cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Flux phase as possible time-reversal symmetry breaking surface states of high-$T_C$ cuprate superconductors
Creators: name: Kuboki, Kazuhiro
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: At a (110) surface of a $d_{x^2-y-2}$-wave superconductor, superconducting order is strongly suppressed. In such a situation, ordered states that are forbidden in the bulk may arise. This problem is studied for high-$T_C$ cuprate superconductors by treating the $t-J$ model with extended transfer integrals using the Bogoliubov de Gennes method. It is found that a flux phase with staggered currents along the surface, or an antiferromagnetic state can occur near the surface. Stability of the emergent surface states is different from system to system depending on the shapes of their Fermi surfaces. Possible relation to the experiments on the Kerr effect that suggest time-reversal symmetry breaking is discussed.
description: 6 pages, 6 figures
Measuring the economic scope of NPOs in China – 2016 Report
Creators: name: Ma, Qingyu
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: nonprofit organisations
subject: measurement
subject: China
subject: 300 Sozialwissenschaften::300 Sozialwissenschaften, Soziologie::300 Sozialwissenschaften
subject: 300 Sozialwissenschaften::320 Politikwissenschaft::320 Politikwissenschaft
subject: 300 Sozialwissenschaften::320 Politikwissenschaft::322 Beziehungen des Staats zu organisierten Gruppen
subject: 300 Sozialwissenschaften::350 Öffentliche Verwaltung, Militärwissenschaft::351 Öffentliche Verwaltung

description: A project team, made up of scholars and experts from the Chinese Academy of Governance, Central University of Finance and Economics, Beijing Normal University, and Chongqing Academy of Governance, has studied the economic reach of the nonprofit sector in China, in response to calls from peers in the field and entrusted by the Narada Foundation. Under the leadership of Professor Ma Qingyu from the Chinese Academy of Governance, the project team measured the economic scope of China’s nonprofit sector to the end of 2016, using a stratified systematic sampling method.
Incorporating the Hayflick Limit into a model of Telomere Dynamics
Creators: name: Cyrenne, Benoit M.
name: Gooding, R. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: A model of telomere dynamics is proposed and examined. Our model, which extends a previously introduced two-compartment model that incorporates stem cells as progenitors of new cells, imposes the Hayflick Limit, the maximum number of cell divisions that are possible. This new model leads to cell populations for which the average telomere length is not necessarily a monotonically decreasing function of time, in contrast to previously published models. We provide a phase diagram indicating where such results would be expected. In addition, qualitatively different results are obtained for the evolution of the total cell population. Last, in comparison to available leukocyte baboon data, this new model is shown to provide a better fit to biological data.
title: No words for feelings? Not only for my own
title: Diminished emotional empathic ability in Alexithymia
titleType: Subtitle
Creators: name: Härtwig, Elif Alkan
name: Aust, Sabine
name: Heekeren, Hauke R.
name: Heuser, Isabella
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: alexithymia
subject: emotional empathy
subject: cognitive empathy
subject: Subjective arousal
subject: vlPFC
subject: ventrolateral prefrontal cortex.
subject: IFG = inferior frontal gyrus
subject: Skin conductace
subject: 100 Philosophie und Psychologie::150 Psychologie::150 Psychologie

description: The present study has been designed to disentangle cognitive and emotional dimensions of empathy in a group of mentally healthy and highly alexithymic individuals (ALEX, n=24) and well-matched controls (n=26) with Interpersonal Reactivity Index (IRI) as questionnaire measure, and Multi Faceted Empathy Task (MET) used during the fMRI and after the fMRI. Simultaneously, Skin Conductance Response (SCR) has been acquired as an implicit measure of emotional reaction. Results show an impaired emotional empathic ability in alexithymic individuals, with lower levels of SCR and higher activation in prefrontal brain regions such as VLPFC and IFG. Cognitive empathy was not impaired in the alexithymic group and the results were accompanied by a higher activation left-IFG. The study leads to the conclusion that alexithymia doesn't only involve a diminished ability to identify and describe one’s own emotions. Furthermore, it is related to a deeper disability of emotion regulation, which becomes visible in impaired emotional concern for others and higher levels of personal distress.
Golden geese or white elephants? The paradoxes of world heritage sites and community-based tourism development in Agra, India
Creators: name: Chakravarty, Surajit
name: Irazabal Zurita, Clara E.
Publisher: name: Columbia University
Year: 2011
Subjects: City planning
Recreation
Cultural property--Protection

description: This study examines the relationship between World Heritage Sites (WHSs) and local community development in Agra, India. We investigate two interrelated themes: the role of planning in developing the tourism potential of the Taj Mahal and other WHSs in Agra, and the impact of the WHS framework on the development of the city. We analyze the weaknesses of the institutions and agencies responsible for Agra's inability to convert the development potential created by its three WHSs into significant economic, community and infrastructure improvements. The Agra case reveals a set of developmental paradoxes, whereby the restructuring of the tourist industry induced by the designation of WHSs does not lead to proportionate advances in local community development. Several factors were found to be systemic problems, but some recent schemes are worth supporting and expanding. The paradoxes and potential of economic, tourism, and community development in Agra echo those of other developing localities which host WHSs around the world. Following an assessment of problems and challenges, a set of recommendations is directed toward the development of pro-poor, community-based heritage tourism with the aim of informing integrated planning for the community and for heritage and tourism resources in the future.
Blood-brain barrier protein claudin-5 expressed in paired Xenopus laevis oocytes mediates cell-cell interaction
Creators: name: Brunner, Nora
name: Stein, Laura
name: Cornelius, Valeria
name: Knittel, Ria
name: Fallier-Becker, Petra
name: Amasheh, Salah
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: tight junction
subject: Claudins
subject: blood-brain-barrier
subject: Sodium caprate
subject: Xenopus laevis
subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::632 Schäden, Krankheiten, Schädlinge an Pflanzen

