cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quasi 1D Bose-Einstein condensate flow past a nonlinear barrier
Creators: name: Abdullaev, F. Kh.
name: Galimzyanov, R. M.
name: Ismatullaev, Kh. N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: The problem of a quasi 1D {\it repulsive} BEC flow past through a nonlinear barrier is investigated. Two types of nonlinear barriers are considered, wide and short range ones. Steady state solutions for the BEC moving through a wide repulsive barrier and critical velocities have been found using hydrodynamical approach to the 1D Gross-Pitaevskii equation. It is shown that in contrast to the linear barrier case, for a wide {\it nonlinear} barrier an interval of velocities $0 < v < v_-$ {\it always} exists, where the flow is superfluid regardless of the barrier potential strength. For the case of the $δ$ function-like barrier, below a critical velocity two steady solutions exist, stable and unstable one. An unstable solution is shown to decay into a gray soliton moving upstream and a stable solution. The decay is accompanied by a dispersive shock wave propagating downstream in front of the barrier.
description: 6 pages, 7 figures, extended abstract, revised arguments in Sects 2,3 results unchanged, added references
Rigid Formations with Leader-Follower Architecture
Creators: name: Eren, Tolga
name: Whiteley, Walter
name: Belhumeur, Peter N.
Publisher: name: Columbia University
Year: 2006
Subjects: Computer science

description: This paper is concerned with information structures used in rigid formations of autonomous agents that have leader-follower architecture. The focus of the paper is on sensor/network topologies to secure control of rigidity. This papers extends the previous rigidity based approaches for formations with symmetric neighbor relations to include formations with leader-follower architecture. We provide necessary and sufficient conditions for rigidity of directed formations, with or without cycles. We present the directed Henneberg constructions as a sequential process for all guide rigid digraphs. We refine those results for acyclic formations, where guide rigid formations had a simple construction. The analysis in this paper confirms that acyclicity is not a necessary condition for stable rigidity. The cycles are not the real problem, but rather the lack of guide freedom is the reason behind why cycles have been seen as a problematic topology. Topologies that have cycles within a larger architecture can be stably rigid, and we conjecture that all guide rigid formations are stably rigid for internal control. We analyze how the external control of guide agents can be integrated into stable rigidity of a larger formation. The analysis in the paper also confirms the inconsistencies that result from noisy measurements in redundantly rigid formations. An algorithm given in the paper establishes a sequential way of determining the directions of links from a given undirected rigid formation so that the necessary and sufficient conditions are fulfilled.
A Runtime Adaptation Framework for Native C and Bytecode Applications
Creators: name: Griffith, Rean
name: Kaiser, Gail E.
Publisher: name: Columbia University
Year: 2006
Subjects: Computer science

description: The need for self-healing software to respond with a reactive, proactive or preventative action as a result of changes in its environment has added the non-functional requirement of adaptation to the list of facilities expected in self-managing systems. The adaptations we are concerned with assist with problem detection, diagnosis and remediation. Many existing computing systems do not include such adaptation mechanisms, as a result these systems either need to be re-designed to include them or there needs to be a mechanism for retro-fitting these mechanisms. The purpose of the adaptation mechanisms is to ease the job of the system administrator with respect to managing software systems. This paper introduces Kheiron, a framework for facilitating adaptations in running programs in a variety of execution environments without requiring the redesign of the application. Kheiron manipulates compiled C programs running in an unmanaged execution environment as well as programs running in Microsoft's Common Language Runtime and SunMicrosystems' Java VirtualMachine. We present case-studies and experiments that demonstrate the feasibility of using Kheiron to support self-healing systems. We also describe the concepts and techniques used to retro-fit adaptations onto existing systems in the various execution environments.
Casimir Force for Absorbing Media in an Open Quantum System Framework: Scalar Model
Creators: name: Lombardo, Fernando C.
name: Mazzitelli, Francisco D.
name: Lopez, Adrian E. Rubio
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this article we compute the Casimir force between two finite-width mirrors at finite temperature, working in a simplified model in 1+1 dimensions. The mirrors, considered as dissipative media, are modeled by a continuous set of harmonic oscillators which in turn are coupled to an external environment at thermal equilibrium. The calculation of the Casimir force is performed in the framework of the theory of quantum open systems. It is shown that the Casimir interaction has two different contributions: the usual radiation pressure from vacuum, which is obtained for ideal mirrors without dissipation or losses, and a Langevin force associated with the noise induced by the interaction between dielectric atoms in the slabs and the thermal bath. Both contributions to the Casimir force are needed in order to reproduce the analogous of Lifshitz formula in 1+1 dimensions. We also discuss the relation between the electromagnetic properties of the mirrors and the spectral density of the environment
description: Minor changes, version to appear in Phys. Rev. A
A Family of Window Protocols for Time-Constrained Applications in CSMA Networks
Creators: name: Kurose, James F.
name: Schwartz, Mischa
Publisher: name: Columbia University
Year: 1983
Subjects: Computer science

