cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Fit and Vulnerable: Attacks and Defenses for a Health Monitoring Device
Creators: name: Rahman, Mahmudur
name: Carbunar, Bogdan
name: Banik, Madhusudan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: The fusion of social networks and wearable sensors is becoming increasingly popular, with systems like Fitbit automating the process of reporting and sharing user fitness data. In this paper we show that while compelling, the integration of health data into social networks is fraught with privacy and security vulnerabilities. Case in point, by reverse engineering the communication protocol, storage details and operation codes, we identified several vulnerabilities in Fitbit. We have built FitBite, a suite of tools that exploit these vulnerabilities to launch a wide range of attacks against Fitbit. Besides eavesdropping, injection and denial of service, several attacks can lead to rewards and financial gains. We have built FitLock, a lightweight defense system that protects Fitbit while imposing only a small overhead. Our experiments on BeagleBoard and Xperia devices show that FitLock's end-to-end overhead over Fitbit is only 2.4%.
Entwicklung und Anwendung prozesstechnischer und analytischer Systeme zur Wertschöpfung bioaktiver Inhaltsstoffe aus Kartoffeln
Creators: name: Graf, Alain-Michel
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Potato protein
subject: membrane adsorber chromatography
subject: protease inhibitors
subject: bioactive peptides
subject: enzymatic hydrolysis
subject: Kartoffelprotein
subject: Membranadsorber-Chromatographie
subject: Patatin
subject: Proteaseinhibitoren
subject: bioaktive Peptide
subject: enzymatische Hydrolyse
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie

description: [no abstract]
Identifying and handling unbalanced baseline characteristics in a non-randomized, controlled, multicenter social care nurse intervention study for patients in advanced stages of cancer
Creators: name: Frick, Johann
name: Gebert, Pimrapat
name: Grittner, Ulrike
name: Letsch, Anne
name: Schindel, Daniel
name: Schenk, Liane
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: Advanced cancer
subject: Nurse support
subject: Quality of life
subject: Patient-reported outcomes
subject: Intervention study
subject: Recruitment phase
subject: Selection effects
subject: Study participation
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Purpose: Given the psychosocial burdens patients in advanced stages of cancer face, innovative care concepts are needed. At the same time, such vulnerable patient groups are difficult to reach for participation in intervention studies and randomized patient inclusion may not be feasible. This article aims to identify systematic biases respectively selection effects occurring during the recruitment phase and to discuss their potential causes based on a non-randomized, multicenter intervention study with patients in advanced stages of cancer. Methods: Patients diagnosed with at least one of 16 predefined cancers were recruited at four hospitals in three German cities. The effect of social care nurses' continuous involvement in acute oncology wards was measured by health-related quality of life (EORTC QLQ-C30), information and participation preferences, decisional conflicts, doctor-patient communication, health literacy and symptom perception. Absolute standardized mean difference was calculated as a standardized effect size to test baseline characteristics balance between the intervention and control groups. Results: The study enrolled 362 patients, 150 in the intervention and 212 in the control group. Except for gender, both groups differed in relevant socio-demographic characteristics, e.g. regarding age and educational background. With respect to the distribution of diagnoses, the intervention group showed a higher symptom burden than the control group. Moreover, the control group reported better quality of life at baseline compared to the intervention group (52.6 points (SD 21.7); 47.8 points (SD 22.0), ASMD = 0.218, p = 0.044). Conclusion: Overall, the intervention group showed more social and health vulnerability than the control group. Among other factors, the wide range of diagnoses included and structural variation between the recruiting clinics increased the risk for bias. We recommend a close, continuous monitoring of relevant social and health-related characteristics during the recruitment phase as well as the use of appropriate statistical analysis strategies for adjustment, such as propensity score methods.