description: Claudin-5 determines the sealing properties of blood-brain barrier tight junctions and its function is impaired in neurodegenerative and neuroinflammatory disorders. Focusing on the contribution of claudin-5 to the trans-interaction within the tight junction seal, we used Xenopus laevis oocytes as an expression system. Cells were clustered and challenged in a novel approach for the analysis of claudin interaction. We evaluated the strengthening effect of claudin-5 to cell-cell-connection in comparison to claudin-3. Application of a hydrostatic pressure impulse on clustered control oocyte pairs revealed a reduction of contact areas. In contrast, combinations with both oocytes expressing claudins maintained an enhanced connection between the cells (cldn5–cldn5, cldn3–cldn3). Strength of interaction was increased by both claudin-3 and claudin-5. This novel approach allowed an analysis of single claudins contributing to tight junction integrity, characterizing homophilic and hetrophilic trans-interaction of claudins. To test a new screening approach for barrier effectors, exemplarily, this 2-cell model of oocytes was used to analyze the effect of the absorption enhancer sodium caprate on the oocyte pairs.
Smith, Douglas: my armed forces recollections (December 4, 1972)
Creators: name: :Unav
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Military history
valueUri: http://id.worldcat.org/fast/1021222
subject: Personal narratives--Canadian
valueUri: http://id.worldcat.org/fast/1424090
subject: Pearkes, G. R. (George Randolph), 1888-1984
valueUri: http://id.worldcat.org/fast/1970190

description: An interview/narrative of Air Vice-Marshal Douglas Smith's recollections of Major-General Pearkes and the Avro Arrow. Interview took place on December 4, 1972.
description: ABSTRACT: Air Vice-Marshal Douglas Smith, 4 December 1972. 21pp. The Avro Arrow. The requirement for that type of aircraft. Blames the Air Force for so strongly advocating an aircraft that the country could not afford. Canadian air defence. The Arrow cancellation.
description: Interviewer: Roy, Reginald H.
description: Rank: Air Vice-Marshal. Medals and Honours: Order of the British Empire (CBE)
description: Interviewee: Smith, Douglas
What is the role for conservation organizations in poverty alleviation in the world’s wild places?
Creators: name: Redford, Kent H.
name: Levy, Marc A.
name: Sanderson, Eric W.
name: De Sherbinin, Alexander M.
Publisher: name: Columbia University
Year: 2008
Subjects: Environmental justice
Geography
Wildlife conservation