description: In the design of random access CSMA protocols for time-constrained applications such as packetized voice, the distribution of message waiting times is of critical importance. It is shown that the ordering or scheduling imposed on message transmissions by a particular random access protocol greatly affects the message waiting time distribution. We present a random access protocol which can provide a large class of distributed message scheduling disciplines based on message arrival times. Moreover, this protocol can adaptively vary to provide an optimal service discipline in response to changing system demands. Analytic models are derived for the waiting time distribution for the cases of FCFS, LCFS and RANDOM scheduling and the analytic results are compared with simulation. Other possible scheduling disciplines are discussed and the impact of the distributed scheduling discipline on the performance of time-constrained applications is examined.
Paratrachymyrmex bugnioni Forel 1912
Creators: name: Mera-Rodríguez, Daniela
name: Serna, Francisco
name: Sosa-Calvo, Jeffrey
name: Lattke, John
name: Rabeling, Christian
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Hexapoda
Hymenoptera
Formicidae
Paratrachymyrmex
Paratrachymyrmex bugnioni

description: (37) Paratrachymyrmex bugnioni (Forel, 1912) Figure 9E, FMaterial examined. COLOMBIA: Atlántico • 1 worker; Juan de Acosta; 10°46′02″N, 075°02′34″W; alt. 177–250 m; Aug. 2012; D. Sernaleg.; UNAB 4762. Identification. Frons and vertex strongly longitudinally rugose; apex of antennal scape scarcely surpassing the posterior cephalic corner; constriction of the frontal ca- rina immediately beyond of the frontal lobes is not present; and distance between the frontal carina is half of the maximum width of the head as measured across the eyes (unpublished key by Kempf). Distribution.Paratrachymyrmex bugnioni has been recorded from Mexico (Jalisco) and Guatemala south to Brazil (Amazonas, Goiás, Maranhão, Minas Gerais, Pará, and Roraima) (Kempf 1972; Fernández and Sen- doya 2004; Achury and Suárez 2018; Souza et al. 2018).
description: Published as part of Mera-Rodríguez, Daniela, Serna, Francisco, Sosa-Calvo, Jeffrey, Lattke, John & Rabeling, Christian, 2020, A checklist of the non-leaf-cutting fungus-growing ants (Hymenoptera, Formicidae) from Colombia, with new biogeographic records, pp. 1205-1227 in Check List 16 (5) on page 1221, DOI: 10.15560/16.5.1205, http://zenodo.org/record/4059086
description: {"references": ["Forel A (1912) Formicides neotropiques. Part I. Annales de la Societe Entomologique de Belgique 56: 28 - 49.", "Kempf WW (1972) Catalogo abreviado das formigas da regiao neotro- pical (Hymenoptera: Formicidae). Studia Entomologica 15: 1 - 344.", "Achury R, Suarez AV (2018) Richness and composition of Grounddwelling Ants in tropical rainforest and surrounding landscapes in the Colombian Inter-Andean Valley. Neotropical Entomology 47: 731 - 741. https: // doi. org / 10.1007 / s 13744 - 017 - 0565 - 4", "Souza JLP, Baccaro FB, Pequeno PACL, Franklin E, Magnusson WE (2018) Effectiveness of genera as a higher-taxon substitute for spe- cies in ant biodiversity analyses is not affected by sampling tech- nique. Biodiversity and Conservation 27 (13): 3425 - 3445. https: // doi. org / 10.1007 / s 10531 - 018 - 1607 - x"]}
Modeling construction site productivity using situation-based simulation tool
Creators: name: Choy, Eldon Chiu Yat
Publisher: name: University of Calgary
Year: 2004

description: Bibliography: p. 287-294
description: Both published and unpublished reports show that site productivity losses in construction projects range from 40% to 60%. Productivity improvement is an important and valuable issue to both the industrial and academic area. Construction site operations are very complex, and they involve complicated, relationships among numerous tasks, factors, obstacles, uncertainties, or triggering situations that affect the productivity. Understanding the impact of these triggering situations on productivity would be necessary to improve the performance of the construction operations. This thesis directly investigates and models these triggering situations to predict productivity using a modeling technique called situation-based simulation modeling. This modeling tool can model the cause-and-effect relationships among various triggering situations that previous construction models have ignored. More than 1700 working hours of construction operations were directly observed and recorded as the source data of the development of the model. The simulation results not only are able to predict productivity very closely to the actual productivity observed at the site, but also provide recommendations to mitigate problematic situations to improve productivity.
Selmer Groups and Quadratic Reciprocity
Creators: name: Lemmermeyer, Franz
Publisher: name: arXiv
Year: 2011
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: In this article we study the 2-Selmer groups of number fields $F$ as well as some related groups, and present connections to the quadratic reciprocity law in $F$.
Colorado water, July 1991
Creators: name: Colorado Water Resources Research Institute, Author
Publisher: name: Mountain Scholar
Year: 1991
Subjects: subject: Water resources development -- Colorado
subject: Water-supply -- Colorado
subject: Water use -- Colorado
subject: Water-supply -- Management -- Colorado

description: Includes Colorado Water - International, an addition to the newsletter of an international report.
description: Newsletter of the Colorado Water Resources Research Institute.
Another look at Orientalism : Western literature in the face of Islam
Creators: name: Tastekin, Emel
Publisher: name: University of British Columbia
Year: 2011

