cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Flavor Symmetries in Extra Dimensions
Creators: name: Aranda, Alfredo
name: Diaz-Cruz, J. Lorenzo
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a class of models of flavor that rely on the use of flavor symmetries and the Froggart-Nielsen mechanism in extra dimensions. The particle content is that of the standard model plus an additional flavon field; all the fields propagate in universal extra dimensions and the flavor scale is associated with the cutoff of the theory, which in 5D is $\sim 10$ TeV. The Yukawa matrices are generated by higher dimension operators involving flavon fields, whose vacuum expectation values break the flavor symmetry. We apply this framework and present a specific 5D model based on a discrete local symmetry that reproduces all fermion masses and mixing angles both in the quark and charged lepton sectors.
description: 9 pages RevTex, 2 tables, Included more discussion related to the FN mechanism in extra dimensions. The neutrino sector has been modified and a new smaller symmetry has been implemented. To appear in Mod. Phys. Lett. A
Studies of Rater and Item Effects in Rater Models
Creators: Zhao, Yihan
Publisher: name: Columbia University
Year: 2020
Subjects: Educational evaluation
Educational tests and measurements
Signal detection
Students--Recruiting
Achievement tests--Evaluation

description: The goal underlying educational testing is to measure psychological constructs in a particular domain and to produce valid inferences about examinees’ ability. To achieve this goal of getting a precise ability evaluation, test developers construct questions with different formats, such as multiple-choice (MC) items, and open-ended questions or constructed response (CR) test items, for example, essay items. In recent years, large-scale assessments have implemented CR items in addition to MC items as an essential component of the educational assessment landscape. However, utilizing CR items in testing involves two main challenges, including rater effects and rater correlations. One challenge is the error added by human raters’ subjective judgments, such as rater severity and rater central tendency. Rater severity effect refers to the effect that raters may tend to give consistently low or high ratings that cause biased ability evaluation (Leckie & Baird, 2011). Central tendency describes when raters tend to use middle categories in the scoring rubric and avoid using extreme criteria (Saal et al., 1980). The second challenge is that multiple raters usually grade an examinee’s essay for quality control purposes; however, ratings based on the same item are correlated and need to be handled carefully by appropriate statistical procedures (Eckes, 2011; Kim, 2009). To solve these problems, DeCarlo (2010) proposed an HRM-SDT model that extended the traditional signal detection theory (SDT) model used in the first level of HRM. The HRM-SDT model not only considers the hierarchical structure of rating data but also deals with various rater effects beyond rater severity. This research examined to what extent the HRM-SDT separates rater effects (i.e., rater severity and rater central tendency) from item effects (i.e., item difficulty). Accordingly, one goal of this study was to simulate various rater effects and item effects to investigate the performance of the HRM-SDT model with respect to separating these effects. The other goal was to compare the fit of the HRM-SDT model with one commonly used model in language assessments, the Rasch model, in different simulation conditions and to examine the difference between these two models in terms of segregating rater and item effects. To answer these questions, Simulation A and Simulation B were conducted. In Simulation A, seven sets of parameters were varied in the first set of simulations. Simulation B addressed some questions of particular interest using another four sets of parameters, where both the rater and item parameters were simultaneously varied. This study found the HRM-SDT accurately recovered parameters, and clearly detected and separated changes in rater severity, rater central tendency, and item difficulty in most conditions.
Tailings Facility Failures : Lessons for Accountable Executives and Consulting Engineers
Creators: name: Davies, Michael
name: Lupo, John
name: Priscu, Caius
Publisher: name: The University of British Columbia
Year: 2023