description: In this paper we provide an empirically-based way to address the general question of the broad-scale spatial relationship between poverty occurrence and areas of interest to those seeking conservation of large wild areas. We address the question of the spatial relationship between poor people and areas less impacted by human activity by asking three questions about the global spatial relationship between poor people and ecological intactness and how it varies by major biome and geographical region. We use infant mortality rate as a proxy for poverty and the Human Footprint as a proxy for ecological intactness, comparing global terrestrial maps of both. The analysis shows that the vast majority of the world’s poor people live in extremely urban and very transformed (peri transformed) areas. Only a small percentage of the world’s most poor are found in areas that are somewhat or extremely wild: about 0.25% of the world’s population. This fact has implications for the calls being made for conservation organizations to undertake poverty alleviation, suggesting that at a global scale those groups with interest in conserving wild areas would be able to contribute little to globally significant poverty alleviation efforts. However, these conservation groups are well positioned to develop new partnerships for delivery of benefits to some of the least accessible poor people in the wildest places of the world.
Anthropogenic Drivers of Ecosystem Change: an Overview
Creators: name: Nelson, Gerald C.
name: Bennett, Elena
name: Berhe, Asmeret A.
name: Cassman, Kenneth
name: DeFries, Ruth S.
name: Dietz, Thomas
name: Dobermann, Achim
name: Dobson, Andrew
name: Janetos, Anthony
name: Levy, Marc A.
name: Marco, Diana
name: Nakicenovic, Nebojsa
name: O'Neill, Brian
name: Norgaard, Richard
name: Petschel-Held, Gerhard
name: Ojima, Dennis
name: Pingali, Prabhu
name: Watson, Robert
name: Zurek, Monika
Publisher: name: Columbia University
Year: 2006
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: This paper provides an overview of what the Millennium Ecosystem Assessment (MA) calls “indirect and direct drivers” of change in ecosystem services at a global level. The MA definition of a driver is any natural or human-induced factor that directly or indirectly causes a change in an ecosystem. A direct driver unequivocally influences ecosystem processes. An indirect driver operates more diffusely by altering one or more direct drivers. Global driving forces are categorized as demographic, economic, sociopolitical, cultural and religious, scientific and technological, and physical and biological. Drivers in all categories other than physical and biological are considered indirect. Important direct drivers include changes in climate, plant nutrient use, land conversion, and diseases and invasive species. This paper does not discuss natural drivers such as climate variability, extreme weather events, or volcanic eruptions.
A RAVE Investigation on Galactic open Clusters I. Radial velocities and metallicities
Creators: name: Conrad, C.
name: Scholz, R. -D.
name: Kharchenko, N. V.
name: Piskunov, A. E.
name: Schilbach, E.
name: Röser, S.
name: Boeche, C.
name: Kordopatis, G.
name: Siebert, A.
name: Williams, M.
name: Munari, U.
name: Matijevič, G.
name: Grebel, E. K.
name: Zwitter, T.
name: de Jong, R. S.
name: Steinmetz, M.
name: Gilmore, G.
name: Seabroke, G.
name: Freeman, K.
name: Navarro, J. F.
name: Parker, Q.
name: Reid, W.
name: Watson, F.
name: Gibson, B. K.
name: Bienaymé, O.
name: Wyse, R.
name: Bland-Hawthorn, J.
name: Siviero, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Context. Galactic open clusters (OCs) mainly belong to the young stellar population in the Milky Way disk, but are there groups and complexes of OCs that possibly define an additional level in hierarchical star formation? Current compilations are too incomplete to address this question, especially regarding radial velocities (RVs) and metallicities ($[M/H]$). Aims. Here we provide and discuss newly obtained RV and $[M/H]$ data, which will enable us to reinvestigate potential groupings of open clusters and associations. Methods.We extracted additional RVs and $[M/H]$ from the RAdial Velocity Experiment (RAVE) via a cross-match with the Catalogue of Stars in Open Cluster Areas (CSOCA). For the identified OCs in RAVE we derived RV and $[M/H]$ from a cleaned working sample and compared the results with previous findings. Results. Although our RAVE sample does not show the same accuracy as the entire survey, we were able to derive reliable RV for 110 Galactic open clusters. For 37 OCs we publish RV for the first time. Moreover, we determined $[M/H]$ for 81 open clusters, extending the number of OCs with $[M/H]$ by 69.
description: 21 pages, 9 Tables, 21 Figures
Assessment of Select Climate Change Impacts on U.S. National Security
Creators: name: Levy, Marc A.
name: Anderson, Bridget
name: Brickman, Melanie
name: Cromer, Chris
name: Falk, Brian
name: Fekete, Balazs
name: Green, Pamela
name: Jaiteh, Malanding S.
name: Lammers, Richard
name: Mara, Valentina
name: MacManus, Kytt
name: Metzler, Steve
name: Muñiz, Maria
name: Parris, Thomas
name: Pullen, Randy
name: Thorkelson, Catherine
name: Vorosmarty, Charles
name: Wollheim, Wil
name: Xing, Xiaoshi
name: Yetman, Gregory G.
Publisher: name: Columbia University
Year: 2008
Subjects: National security--Environmental aspects
Climatic changes

description: This report examines climate change impacts to U.S. national security by quantifying select impacts globally at the national level and identifying countries that are both at high risk from projected climate change and possess risk factors associated with political instability. Exposure to global sea‐level rise risk exposure is quantified by identifying low‐elevation coastal zones (LECZ), at 1, 3, 5, 7, 9, 10 and 12 meters of elevation. Countries with high risk factors for instability that also have the most people exposed to sea‐level rise include China, Philippines, India, and Indonesia. Those with the greatest percentage of population so exposed include Philippines, Egypt, and Indonesia. Within these countries, Egypt has especially high rates of population growth within the LECZ. Aggregate climate change vulnerability is quantified by using an index that takes into account both projected temperature change and adaptive capacity. For countries with high risk factors for instability, the most vulnerable countries are South Africa, Nepal, Morocco, Bangladesh, Tunisia, Paraguay, Yemen, Sudan and Côte d’Ivoire. Water scarcity is examined by comparing numbers of people living under conditions of water in the present with three future scenarios – one in which the climate remains unchanged but population changes; one in which population changes but the climate remains static; and one in which both population and climate change. Countries with high risk factors for instability that are projected to have the biggest increases in water scarcity are Mozambique, Côte d’Ivoire, Nigeria, Iraq, Guatemala, Zimbabwe, Ethiopia, Somalia, China, Syria and Algeria.
ARS3D: Close to the Original-Erfassung archäologischer Objekte und ihre webbasierte semantisch modellierte Bereitstellung zur fachwissenschaftlichen Analyse
Creators: name: Thiery, Florian
name: Raddatz, Laura
name: Boochs, Frank
Publisher: name: Zenodo
Year: 2022
Subjects: Kulturerbe
3D
Linked Open Data
African Red Slip Ware