description: Another Look at Orientalism seeks to establish a genealogical link between the fields of literary criticism and Islamic studies through a case study of the Qur’anic scholarship of Abraham Geiger (1810-1874). Responding to Edward Said’s thesis in Orientalism (1978), which polemically subordinates all Orientalist scholarship of the nineteenth century to some form of imperialist motive, this dissertation argues that Geiger, as a member of the Jewish diaspora in a German-speaking land, reacted against the Christian bias in the philological scholarship of his time by highlighting the heading “Abrahamic” in his work Was hat Mohammed aus dem Judenthume aufgenommen? (1833). I see Geiger’s work as one of the first attempts to critique the internal imperialism of Western/European culture and, as such, a precursor of comparative and postcolonial literary studies of the twentieth century. From a theoretical angle, I combine Jacques Derrida’s philosophy, particularly on “Abrahamic hospitality” and “exemplarity,” with perspectives drawn from diaspora and postcolonial studies, such as those of Aamir Mufti, Jonathan and Daniel Boyarin, Sander Gilman, Susannah Heschel and Amos Funkenstein. The aim is to show that Geiger’s pioneering influence on the “objective” study of Islam—however motivated by his defence of Judaism in face of Christianity—should be seen as a gesture of hospitality towards Islam. I ultimately argue that Islam was not always exterior but also implicated in the construction of modern European identity. In the first chapter, I show how the corroboration of a Judaeo-Christian essence in Western literary criticism, particularly in the works of canonical critics like Matthew Arnold and Erich Auerbach, was informed by the nineteenth-century background of the “Jewish question.” In the second chapter, I trace how postmodern Jewish theory, as influenced by Derrida’s philosophy, has contended with the supersessionist and hegemonic implications of the Judaeo-Christian “hyphen.” Next, I turn to my case study of Abraham Geiger and contextualize his work with respect to the methods of German Orientalism and in relation to the German-Jewish emancipation struggle. I then analyze Geiger’s Was hat Mohammed aus dem Judenthume aufgenommen? in the light of Derrida’s philosophy of exemplarity and hospitality, as explained in Chapter Two.
Long Period Variables in the Large Magellanic Cloud from the EROS-2 survey
Creators: name: Spano, M.
name: Mowlavi, N.
name: Eyer, L.
name: Burki, G.
name: Marquette, J. -B.
name: Lecoeur-Taïbi, I.
name: Tisserand, P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context. The EROS-2 survey has produced a database of millions of time series from stars monitored for more than six years, allowing to classify some of their sources into different variable star types. Among these, Long Period Variables (LPVs), known to follow sequences in the period-luminosity diagram, include long secondary period variables whose variability origin is still a matter of debate. Aims.We use the 856 864 variable stars available from the Large Magellanic Cloud (LMC) in the EROS-2 database to detect, classify and characterize LPVs. Methods. Our method to extract LPVs is based on the statistical Abbe test. It investigates the regularity of the light curve with respect to the survey duration in order to extract candidates with long-term variability. The period search is done by Deeming, Lomb-Scargle and generalized Lomb-Scargle methods, combined with Fourier series fit. Color-magnitude, period-magnitude and period-amplitude diagrams are used to characterize our candidates. Results. We present a catalog of 43 551 LPV candidates for the Large Magellanic Cloud. For each of them, we provide up to five periods, mean magnitude in EROS-2, 2MASS and Spitzer bands, BE-RE color, RE amplitude and spectral type.We use infrared data to make the distinction between RGB, O-rich, C-rich and extreme AGB stars. Properties of our LPV candidates are investigated by analyzing period-luminosity and period-amplitude diagrams.
description: Accepted for publication in A&A
Natural Language for Expert Systems: Comparisons with Database Systems
Creators: name: McKeown, Kathleen
Publisher: name: Columbia University
Year: 1984
Subjects: Computer science
Information science

description: Do natural language database systems still provide a valuable environment for further work on natural language processing? Are there other systems which provide the same hard environment for testing, but allow us to explore more interesting natural language questions? In order to answer no to the first question and yes to the second (the position taken by our panel's chair), there must be an interesting language problem which is more naturally studied in some other system than in the database system. We are currently working on natural language for expert systems at Columbia and thus, expert systems provide a natural alternative environment to compare against the database system. The relatively recent success of expert systems in commercial environments (e.g., Stolfo and Vesonder 83, McDermott 81) indicates that they meet the criteria of a hard test environment. In our work, we are particularly interested in developing the ability to generate explanations that are tailored to the user of the system based on the previous discourse in order to do this in an interesting way. We assume that explanation will be part of natural language dialog with the system, allowing the user maximum flexibility in interacting with the system and allowing the system maximum opportunity to provide different explanations.
Smooth Integral Models for Certain Congruence Subgroups of Odd Spin Groups
Creators: name: Shahabi, Majid
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: Smooth Group Scheme
subject: Integral Model
subject: Congruence Subgroup
subject: Odd Spin Groups
subject: Mathematics
subject: FOS: Mathematics
subject: Physics
subject: Statistics

