correlations. Results: We find (1) strong correlations between dust composition, mass-loss rate and stellar luminosity, roughly in agreement with the theoretical dust condensation sequence, (2) the need for a continuous (near-)IR dust opacity and tentatively propose amorphous carbon, and (3) significant differences with AGB star winds: presence of PAHs, absence of 'the' 13 micron band, and a lack of strong water bands. Conclusions: Dust condensation in RSG is found to experience a similar freeze-out process as in AGB stars. Together with the positive effect of the stellar luminosity on the mass-loss rate, this suggests that radiation pressure on dust grains is an important ingredient in the driving mechanism. Still, differences with AGB stars are manifold and thus the winds of RSG deserve separate studies.
description: 12 pages, 9 figures, accepted for publication in A&A
title: The Effects of Increment and Decrement Manipulations on Titration Level Under Interlocking Progressive-Ratio Schedules of Reinforcement
Creators: name: Nunes, Dennis Lorbin
Publisher: name: Utah State University
Year: 1975

description: Generally human titration performance under schedules of reinforcement has not been investigated. In an attempt to examine the variables which control titration, an interlocking progressive-ratio schedule was devised. Under an interlocking progressive-ratio schedule, the number of responses required for reinforcement increases by a constant (the increment value) after every ratio, but during each ratio the response requirement can be lowered (the decrement value) by emitting pauses of a specified duration (the stepdown duration).
The first experiment sought to determine if children would titrate when exposed to interlocking progressive-ratio schedules. Although three of the four subjects did not show evidence of titration initially, through a series of manipulations all came under schedule control.
Experiment 2 was conducted to determine the effects of a series of increment value manipulations on the level of titration. The series of increment values was tested under large and small decrement conditions. The results showed that increment value was an important determiner of titration level only when the decrement value was small. When the decrement value was large, changes in increment value had no effect upon titration.
In Experiment 3 the effects of a series of decrement manipulations on titration level were examined. The decrement manipulations were investigated under two increment values. The results indicated that as the decrement value was decreased the titration level tended to increase under both increment conditions.
In all of the experiments, rate of responding, pausing, titration variability, and patterns of responding were examined. Generally rate of responding, pausing, and response patterning were found to be related to changes in increment and decrement values. Titration variability showed no systematic changes across manipulations.
Analysis of subjects' behavior in terms of preference indicated that the subjects tended to minimize number of responses rather than maximize reinforcement frequency. Subjects would pause to bring down the response requirement, and thus increase the time between reinforcements, rather than emit responses on a lever, which would have resulted in more reinforcements per unit of time.
SERVICIO DELIVERY: TENDENCIA DE HÁBITOS Y CONSUMO DE COMIDA MEDIANTE EL USO DE APLICACIONES MÓVILES
Creators: name: Guzmán, Helen Javier Chávez
Publisher: name: figshare
Year: 2021
Subjects: subject: 159999 Commerce, Management, Tourism and Services not elsewhere classified
subject: FOS: Economics and business
subject: 150501 Consumer-Oriented Product or Service Development
subject: 150401 Food and Hospitality Services
subject: 150599 Marketing not elsewhere classified

description: The use of mobile applications to order food has become something natural for the consumer living in the contingency caused by COVID-19, however, it has not become a habit or generated any dependence or addiction for this purpose. Through the application of an electronic survey made up of 27 items, the profile of the food consumer was analyzed through mobile apps, their habits and attitudes towards service in the state of Puebla, in order to generate marketing strategies to through segmentation. It was detected that factors such as saving time, money and speed in the delivery of food are valued by the majority; However, there is clearly a market segment that has characteristics that distinguish it in terms of profile and spending. The average use is of a single app, with Uber Eats being the one with the most demand, the most frequent time to buy food is at night, with an expense of less than $ 500 a month and the main reason is not to leaving home.
Orbital climate forcing of δ^13 excursions in the late Paleocene-early Eocene (chrons C24n-C25n)
Creators: name: Cramer, Benjamin S.
name: Wright, James D.
name: Kent, Dennis V.
name: Aubry, Marie-Pierre
Publisher: name: Columbia University
Year: 2003
Subjects: subject: Oceanography
subject: FOS: Earth and related environmental sciences
subject: Geophysics