description: Das Potential und der Nutzen moderner 3D Messverfahren zur Digitalisierung archäologischer Objekte sind unbestritten. Entsprechend werden sie inzwischen aktiv in vielfältiger Weise zur Dokumentation eingesetzt. Infolge des breiten Merkmalsspektrums von Messverfahren gibt es dabei fallbezogen einen engen Zusammenhang zwischen Methodik und Eignung zur Bedienung bestimmter fachwissenschaftlicher Fragestellungen. Geht es um eine dem Original möglichst nahe kommende Digitalisierung sind entsprechend hohe Anforderungen der Methodik zur Erfassung von Geometrie und Erscheinungsbild zu erfüllen. Derart hochwertig erfasste Objekte haben das Potential, das Original in der digitalen archäologischen Forschung inhaltlich und geometrisch zu ergänzen und durch den digitalen Charakter in unbegrenzter und offenzugänglicher Form Fachanwendern im Web zur Verfügung zu stellen. Hierzu werden webbasierte Werkzeuge zur Interaktion und Visualisierung benötigt, die Anwender*innen bei Interpretationsarbeit unterstützen. Archäologische Forschung benötigt jedoch auch fachliche Informationen (z.B. Material, Fundort, Zeitperiode, Typologie- und Ikonografieverweise), die in den Interpretationsprozess einfließen. Entsprechend sollten diese nach aktuellen Standards in den Cultural Heritage (z.B. CIDOC CRM, Thesauri und Normdaten wie Getty AAT, IconClass, Wikidata, ChronOntology) erfasst und möglichst nach FAIR[1]- und Linked Open Data Prinzipien[2] verfügbar gemacht werden. Somit beinhaltet eine offene, nachvollziehbare und transparente Bereitstellung der Daten semantische Strukturierung archäologischer Fachinformationen, sowie die Verknüpfung und Modellierung von Beobachtungen und Interpretationen. Im Sinne einer nachhaltigen und übertragbaren Vorgehensweise sind dabei existierende Standards in der Cultural Heritage- und Semantic Web Domain, wie CIDOC-CRM[3] oder PROV-O[4], und neue community-driven Vorschläge (z.B. Ontologie zu 3D Metadaten) zu berücksichtigen. All diese Aspekte waren Gegenstand des vom BMBF geförderten Forschungsprojektes "African Red Slip Ware digital", das sich mit einer speziellen Gattung römischer Keramik - African Red Slip Ware - befasste. Dieses Paper zeigt Ergebnisse und Best-Practices aus dem ASR3D-Projekt bezüglich der 3D-Messverfahren und Metadatenmodellierung[5], sowie der semantischen Fachdatenmodellierung[6], fachlichen Analyse[7] und Datenvisualisierung[8] und Datenbereitstellung[9]. Referenzen [1] https://doi.org/10.1038/sdata.2016.18 [2] https://www.w3.org/DesignIssues/LinkedData.html [3] https://cidoc-crm.org [4] https://www.w3.org/TR/prov-o/ [5] https://doi.org/10.1186/s40494-021-00561-w [6] https://doi.org/10.5281/zenodo.5642891 [7] https://doi.org/10.5281/zenodo.5646897 [8] http://ars3d.rgzm.de [9] https://doi.org/10.5281/zenodo.5722941
Organic thermal maturity as a proxy for frictional fault heating: Experimental constraints on methylphenanthrene kinetics at earthquake timescales
Creators: name: Sheppard, Rachel E.
name: Polissar, Pratigya Jeremy
name: Savage, Heather Moore
Publisher: name: Columbia University
Year: 2014
Subjects: subject: Heat--Experiments
subject: Rocks
subject: Rock mechanics
subject: Biochemical markers
subject: Plate tectonics
subject: Geochemistry
subject: FOS: Earth and related environmental sciences

description: Biomarker thermal maturity is widely used to study burial heating of sediments over millions of years. Heating over short timescales such as during earthquakes should also result in measurable increases in biomarker thermal maturity. However, the sensitivity of biomarker thermal maturity reactions to short, higher-temperature heating has not been established. We report on hydrous pyrolysis experiments that determine the kinetic parameters of methylphenanthrene maturation at timescales and temperatures relevant to earthquake heating. Samples of Woodford Shale were heated at temperatures up to 343 °C over 15–150 min. The thermal maturity of the samples as measured by the methylphenanthrene index-1 (MPI-1) increased with heating time and temperature. We find that MPI-1 increases with time and temperature consistent with a first-order kinetic model and Arrhenius temperature relationship. Over the timescales tested here, MPI-1 is strongly affected by maximum temperature and less sensitive to heating duration. Production of new phenanthrene isomers and expulsion of a liquid pyrolyzate also occurred. Differential expulsion of methylphenanthrene isomers affected the apparent maturity of the rock at lower temperatures and may need to be considered for organic-rich fault rocks. Our results demonstrate that the overall MPI-1 reaction extent in both the rock and pyrolyzate are a useful measure of thermal maturity and reflect temperature history during rapid heating.
Contiguity, Tea Cups from Conversations in Wonderland (The Researcher Tea Party) Folded & woven selection of academic papers/tea chest, PhD 2014-2016
Creators: name: COLEMAN, KATHRYN
Publisher: name: The University of Melbourne
Year: 2025
Subjects: classificationCode: 390306
subject: Secondary education
classificationCode: 360602
subject: Fine arts
classificationCode: 390307
subject: Teacher education and professional development of educators
classificationCode: 390101
subject: Creative arts, media and communication curriculum and pedagogy