description: In this thesis, we introduce a family of congruence subgroups for general odd spin groups GSpin(2n+1)/Q (see Chapter 1 for definition of GSpin(2n+1)). We prove that our congruence subgroups for GSpin(2n+1) admit integral models that are smooth group schemes over Z with generic fibre isomorphic to GSpin(2n+1)/Q (Proposition 2.7 and Theorem 2.9), have specific special fibres (Proposition 2.12 and Theorem 2.13), and generalize Hecke's congruence subgroup for GL2(Q) (Proposition 2.15) and the paramodular subgroup for GSp4(Q) (Proposition 2.16), where N is a fixed positive integer. We also study a family of congruence subgroups for special odd orthogonal groups SO(2n+1)/Q, introduced by Gross and Tsai [G2, T1, T2]. These congruence subgroups are expected to appear in anologs of modularity for abelian varieties predicted by the Langlands program [G2,CD]. Using scheme theory, we prove that these congruence subgroups for SO(2n+1) admit integral models that are smooth group schemes over Z[1/2] with generic fibre isomorphic to SO(2n+1)/Q (Theorems 3.6, 3.16, 3.10, 3.17), have specific special fibres (Propositions 3.11 and 3.18, and Theorems 3.12 and 3.19), and have Zp-points isomorphic to the congruence subgroups of SO(2n+1) defined by Gross and Tsai [G2, T1, T2] (Theorems 3.13 and 3.20). We also prove that there exists a close relationship between our integral models for these congruence subgroups of GSpin(2n+1) and SO(2n+1) (Theorem 4.1).
Apterostigma Mayr 1865
Creators: name: Mera-Rodríguez, Daniela
name: Serna, Francisco
name: Sosa-Calvo, Jeffrey
name: Lattke, John
name: Rabeling, Christian
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Apterostigma

description: (16) Apterostigma sp. 1, auriculatum species-group Material examined. COLOMBIA: Nariño • 1 worker; Barbacoas; 01°21′49″N, 078°04′45″W; alt. 640 m; 25–29 Jul. 2006; A. Miranda leg.; UNAB 5459. Comment. This presumably new species is only known from a single worker and will be described in a forthcoming taxonomic revision of the A. auriculatum species-group.
description: Published as part of Mera-Rodríguez, Daniela, Serna, Francisco, Sosa-Calvo, Jeffrey, Lattke, John & Rabeling, Christian, 2020, A checklist of the non-leaf-cutting fungus-growing ants (Hymenoptera, Formicidae) from Colombia, with new biogeographic records, pp. 1205-1227 in Check List 16 (5) on page 1213, DOI: 10.15560/16.5.1205, http://zenodo.org/record/4059086
Phase Structure of Repulsive Hard-Core Bosons in a Stacked Triangular Lattice
Creators: name: Ozawa, H.
name: Ichinose, I.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this paper, we study phase structure of a system of hard-core bosons with a nearest-neighbor (NN) repulsive interaction in a stacked triangular lattice. Hamiltonian of the system contains two parameters one of which is the hopping amplitude $t$ between NN sites and the other is the NN repulsion $V$. We investigate the system by means of the Monte-Carlo simulations and clarify the low and high-temperature phase diagrams. There exist solid states with density of boson $ρ={1 \over 3}$ and ${2\over 3}$, superfluid, supersolid and phase-separated state. The result is compared with the phase diagram of the two-dimensional system in a triangular lattice at vanishing temperature.
description: 4+epsilon pages, 11 figures, Version to be published in Phys.Rev.A
Hepatic p53 is regulated by transcription factor FOXO1 and acutely controls glycogen homeostasis
Creators: name: Oster, Moritz
name: Galhuber, Markus
name: Krstic, Jelena
name: Steinhoff, Julia S.
name: Lenihan-Geels, Georgia
name: Wulff, Sascha
name: Kiefer, Marie F.
name: Petricek, Konstantin M.
name: Wowro, Sylvia J.
name: Flores, Roberto E.
name: Yang, Na
name: Li, Chen
name: Meng, Yueming
name: Reinisch, Isabel
name: Sommerfeld, Manuela
name: Weger, Stefan
name: Habisch, Hansjörg
name: Madl, Tobias
name: Schulz, Tim J.
name: Prokesch, Andreas
name: Schupp, Michael
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: p53
subject: Foxo1
subject: liver
subject: glucose metabolism
subject: glycogen
subject: triglycerides
subject: fasting
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: The tumor suppressor p53 is involved in the adaptation of hepatic metabolism to nutrient availability. Acute deletion of p53 in the mouse liver affects hepatic glucose and triglyceride metabolism. However, long-term adaptations upon the loss of hepatic p53 and its transcriptional regulators are unknown. Here we show that short-term, but not chronic, liver-specific deletion of p53 in mice reduces liver glycogen levels, and we implicate the transcription factor forkhead box O1 protein (FOXO1) in the regulation of p53 and its target genes. We demonstrate that acute p53 deletion prevents glycogen accumulation upon refeeding, whereas a chronic loss of p53 associates with a compensational activation of the glycogen synthesis pathway. Moreover, we identify fasting-activated FOXO1 as a repressor of p53 transcription in hepatocytes. We show that this repression is relieved by inactivation of FOXO1 by insulin, which likely mediates the upregulation of p53 expression upon refeeding. Strikingly, we find that high-fat diet-induced insulin resistance with persistent FOXO1 activation not only blunted the regulation of p53 but also the induction of p53 target genes like p21 during fasting, indicating overlapping effects of both FOXO1 and p53 on target gene expression in a context-dependent manner. Thus, we conclude that p53 acutely controls glycogen storage in the liver and is linked to insulin signaling via FOXO1, which has important implications for our understanding of the hepatic adaptation to nutrient availability.
Characterization of antibiotic resistance in ampicillin and tetracycline resistant escherichia coli from feedlot cattle fed subtherapeutic antimicrobials
Creators: name: Mirzaagha, Parasto
Publisher: name: University of Calgary
Year: 2008

