cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Innerstädtische Flusslandschaften als integriertes Handlungsfeld - Planungspraktische Einflussfaktoren der Koordination und Kooperation
Creators: name: Galler, Carolin
name: Levin-Keitel, Meike
Publisher: name: Heidelberg : Springer
Year: 2016
Subjects: subject: Integrierte räumliche Planung
subject: Wasserwirtschaft
subject: Stadtplanung
subject: Kooperation
subject: Planungskultur
subject: Dewey Decimal Classification::700 | Künste, Bildende Kunst allgemein::710 | Landschaftsgestaltung, Raumplanung

description: Innerstädtische Flusslandschaften können als Räume verstanden werden, an denen unterschiedliche raumbedeutsame Nutzungen und Belange wie beispielsweise Hochwasserschutz, Naturschutz, Tourismus und Naherholung, Denkmalschutz, Siedlungsentwicklung oder Klimaschutz aufeinanderstoßen. Hier werden integrierte Planungen zur Steuerung der räumlichen Entwicklungen benötigt, für die eine Kooperation von Akteuren verschiedener Verwaltungseinheiten erforderlich ist. Dieser Beitrag widmet sich zunächst den institutionellen Voraussetzungen für kollaborative Planungen im Handlungsraum Flusslandschaften. Dazu werden die Verwaltungsorganisation und die rechtlich verankerten Aufgaben und Planungsinstrumente analysiert. Basierend auf einem planungskulturellen Analyseansatz werden sodann weitere, informelle und eher kulturell geprägte Einflussfaktoren der Zusammenarbeit einbezogen. Am Beispiel der Planungen für die integrierte Entwicklung der Flusslandschaften in Nürnberg und Regensburg werden insbesondere einzelne Charakteristika der Schlüsselorganisationen Wasserwirtschaftsamt und Stadtverwaltung anhand ihrer Handlungsmaximen, ihrer organisationsspezifischen Wahrnehmungen und Bewertungen sowie ihres jeweiligen Selbstverständnisses dargelegt. Es wird deutlich, dass das sogenannte gemeinsame Prozess-Paradigma, also wie die Kooperation im Handlungsfeld innerstädtischer Flusslandschaften vonstattengeht, eine wesentliche Rolle bei der Ausgestaltung der Planungsprozesse und nicht zuletzt auch für die Entwicklung und Gestaltung des Raumes selbst spielt. Es werden Handlungsmöglichkeiten identifiziert, um integrierte Planungsprozesse zu gestalten und zu steuern.
Biegen - Quo vadis
Creators: name: Engel, Bernd
Publisher: name: Universitätsbibliothek Siegen
Year: 2023
Subjects: subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: Biegen in Siegen
subject: Biegen

description: Bereits seit 20 Jahren haben wir unter dem Motto „Biegen in Siegen“ der Biege-Community eine Plattform gegeben. Neben dem Austausch auf den Biegeforen haben wir einen VDI-Fachausschuss „Biegetechnik“ FA 113 initiiert, der technische Richtlinien zum Profilbiegen gemeinschaftlich erarbeitet hat. Nach Corona haben wir mit dem 6. Biegeforum ein neues Format geschaffen, in dem wir neben der Industrie nun auch den Wissenschaftlern einen eigenen Schwerpunkt am Forum gegeben haben. Wir haben hierbei einen Spagat versucht, der einerseits die Möglichkeit bietet, Forschungsinhalte zum Biegen in gebundener Form zu sammeln und andererseits die Bedürfnisse der Industrie nicht abzukoppeln. Durch die Vortragsthemen und die offensichtlich sehr enge Bindung der Forschungsthemen an die Industrie haben die Autoren schon selbst diesen Spagat erfolgreich geleistet. Ich freue mich somit, Ihnen eine Sammlung spannender und hochaktueller Forschungsergebnisse zum Biegen präsentieren zu können. (Vorwort von Prof. Dr.-Ing. Bernd Engel)
Solid-solid collapse transition in a two dimensional model molecular system
Creators: name: Singh, Rakesh S.
name: Bagchi, Biman
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Solid-solid collapse transition in open framework structures is ubiquitous in nature. The real difficulty in understanding detailed microscopic aspects of such transitions in molecular systems arises from the interplay between different energy and length scales involved in molecular systems, often mediated through a solvent. In this work we employ Monte Carlo (MC) simulations to study the collapse transition in a model molecular system interacting via both isotropic as well as anisotropic interactions having different length and energy scales. The model we use is known as Mercedes-Benz (MB) which for a specific set of parameters sustains three solid phases: honeycomb, oblique and triangular. In order to study the temperature induced collapse transition, we start with a metastable honeycomb solid and induce transition by heating. High density oblique solid so formed has two characteristic length scales corresponding to isotropic and anisotropic parts of interaction potential. Contrary to the common believe and classical nucleation theory, interestingly, we find linear strip-like nucleating clusters having significantly different order and average coordination number than the bulk stable phase. In the early stage of growth, the cluster grows as linear strip followed by branched and ring-like strips. The geometry of growing cluster is a consequence of the delicate balance between two types of interactions which enables the dominance of stabilizing energy over the destabilizing surface energy. The nuclei of stable oblique phase are wetted by intermediate order particles which minimizes the surface free energy. We observe different pathways for pressure and temperature induced transitions.
Immunologische und immunhistochemische Charakterisierung des neuen humanen [beta]-Defensins hBD17
Creators: name: Jübner, Martin
Publisher: name: Hannover : Universität
Year: 2004
Subjects: subject: Innate immunity
subject: antimicrobial peptides
subject: defensins
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: [no abstract]
title: Variational Principles of Fluid Mechanics and Electromagnetism: Imposition and Neglect of the Lin Constraint
Creators: name: Allen, Ross Roundy Jr.
Publisher: name: Utah State University
Year: 1987