description: The focus on the mining industry’s management of tailings facilities, brought about by several high-profile catastrophic failures, has increased considerably over the past decade. These failures offer many lessons to the industry. The combined perspectives of three former major mining company executives who were also global practice area leads with corporate tailings management responsibility leads to several such lessons directly aimed at failure prevention/elimination. While there are documents available which aim to define the roles of key people in tailings facility stewardship, these other efforts usually fail to identify the essential attributes for these individuals, based upon lessons from the failures that have occurred. The authors’ experience in this field of practice, which combined is well in excess of 100 years and is inclusive of detailed knowledge of both past failure events and incidents that were “close calls” for the industry, allows us to compile a list of what should be considered “non-optional attributes” for both Accountable Executives and consulting engineers to have either role filled by sufficiently qualified individuals. For consulting engineers, it is aimed specifically at those in the role of either the “Engineer of Record” or the “Designer of Record.” In addition, the manner with which Independent Review should be used to inform both the Accountable Executive and the consulting engineer is also addressed, including examples of where that review is no longer independent and, therefore, unacceptable.
A new method to constrain the origins of dark matter-free galaxies and their unusual globular clusters
Creators: name: Leigh, Nathan
name: Fragione, Giacomo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a novel method to constrain the past collisional evolution of observed globular cluster (GC) systems, in particular their mass functions. We apply our method to a pair of galaxies hypothesized to have recently undergone an episode of violent relaxation due to a strong galaxy-galaxy interaction, namely NGC 1052-DF2 and NGC 1052-DF4. We begin by exploring the observational evidence for a collisional origin for these two recently discovered ultra-diffuse galaxies observed in the NGC 1052 group, posited in the literature to be dark matter (DM)-free. We compute the timescales for infall to the central nucleus due to dynamical friction (DF) for the GCs in these galaxies, using the shortest of these times to constrain how long ago a galaxy-galaxy interaction could have occurred. We go on to quantify the initial GC numbers and densities needed for significant collisional evolution to occur within the allotted times, and show that, if the hypothesis of a previous galaxy-galaxy interaction is correct, a paucity of low-mass GCs should be revealed by deeper observational surveys. If any are found, they should be more spatially extended than the currently observed GC population. Finally, we apply our method to these galaxies, in order to illustrate its efficacy in constraining their dynamical evolution. Our results motivate more complete observations of the GC luminosity functions in these galaxies, in addition to future studies aimed at combining the method presented here with a suite of numerical simulations in order to further constrain the origins of the curious GC populations in these (and other) galaxies.
description: 12 pages, 5 figures, 2 table, accepted by ApJ
Clinopodium abyssinicum Kuntze
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Lamiaceae
Clinopodium
Clinopodium abyssinicum

description: Clinopodium abyssinicum (Benth.) Kuntze  —
Habit: Woody herb or shrub.
Habitat: LMDF; up to 2 700 m. Distribution: I.
 Voucher: North Mount Kenya, Alt. 2 560 m, 4 Feb. 1933, Rogers 391 (EA).
 References: Bussmann (1994), Paton et al. (2009), Abdi (2013), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 85, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Studies of SV40-transformation and the Loss of Growth Factor Requirements
Creators: Powers, Robert Scott
Publisher: name: Columbia University
Year: 2013
Subjects: Biology

description: I found that SV40 transformation induced the loss of several specific growth factor requirements. In particular, SV40 transformed 3T3 fibroblasts had a significantly reduced growth requirement for insulin. A reduced insulin requirement was also observed in several other transformed cell lines. Dose response studies with insulin and insulin-like growth factors indicated that the mitogenic response to insulin is in all probability mediated by IGF-I receptors, and that the reduced insulin requirement observed in transformed fibroblasts actually reflects the loss of a strong IGF-I requirement. IGF-I is under strict pituitary-growth hormone control in vivo, and mediates many if not all of the growth promoting effects of growth hormone. A reduced IGF-I requirement may allow transformed fibroblasts to escape from this major humoral regulatory system. SV40 transformed cells also displayed a significantly diminished requirement for platelet-derived growth factor (PDGF). The loss of this particular growth factor requirement was found to be closely associated with the loss of density-dependent growth inhibition. Cell lines transformed by temperature sensitive mutants of SV40 exhibited a temperature sensitive loss of the PDGF requirement, indicating that SV40 T-antigen mediates this effect. Results pertaining to the temperature sensitivity of the insulin requirement were inconclusive. I found that SV40 could directly reduce the insulin requirement of 3T3 cells in a transformation assay based upon the stringent insulin requirement of 3T3 cells for colony formation. Several such insulin-transformants were isolated and characterized.  Although all of these transformants expressed SV40 T-antigen, some of them retained anchorage-dependence and/or a partial PDGF requirement, unlike transformants obtained in the standard density of anchorage assays. A revertant of SV40 transformed 3T3 cells was found to have regained a very strong dependence upon insulin. This dependence was not overcome by re-transformation with Kirsten Murine Sarcoma virus, although retransformation did obviate both its density-dependent growth inhibition and PDGF requirement.  Kirsten transformed 3T3 normally display a greatly reduced insulin requirement, indicating that this particular revertant may have suffered a cellular mutation that prevents transforming viruses from induced the reduced insulin requirement.
Finsler Geometric Local Indicator of Chaos for single orbits in the Henon-Heiles hamiltonian
Creators: name: Cipriani, Piero
name: Di Bari, Maria
Publisher: name: arXiv
Year: 1998
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Mathematical Physics (math-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Translating the dynamics of the Henon--Heiles hamiltonian as a geodesic flow on a Finsler manifold, we obtain a local and synthetic Geometric Indicator of Chaos (GIC) for two degrees of freedom continuous dynamical systems. It represents a link between local quantities and asymptotic behaviour of orbits giving a strikingly evident, one-to-one, correspondence between geometry and instability.
description: 4 pages, plus 3 postscript figures (2 available on request due to huge size!). Submitted to PRL
Studies of a Site-Specific Recombination System and Analysis of New Modulators of Notch Signaling in C. elegans
Creators: Vargas, Marcus L.
Publisher: name: Columbia University
Year: 2012
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular biology
subject: Developmental biology