description: This non-traditional research output was created as part of PhD (50/50) creative work and thesis knowledge contribution (Coleman, 2017). These tea cups are works that form part of a digital PhD Thesis and a/r/tographic study. It was a multimodal living inquiry, curated as a digital collection of images, essays and ethnographic video, and situated within embodied praxis completed between 2014 and 2016. The findings from the inquiry inform our understanding of the complex yet commensurate building of identities in art education. These works were forma part of a larger work called Conversations in Wonderland (The Researcher Tea Party). It includes folded & woven paper selected from academic and scholarly materials and wooden tea chest. Situated within a/r/tographic inquiry and embodied research, this study addressed rhizomatic learning in art education and in arts based educational research and literature, specifically how important an understanding of creativity and creative practice are for students as art makers and responders to art, as makers, historians, theorists and critics. While art and art education are commonly discussed as creative, promoted as important aspects of cultural thinking, values collaboration, creativity and problem solving in schools, few studies have designed a personalised learning space to inform these practices and explore them from the artist-researcher-teacher viewpoint.Coleman, K.S. (2017). An a/r/tist in wonderland: Exploring identity, creativity and digital portfolios as a/r/tographer, Ph.D. dissertation, Melbourne Graduate School of Education, University of Melbourne, Australia, 2017. Retrieved from http://www.artographicexplorations.com
The clustering of baryonic matter. I: a halo-model approach
Creators: name: Fedeli, Cosimo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this paper I generalize the halo model for the clustering of dark matter in order to produce the power spectra of the two main baryonic matter components in the Universe: stars and hot gas. As a natural extension, this can be also used to describe the clustering of all mass. According to the design of the halo model, the large-scale power spectra of the various matter components are physically connected with the distribution of each component within bound structures and thus, ultimately, with the complete set of physical processes that drive the formation of galaxies and galaxy clusters. Besides being practical for cosmological and parametric studies, the semi-analytic model presented here has also other advantages. Most importantly, it allows one to understand on physical ground what is the relative contribution of each matter component to the total clustering of mass as a function of scale, and thus it opens an interesting new window to infer the distribution of baryons through high precision cosmic shear measurements. This is particularly relevant for future wide-field photometric surveys such as Euclid. In this work the concept of the model and its uncertainties are illustrated in detail, while in a companion paper we use a set of numerical hydrodynamic simulations to show a practical application and to investigate where the model itself needs to be improved.
description: 25 pages, 9 figures. Accepted for publication by JCAP
Some topics on time series analysis
Creators: name: Liu, Chuan
Publisher: name: No Publisher Supplied
Year: 2020

description: This thesis deals with three problems. The first problem is concerned with the classical white noise test, and the second is on the estimation of autoregressive models for matrix-valued time series. These two time series problems are treated in Chapter 2 and 3. The third problem, on the construction of exact algorithm for the linear constrained LASSO, is treated in Chapter 4.In Chapter 2, we study the asymptotic distribution of sample canonical correlations under different distributional assumptions of the time series. The joint density of the asymptotic distribution is derived explicitly for the normal and elliptical distributions. For the general non-normal case, we propose to bootstrap the canonical correlations to obtain the p-value. We carry out an extensive simulation study to illustrate the size and power performances of the proposed tests.In Chapter 3, we propose a novel estimator of the matrix autoregressive model, based on the weighted least squares. We derive the asymptotic distributions of the estimator, and demonstrate its performance by simulations and real examples.Chapter 4 deals with the exact algorithm of the constrained LASSO problem. We develop such an exact algorithm by exploring the geometric properties of the problem. We prove that the solution path of the problem is piece-wise linear. We also prove an exponential upper bound for the complexity of the constrained LASSO problem.
Human adaptation strategies to abrupt climate change in Puerto Rico ca. 3.5 ka
Creators: name: Rivera-Collazo, Isabel
name: Winter, Amos
name: Scholz, Denis
name: Mangini, Augusto
name: Miller, Thomas
name: Kushnir, Yochanan
name: Black, David
Publisher: name: Columbia University
Year: 2015
Subjects: subject: Paleoclimatology
subject: Anthropology
subject: FOS: Sociology
subject: Climatic changes
subject: Archaeology

description: The connection between climatic change and social response is complex because change articulates a number of inter-related factors. Human decisions are filtered by social buffers – including social memory, risk perception, and cultural priorities – and the rate and scale of climate change is usually much larger than the scale of human decision-making. In this article, we provide information on climate change based on precisely dated speleothems with the response evident in archaeological sites that have radiocarbon date ranges within the same time frame. A stalagmite recovered from within the catchment area for aquifer recharge of the Pre-Arawak site of Angostura in Barceloneta, Puerto Rico, shows that a significant wet period occurred between 3.9 and 3.1 ka (primarily centered at 3.5 ka). We investigate the effect that this increase in precipitation had on the earliest occupations on the island in the context of palaeoenvironmental, geoarchaeological, and archaeological records from Angostura, Maruca, and Paso del Indio. Our analysis suggests the presence of two different adaptation strategies: settlement relocation and microlandscape modification. Our study concludes that the social response to change cannot be seen as monolithic given that human behavior, even within the same period, addresses the needs of individual groups with different priorities. This multiplicity of responses can indeed enhance resilience as social support can continue through alliances and exchanges, strengthening social bonds that can help buffer catastrophes. The results can help shed light on the range of adaptation strategies to change encompassed within the manifestations of social resilience or vulnerability.
Obtaining Steady High-Voltage Direct Current from a Thermionic Rectifier, Without a Filter
Creators: name: Maxstadt, Francis William
Publisher: name: California Institute of Technology
Year: 1925
Subjects: Electrical Engineering
General Course