description: High-resolution stable carbon isotope records for upper Paleocene-lower Eocene sections at Ocean Drilling Program Sites 1051 and 690 and Deep Sea Drilling Project Sites 550 and 577 show numerous rapid (40-60 kyr duration) negative excursions of up to 1‰. We demonstrate that these transient decreases are the expected result of nonlinear insolation forcing of the carbon cycle in the context of a long carbon residence time. The transients occur at maxima in Earth's orbital eccentricity, which result in high-amplitude variations in insolation due to forcing by climatic precession. The construction of accurate orbital chronologies for geologic sections older than ~35 Ma relies on identifying a high-fidelity recorder of variations in Earth's orbital eccentricity. We use the carbon isotope records as such a recorder, establishing a robust orbitally tuned chronology for latest Paleocene-earliest Eocene events. Moreover, the transient decreases provide a means of precise correlation among the four sites that is independent of magnetostratigraphic and biostratigraphic data at the <10^5-year scale. While the eccentricity-controlled transient decreases bear some resemblance to the much larger-amplitude carbon isotope excursion (CIE) that marks the Paleocene/Eocene boundary, the latter event is found to occur near a minimum in the ~400-kyr eccentricity cycle. Thus the CIE occurred during a time of minimal variability in insolation, the dominant mechanism for forcing climate change on 10^4-year scales. We argue that this is inconsistent with mechanisms that rely on a threshold climate event to trigger the Paleocene/Eocene thermal maximum since any threshold would more likely be crossed during a period of high-amplitude climate variations.
The relative stabilities of the reverse and normal polarity states of the earth's magnetic field
Creators: name: McFadden, Phillip L.
name: Merrill, Ronald T.
name: Lowrie, William
name: Kent, Dennis V.
Publisher: name: Columbia University
Year: 1987
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences

description: Recent analyses of the geomagnetic reversal sequence have led to different conclusions regarding the important question of whether there is a discernible difference between the properties of the two polarity states. The main differences between the two most recent studies are the statistical analyses and the possibility of an additional 57 reversal events in the Cenozoic. These additional events occur predominantly during reverse polarity time, but it is unlikely that all of them represent true reversal events. Nevertheless the question of the relative stabilities of the polarity states is examined in detail, both for the case when all 57 "events" are included in the reversal chronology and when they are all excluded. It is found that there is not a discernible difference between the stabilities of the two polarity states in either case. Inclusion of these short events does, however, change the structure of the non-stationarity in reversal rate, but still allows a smooth non-stationarity. Only 7 of the 57 short events are pre-38 Ma, but the evidence suggests that this is a real geomagnetic phenomenon rather than degradation of the magnetic recording or a bias in observation. This could be tested by detailed magnetostratigraphic and oceanic magnetic surveys of the Paleogene and Late Cretaceous. Overall it would appear that the present geomagnetic polarity timescale for 0–160 Ma is probably a very good representation of the actual history, and that different timescales and additional events now represent only changes in detail.
Constraints Imposed by the Shape of Marine Magnetic Anomalies on the Magnetic Source
Creators: name: Cande, Steven C.
name: Kent, Dennis V.
Publisher: name: Columbia University
Year: 1976
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences
subject: Oceanography

description: A two-layer source model for marine magnetic anomalies can accommodate several observations made on the shapes of anomalies in the Pacific and southeast Indian oceans. The layers are defined on the basis of cooling history and magnetic properties. The upper layer consists of rapidly cooled basalts, which acquire a strong magnetization near the ridge axis. This layer, with narrow transition zones, can account for the observed short polarity events. The lower layer consists of moderately magnetized, slowly cooled intrusive rocks in the lower oceanic crust. The transition zones in this layer are broad, sloping boundaries reflecting the delayed acquisition of magnetization with depth as, for example, along a sloping Curie point isotherm. The lower layer can account for a skewness discrepancy of 10°-15° in the observed skewness of some anomalies. It is shown that the upper layer has to contribute about three quarters of the total amplitude of magnetic anomalies in order for this model to simulate the observed shape of the anomalies. The model predicts that a deep drill hole located just to the older side of a reversal boundary in the upper part of the oceanic crust should encounter a magnetization polarity reversal within the lower oceanic crust.
Design of a low-cost electrical resistivity meter for near surface surveys
Creators: name: de la Vega, Matías
name: Bongiovanni, María Victoria
name: Grünhut, Vivian
Publisher: name: Zenodo
Year: 2021
Subjects: open source
DC electrical resistivity meter
arduino

description: A programmable automated electrical resistivity meter was designed and constructed. Even though this open source and low cost resistivity device was design primarily for archaeogeophysical studies, it could be adapted to other geophysical issues such as contamination plumes detection and characterization, tunnel detection, etc.
Looking for Intermediate-Mass Black Holes
Creators: name: Frampton, Paul H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A discussion of the entropy of the universe leads to the suggestion of very many intermediate-mass black holes between thirty and three hundred thousand solar masses in the halo. It is consistent with observations on wide binaries as well as microlensing and considerations of disk stability that such IMBHs constitute all cold dark matter
description: 4pp latex. Plenary talk at BSM-LHC conference, Northeastern University, June 2009
MPEC 2023-K156 : 2023 KG3
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 KG3