description: The ability to make transgenic animals has been a great tool for biologists to study living organisms. In C. elegans, the way transgenes are generated makes them problematic in many circumstances, and there is no single, simple, reliable approach that circumvents all of the problems with current methods of introducing transgenes into C. elegans. In Chapter 2, I discuss my attempt to develop a transgenic system in C. elegans using the bacteriophage phiC31 integrase system. I show evidence that phiC31 integrase is active in C. elegans somatic tissue. I have successfully integrated a transgene into the C. elegans genome in single-copy using phiC31 dependent recombination-mediated cassette exchange. However, attempts to repeat phiC31-mediated integration has been unsuccessful.
In Chapter 3, I use genetic analysis to test many genes that were reported to be associated with the gamma-secretase complex in a mammalian tissue culture system. The gamma-secretase complex is an important component in the Notch signaling pathway. Not only is the gamma-secretase complex essential in the Notch pathway, it is also implicated in the pathology of familial Alzeheimer's disease (FAD). As gamma-secretase complex components show a Notch loss-of-function phenotype in C. elegans, a reverse genetic approach, using genes encoding proteins that associate with Presenilin was used to identify putative new Notch modulators. Several genes were identified that suppress a glp-1(gf) allele and one gene that suppress a gfp-1(lf) allele. These genes are unlikely to be core components of the Notch signaling pathway.
Non-equilibrium fixed points of coupled Ising models
Creators: name: Young, Jeremy T.
name: Gorshkov, Alexey V.
name: Foss-Feig, Michael
name: Maghrebi, Mohammad F.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Driven-dissipative systems are expected to give rise to non-equilibrium phenomena that are absent in their equilibrium counterparts. However, phase transitions in these systems generically exhibit an effectively classical equilibrium behavior in spite of their non-equilibrium origin. In this paper, we show that multicritical points in such systems lead to a rich and genuinely non-equilibrium behavior. Specifically, we investigate a driven-dissipative model of interacting bosons that possesses two distinct phase transitions: one from a high- to a low-density phase---reminiscent of a liquid-gas transition---and another to an antiferromagnetic phase. Each phase transition is described by the Ising universality class characterized by an (emergent or microscopic) $\mathbb{Z}_2$ symmetry. They, however, coalesce at a multicritical point, giving rise to a non-equilibrium model of coupled Ising-like order parameters described by a $\mathbb{Z}_2 \times \mathbb{Z}_2$ symmetry. Using a dynamical renormalization-group approach, we show that a pair of non-equilibrium fixed points (NEFPs) emerge that govern the long-distance critical behavior of the system. We elucidate various exotic features of these NEFPs. In particular, we show that a generic continuous scale invariance at criticality is reduced to a discrete scale invariance. This further results in complex-valued critical exponents and spiraling phase boundaries, and it is also accompanied by a complex Liouvillian gap even close to the phase transition. As direct evidence of the non-equilibrium nature of the NEFPs, we show that the fluctuation-dissipation relation is violated at all scales, leading to an effective temperature that becomes "hotter" and "hotter" at longer and longer wavelengths. Finally, we argue that this non-equilibrium behavior can be observed in cavity arrays with cross-Kerr nonlinearities.
description: 19+11 pages, 7+9 figures
The multiple sum formulas for 9j and 12j coefficients of SU(2) and $u_q$(2)
Creators: name: Alisauskas, Sigitas
Publisher: name: arXiv
Year: 1999
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 81R,33C,33D