description: The usual polyphase high-voltage rectifier produces a potential essentially constant out having superposed on it a "ripple" or alternating component whose amplitude on each side of the mean is from five to seven per cent of the total d-c. voltage. Condensers and reactors are used to filter the ripple out. The paper describes a special type of a-c. generator which will give the proper low-voltage wave form for rectification as a more nearly smooth direct potential. A method of manually or automatically varying the low-voltage wave form according to load demands is provided so as to keep the rectified potential steady, thus avoiding the necessity for the filter which in sets for 100,000 volts or more would be quite expensive and troublesome.
title: Acoustic ecology as therapy?
Creators: name: Rossiter, Louise
Publisher: name: Strathprints - University of Strathclyde
Year: 2011

description: As a musician, I have been interested in the potential effects and benefits of music as a therapeutic tool. I have also been in a fortunate position to experience the deployment of music as a 'hands on' tool to interact with children and young people within both communities and residential care settings.
Mid-ocean ridge eruptions as a climate valve
Creators: name: Tolstoy, Maya
Publisher: name: Columbia University
Year: 2015
Subjects: subject: Sea-floor spreading
subject: Submarine volcanoes
subject: Paleoclimatology
subject: Plate tectonics
subject: Oceanography
subject: FOS: Earth and related environmental sciences
subject: Geophysics
subject: Submarine geology

description: Seafloor eruption rates and mantle melting fueling eruptions may be influenced by sea level and crustal loading cycles at scales from fortnightly to 100 kyr. Recent mid-ocean ridge eruptions occur primarily during neap tides and the first 6 months of the year, suggesting sensitivity to minor changes in tidal forcing and orbital eccentricity. An ~100 kyr periodicity in fast-spreading seafloor bathymetry and relatively low present-day eruption rates at a time of high sea level and decreasing orbital eccentricity suggest a longer-term sensitivity to sea level and orbital variations associated with Milankovitch cycles. Seafloor spreading is considered a small but steady contributor of CO2 to climate cycles on the 100 kyr time scale; however, this assumes a consistent short-term eruption rate. Pulsing of seafloor volcanic activity may feed back into climate cycles, possibly contributing to glacial/interglacial cycles, the abrupt end of ice ages, and dominance of the 100 kyr cycle.
Stratified-algebraic vector bundles
Creators: name: Kucharz, Wojciech
name: Kurdyka, Krzysztof
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14P25, 14P99, 14F25, 19A49

description: We investigate stratified-algebraic vector bundles on a real algebraic variety X. A stratification of X is a finite collection of pairwise disjoint, Zariski locally closed subvarieties whose union is X. A topological vector bundle on X is called a stratified-algebraic vector bundle if, roughly speaking, there exists a stratification of X such that the restriction of the bundle to each stratum is an algebraic vector bundle. In particular, every algebraic vector bundle on X is stratified-algebraic. It turns out that stratified-algebraic vector bundles have many surprising properties, which distinguish them from algebraic and topological vector bundles.
On the monodromy of Milnor fibers of hyperplane arrangements
Creators: name: Bailet, Pauline
Publisher: name: arXiv
Year: 2014
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We describe a general setting where the monodromy action on the first cohomology group of the Milnor fiber of a hyperplane arrangement is the identity.
description: 10 pages
Similarity of organized patterns in driving and basal stresses of Antarctic and Greenland ice sheets beneath extensive areas of basal sliding
Creators: name: Sergienko, O. V.
name: Creyts, Timothy T.
name: Hindmarsh, R. C. A.
Publisher: name: Columbia University
Year: 2014
Subjects: subject: Ice mechanics
subject: Ice sheets
subject: Geophysics
subject: FOS: Earth and related environmental sciences
subject: Physical geography

description: The rate of ice transport from the interior of ice sheets to their margins, and hence the rate with which it contributes to sea level, is determined by the balance of driving stress, basal resistance, and ice internal deformation. Using recent high-resolution observations of the Antarctic and Greenland ice sheets, we compute driving stress and ice deformation velocities, inferring basal traction by inverse techniques. The results reveal broad-scale organization in 5–20 km band-like patterns in both the driving and basal shear stresses located in zones with substantial basal sliding. Both ice sheets experience basal sliding over areas substantially larger than previously recognized. The likely cause of the spatial patterns is the development of a band-like structure in the basal shear stress distribution that is the results of pattern-forming instabilities related to subglacial water. The similarity of patterns on the Greenland and Antarctic ice sheets suggests that the flow of ice sheets is controlled by the same fundamental processes operating at their base, which control ice sheet sliding and are highly variable on relatively short spatial and temporal scales, with poor predictability. This has far-reaching implications for understanding of the current and projection of the future ice sheets' evolution.
Urbanization causes increased cloud base height and decreased fog in coastal Southern California
Creators: name: Williams, A. Park
name: Schwartz, Rachel E.
name: Iacobellis, Sam
name: Seager, Richard
name: Cook, Benjamin I.
name: Still, Christopher J.
name: Husak, Gregory
name: Michaelson, Joel
Publisher: name: Columbia University
Year: 2015
Subjects: Urbanization--Environmental aspects
Urban heat island
Clouds
Climatic changes
Environmental sciences
Atmosphere
Meteorology