description: Bibliography: p. 118-131
description: some pages are in colour
description: The study investigated tetracycline- and ampicillin-resistant Escherichia coli selected from feces of calves that were or were not administered in-feed subtherapeutic antimicrobials. Antimicrobial resistance (AMR) persisted throughout the experiment even in the absence of in-feed antibiotics. Transmission of E. coli isolates among cattle was evident, particularly among animals within a single pen. In addition, shedding of E. coli biotypes was observed to occur transiently throughout the feeding period. Administration of subtherapeutic levels of antimicrobials did not have a major impact on AMR E. coli as compared to control steers, except for the observation that administration of chlortetracycline and sulfamethazine increased the number of ampicillin-resistant isolates that also exhibited resistance to sulfamethoxazole and chloramphenicol. Molecular characterization of isolates found tet(B) to be the most prevalent determinant among the tetracycline-resistant isolates and teml-like determinant to be most prevalent among the ampicillin-resistant isolates. Results suggest that AMR in£. coli is complex and is likely affected not only by the administration of antibiotics but also by numerous other presently undefined environmental and management factors.
A_infinity-morphisms with several entries
Creators: name: Lyubashenko, Volodymyr
Publisher: name: arXiv
Year: 2012
Subjects: subject: Category Theory (math.CT)
subject: Algebraic Topology (math.AT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 18D50, 18D05, 18G35

description: We show that morphisms from n A_infinity-algebras to a single one are maps over an operad module with n+1 commuting actions of the operad A_infinity, whose algebras are conventional A_infinity-algebras. Similar statement holds for homotopy unital A_infinity-algebras. The operad A_infinity and modules over it have two useful gradings related by isomorphisms which change the degree. The composition of A_infinity-morphisms with several entries is presented as a convolution of a coalgebra-like and an algebra-like structures. For this sake notions of lax Cat-span multicategories and multifunctors are introduced. They are lax versions of strict multicategories and multifunctors associated with the monad of free strict monoidal category.
description: 111 pages
Macro-Operators: A Weak Method for Learning
Creators: name: Korf, Richard E.
Publisher: name: Columbia University
Year: 1985
Subjects: Computer science

description: This article explores the idea of learning efficient strategies for solving problems by searching for macro-operators. A macro-operator, or macro for short, is simply a sequence of operators chosen from the primitive operators of a problem. The technique is particularly useful for problems with non-serializable subgoals, such as Rubik's Cube, for which other weak methods fail. Both a problem-solving program and a learning program are described in detail. The performance of these programs is analyzed in terms of the number of macros required to solve all problem instances, the length of the resulting solutions (expressed as the number of primitive moves), and the amount of time necessary to learn the macros. In addition, a theory of why the method works, and a characterization of the range of problems for which it is useful are presented. The theory introduces a new type of problem structure called operator decomposability. Finally, it is concluded that the macro technique is a new kind of weak method, a method for learning as opposed to problem solving.
SIGLEC-1 in Systemic Sclerosis: A Useful Biomarker for Differential Diagnosis
Creators: name: Höppner, Jakob
name: Casteleyn, Vincent
name: Biesen, Robert
name: Rose, Thomas
name: Windisch, Wolfram
name: Burmester, Gerd Rüdiger
name: Siegert, Elise
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: Systemic Sclerosis
subject: SIGLEC-1
subject: biomarker
subject: interferon
subject: treatment
subject: cytokines
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Systemic Sclerosis (SSc) is a clinically heterogeneous disease that includes an upregulation of type I interferons (IFNs). The aim of this observational study was to investigate the IFN-regulated protein Sialic Acid–Binding Ig-like Lectin 1 (SIGLEC-1) as a biomarker for disease phenotype, therapeutic response, and differential diagnosis in SSc. Levels of SIGLEC-1 expression on monocytes of 203 SSc patients were determined in a cross-sectional and longitudinal analysis using multicolor flow cytometry, then compared to 119 patients with other rheumatic diseases and 13 healthy controls. SSc patients higher SIGLEC-1 expression on monocytes (2097.94 ± 2134.39) than HCs (1167.45 ± 380.93; p = 0.49), but significantly lower levels than SLE (8761.66 ± 8325.74; p < 0.001) and MCTD (6414.50 ± 1846.55; p < 0.001) patients. A positive SIGELC-1 signature was associated with reduced forced expiratory volume (p = 0.007); however, we were unable to find an association with fibrotic or vascular disease manifestations. SIGLEC-1 remained stable over time and was independent of changes in immunosuppressive therapy. However, SIGLEC-1 is suitable for differentiating SSc from other connective tissue diseases. SIGLEC-1 expression on monocytes can be useful in the differential diagnosis of connective tissue disease but not as a biomarker for SSc disease manifestations or activity.
Entanglement control via reservoir engineering in ultracold atomic gases
Creators: name: McEndoo, Suzanne
name: Haikka, Pinja
name: de Chiara, Gabriele
name: Palma, Massimo
name: Maniscalco, Sabrina
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study the entanglement of two impurity qubits immersed in a Bose-Einstein condensate (BEC) reservoir. This open quantum system is particularly interesting because the reservoir and system parameters are easily controllable and the reduced dynamics is highly non-Markovian. We show how the model allows for interpolation between a common dephasing scenario and an independent dephasing scenario by simply modifying the wavelength of the superlattice superposed to the BEC, and how this influences the dynamical properties of the impurities. We demonstrate the existence of very rich entanglement dynamics correspondent to different values of reservoir parameters, including phenomena such as entanglement trapping, entanglement sudden death, revivals of entanglement, and BEC-mediated entanglement generation. In the spirit of reservoir engineering, we present the optimal BEC parameters for entanglement generation and trapping, showing the key role of the ultracold gas interactions.
description: 8 pages, 8 figures
Apterostigma Mayr 1865
Creators: name: Mera-Rodríguez, Daniela
name: Serna, Francisco
name: Sosa-Calvo, Jeffrey
name: Lattke, John
name: Rabeling, Christian
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Apterostigma