description: Seven different triple sum formulas for $9j$ coefficients of the quantum algebra $u_q(2)$ are derived, using for these purposes the usual expansion of $q$-$9j$ coefficients in terms of $q$-$6j$ coefficients and recent summation formula of twisted $q$-factorial series (resembling the very well-poised basic hypergeometric $_5ϕ_4$ series) as a $q$-generalization of Dougall's summation formula of the very well-poised hypergeometric $_4F_3(-1)$ series. This way for $q=1$ the new proof of the known triple sum formula is proposed, as well as six new triple sum formulas for $9j$ coefficients of the SU(2) group, in the angular momentum theory. The mutual rearrangement possibilities of the derived triple sum formulas by means of the Chu--Vandermonde summation formulas are considered and applied to derive several versions of double sum formulas for the stretched $q$-$9j$ coefficients, which give new rearrangement and summation formulas of special Kampé de Fériet functions and their $q$-generalizations. Several fourfold sum formulas [with each sum of the $_5F_4(1)$ or $_5ϕ_4$ type] for the $12j$ coefficients of the second kind (without braiding) of the SU(2) and $u_q(2)$ are proposed, as well as expressions with five sums [of the $_4F_3(1)$ and $_3F_2(1)$ or $_4ϕ_3$ and $_3ϕ_2$ type] for the $12j$ coefficients of the first kind (with braiding) instead of the usual expansion in terms of $q$-$6j$ coefficients. Stretched and doubly stretched $q$-$12j$ coefficients [as triple, double or single sums, related to composed or separate hypergeometric $_4F_3(1)$ and $_5F_4(1)$ or $_4ϕ_3$ and $_5ϕ_4$ series, respectively] are considered.
description: 41 pages, REVTeX, uses Xy-pic, v. 4, minimal corrections and added Appendix D
Clinopodium kilimandschari Ryding
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Lamiaceae
Clinopodium
Clinopodium kilimandschari

description: Clinopodium kilimandschari (Gürke) Ryding  —
Habit: Herb.
Habitat: UMF, HZ, AZ, NZ; 2 800–4 500 m. Distribution: II.
 Voucher: Chogoria Track, Alt. 4 306 m, 20 Jul. 2014, SAJIT 001922 (HIB).
 References: Fries & Fries (1930b), Young & Peacock (1985), Bussmann (1994), Paton et al. (2009), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 85, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Numerical Evidence that the Perturbation Expansion for a Non-Hermitian $\mathcal{PT}$-Symmetric Hamiltonian is Stieltjes
Creators: name: Bender, C. M.
name: Weniger, E. J.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Recently, several studies of non-Hermitian Hamiltonians having $\mathcal{PT}$ symmetry have been conducted. Most striking about these complex Hamiltonians is how closely their properties resemble those of conventional Hermitian Hamiltonians. This paper presents further evidence of the similarity of these Hamiltonians to Hermitian Hamiltonians by examining the summation of the divergent weak-coupling perturbation series for the ground-state energy of the $\mathcal{PT}$-symmetric Hamiltonian $H=p^2+{1/4}x^2+iλx^3$ recently studied by Bender and Dunne. For this purpose the first 193 (nonzero) coefficients of the Rayleigh-Schrödinger perturbation series in powers of $λ^2$ for the ground-state energy were calculated. Padé-summation and Padé-prediction techniques recently described by Weniger are applied to this perturbation series. The qualitative features of the results obtained in this way are indistinguishable from those obtained in the case of the perturbation series for the quartic anharmonic oscillator, which is known to be a Stieltjes series.
description: 20 pages, 0 figures
On the use of the Operator Product Expansion to constrain the hadron spectrum
Creators: name: Golterman, Maarten
name: Peris, Santiago
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We call into question a recently proposed idea on how the short-distance behavior of QCD correlation functions constrains hadronic states to become degenerate parity eigenstates as one goes up in the spectrum. In particular, we point out that the sum rules which have been proposed in this context are in general regulator dependent, and thus ill-defined.
description: 10 pages, LaTeX. A few explanatory comments added. Conclusions unchanged. Version to appear in Journal
Combinatorial Bandits with Relative Feedback
Creators: name: Saha, Aadirupa
name: Gopalan, Aditya
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We consider combinatorial online learning with subset choices when only relative feedback information from subsets is available, instead of bandit or semi-bandit feedback which is absolute. Specifically, we study two regret minimisation problems over subsets of a finite ground set $[n]$, with subset-wise relative preference information feedback according to the Multinomial logit choice model. In the first setting, the learner can play subsets of size bounded by a maximum size and receives top-$m$ rank-ordered feedback, while in the second setting the learner can play subsets of a fixed size $k$ with a full subset ranking observed as feedback. For both settings, we devise instance-dependent and order-optimal regret algorithms with regret $O(\frac{n}{m} \ln T)$ and $O(\frac{n}{k} \ln T)$, respectively. We derive fundamental limits on the regret performance of online learning with subset-wise preferences, proving the tightness of our regret guarantees. Our results also show the value of eliciting more general top-$m$ rank-ordered feedback over single winner feedback ($m=1$). Our theoretical results are corroborated with empirical evaluations.
description: 47 pages, 12 fgures
Clinopodium simense Kuntze
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Lamiaceae
Clinopodium
Clinopodium simense

description: Clinopodium simense (Benth.) Kuntze  —
Habit: Herb.
Habitat: LMWF, LMDF, BZ, UMF; 1 600–3 500 m. Distribution: II.
 Voucher: Sirimon Track, Alt. 3096 m, 17 Jul. 2014, CPG 28353 (HIB, PE).
 References: Fries & Fries (1930b), Young & Peacock (1985), Bussmann (1993, 1994), Bussmann & Beck (1995a), Paton et al. (2009), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 85, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
title: Abgasbehandlung für Dieselmotoren
Creators: name: Hoffmann, Ulrich
Publisher: name: Goltze
Year: 1987
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Jahrbuch der BWG
subject: 66