description: Subtropical marine stratus clouds regulate coastal and global climate, but future trends in these clouds are uncertain. In coastal Southern California (CSCA), interannual variations in summer stratus cloud occurrence are spatially coherent across 24 airfields and dictated by positive relationships with stability above the marine boundary layer (MBL) and MBL height. Trends, however, have been spatially variable since records began in the mid-1900s due to differences in nighttime warming. Among CSCA airfields, differences in nighttime warming, but not daytime warming, are strongly and positively related to fraction of nearby urban cover, consistent with an urban heat island effect. Nighttime warming raises the near-surface dew point depression, which lifts the altitude of condensation and cloud base height, thereby reducing fog frequency. Continued urban warming, rising cloud base heights, and associated effects on energy and water balance would profoundly impact ecological and human systems in highly populated and ecologically diverse CSCA.
Low-Cost Aquifer Storage and Recovery: Implications for Improving Drinking Water Access for Rural Communities in Coastal Bangladesh
Creators: name: Sultana, S.
name: Ahmed, K. M.
name: Mahtab-Ul-Alam, S. M.
name: Hasan, M.
name: Tuinhof, A.
name: Ghosh, S. K.
name: Rahman, M. S.
name: Zheng, Yan
name: Ravenscroft, P.
Publisher: name: Columbia University
Year: 2014
Subjects: subject: Aquifer storage recovery
subject: Water quality management
subject: Water supply engineering
subject: Water
subject: Civil engineering
subject: FOS: Civil engineering
subject: Water resources development--Management
subject: Regional planning

description: Fresh water resources are scarce in rural communities in the southern deltaic plains of Bangladesh where both shallow and deep groundwater is frequently brackish, and fresh water ponds have been increasingly salinized by inundation during storm surges and brackish-water aquaculture. Low-cost aquifer storage and recovery (ASR) schemes were constructed at 13 villages in three coastal districts by developing storage in shallow confined fine to medium sand aquifers overlain by variable thicknesses of silt and clay. A typical ASR scheme consisted of a double-chambered graded sand filtration tank with a volume of 19.5 m3 that feeds filtered pond water to four to six large diameter (d=30.5 or 56 cm) infiltration wells through PVC pipes fitted with stop valves and flow meters. The infiltration wells were completed at 18–31 m below ground and filled with well-sorted gravel capped with a thin layer of fine sand that acts as a second stage filter. Infiltration rates at 13 sites averaged 3 m3/day (range: 3–6 m3/day) over one year of operation. At 11 sites where water was abstracted, the recovery rate ranged from 5 to 40%. The source pond source water frequently had turbidity values of ≥100 NTU. After sand filtration, the turbidity is typically 5 NTU. Despite this, clogging management involving frequent (monthly to weekly) manual washing to remove fine materials deposited in the sand filtration tank and the infiltration wells is found to be necessary and effective, with post-manual-washing operational infiltration rates restored to annual average values. E. coli counts in recovered water are greatly reduced compared to raw pond water, although E. coli is still detected in about half of the samples. Arsenic in recovered water was detected to be at level of > 100 μg/L repeatedly at three sites, suggesting that As risks must be carefully managed and require further investigation.
Linking cross-cultural communication to work engagement and creativity: what you ruminate matters
Creators: name: Liu, Cheng-Huan
Publisher: name: No Publisher Supplied
Year: 2020