Dante's Divina Commedia: Spring Lecture 25 (Paradiso 26, 27, 28)
Creators: name: Barolini, Teodolinda
Publisher: name: Columbia University
Year: 2016
Subjects: Italian literature

description: Spring Lecture 25 of the course "Dante's Divina Commedia" taught by Teodolinda Barolini, Lorenzo da Ponte Professor of Italian at Columbia University. This iteration of her year-long Dante course was taught in two-hour, twice-weekly sessions during Fall 2015 and Spring 2016 (Dante’s Divina Commedia, Italian W4091 & W4092). Recorded April 19, 2016. 0:00 – Paradiso 26; language 21:55 – Paradiso 27 1:19:20 – Paradiso 28
Untersuchungen zur Entwicklung von Rollenkonvektion in Kaltluftausbrüchen mittels Grobstruktursimulationen
Creators: name: Gryschka, Micha
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Roll convection
subject: cold-air outbreaks
subject: large-eddy simulation
subject: Rollenkonvektion
subject: Kaltluftausbrüche
subject: Grobstruktursimulation
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Satellite Gravity Field Recovery Using Variance-Covariance Information From Ocean Tide Models
Creators: name: Hauk, Markus
name: Wilms, Josefine
name: Sulzbach, Roman
name: Panafidina, Natalia
name: Hart-Davis, Michael
name: Dahle, Christoph
name: Müller, Vitali
name: Murböck, Michael
name: Flechtner, Frank
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: GRACE Follow-on
subject: gravity field
subject: variance-covariance
subject: ocean tides
subject: 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften

description: Monthly gravity field recovery using data from the GRACE and GRACE Follow-On missions includes errors limiting the spatial and temporal resolution of the estimated gravity fields. The major error contributions, besides the noise of the accelerometer instruments, arise from temporal aliasing errors due to imperfections in the non-tidal atmospheric and oceanic de-aliasing models and ocean tide models. We derive uncertainty information for the eight major tidal constituents from five different ocean tide models and introduce it into the gravity field recovery process in terms of a constrained normal equation system while expanding the parameter space by additional tidal parameters to be adjusted. We prove the effectiveness of the ocean tide variance-covariance information through realistic simulations and we assess its potential based on microwave and laser interferometer observations from the GRACE Follow-On mission. We show that errors are reduced by more than 20% ocean wRMS for a Gaussian filter radius of 300 km if uncertainty information for ocean tides is considered and stochastic modeling of instrument errors is applied, compared to the latest GFZ release 6.1. Our results also show the limited visibility of the effectiveness of the ocean tide variance-covariance information due to the dominating error contribution of non-tidal atmospheric and oceanic mass variations. Additionally, we investigate the option of estimating ocean tide parameters over a 1-year period while including ocean tide uncertainty information in order to improve ocean tide background modeling.
Discussion on the Cosmological Vacuum Energy
Creators: name: Nielsen, H. B.
name: Balazs, C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The present discussion contribution is some remarks concerning and review of the proposal by one of us (C. Balazs) to explain the cosmological constant by a/the principle of entropy. Used without further comment this principle of entropy could easily lead to untrustable {\em nonlocalities}, but taking into account that the long range correlations are rather to be understood as due to initial condition set up the model for the cosmological constant being small by one of us becomes quite viable.
description: Alreay published as a discussion contribution between H.B. Nielsen and C. Balazs, really a comment to the talk in Bled Conference on "What Come beyond the Standard Models" by C. Balazs. (at first I sent a wrong too early version)
Learning domain invariant representations by joint Wasserstein distance minimization
Creators: name: Andeol, Léo
name: Kawakami, Yusei
name: Wada, Yuichiro
name: Kanamori, Takafumi
name: Müller, Klaus-Robert
name: Montavon, Grégoire
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Domain invariance
subject: Subpopulation shift
subject: Joint distribution matching
subject: Wasserstein distance
subject: Neural networks
subject: Supervised learning
subject: 000 Informatik, Informationswissenschaft, allgemeine Werke::000 Informatik, Wissen, Systeme::004 Datenverarbeitung; Informatik

description: Domain shifts in the training data are common in practical applications of machine learning; they occur for instance when the data is coming from different sources. Ideally, a ML model should work well independently of these shifts, for example, by learning a domain-invariant representation. However, common ML losses do not give strong guarantees on how consistently the ML model performs for different domains, in particular, whether the model performs well on a domain at the expense of its performance on another domain. In this paper, we build new theoretical foundations for this problem, by contributing a set of mathematical relations between classical losses for supervised ML and the Wasserstein distance in joint space (i.e. representation and output space). We show that classification or regression losses, when combined with a GAN-type discriminator between domains, form an upper-bound to the true Wasserstein distance between domains. This implies a more invariant representation and also more stable prediction performance across domains. Theoretical results are corroborated empirically on several image datasets. Our proposed approach systematically produces the highest minimum classification accuracy across domains, and the most invariant representation.
Neue Erkenntnisse zur Besiedlung Westfalens am Ende des späten Jungpaläolithikums
Creators: name: Holzkämper, Jörg
name: Maier, Andreas
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2016

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2011 (2012)
On two topological cardinal invariants of an order-theoretic flavour
Creators: name: Spadaro, Santi
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Topology (math.GN)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: Primary: 03E04, 54A25, Secondary: 03E35, 54D70

description: Noetherian type and Noetherian $π$-type are two cardinal functions which were introduced by Peregudov in 1997, capturing some properties studied earlier by the Russian School. Their behavior has been shown to be akin to that of the \emph{cellularity}, that is the supremum of the sizes of pairwise disjoint non-empty open sets in a topological space. Building on that analogy, we study the Noetherian $π$-type of $κ$-Suslin Lines, and we are able to determine it for every $κ$ up to the first singular cardinal. We then prove a consequence of Chang's Conjecture for $\aleph_ω$ regarding the Noetherian type of countably supported box products which generalizes a result of Lajos Soukup. We finish with a connection between PCF theory and the Noetherian type of certain Pixley-Roy hyperspaces.