description: Dieselmotoren emittieren neben den auch von Ottomotoren ausgestoßenen Schadstoffen wie Kohlenwasserstoffen, Stickoxiden und Kohlenmonxid je nach Typ und Fahrbedingung auch Rußpartikel. Diese Rußpartikel besitzen eine große spezifische Oberfläche, auf der feinste "Kondensattröpfchen" adsorbiert sind. Zu den adsorbierten Spezies gehören u. a. reizerregende teiloxidierte Kohlenwasserstoffe (Aldehyde, Ketone, Phenole) sowie kondensierte Aromaten (PAH).
Aufgrund einer zunehmenden Umweltbelastung wird eine drastische Reduzierung der Schadstoffe und eine Einführung der seit langem in den USA geltenden Grenzwerte in Europa gefordert.
Nach dem heutigen Stand der Technik können die Emissionsgrenzwerte nur durch eine Abgasfilterung eingehalten werden. Obwohl in den letzten Jahren Fortschritte erzielt wurden, ist derzeit bei den Dieselmotoren der Nutzfahrzeuge weder das Problem der Partikelfilterung noch das der rechtzeitigen, selbsttätigen Regeneration zufriedenstellend gelöst.
Zur Gewährleistung eines sicheren Fahrzeugbetriebes muß eine rechtzeitige Erhöhung der Abgastemperatur zur Regenerierung des Filters vorgenommen werden, um Verstopfungen des Filters durch Ruß zu vermeiden; andernfalls steigt der Abgasdruck auf nicht vertretbare Werte an.
Es wird daher nach Lösungen gesucht, einerseits die Abgastemperaturen rechtzeitig zu erhöhen oder aber die Zündtemperaturen des abgeschiedenen Rußes durch geeignete Katalysatoren zu senken.
Höhe Abgastemperaturen können z. B.
- durch "Anfetten" des im Motor gebildeten Luft-Kraftstoff-Gemisches
oder
- durch die Anordnung eines abgas-/luftgespeisten Brenners im Abgassystem vor dem Filter, welcher bei Bedarf gezündet werden kann, erzeugt werden.
Die Katalysatoren können entweder dem Kraftstoff als Additiv zugegeben, dem Abgas beigemischt oder aber direkt durch Imprägnierung auf das Filtermaterial aufgebracht werden.
Als Fazit ergibt sich, daß ein selbständiges Freibrennen der Dieselruß-Filtersysteme mit unterschiedlichen Katalysatorsystemen erst oberhalb 300°C erreicht werden konnte.
title: Probleme der Schwerölverbrennung in Dieselmotoren
Creators: name: Behrens, R.
Publisher: name: Goltze
Year: 1987
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Jahrbuch der BWG
subject: 62

description: Große Dieselmotoren werden aus wirtschaftlichen Gründen in zunehmendem Maße mit Schweröl betrieben. Probleme treten dabei durch schlechte Zünd- und Brenneigenschaften sowie durch erhöhten Verschleiß auf.
Evaluation of Partitioning Clustering Algorithms for Processing Social Media Data in Tourism Domain
Creators: name: Renjith, Shini
name: Sreekumar, A.
name: Jathavedan, M.
Publisher: name: figshare
Year: 2020
Subjects: subject: 80704 Information Retrieval and Web Search
subject: FOS: Media and communications

description: Recommender systems are evolving as an essential part of every industry with no exception to travel and tourism segment. Considering the exponential increase in social media usage and huge volume of data being generated through this channel, it can be considered as a vital source of input data for modern recommender systems. This in turn resulted in the need of efficient and effective mechanisms for contextualized information retrieval. Traditional recommender systems adopt collaborative filtering techniques to deal with social context. However they turn out to be computational intensive and thereby less scalable with internet and social media as input channel. A possible solution is to adopt clustering techniques to limit the data to be considered for recommendation process. In tourism context, based on social media interactions like reviews, forums, blogs, feedbacks, etc. travelers can be clustered to form different interest groups. This experimental analysis aims at comparing key clustering algorithms with the aim of finding an optimal option that can be adopted in tourism domain by applying social media datasets from travel and tourism context.
Studies of the structure of potassium channel KcsA in the open conformation and the effect of anionic lipids on channel inactivation
Creators: Zhang, Dongyu
Publisher: name: Columbia University
Year: 2019
Subjects: Chemistry
Biophysics
Potassium channels
Membrane proteins
Membrane lipids