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
SERVICIO DELIVERY.pdf
Creators: name: Guzmán, Helen Javier Chávez
Publisher: name: figshare
Year: 2021
Subjects: subject: 159999 Commerce, Management, Tourism and Services not elsewhere classified
subject: FOS: Economics and business
subject: 150501 Consumer-Oriented Product or Service Development
subject: 150401 Food and Hospitality Services
subject: 150599 Marketing not elsewhere classified

description: The use of mobile applications to order food has become something natural for the consumer living in the contingency caused by COVID-19, however, it has not become a habit or generated any dependence or addiction for this purpose. Through the application of an electronic survey made up of 27 items, the profile of the food consumer was analyzed through mobile apps, their habits and attitudes towards service in the state of Puebla, in order to generate marketing strategies to through segmentation. It was detected that factors such as saving time, money and speed in the delivery of food are valued by the majority; However, there is clearly a market segment that has characteristics that distinguish it in terms of profile and spending. The average use is of a single app, with Uber Eats being the one with the most demand, the most frequent time to buy food is at night, with an expense of less than $ 500 a month and the main reason is not to leaving home.
Manipulation of zooplankton communities in waste stabilization lagoons, with a view to optimizing production for potential harvest
Creators: name: Doran, Niall Edward
Publisher: name: University Of Tasmania
Year: 2023

description: This project was developed as part of a program evaluating the potential coupling of biological waste treatment processes at the Werribee Treatment Complex (WTC) with the harvest of zooplankton material for commercial use. This work specifically aimed to manipulate the distribution of particular zooplankton species according to influent nutrient levels. The project was conducted on a scale that is rare for such ecological manipulations, with the flow pattern of an operational twelve pond, 70.5 hectare sewage treatment lagoon system being drastically altered to provide two comparable halves composed of paired ponds of similar size, orientation, influent and capacity. The system was subsequently subjected to a target sewage inflow level of 12 million litres a day, with the level of flow experimentally divided equally and unequally between the halves. Despite low and variable influent rates (due to unpredictable extrinsic factors), different and remarkably consistent patterns developed in the zooplankton communities for each flow regime. Zooplankton distribution and community structure changed markedly across the system following the alteration of flow from the original pattern. Under conditions of equal flow, zooplankton and various environmental concentrations - ammonia, nitrate, nitrite, phosphate and chlorophyll-a - synchronized well between corresponding ponds. Under unequal divisions of flow, both zooplankton and ammonia (representing a gross measure of overall nutrient loading) showed distinct differences between halves that directly corresponded with the new flow regimes, while patterns for nitrate, nitrite, phosphorus and chlorophyll-a reflected these changes by becoming increasingly disparate and chaotic. It is suggested that these changes in distribution represent a strong nutrient-mediated successional pattern that is overlaid on normal zooplankton seasonal succession and short-term population cycles in such highly eutrophic environments. The unique layout of lagoon systems at WTC promotes the spatial expression of this pattern in contrast to similar temporal (and smaller-scale spatial) changes documented in previous studies. Manipulations of nutrient-mediated succession as conducted in this thesis appear to promote distinct and predictable changes in the character and composition of traditionally variable zooplankton assemblages. Combined with appropriate and adjustable harvesting regimes, these could provide the first major step towards an optimized and sustainable product.
Conflict-driven adaptive control is enhanced by integral negative emotion on a short time scale*
Creators: name: Yang, Qian
name: Pourtois, Gilles
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Medicine
subject: Neuroscience
subject: Sociology
subject: FOS: Sociology
subject: Mental Health

description: Negative emotion influences cognitive control, and more specifically conflict adaptation. However, discrepant results have often been reported in the literature. In this study, we broke down negative emotion into integral and incidental components using a modern motivation-based framework, and assessed whether the former could change conflict adaptation. In the first experiment, we manipulated the duration of the inter-trial-interval (ITI) to assess the actual time-scale of this effect. Integral negative emotion was induced by using loss-related feedback contingent on task performance, and measured at the subjective and physiological levels. Results showed that conflict-driven adaptive control was enhanced when integral negative emotion was elicited, compared to a control condition without changes in defensive motivation. Importantly, this effect was only found when a short, as opposed to long ITI was used, suggesting that it had a short time scale. In the second experiment, we controlled for effects of feature repetition and contingency learning, and replicated an enhanced conflict adaptation effect when integral negative emotion was elicited and a short ITI was used. We interpret these new results against a standard cognitive control framework assuming that integral negative emotion amplifies specific control signals transiently, and in turn enhances conflict adaptation.
Feasibility and Preliminary Efficacy of Lactobacillus 299v on Maternal and Infant Iron Status Parameters
Creators: name: Oji Njideka Hemphill, Nefertiti
Publisher: name: University of Illinois at Chicago
Year: 2022
Subjects: Uncategorized