Novel multi-objective affinity approach allows to identify pH-specific μ-opioid receptor agonists
Creators: name: Secker, Christopher
name: Fackeldey, Konstantin
name: Weber, Marcus
name: Ray, Sourav
name: Gorgulla, Christoph
name: Schütte, Christof
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: multi-objective affinity approach
subject: pH-specific μ-opioid receptor agonists
subject: identification
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::615 Pharmakologie, Therapeutik

description: Opioids are essential pharmaceuticals due to their analgesic properties, however, lethal side effects, addiction, and opioid tolerance are extremely challenging. The development of novel molecules targeting the -opioid receptor (MOR) in inflamed, but not in healthy tissue, could significantly reduce these unwanted effects. Finding such novel molecules can be achieved by maximizing the binding affinity to the MOR at acidic pH while minimizing it at neutral pH, thus combining two conflicting objectives. Here, this multi-objective optimal affinity approach is presented, together with a virtual drug discovery pipeline for its practical implementation. When applied to finding pH-specific drug candidates, it combines protonation state-dependent structure and ligand preparation with high-throughput virtual screening. We employ this pipeline to characterize a set of MOR agonists identifying a morphine-like opioid derivative with higher predicted binding affinities to the MOR at low pH compared to neutral pH. Our results also confirm existing experimental evidence that NFEPP, a previously described fentanyl derivative with reduced side effects, and recently reported -fluorofentanyls and -morphines show an increased specificity for the MOR at acidic pH when compared to fentanyl and morphine. We further applied our approach to screen a >50K ligand library identifying novel molecules with pH-specific predicted binding affinities to the MOR. The presented differential docking pipeline can be applied to perform multi-objective affinity optimization to identify safer and more specific drug candidates at large scale.
Frühe Hirschjäger am Hellweg bei Werl-Büderich
Creators: name: Baales, Michael
name: Heinen, Martin
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2016

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2011 (2012)
Schiefcharaktere und reduzierte Kronecker-Produkte von Charakteren der symmetrischen Gruppe
Creators: name: Gutschwager, Christian
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Symmetric Group
subject: characters
subject: Schur functions
subject: Symmetrische Gruppe
subject: Charaktere
subject: Schur-Funktionen
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: [no abstract]
Electronic and optical properties of Cr and Cr-N doped anatase TiO2 from screened Coulomb hybrid calculations
Creators: name: Celik, Veysel
name: Mete, Ersen
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We studied the electronic and atomic structures of anatase TiO2 codoped with Cr and N using hybrid density functional theory calculations. Nonlocal screened Hartree-Fock exchange energy is partially mixed with traditional semilocal exchange part. This not only heals the band gap underestimation but also improves the description of anion/cation-driven impurity states and magnetization of the dopants. Cr and/or N doping modifies the valence and conduction band edges of TiO2 leading to significant band gap reduction. Hence, Cr, N and Cr-N doped TiO2 are promising for enhanced photoactivity.
description: 6 pages, 1 table and 4 figues
Rätsel um PD 268 gelöst – Forschungen zu einem alliierten Bomberabsturz in Hagen
Creators: name: Baales, Michael
name: Blank, Ralf
name: Klötzer, Horst
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2016

description: .
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2014 (2015)
Particle-Antiparticle Mixing, CP Violation and Rare K and B Decays in a Minimal Theory of Fermion Masses
Creators: name: Buras, Andrzej J.