description: (17) Apterostigma sp. 2, pilosum species-group Material examined. COLOMBIA: Cauca • 1 worker; Tambo; 02°30′24.11″N, 076°59′57″W; alt. 1448 m; 1–8 Apr. 2006; A. Galvis, Y. Mena leg.; UNAB 5455. Comment. This new Apterostigma species is only known from a single worker and will be described in a forthcoming taxonomic study.
description: Published as part of Mera-Rodríguez, Daniela, Serna, Francisco, Sosa-Calvo, Jeffrey, Lattke, John & Rabeling, Christian, 2020, A checklist of the non-leaf-cutting fungus-growing ants (Hymenoptera, Formicidae) from Colombia, with new biogeographic records, pp. 1205-1227 in Check List 16 (5) on page 1213, DOI: 10.15560/16.5.1205, http://zenodo.org/record/4059086
Exact Relaxation Dynamics in the Totally Asymmetric Simple Exclusion Process
Creators: name: Motegi, Kohei
name: Sakai, Kazumitsu
name: Sato, Jun
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The relaxation dynamics of the one-dimensional totally asymmetric simple exclusion process on a ring is considered in the case of step initial condition. Analyzing the time evolution of the local particle densities and currents by the Bethe ansatz method, we examine their full relaxation dynamics. As a result, we observe peculiar behaviors, such as the emergence of a ripple in the density profile and the existence of the excessive particle currents. Moreover, by making a finite-size scaling analysis of the asymptotic amplitudes of the local densities and currents, we find the scaling exponents with respect to the total number of sites to be -3/2 and -1 respectively.
description: 5 pages, 8 figures, v2: finite-size scaling of asymptotic amplitudes added, v3: minor revision
Cancer biomarker extraction from gene expression microarray data
Creators: name: Alshalalfa, Mohammed
Publisher: name: University of Calgary
Year: 2008