description: Abstract Background: Iron deficiency anemia (IDA) is the most prevalent form of anemia in pregnant women world-wide and is associated with adverse maternal and fetal health outcomes. Women that begin pregnancy iron deficient are at an increased risk of maternal and neonatal IDA, however the probiotic Lp299v has been shown to increase iron absorption in non-pregnant populations. Studies are needed to investigate the effects of Lp299v on iron status in pregnant women at increased risk for IDA. Objective: The aims of this randomized placebo-controlled pilot study were to evaluate the effects of Lp299v supplementation on feasibility and tolerability in pregnancy, and to examine its effects on maternal and neonatal hematological iron parameters and iron status in pregnant women at increased risk of IDA. Methods: A total of 21 pregnant women with low-iron stores were randomized at ≥ 20 weeks’ gestation (WG) to receive Lp299v + Prenatal Vitamin with iron (PNVI) or placebo + (PNVI) once daily through labor and delivery. Participant iron related hematological biomarkers, gastrointestinal (GI) symptoms and adverse events (AEs) data were collected at baseline, 24-28 WG, 34-36 WG and Labor and Delivery (L&D), and neonatal iron related hematological biomarkers were collected at L&D only. Results: Supplementation with Lp299v was well tolerated. The prevalence of AEs and GI symptoms were comparable between groups with a feasibility below expected level resulting from lower than projected study recruitment and retention. Based on a per protocol analysis, women with consuming Lp299v had a lower decline in hematological and iron status parameters compared to women in the placebo group. Neonatal hematological and iron status parameters were similar among the probiotic and placebo groups based on the per protocol analysis. Conclusion: Lp299v supplementation in pregnant women with low-iron stores was well tolerated and displayed a positive effect on maternal and neonatal iron related hematological parameters and iron status.
Self-mapping Degrees of 3-Manifolds
Creators: name: Sun, Hongbin
name: Wang, Shicheng
name: Wu, Jianchun
name: Zheng, Hao
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 57M50, 57M10, 55M20

description: For each closed oriented 3-manifold $M$ in Thurston's picture, the set of degrees of self-maps on $M$ is given.
description: 22 pages, 4 figures
Franciscan Complex limestone deposited at 17° South paleolatitude
Creators: name: Alvarez, Walter
name: Kent, Dennis V.
name: Silva, Isabella Premoli
name: Schweickert, Richard A.
name: Larson, Roger A.
Publisher: name: Columbia University
Year: 1980
Subjects: Geomorphology

description: At Laytonville, California, about 230 km north-northwest of San Francisco, three blocks of pelagic limestone, each a few tens of metres long, are incorporated in the Franciscan melange. Bedding is well defined, but top indicators are lacking. Paleomagnetic study of two of the blocks (16 samples, 52 specimens) yielded directions of D: 183.9°, I: −22.6°, α_95: 21.6° (block 1), and D: 229.5°, I: −31.8°, α_95: 10.7° (block 2) relative to the present orientation of bedding. Inclinations were not significantly different, but the difference in declinations shows that magnetization preceded emplacement of the blocks in the melange. Study of foraminifera showed that the blocks are of Albian and Cenomanian age and were deposited during the Cretaceous Long Normal Polarity Interval. Details of the foraminiferal zonation show that both blocks are right side up. The observed inclinations imply deposition on the Farallon plate at 17° ± 7° South paleolatitude at about 96 m.y. B.P. (block 2; block 1 data agree but are less definitive). Consideration of reasonable paleolongitudes and possible times of incorporation of the blocks in the melange indicates a Farallon–North America convergence rate significantly higher than any observed today. The most commonly accepted emplacement time (latest Cretaceous) indicates convergence at about 38 cm/yr (range: 24 to 60 cm/yr). An alternate interpretation, that emplacement occurred at 30 ± 15 m.y. B.P., would indicate convergence at about 15 cm/yr (range: 9 to 24 cm/yr). The convergence rates obtained in the first case are astonishingly high, and they suggest that perhaps current ideas on the Franciscan should be re-evaluated, with consideration given to the possibility that tectonic mixing continued until the middle or late Tertiary. Even so, the Farallon–North American convergence rate was apparently higher than any convergence rate observed today. This rapid convergence coincides with the Cretaceous rapid spreading pulse, and it may be responsible for such features as the large volumes of Late Cretaceous batholiths and subduction complexes in western North America.