name: Girrbach, Jennifer
name: Ziegler, Robert
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present a detailed study of Delta F=2 observables and of rare K^+(K_L) and B_{s,d} meson decays in a "Minimal Theory of Fermion Masses" (MTFM). In this theory Yukawa couplings are generated through the mixing with heavy vectorlike (VF) fermions. This implies corrections to the SM quark couplings to W, Z and Higgs so that FCNC processes receive contributions from tree level Z and Higgs exchanges and W bosons couple to right-handed quarks. In a particular version of this model in which the Yukawa matrix lambda^D in the heavy down fermion sector is unitary, lambda^U =1 and M = M_{VF} is fixed, only three real and positive definite parameters describe New Physics (NP) contributions to all Delta F=2 and Delta F=1 observables in K and B_{s,d} systems once the known quark masses and the CKM matrix are correctly reproduced. For M>1 TeV NP contributions to B_{s,d}^0- bar{B}_{s,d}^0 mixings are found to be very small. While in principle NP contributions to epsilon_K and Delta F=1 processes could be large, the correlation between epsilon_K and K_L->mu^+ mu^- eliminates basically NP contributions to epsilon_K and right-handed current contributions to Delta F=1 FCNC observables. We find CMFV structure in B_{s,d} decays with BR(B_{s,d}->mu^+ mu^-) uniquely enhanced for M=3 TeV by at least 35% and almost up to a factor of two over their SM values. Also BR(K^+->pi^+ bar{nu} nu) and BR(K_L->pi^0 bar{nu} nu)$ are uniquely enhanced by similar amount but the correlation between them differs from the CMFV one. We emphasize various correlations between K and B_{s,d} decays that could test this scenario. The model favours gamma=68°, |V_{ub}|=0.0037, S_{psi K_S}=0.72, S_{psi phi}=0.04 and 4.2*10^-9
mu^+ mu^-)<5.0*10^-9 for M=3-4 TeV.
description: 75 pages, 12 figures
title: Of utilization of ash and slag waste from enterprises of a fuel and energy complex
Creators: name: Zvereva, E.R.
name: Plotnikova, V.P.
name: Burganova, F.I.
name: Zverev, L.O.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: With the rational management of ash and slag waste from the enterprises of the fuel and energy complex, it is possible to reduce the negative environmental impact on the environment and get a net profit of 125 million rubles a year from the production of high-quality products.
Use of research-based instructional strategies: how to avoid faculty quitting
Creators: name: Wieman, Carl
name: Deslauriers, Louis
name: Gilley, Brett
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: We have examined the teaching practices of faculty members who adopted research-based instructional strategies as part of the Carl Wieman Science Education Initiative (CWSEI) at the University of British Columbia. Of the 70 that adopted such strategies with the support of the CWSEI program, only one subsequently stopped using these strategies. This is a tiny fraction of the 33% stopping rate for physics faculty in general [Henderson, Dancy, and Niewiadomska-Bugaj, PRST-PER, 8, 020104 (2012)]. Nearly all of these UBC faculty members who had an opportunity to subsequently use RBIS in other courses (without CWSEI support) did so. We offer possible explanations for the difference in quitting rates. The direct support of the faculty member by a trained science education specialist in the discipline during the initial implementation of the new strategies may be the most important factor.
description: 7 pages
P-spaces and the Volterra property
Creators: name: Spadaro, Santi
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: primary 54E52, 54G10, secondary 28A05

description: We study the relationship between generalizations of $P$-spaces and Volterra (weakly Volterra) spaces, that is, spaces where every two dense $G_δ$ have dense (non-empty) intersection. In particular, we prove that every dense and every open, but not every closed subspace of an almost $P$-space is Volterra and that there are Tychonoff non-weakly Volterra weak $P$-spaces. These results should be compared with the fact that every $P$-space is hereditarily Volterra. As a byproduct we obtain an example of a hereditarily Volterra space and a hereditarily Baire space whose product is not weakly Volterra. We also show an example of a Hausdorff space which contains a non-weakly Volterra subspace and is both a weak $P$-space and an almost $P$-space.
description: in press on the Bulletin of the Australian Mathematical Society
Comparative Measurements of Inverse Spin Hall and Magnetoresistance in YIG|Pt and YIG|Ta
Creators: name: Hahn, Christian
name: De Loubens, Grégoire
name: Klein, Olivier
name: Viret, Michel
name: Naletov, Vladimir V.
name: Youssef, J. Ben
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report on a comparative study of spin Hall related effects and magnetoresistance in YIG|Pt and YIG|Ta bilayers. These combined measurements allow to estimate the characteristic transport parameters of both Pt and Ta layers juxtaposed to YIG: the spin mixing conductance $G_{\uparrow \downarrow}$ at the YIG$|$normal metal interface, the spin Hall angle $Θ_{SH}$, and the spin diffusion length $λ_{sd}$ in the normal metal. The inverse spin Hall voltages generated in Pt and Ta by the pure spin current pumped from YIG excited at resonance confirm the opposite signs of spin Hall angles in these two materials. Moreover, from the dependence of the inverse spin Hall voltage on the Ta thickness, we extract the spin diffusion length in Ta, found to be $λ_{sd}^\text{Ta}=1.8\pm0.7$ nm. Both the YIG|Pt and YIG|Ta systems display a similar variation of resistance upon magnetic field orientation, which can be explained in the recently developed framework of spin Hall magnetoresistance.
description: 8 pages, 5 figures, 1 table
Porous calcium copper titanate electrodes for paracetamol degradation by electro-oxidation via CuO-induced peroxymonosulfate activation
Creators: name: Makhoul, Elissa
name: Tanos, Fida
name: Bekheet, Maged F.