description: Bibliography: p. 115-124
description: some pages are in colour
description: Bioinformatics is a new field of science mainly integrating computer science, mathematics, statistics and biology where the aim is to discover knowledge hidden within biological data. One of the widely investigated biological data is gene expression microarray data. Profiling the global gene expression patterns in different tissues/ sample can be investigated in few days due to microarray technology, which can accommodate the whole genome, unlike traditional methods which may take months. However, analyzing micro array data is challenging as the number of features (genes) is very large relative to the number of attributes (samples). Fortunately, microarray has been successfully used to study gene expression data; this allowed researchers to investigate different diseases, including cancer. In other words, using microarray in cancer diagnosis showed to be very efficient and reliable, but the large number of genes makes the data noisy and difficult to deal with. Consequently, identifying relevant genes has received considerable attention. In this thesis, we combine biological knowledge with machine learning techniques to propose three methods for extracting the most informative genes for cancer classification. The first method is based on double clustering; we filter the data initially with a statistical test and then cluster the data iteratively to get the best number of clusters. The genes closest to the centroids of the resulting clusters showed to have high potential to be significant features for sample classification. These genes (one per centroid) are used as input for building a classification model. The second method is based on iterative t-test in a way that eliminates noise from the data. The third method is a hybrid approach which combines statistical tests with entropy based tests. This method uses the t-test and Singular Value Decomposition (SVD) based entropy. It showed to be effective as it considers the feature itself and its effect on the data entropy. This approach is the first to combine entropy and statistical significance for gene ranking. We have also developed SVD based gene extraction method for multi-class data; only introduced at high level in this thesis, details are left are future work. The test results reported demonstrate the applicability and effectiveness of the three proposed approaches. _x000D_ Index Terms: Classification, clustering, t-test, singular value decomposition, support vector machine, microarray data, gene expression data, over-expression, underexpress10n._x000D_
On the group theoretic structure of a class of quantum dialogue protocols
Creators: name: Shukla, Chitra
name: Kothari, Vivek
name: Banerjee, Anindita
name: Pathak, Anirban
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Intrinsic symmetry of the existing protocols of quantum dialogue are explored. It is shown that if we have a set of mutually orthogonal $n$-qubit states {\normalsize $\{|ϕ_{0}>,|ϕ_{1}>,....,|ϕ_{i}\}$ and a set of $m-qubit$ ($m\leq n$) unitary operators $\{U_{0},U_{2},...,U_{2^{n}-1}\}:U_{i}|ϕ_{0}>=|ϕ_{i}>$ and $\{U_{0},U_{2},...,U_{2^{n}-1}\}$ forms a group under multiplication then it would be sufficient to construct a quantum dialogue protocol using this set of quantum states and this group of unitary operators}. The sufficiency condition is used to provide a generalized protocol of quantum dialogue. Further the basic concepts of group theory and quantum mechanics are used here to systematically generate several examples of possible groups of unitary operators that may be used for implementation of quantum dialogue. A large number of examples of quantum states that may be used to implement the generalized quantum dialogue protocol using these groups of unitary operators are also obtained. For example, it is shown that GHZ state, GHZ-like state, W state, 4 and 5 qubit Cluster states, Omega state, Brown state, $Q_{4}$ state and $Q_{5}$ state can be used for implementation of quantum dialogue protocol. The security and efficiency of the proposed protocol is appropriately analyzed. It is also shown that if a group of unitary operators and a set of mutually orthogonal states are found to be suitable for quantum dialogue then they can be used to provide solutions of socialist millionaire problem.
description: 15 pages
On the Extended Emission Around the Anomalous X-ray Pulsar 1E 1547.0-5408
Creators: name: Olausen, S. A.
name: Kaspi, V. M.
name: Ng, C. -Y.
name: Zhu, W. W.
name: Dib, R.
name: Gavriil, F. P.
name: Woods, P. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present an analysis of the extended emission around the anomalous X-ray pulsar 1E 1547.0-5408 using four XMM-Newton observations taken with the source in varying states of outburst as well as in quiescence. We find that the extended emission flux is highly variable and strongly correlated with the flux of the magnetar. Based on this result, as well as on spectral and energetic considerations, we conclude that the extended emission is dominated by a dust-scattering halo and not a pulsar wind nebula (PWN), as has been previously argued. We obtain an upper limit on the 2-10 keV flux of a possible PWN of 4.7e-14 erg/s/cm^2, three times less than the previously claimed value, implying an efficiency for conversion of spin-down energy into nebular luminosity of <9e-4 (assuming a distance of 4 kpc). We do, however, find strong evidence for X-ray emission from the supernova remnant shell surrounding the pulsar, as previously reported.
description: 16 pages, 3 tables, 4 figures, published in the Astrophysical Journal
Employee perceptions and voluntary turnover: a case study
Creators: name: Silverberg, Shane M.
Publisher: name: University of Calgary
Year: 2008

description: Bibliography: p. 350-366
description: The purpose of this study is to examine how employees' perceptions influence turnover decisions, during a period when critical intra-organizational conditions (i.e., corporate uncertainty and restructuring) and external economic conditions (i.e., commodity boom) are present. Exploration, in the present investigation, attempts to achieve a comprehensive understanding of turnover by observing and identifying how distinct perceptions combine to influence this construct. The evidence found in this particular case study will be compared with the relevant turnover literature from three theoretical bodies of knowledge to determine how effective these existing literatures are at explaining turnover decisions. The exploratory work conducted in this study offers a unique opportunity to examine first-hand how perceptions of workplace justice, the state of the organization, external opportunities, as well as elements of job satisfaction all combine to influence employees' turnover decisions. The study is founded upon exit interviews of employees leaving a Canadian resource company, dubbed here as "ResourceCo". All departing ResourceCo employees were leaving of their own volition following a prolonged period of corporate uncertainty and organizational change. This exodus took place during an especially positive period of economic expansion for the resource sector. Through the exit interview process, departing employees were provided with a forum to comment on a wide variety of aspects of their work experience. Prior to data collection, the researcher achieved insider status within the study's setting. The researcher had an intimate knowledge of the company, its history, its departments, and its employees. The data suggests that employees' perceptions around autonomy, voice, and decision-making were especially significant to the turnover determinations. Other perceptions that appeared to influence turnover included thoughts on: the time it took the ResourceCo to fill vacant positions following attrition (and the resultant impact on workload); mentorship; retention efforts; compensation; external career opportunities; and interactional justice ( e.g., fair treatment, recognition, etc.). Some implications of the study's findings around such issues as turnover avoidance measures, turnover anticipation, retention and recruitment, mentorship, and demographics and turnover are briefly considered for improved corporate policy, heightened employee understanding, and future research endeavours.
Colorado water, February 2022
Creators: name: Mokry, Melissa
name: Colorado Water Center, Publisher
Publisher: name: Mountain Scholar
Year: 2022
Subjects: subject: Water resources development -- Colorado
subject: Water supply -- Colorado
subject: Water use -- Colorado
subject: Water supply -- Management -- Colorado