description: Membrane proteins play a vital role in cellular processes. In this thesis, we use KcsA, a prokaryotic potassium channel, as a model to investigate the gating mechanism of ion channels and the effect of anionic lipids on the channel activity using solid-state NMR spectroscopy. KcsA activity is known to be highly dependent on the presence of negatively charged lipids. Multiple crystal structures combined with biochemistry assays suggest that KcsA is co-purified with anionic lipids with phosphatidylglycerol headgroup. Here, we identified this specifically bound, isotopically labeled lipid in the protein 13C-13C correlation spectra. Our results reveal that the lipid cross peaks show stronger intensity when the channel is in the inactivated state compared to the activated state, which indicates a stronger protein-lipid interaction when KcsA is inactivated. In addition, our data shows that including anionic lipids into proteoliposomes leads to a weaker potassium ion affinity at the selectivity filter. Considering ion loss as a model of inactivation, our results suggest anionic lipids promote channel inactivation. However, the surface charge is not the only physical parameter that regulates channel gating or conformational preference. We found that the channel adapted to different conformations when reconstituted into liposome either made of DOPC or DOPE, two zwitterionic lipids. Also, we were able to stabilize the open-conformation of KcsA in 3:1 DOPE/DOPG liposome at pH 4.0 and acquired several multi-dimensional solid-state NMR experiments for site-specific resonance assignments. This is the first time that we obtain wild-type full-length KcsA structural information on the transient state. The structure is not only important for understanding channel gating, but can also serve as a homology model for investigating drug binding with more complicated potassium channels such as human voltage gated channel (hERG).
Class III Milk in the New York Milkshed: I. Manufacturing Operations
Creators: name: Cobb, Fields W.
name: Clarke, D. A.
name: Cobb, Fields W.
name: Clarke, D. A.
Publisher: name: Unknown
Year: 1960
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business

description: Excerpts from the report Preface: This report is the first of a group dealing with Class III milk pricing in the New York-New Jersey milkshed. Particular emphasis is given to factors affecting the market for Class Ill products, and to the decisions which handlers make about the form in which they will dispose of Class III milk. This report provides in graphic form a summary description of the manufactured dairy products industry in this area. It describes the nature of Class III operations, including types and location of products manufactured. Interregional plant shipments of milk for manufacturing purposes and of manufactured dairy products are analyzed. Regional production patterns for both pool plants and the New York State nonpool plants are developed and estimates are made of the extent to which existing manufacturing capacity is utilized.
Particle-Set Identification method to study multiplicity fluctuations
Creators: name: Gazdzicki, M.
name: Gorenstein, M. I.
name: Mackowiak-Pawlowska, M.
name: Rustamov, A.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: In this paper a new method of experimental data analysis, the Particle-Set Identification method, is presented. The method allows to reconstruct moments of multiplicity distribution of identified particles. The difficulty the method copes with is due to incomplete particle identification -- a particle mass is frequently determined with a resolution which does not allow for a unique determination of the particle type. Within this method the moments of order $k$ are calculated from mean multiplicities of $k$-particle sets of a given type. The Particle-Set Identification method remains valid even in the case of correlations between mass measurements for different particles. This distinguishes it from the Identity method introduced by us previously to solve the problem of incomplete particle identification in studies of particle fluctuations.
Spectral Statistics in Chaotic Systems with Two Identical Connected Cells
Creators: name: Dittrich, Thomas
name: Koboldt, Gert
name: Mehlig, Bernhard
name: Schanz, Holger
Publisher: name: arXiv
Year: 1998
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Chaotic systems that decompose into two cells connected only by a narrow channel exhibit characteristic deviations of their quantum spectral statistics from the canonical random-matrix ensembles. The equilibration between the cells introduces an additional classical time scale that is manifest also in the spectral form factor. If the two cells are related by a spatial symmetry, the spectrum shows doublets, reflected in the form factor as a positive peak around the Heisenberg time. We combine a semiclassical analysis with an independent random-matrix approach to the doublet splittings to obtain the form factor on all time (energy) scales. Its only free parameter is the characteristic time of exchange between the cells in units of the Heisenberg time.
description: 37 pages, 15 figures, changed content, additional author
Clinopodium uhligii var. obtusifolium Ryding
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Lamiaceae
Clinopodium
Clinopodium uhligii
Clinopodium uhligii (gürke) ryding var. obtusifolium (avetta) ryding