name: Riedel, Wiebke
name: Petit, Eddy
name: Viter, Roman
name: Tepliakova, Iryna
name: Ramanavicius, Arunas
name: Razzouk, Antonio
name: Lesage, Geoffroy
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: persistent organic pollutants
subject: paracetamol degradation
subject: oxidation process
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: Some drugs cannot be efficiently eliminated using routine wastewater treatments and therefore are considered persistent organic pollutants (POPs). POPs can be removed using advanced oxidation processes. Among these processes, the combination of electrocatalysis and a sulfate-based advanced oxidation process via peroxymonosulfate (PMS) activation is an attractive approach due to its high efficiency, low energy consumption and non-selective attack. It is well known that the type of anode strongly affects the electrocatalysis performance for water treatment. Here, we evaluated perovskites as electrode material due to their unique structural properties and high chemical stability. We fabricated porous anodes of calcium copper titanate (CaCu3Ti4O12; CCTO) with different percentages (20%, 30% and 40%) of polymethyl methacrylate (PMMA) by ball-milling. The samples that included PMMA displayed 50% porosity and pores were homogenously distributed. Morphological measurements show the presence of grain structures and grain boundaries containing CCTO and CuO phases, respectively. CCTO with 30 wt% PMMA (CCTO-30) exhibited the highest CuO phase amount, defect percentage and oxidation–reduction peak, and the smallest resistance. We used the obtained CCTO nanocomposites as anodes in a beaker (210 mL) with PMS (0.5 mM) to treat 10 ppm paracetamol in 50 mM sodium sulfate. After 90 minutes, paracetamol was completely decomposed using CCTO-30 due to PMS activation by a copper catalytic cycle (Cu2+/Cu1+ and Cu2+/Cu3+) to generate ˙SO4− radicals and Cu3+ non-radicals that are selective for its removal.
Thermodynamics of quantum spin chains with competing interactions
Creators: name: Tavares, T. S.
name: Ribeiro, G. A. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider integrable quantum spin chains with competing interactions. We apply the quantum transfer matrix approach to these spin chains. This allowed us to derive a set of non-linear integral equations for the thermodynamics of these spin chains. We provide numerical solution of these integral equations for the entropy as function of magnetic field, temperature and the coupling constant. This allow us to assess, at low but finite temperature, the picture describing the ground state diagram for high spin chain and longer range interchain interactions.
description: 21 pages, 3 figures
title: Calculation of efficiency of mass transfer in nozzles
Creators: name: Dudarovskaya, O.G.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: This article is devoted to the determination of mass transfer efficiency in packed-type mass transfer apparatuses. To calculate the efficiency of mass transfer, models of the structure of flows are used, namely the cell model, which allows one to find the concentration value in each cell and construct a concentration profile along the length of the packed layer. Based on the data obtained, a graph of the change in the concentration of naphthalene vapor in the gas phase along the length of the packed layer was constructed, and the efficiency of the process under consideration was determined.
Treatment of like-particle pairing with quartets
Creators: name: Sambataro, M.
name: Sandulescu, N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The ground state correlations induced by a general pairing Hamiltonian in a finite system of like fermions are described in terms of four-body correlated structures (quartets). These are real superpositions of products of two pairs of particles in time-reversed states. Quartets are determined variationally through an iterative sequence of diagonalizations of the Hamiltonian in restricted model spaces and are, in principle, all distinct from one another. The ground state is represented as a product of quartets to which, depending on the number of particles (supposed to be even, in any case), an extra collective pair is added. The extra pair is also determined variationally. In case of pairing in a spherically symmetric mean field, both the quartets and the extra pair (if any) are characterized by a total angular momentum J=0. Realistic applications of the quartet formalism are carried out for the Sn isotopes with the valence neutrons in the 50-82 neutron shell. Exact ground state correlation energies, occupation numbers and pair transfer matrix elements are reproduced to a very high degree of precision. The formalism also lends itself to a straightforward and accurate description of the lowest seniority 0 and 2 excited states of the pairing Hamiltonian. A simplified representation of the ground state as a product of identical quartets is eventually discussed and found to improve considerably upon the more traditional particle-number projected-BCS approach.
description: 17 pages, 4 figures, to appear in Journal of Physics G: Nuclear and Particle Physics
title: Heat exchanger with optical heat exchange for heat supply systems with pulse circulation of heat carrier
Creators: name: Makeev, A.N.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: The article discusses the use of a heat exchanger with an oscillating heat exchange surface for heat supply systems with pulsed circulation of coolant. The relevance of the topic is justified by the possibility of intensification of heat exchange processes from the use of the potential of oscillating flows, which ultimately can be used to improve the overall energy efficiency of heat supply systems. The difficulties of using standard technical solutions for heat exchangers for heating systems with pulsed circulation of coolant are indicated. An original technical solution of a water-to-water heat exchanger based on a double-flow self-sustaining impact unit is presented. The novelty of the design is protected by a patent of the Russian Federation.