description: Variational principles in classical fluid mechanics and electromagnetism have sprinkled the literature since the eighteenth century. Even so, no adequate variational principle in the Eulerian description of matter was had until 1968 when an Eulerian variational principle was introduced which reproduces Euler's equation of fluid dynamics. Although it successfully produces the appropriate equation of motion for a perfect fluid, the variational principle requires imposition of a constraint which was not fully understood at the time the variational principle was introduced. That constraint is the Lin constraint. The Lin constraint has subsequently been utilized by a number of authors who have sought to develop Eulerian variational principles in both fluid mechanics and electromagnetics (or plasmadynamics). How-ever, few have sought to fully understand the constraint.

This dissertation first reviews the work of earlier authors concerning the development of variational principles in both the Eulerian and Lagrangian nomenclatures. In the process, it is shown rigorously whether or not the Euler-Lagrange equations which result from the variational principles are equivalent to the generally accepted equations of motion. In particular, it is shown in the case of several Eulerian variational principles that imposition of the Lin constraint results in Euler-Lagrange equations which are equivalent to the generally accepted equations of motion. On the other hand, it is shown that neglect of the Lin constraint results in Euler-Lagrange equations restrictive of the generally accepted equations of motion.

In an effort to improve the physical motivation behind introduction of the Lin constraint a new variational constraint is developed based on the concept of surface forces within a fluid. The new constraint has the advantage of producing Euler-Lagrange equations which are globally correct whereas the Lin constraint itself allows only local equivalence to the standard classical equations of fluid motion.

Several additional items of interest regarding variational principles are presented. It is shown that a quantity often referred to as "the canonical momentum" of a charged fluid is not always a constant of the motion of the fluid. This corrects an error which has previously appeared in the literature. In addition, it is demonstrated that there does not exist an unconstrained Eulerian variational principle giving rise to the generally accepted equations of motion for both a perfect fluid and a cold, electromagnetic fluid.
Evidence of a vegan diet for health benefits and risks – an umbrella review of meta-analyses of observational and clinical studies
Creators: name: Selinger, Eliška
name: Neuenschwander, Manuela
name: Koller, Alina
name: Gojda, Jan
name: Kühn, Tilman
name: Schwingshackl, Lukas
name: Barbaresko, Janett
name: Schlesinger, Sabrina
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: To summarize and evaluate the evidence on the health impact of a vegan diet, we conducted an umbrella review of systematic reviews and meta-analyses. PubMed, Cochrane Library, Web of Science and Epistemonikos were searched up to September 2021. Meta-analyses were recalculated by using a random effects model. The certainty of evidence (CoE) was evaluated by the GRADE approach. For the general healthy population, a vegan diet was effective for reducing body weight [MD (95% CI): −2.52 kg (−3.06, −1.98), n = 8 RCTs; moderate CoE] and was associated with further health benefits (with low CoE), including a lower risk of cancer incidence [SRR (95% CI): 0.84 (0.75, 0.95), n = 2] and a trend for lower risk of all-cause mortality [SRR (95% CI): 0.87 (0.75, 1.01), n = 2], as well as lower ApoB levels [MD (95% CI): −0.19 µmol/L (−0.23, −0.15), n = 7 RCTs). The findings suggested adverse associations for a vegan diet with risk of fractures [SRR (95% CI): 1.46 (1.03, 2.07), n = 3; low CoE]. For persons with diabetes or at high CVD risk, a vegan diet reduced measures of adiposity, total cholesterol, LDL and improved glycemic control (CoE moderate to low). A vegan diet may have the potential for the prevention of cardiometabolic health, but it may also impair bone health. More well-conducted primary studies are warranted.
title: Numerical Analysis and Spanwise Shape Optimization for Finite Wings of Arbitrary Aspect Ratio
Creators: name: Hodson, Joshua D.
Publisher: name: Utah State University
Year: 2019