description: The newsletter is devoted to highlighting water research and activities at CSU and throughout Colorado.
description: Newsletter of the CSU Water Center. Theme: InTERFEWS, Interdisciplinary Training, Education and Research in Food-Energy-Water Systems.
Cystatin C and sex dimorphism in experimental autoimmune encephalomyelitis
Creators: name: Hoghooghi, Vahid
Publisher: name: Cumming School of Medicine
Year: 2018
Subjects: subject: Neuroscience
subject: Immunology
subject: FOS: Clinical medicine

description: This dissertation characterizes the role of a lysosomal enzyme inhibitor, Cystatin C (CysC), in an animal model of multiple sclerosis (MS), called experimental allergic encephalomyelitis (EAE). MS is an autoimmune disease characterized by infiltration of myelin reactive immune cells into the central nervous system (CNS) that is more prevalent in genetically susceptible women compared to men. Alteration in the level of CysC in the CNS of MS patients is known, but its role has not been determined. Towards clarifying the role of CysC in EAE, I initially hypothesized that CysC would have a beneficial function in EAE due to its protective role in another autoimmune disease, collagen-induced arthritis. Unexpectedly, using C57BL/6 and CysC null (CysCKO) mice, I discovered that CysC plays a detrimental role in female but not male EAE mice. This sex dimorphism in the function of CysC could also be observed in immune cell infiltration and demyelination in EAE. Towards elucidating the cellular mechanism(s) underlying the sex difference driven by CysC in EAE, I discovered that the protease inhibitor promotes the activation of antigen presenting cells such as macrophages in females that subsequently mediates stimulation of CD4+ T cells. The T cell activation-promoting ability of CysC in female macrophages appears to be related to antigen presentation in macrophages since molecular mediators of antigen processing and loading (LC3II) and presentation (CD80, CD86, MHC II) were disrupted in female, but not male, macrophages that lacked CysC. Cumulatively, these observations indicate that CysC drives sex dimorphism in macrophages. Lastly, to understand why CysC would induce sex differences in macrophage function and thus EAE susceptibility, I investigated if sex hormones were involved. I found that CysC plays a detrimental role in EAE in the presence of estrogen. This dissertation thus provides novel evidence that CysC has a role in mediating sex dimorphism in EAE.
When is the Library Open? - Do Open Knowledge Commitments Match Open Access Aspirations?
Creators: name: Neylon, Cameron
Publisher: name: Zenodo
Year: 2019
Subjects: libraries
digital libraries
open science
methologies

description: Invited presentation at OpenAIRE Workshop on Open Science Publishing Practices and Prospects, co-located with IRCDL2019 conference, Pisa.
Local population structure of white pine weevil (Pissodes strobi [Peck]) in interior and Sitka spruce stands in British Columbia
Creators: name: Wytrykush, Debra Lynne
Publisher: name: University of British Columbia
Year: 2011

description: White pine weevil is a pest of interior and Sitka spruce species in British Columbia. It is native to eastern Canada, and migrated to the west. To date, control of the weevil has been ineffective even with the combined use of several control methods. Current research has focused on breeding resistant trees for use in plantations to overcome attack from Pissodes strobi. Knowledge of the weevil genetic structure on a small-scale stand level is extremely important in developing strategies that decrease the possible development of tolerance in P. strobi populations to resistant trees. To understand the population structure of P. strobi 15 microsatellite markers were used to investigate local population structure. Genetic structure of local weevil populations differed over stand age in both interior and Sitka spruce plantations. The younger and older plots had more single populations associated with individual trees than did middle aged plots. Middle-aged plots had increased beetle movement regardless of the number of weevil larvae per leader, increased number of females ovipositing per tree and less weevil genetic differentiation between trees. Understanding reproductive dynamics of P. strobi will help develop strategies for planting resistant trees to decrease the development of insect tolerance and further our knowledge of the possible co-evolutionary dynamics of this system.
Thiol‐Click Based Polyglycerol Hydrogels as Biosensing Platform with In Situ Encapsulated Streptavidin Probes
Creators: name: Thongrom, Boonya
name: Dimde, Mathias
name: Schedler, Uwe
name: Haag, Rainer
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: 3D hydrogels
subject: encapsulation efficiency
subject: release and degradation study
subject: streptavidin
subject: thiol‐click chemistry
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: An in situ streptavidin‐encapsulated hydrogel based on dendritic polyglycerol (dPG) which is functionalized with either an acrylate, allyl or acrylamide group and dithiolated polyethylene glycol (PEG) is constructed via a thiol‐click chemistry approach and is investigated for biosensing applications. The hydrogel platform is screened for the encapsulation and release efficiencies of the model protein streptavidin under varying physicochemical conditions, for example, crosslinking chemistry reactions, the molar ratio between the two gel components, macromonomer concentrations or pH‐values. By that, tailor‐made hydrogels can be developed, which are able to encapsulate or release the model protein for several days based on its modality. Furthermore, the accessible binding site of encapsulated streptavidin or in other words, the biotin‐binding performance is quantified, and the stability of the various hydrogel types is studied by rheology measurements, 1H NMR, gel permeation chromatography (GPC), and mass loss experiments.