The scientific work was prepared within the framework of the grant of the President of the Russian Federation for state support of young Russian scientists - candidates of sciences MK-1408.2018.8. Grant Agreement No. 075-15-2019-584.
Entwicklung eines Durchfluss-Multitestersystems zur Beobachtung von Kultivierungsprozessen in der Biotechnologie
Creators: name: Rehbock, Christoph
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Flow-injection analysis
subject: flow-through multitester system
subject: cultivation processes
subject: Fließinjektionsanalyse
subject: Durchfluss-Multitestersystem
subject: Kultivierungsprozesse
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Laserstrahllöten von umformfähigen hybriden Platinen aus Stahl-Aluminium-Mischverbindungen
Creators: name: Haar, Christian Von Der
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Weight reduction
subject: material mix
subject: deep drawing
subject: corrosion
subject: steel
subject: brazing
subject: tailored hybrid blank
subject: Leichtbau
subject: Laser
subject: Mischverbindung
subject: Tiefziehen
subject: Korrosion
subject: Stahl
subject: Aluminium
subject: Löten
subject: Dewey Decimal Classification::600 | Technik::670 | Industrielle und handwerkliche Fertigung

description: [no abstract]
Direct imaging of shock wave splitting in diamond at Mbar pressure
Creators: name: Makarov, Sergey
name: Dyachkov, Sergey
name: Pikuz, Tatiana
name: Katagiri, Kento
name: Nakamura, Hirotaka
name: Zhakhovsky, Vasily
name: Inogamov, Nail
name: Khokhlov, Victor
name: Martynenko, Artem
name: Mabey, Paul
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Phase transitions
subject: Equations of state
subject: Planet formation
subject: 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik

description: Understanding the behavior of matter at extreme pressures of the order of a megabar (Mbar) is essential to gain insight into various physical phenomena at macroscales—the formation of planets, young stars, and the cores of super-Earths, and at microscales—damage to ceramic materials and high-pressure plastic transformation and phase transitions in solids. Under dynamic compression of solids up to Mbar pressures, even a solid with high strength exhibits plastic properties, causing the induced shock wave to split in two: an elastic precursor and a plastic shock wave. This phenomenon is described by theoretical models based on indirect measurements of material response. The advent of x-ray free-electron lasers (XFELs) has made it possible to use their ultrashort pulses for direct observations of the propagation of shock waves in solid materials by the method of phase-contrast radiography. However, there is still a lack of comprehensive data for verification of theoretical models of different solids. Here, we present the results of an experiment in which the evolution of the coupled elastic–plastic wave structure in diamond was directly observed and studied with submicrometer spatial resolution, using the unique capabilities of the x-ray free-electron laser (XFEL). The direct measurements allowed, for the first time, the fitting and validation of the 2D failure model for diamond in the range of several Mbar. Our experimental approach opens new possibilities for the direct verification and construction of equations of state of matter in the ultra-high-stress range, which are relevant to solving a variety of problems in high-energy-density physics.
Contingency Analysis of a Grid of Connected EVs for Primary Frequency Control of an Industrial Microgrid Using Efficient Control Scheme
Creators: name: Sabhahit, J. N.
name: Solanke, S. S.
name: Jadoun, V. K.
name: Malik, H.
name: Márquez, F. P. García
name: Pinar-Pérez, J. M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: After over a century of internal combustion engines ruling the transport sector, electric vehicles appear to be on the verge of gaining traction due to a slew of advantages, including lower operating costs and lower CO2 emissions. By using the Vehicle-to-Grid (or Grid-to-Vehicle if Electric vehicles (EVs) are utilized as load) approach, EVs can operate as both a load and a source. Primary frequency regulation and congestion management are two essential characteristics of this technology that are added to an industrial microgrid. Industrial Microgrids are made up of different energy sources such as wind farms and PV farms, storage systems, and loads. EVs have gained a lot of interest as a technique for frequency management because of their ability to regulate quickly. Grid reliability depends on this quick reaction. Different contingency, state of charge of the electric vehicles, and a varying number of EVs in an EV fleet are considered in this work, and a proposed control scheme for frequency management is presented. This control scheme enables bidirectional power flow, allowing for primary frequency regulation during the various scenarios that an industrial microgrid may encounter over the course of a 24-h period. The presented controller will provide dependable frequency regulation support to the industrial microgrid during contingencies, as will be demonstrated by simulation results, achieving a more reliable system. However, simulation results will show that by increasing a number of the EVs in a fleet for the Vehicle-to-Grid approach, an industrial microgridś frequency can be enhanced even further.