description: This study integrates Job Demands-Resource (JD-R) and Effort-Recovery theories to develop a model in which quality of cross-cultural communication experiences predict employee’s creativity and work engagement through work-related rumination. To begin, I conceptualize cross-cultural communication experience as a job demand. I then suggest two different types of work-related rumination, affective and problem-solving rumination, as the linking mechanism between cross-cultural communication experience and creativity as well as work engagement. I also examine the moderating effect of individual cultural intelligence in the relationship between cross-cultural communication experiences and rumination. By examining the effect of daily quality of cross-cultural communication on work outcomes, this study extends the extant literature on crosscultural interactions. Importantly, this study contributes to the cultural diversity field by identifying work-related rumination as a process mediator to explain the cross-cultural interactions and creativity relationship at the individual level.
Sedimentation of a two-dimensional colloidal mixture exhibiting liquid-liquid and gas-liquid phase separation: a dynamical density functional theory study
Creators: name: Malijevsky, Alexandr
name: Archer, Andrew J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present dynamical density functional theory results for the time evolution of the density distribution of a sedimenting model two-dimensional binary mixture of colloids. The interplay between the bulk phase behaviour of the mixture, its interfacial properties at the confining walls, and the gravitational field gives rise to a rich variety of equilibrium and non-equilibrium morphologies. In the fluid state, the system exhibits both liquid-liquid and gas-liquid phase separation. As the system sediments, the phase separation significantly affects the dynamics and we explore situations where the final state is a coexistence of up to three different phases. Solving the dynamical equations in two-dimensions, we find that in certain situations the final density profiles of the two species have a symmetry that is different from that of the external potentials, which is perhaps surprising, given the statistical mechanics origin of the theory. The paper concludes with a discussion on this.
N and $Δ$ hidden-charm resonances with heavy-quark spin symmetry
Creators: name: Romanets, Olena
name: Garcia-Recio, Carmen
name: Salcedo, Lorenzo Luis
name: Nieves, Juan
name: Tolos, Laura
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study N and $Δ$ hidden-charm baryon resonances that are generated dynamically from the s-wave interaction of pseudoscalar and vector mesons with $1/2^+$ and $3/2^+$ baryons. We use a unitary coupled-channels model that fulfills heavy-quark spin symmetry and respects spin-flavor symmetry in the light sector. We predict seven N-like and five $Δ$-like states with masses around 4 GeV, most of them as bound states. Some of these states form heavy-quark spin multiplets, which are almost degenerate in mass.
description: 4 pages; proceedings of The 9th International Workshop on the Physics of Excited Nucleons (NSTAR 2013), Peniscola, Spain, May 27-30, 2013
John Gibson, Designer: Sculpture and Reproductive Media in the Nineteenth Century
Creators: name: Ferrari, Roberto C.
Publisher: name: Columbia University
Year: 2015
Subjects: Decoration and ornament
Sculpture
Art

description: This article discusses the British sculptor John Gibson (1790-1866), whose studio in Rome was one of the most popular for those on the Grand Tour. He disseminated his interest in classicism through his many marble sculptures inspired by ancient Greek art, such as "Cupid Disguised as a Shepherd Boy," which was reproduced in lifesize marble at least nine times during his lifetime. But Gibson also utilized new technologies to spread his interest in disegno, allowing his designs to be reproduced by others as Parian porcelain statuettes, cameos, and prints. This redefinition from sculptor to designer culminated in a number of award-winning designs exhibited in his name at the Great Exhibition of 1851.
Marine life under unprecedented pressure (Policy Briefing 3 December 2020)
Creators: name: Meller, Laura
Publisher: name: Zenodo
Year: 2020

description: Presentation by Laura Meller, held at the policy briefing on "Forecasting fish distribution and abundance in the Atlantic Ocean: The challenge of balancing exploitation and sustainability" on 3 December 2020- The full briefing document is available here: https://zenodo.org/record/4289935
Portraits, Landscapes, and Genre Scenes: New Discoveries in the 19th-Century Paintings Collection at Columbia University
Creators: name: Ferrari, Roberto C.
Publisher: name: Columbia University
Year: 2015
Subjects: Painting
Nineteenth century
Art in education
Art

description: This article discusses three nineteenth-century paintings from the Columbia University art collection, stewarded by Art Properties, Avery Architectural & Fine Arts Library: a portrait of Lord Byron by an unknown British artist after George Sanders; "The Sandpits near Valmondois (Les Sablières près Valmondois)" by the French artist Charles-François Daubigny; and "Military Scene" by the German artist Christian Sell.
Number-conserving approaches to $n$-component Bose-Einstein condensates
Creators: name: Mason, Peter
name: Gardiner, Simon
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We develop the number-conserving approach that has previously been used in a single component Bose-Einstein condensed dilute atomic gas, to describe consistent coupled condensate and noncondensate number dynamics, to an $n$-component condensate. The resulting system of equations comprises, for each component, of a generalised Gross-Pitaevskii equation coupled to modified Bogoliubov-de Gennes equations. Lower-order approximations yield general formulations for multi-component Gross-Pitaevskii equations, and systems of multi-component Gross-Pitaevskii equations coupled to multi-component modified number-conserving Bogoliubov-de Gennes equations. The analysis is left general, such that, in the $n$-component condensate, there may or may not be mutually coherent components. An expansion in powers of the ratio of noncondensate to condensate particle numbers for each coherent set is used to derive the self-consistent, second-order, dynamical equations of motion. The advantage of the analysis developed in this article is in its applications to dynamical instabilities that appear when two (or more) components are in conflict and where a significant noncondensed fraction of atoms is expected to appear.
title: Dyspnea after trauma?
Creators: name: López Beneyto, Jorge
Publisher: name: EURORAD
Year: 2022
Subjects: subject: Chest imaging
subject: Emergency
subject: Trauma
subject: Embolism / Thrombosis
subject: Trauma
subject: Clinical Cases

description: Clinical History: A 61-year-old male with no known past medical history presented to the emergency department after a ground level fall. The patient was admitted for management of his fractures and over the next few hours developed progressively worsening shortness of breath. Upon arrival he was afebrile, normotensive, and had an O2 saturation of 92% on room air. Neurologic evaluation revealed a Glascow Coma Score of 15 and no focal neurologic deficits. Physical examination revealed deformities of his left lower and right upper extremities. 

description: 61 years, male