description: Clinopodium uhligii (Gürke) Ryding var. obtusifolium (Avetta) Ryding  —
Habit: Herb.
Habitat: LMWF, LMDF, BZ, UMF; 1 700–3 600 m. Distribution: II.
 Voucher: Chogoria Track, Alt. 3 250 m, 12 Oct. 1985, Beentje 2411 (EA).
References: Bussmann (1993, 1994), Bussmann & Beck (1995a).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 85, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
The First Law of Complexity
Creators: name: Bernamonti, Alice
name: Galli, Federico
name: Hernandez, Juan
name: Myers, Robert C.
name: Ruan, Shan-Ming
name: Simón, Joan
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the variation of holographic complexity for two nearby target states. Based on Nielsen's geometric approach, we find the variation only depends on the end point of the optimal trajectory, a result which we designate the first law of complexity. As an example, we examine the complexity=action conjecture when the AdS vacuum is perturbed by a scalar field excitation, which corresponds to a coherent state. Remarkably, the gravitational contributions completely cancel and the final variation reduces to a boundary term coming entirely from the scalar field action. Hence the null boundary of Wheeler-DeWitt patch appears to act like the "end of the quantum circuit".
description: 7 pages + supplemental material, 2 figures; v2: clarifications and reference added, published version
The Absence of Fermionic Superradiance (A Simple Demonstration)
Creators: name: Kim, Hongsu
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Superradiant scattering, which can be thought of as the wave analogue of the Penrose process is revisited. As is well-known, boson fields display superradiance provided they have frequency in a certain range whereas fermion fields do not. A succinct superradiance-checking algorithm employing particle number or energy current is formally reviewed and then applied to the case of fermion field. The demonstrations of the absence of fermionic superradiance in terms of the particle number current exist in the literature but they are in the context of two-component SL(2,C) spinor formalism for massive spinor and SO(3,1) Dirac spinor formalism for massless spinor. Here we present an alternative demonstration in terms of both particle number and energy current but in a different context of local SO(3,1) Dirac spinor formalism for both massless and massive spinors. It appears that our presentation confirms the absence of fermionic superradiance in a more simple and systematic manner.
description: 16 pages, Revtex
Labidarge tegularis Konow 1907
Creators: name: Taeger, Andreas
name: París, Mercedes
name: Nieves-Aldrey, Jose Luis
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Labidarge
Labidarge tegularis

description: Labidarge tegularis Konow, 1907
A junior subjective synonym of Scobina terminalis (Klug, 1814), synonymy by Smith (1992: 28).
Types. Labidarge tegularis Konow 1907d: 220–221. Syntypes ♂, “Brasilia, Coca.” Lectotype ♂, designated by Smith (1992: 28, MNCN_Ent 81545, MNCN Cat. Tipos Nº 11741, http://dx.doi.org/10.6084/m9.figshare.775318). Type locality: Ecuador: Puerto Francisco de Orellana (“Coca”). Paralectotype: 1 ♂ same data as the lectotype (MNCN_Ent 81546, MNCN Cat. Tipos Nº 11741).
Discussion. Konow (1907d) assumed “Coca” to be a locality in Brazil, but it is a place in Ecuador. The green labels with the data of Pacific’s expedition were added as a result of a project cataloguing the insects collected in that Expedition (Santos Mazorra, 1994).
description: Published as part of Taeger, Andreas, París, Mercedes & Nieves-Aldrey, Jose Luis, 2014, The type specimens of sawflies (Hymenoptera: Symphyta) of the Museo Nacional de Ciencias Naturales, Madrid, pp. 103-138 in Zootaxa 3790 (1) on pages 134-135, DOI: 10.11646/zootaxa.3790.1.5, http://zenodo.org/record/4914035
Credible Failure Modes : Summary of 2021 and 2023 Workshops
Creators: name: Small, Andy
name: Küpper, Angela
name: Johndrow, Tamara
name: Al-Mamun, Mohammad (Mamun)
Publisher: name: The University of British Columbia
Year: 2023