description: Published in energies (MDPI) 2022
Myosotis silvatica
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: K. silvatica (L.) Duby Cat. 182. Verbreitet (auch Simplonsüdseite); bis 2400 m. Var. dolichophylla Briq. - 3: Pfyn (P.). Var. serrigera Briq. - l: Tanay (F.); Le Chätelard (Wilczek und Coquoz). Var. praesignis (Beck) Briq. - l: Port-Valais (Burnat); Mont-Ravoire (Beauverd). - 2: Six Carro ob Branson (Garns); Wolfstritt ob Leukerbad (Chenevard); zwischen IVtund und Naters (Christ). 3: Liddes (Beauverd); Boveyre ob Bourg-St-Pierre, 2400 m (Melly); ob Saxon (Chenevard); Mayens-de-Sion (Christ); ob Visperterminen (Beauverd); Berisal (Chenevard). - 4: Binntal: Heiligkreuz (Burnat und Cavillier) und am Lehmbach ob Imfeld (Becherer); Rappental (B. C. W.). Var. Wilczekii Briq. et Cavill. - 2: Zwischen Goppenstein und Ferden (Briquet und Cavillier). Var. pachyderma Briq. - 3: Orsieres (Melly); Bourg-St-Pierre (idem). Var. Sendtneri (Brügger) Wohlfarth - l: Grammont (Hayek in Hegi; P.); Val du Trient (Wilczek und Coquoz). Var. crinita Briq. - l: Grammont (Briquet). Var. succisoides Briq. - l: Mont-Ravoire (Beauverd). Var. Gaudini Briq. - l: Zwischen dem Grammont und dem Lac de Lovenex (Briquet).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Effects of Twisted Noncommutativity in Multi-particle Hamiltonians
Creators: name: Kuznetsova, Zhanna
name: Toppan, Francesco
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The noncommutativity induced by a Drinfel'd twist produces Bopp-shift like transformations for deformed operators. In a single-particle setting the Drinfel'd twist allows to recover the noncommutativity obtained from various methods which are not based on Hopf algebras. In multi-particle sector, on the other hand, the Drinfel'd twist implies novel features. In conventional approaches to noncommutativity, deformed primitive operators are postulated to act additively. A Drinfel'd twist implies non-additive effects which are controlled by the coproduct. We illustrate these features for a class of (abelian twist-deformed) 2D Hamiltonians. Suitable choices of the parameters lead to the Hamiltonian of the noncommutative Quantum Hall Effect, the harmonic oscillator, the quantization of the configuration space. The non-additive effects in the multi-particle sector, leading to results departing from the existing literature, are pointed out.
description: 11 pages
Beyond position weight matrices: nucleotide correlations in transcription factor binding sites and their description
Creators: name: Santolini, Marc
name: Mora, Thierry
name: Hakim, Vincent
Publisher: name: arXiv
Year: 2013
Subjects: subject: Genomics (q-bio.GN)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Biological Physics (physics.bio-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: The identification of transcription factor binding sites (TFBSs) on genomic DNA is of crucial importance for understanding and predicting regulatory elements in gene networks. TFBS motifs are commonly described by Position Weight Matrices (PWMs), in which each DNA base pair independently contributes to the transcription factor (TF) binding, despite mounting evidence of interdependence between base pairs positions. The recent availability of genome-wide data on TF-bound DNA regions offers the possibility to revisit this question in detail for TF binding {\em in vivo}. Here, we use available fly and mouse ChIPseq data, and show that the independent model generally does not reproduce the observed statistics of TFBS, generalizing previous observations. We further show that TFBS description and predictability can be systematically improved by taking into account pairwise correlations in the TFBS via the principle of maximum entropy. The resulting pairwise interaction model is formally equivalent to the disordered Potts models of statistical mechanics and it generalizes previous approaches to interdependent positions. Its structure allows for co-variation of two or more base pairs, as well as secondary motifs. Although models consisting of mixtures of PWMs also have this last feature, we show that pairwise interaction models outperform them. The significant pairwise interactions are found to be sparse and found dominantly between consecutive base pairs. Finally, the use of a pairwise interaction model for the identification of TFBSs is shown to give significantly different predictions than a model based on independent positions.
Chemische und chemoenzymatische Synthesezugänge zu neuen Ansamitocinderivaten
Creators: name: Harmrolfs, Kirsten Rebekka
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Ansamitocins
subject: mutasynthesis
subject: Huisgen-cycloaddition
subject: Negishi-coupling
subject: Ansamitocine
subject: Mutasynthese
subject: Huisgen-Cycloaddition
subject: Negishi-Kupplung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
In vivo facilitated diffusion model
Creators: name: Bauer, Max
name: Metzler, Ralf
Publisher: name: arXiv
Year: 2013
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Under dilute in vitro conditions transcription factors rapidly locate their target sequence on DNA by using the facilitated diffusion mechanism. However, whether this strategy of alternating between three-dimensional bulk diffusion and one-dimensional sliding along the DNA contour is still beneficial in the crowded interior of cells is highly disputed. Here we use a simple model for the bacterial genome inside the cell and present a semi-analytical model for the in vivo target search of transcription factors within the facilitated diffusion framework. Without having to resort to extensive simulations we determine the mean search time of a lac repressor in a living E. coli cell by including parameters deduced from experimental measurements. The results agree very well with experimental findings, and thus the facilitated diffusion picture emerges as a quantitative approach to gene regulation in living bacteria cells. Furthermore we see that the search time is not very sensitive to the parameters characterizing the DNA configuration and that the cell seems to operate very close to optimal conditions for target localization. Local searches as implied by the colocalization mechanism are only found to mildly accelerate the mean search time within our model.
description: 19 pages, 9 figures, Supplementary Information directly included
Detecting semi-arid forest decline using time series of Landsat data
Creators: name: Shafeian, Elham
name: Fassnacht, Fabian Ewald
name: Latifi, Hooman
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: forest decline
subject: Landsat time series
subject: random forest
subject: anomaly
subject: Sen’s slope
subject: semi-arid
subject: 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften

description: Detecting forest decline is crucial for effective forest management in arid and semi-arid regions. Remote sensing using satellite image time series is useful for identifying reduced photosynthetic activity caused by defoliation. However, current studies face limitations in detecting forest decline in sparse semi-arid forests. In this study, three Landsat time-series-based approaches were used to distinguish non-declining and declining forest patches in the Zagros forests. The random forest was the most accurate approach, followed by anomaly detection and the Sen’s slope approach, with an overall accuracy of 0.75 (kappa = 0.50), 0.65 (kappa = 0.30), and 0.64 (kappa = 0.30), respectively. The classification results were unaffected by the Landsat acquisition times, indicating that rather, environmental variables may have contributed to the separation of declining and non-declining areas and not the remotely sensed spectral signal of the trees. We conclude that identifying declining forest patches in semi-arid regions using Landsat data is challenging. This difficulty arises from weak vegetation signals caused by limited canopy cover before a bright soil background, which makes it challenging to detect modest degradation signals. Additional environmental variables may be necessary to compensate for these limitations.
Current temperatures limit the potential impact of a commonly traded predatory gastropod
Creators: name: Dickey, James W. E.
name: Jeschke, Jonathan M.
name: Steffen, Gregor T.
name: Kazanavičiūtė, Elžbieta
name: Brennan, Reid S.
name: Briski, Elizabeta
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Anentome helena
subject: ecological impact
subject: functional response
subject: invasive alien species
subject: molecular identification
subject: pet trade
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: The pet trade has facilitated the spread of invasive alien species (IAS) globally, with negative consequences for biodiversity. The prediction of impacts is a major goal for invasion ecologists, and is especially crucial in an industry often lacking knowledge about traded species. We focused on the predatory gastropod Anentome helena, a species originating in south-east Asia and traded around the world, but with taxonomic uncertainty. We first set out to determine where our study organism fell within the A. “helena” species complex, known to comprise at least four cryptic species, before assessing the effect of temperature on the number of prey, the pulmonate snail Physella acuta, killed per predator via functional response experiments at two temperatures. We used 22 °C as a recommended temperature for housing the species in captivity, and 18 °C as a representative summer lake temperature in temperate climates of Europe. We also assessed the role of predator group size (1×, 2×, 3×) on predation (total consumption and average per capita consumption) at the experimental temperatures with fixed densities of prey, as well as the effect of these temperatures on prey activity. Our organisms belonged to a cryptic species originating from Thailand (Anentome sp. A), matching the findings of aquarium trade samples in other continents. In the functional response experiments, we found maximum feeding rate to be significantly reduced at the lower temperature. A similar result ensued from group feeding, with total consumption significantly reduced and the reduction in average per capita consumption approaching significance at the lower temperature. There was no significant effect of group size on the average per capita consumption in the group trial, indicating neutral conspecific interactions. No significant effect of temperature on the activity of the prey species was found, suggesting decreased consumption was mainly driven by predator, rather than prey. These results suggest limited A. helena impacts in the short-term, but increasing temperatures with climate change may facilitate greater consequences from releases. We suggest future studies assess other potential predatory impacts and survival across relevant abiotic conditions, and encourage the use of similar methods to assess the impacts of other commonly traded species.