description: This paper provides a discussion on the credible failure modes concept that was included in the Global Industry Standard on Tailings Management (GISTM) issued in August 2020 (GTR, 2020). The interpretation of the credible failure mode concept has been the subject of much discussion and a group of industry leaders convened two workshops (November 2021 and April 2023) to explore the concept and the interpretation of credible failure modes in practice. The key messages from those workshops were as follows: • There are two interpretations when determining credible failure modes; one is based on whether a failure mode is physically possible and the other is based on consideration of negligibility that needs to be clearly defined. • Both interpretations embrace risk assessments and call for a thorough understanding, evaluation, and management of risks associated with potential failure modes. • Both interpretations satisfy the intent of the GISTM. This is an evolving topic, and as the tailings storage facility (TSF) safety community continues to advance the credible failure modes concept in practice, perspectives presented in this paper may also evolve.
Role of a hairpin-stabilized pause in the Escherichia coli thiC riboswitch function
Creators: name: Chauvier, Adrien
name: Jean-François Nadon
name: Grondin, Jonathan P.
name: Lamontagne, Anne-Marie
name: Lafontaine, Daniel A.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: Transcriptional pauses have been reported in bacterial riboswitches and, in some cases, their specific positioning has been shown to be important for gene regulation. Here, we show that a hairpin structure in the Escherichia coli thiamin pyrophosphate (TPP) thiC riboswitch is involved in transcriptional pausing and ligand sensitivity. Using in vitro transcription kinetic experiments, we show that all three major transcriptional pauses in the thiC riboswitch are affected by NusA, a transcriptional factor known to stimulate hairpin-stabilized pauses. Using a truncated region of the riboswitch, we isolated the hairpin structure responsible for stabilization of the most upstream pause. Destabilization of this structure led to a weaker pause and a decreased NusA effect. In the context of the full-length riboswitch, this same mutation also led to a weaker pause, as well as a decreased TPP binding affinity. Our work suggests that RNA structures involved in transcriptional pausing in riboswitches are important for ligand sensitivity, most likely by increasing the time allowed to the ligand for binding to the riboswitch.
Single Electron-Hole Pair Sensitive Silicon Detector with Surface Event Rejection
Creators: name: Hong, Ziqing
name: Ren, Runze
name: Kurinsky, Noah
name: Figueroa-Feliciano, Enectali
name: Wills, Lise
name: Ganjam, Suhas
name: Mahapatra, Rupak
name: Mirabolfathi, Nader
name: Nebolsky, Brian
name: Pinckney, H. Douglas
name: Platt, Mark
Publisher: name: arXiv
Year: 2019
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We demonstrate single electron-hole pair resolution in a single-sided, contact-free 1 cm$^2$ by 1 mm thick Si crystal operated at 48 mK, with a baseline energy resolution of 3 eV. This crystal can be operated at voltages in excess of $\pm50$ V, resulting in a measured charge resolution of 0.06 electron-hole pairs. The high aluminum coverage ($\sim$70%) of this device allows for the discrimination of surface events and separation of events occurring near the center of the detector from those near the edge. We use this discrimination ability to show that non-quantized dark events seen in previous detectors of a similar design are likely dominated by charge leakage along the side wall of the device.
description: 7 pages, 4 figures, Accepted to NIM A
Classical and quantum chaos in a circular billiard with a straight cut
Creators: name: Ree, Suhan
name: Reichl, L. E.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study classical and quantum dynamics of a particle in a circular billiard with a straight cut. This system can be integrable, nonintegrable with soft chaos, or nonintegrable with hard chaos, as we vary the size of the cut. We use a quantum web to show differences in the quantum manifestations of classical chaos for these three different regimes.
description: LaTeX2e, 8 pages including 3 Postscript figures and 4 GIF figures, submitted to Phys. Rev. E
Coleus alpinus Vatke
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Lamiaceae
Coleus
Coleus alpinus

description: Coleus alpinus Vatke  —
Habit: Herb.
Habitat: LMWF, LMDF; 1 400–2 800 m. Distribution: II.
 Voucher: Mount Kenya and Aberdare Range, 11–12 Jan. 1975, D’Arcy 7451 (WAG).
 References: Bussmann (1994), Bussmann & Beck (1995a, 1999), Paton et al. (2009), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 85, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Studies on Mixed Slab-Toroidal Electron Temperature Gradient Mode Instabilities in the Columbia Linear Machine
Creators: Balbaky, Abed Raouf
Publisher: name: Columbia University
Year: 2015
Subjects: Plasma (Ionized gases)
Physics

description: This thesis investigates the behavior of electron temperature gradient (ETG) driven instabilities in the Columbia Linear Machine (CLM). Building on prior work in CLM, the primary goal of this research is to produce, identify, and illuminate the basic physics of these instabilities, and explore the behavior of these instabilities under the presence of trapping and curved magnetic field lines.
      The first part of this thesis is focused on studying the saturated ETG mode, and the general behavior of the mode under varying levels of magnetic curvature. Measuring ETG modes can be problematic since they have large real frequencies, fast growth rates (~MHz) and small spatial scales, but carefully designed probe diagnostics can overcome these limits. In order to produce curved magnetic field lines, we modified CLM to operate with an internal movable mirror coil. We determined the temperature and density profiles under varying curvature, and measured changes in the mode structure and frequency. We found small changes in the azimuthal/poloidal structure and frequency, characterized by an increase in the m-number (m_slab~10-13 and Δ m~1), along with small changes in the axial/toroidal structure (k_ǁcurvature
title: Ernst Henze: Nachruf
Creators: name: Kanold, Hans-Joachim
Publisher: name: Goltze
Year: 1987
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Jahrbuch der BWG
subject: 902

description: Vorgetragen in der Plenarversammlung am 13. Februar 1987