description: This work focuses on the development of efficient methods for wing shape optimization for morphing wing technologies. Existing wing shape optimization processes typically rely on computational fluid dynamics tools for aerodynamic analysis, but the computational cost of these tools makes optimization of all but the most basic problems intractable. In this work, we present a set of tools that can be used to efficiently explore the design spaces of morphing wings without reducing the fidelity of the results significantly. Specifically, this work discusses automatic differentiation of an aerodynamic analysis tool based on lifting line theory, a light-weight gradient-based optimization framework that provides a parallel function evaluation capability not found in similar frameworks, and a modification to the lifting line equations that makes the analysis method and optimization process suitable to wings of arbitrary aspect ratio. The toolset discussed is applied to several wing shape optimization problems. Additionally, a method for visualizing the design space of a morphing wing using this toolset is presented. As a result of this work, a light-weight wing shape optimization method is available for analysis of morphing wing designs that reduces the computational cost by several orders of magnitude over traditional methods without significantly reducing the accuracy of the results.
title: Determinants of Small Rodent Distribution and Abundance in a Shrub-Steppe Ecosystem: Influences of Seeds, Ants and Shrubs
Creators: name: Broome, Linda Suzanne
Publisher: name: Utah State University
Year: 1988

description: This study had two major objectives; firstly to test the hypothesis of ongoing competition for seeds between small rodents and harvester ants, Pogonomyrmex occidental is, in a cold desert ecosystem; secondly to elucidate how seed abundance and shrub cover influence the distribution and abundance of deer mice, Peromyscus maniculatus. The study area was a sagebrush (Artemisia tridentata) dominated shrubsteppe in southwestern Wyoming. Responses of the small mammal community to ant removal and food addition were assessed on replicated study plots between September 1981 and September 1983. Food addition and shrub removal manipulations were continued from September 1983 to August 1984. Rodent populations were sampled by live-trapping. Movements of 40 deermice were followed by radiotracking during the winter, spring and summer of 1983-84.

Ant removal elicited little response from the rodent community, although seed preference trials with native seeds in the field indicated considerable overlap in seed use. concluded that competition was not a factor affecting small rodents during the period of this study, although the area cleared of ants may not have been sufficiently large to produce a response detectable by trapping.

Seed addition resulted in increased deermouse population size, prolonged breeding, decreased winter (but not summer) home range sizes, and during periods of low density, increased grid fidelity. High fall densities were followed by a classical spring decline with associated female sex ratio skew and severe injuries to both sexes. Concluded that deermice were food limited only to the point where social interactions during the breeding season limited maximum densities.

The absence of shrubs prevented winter use of the 1.25 ha cleared area by deermice. At this time on the non-cleared plots shrubs were used to support nests, as foraging sites and as a means of access to the snow surface. During summer the area cleared of shrubs provided attractive foraging habitat, but most nest sites were still located within shrub cover around the edge.

An important corollary of the radio tracking was the illustration of the large home range sizes of deermice in relation to the size of the 0.7 ha trapping grids. The implications of trapping bias affecting population fluctuations and measurement of other demographic parameters from trapping studies are discussed.
title: Robust Resource Allocation to Secure Physical Layer Using UAV-Assisted Mobile Relay Communications in 5G Technology
Creators: name: Ahmed, Shakil
Publisher: name: Utah State University
Year: 2019

description: The unmanned aerial vehicles (UAVs) are also known as drones. Recently, UAVs have attracted the next generation researchers due to their flexible, dynamic, and cost-effective deployment, etc. Moreover, the UAVs have a wide range of application domains, such as rescue operation in the remote area, military surveillance, emergency application, etc. Given the UAVs are appropriately deployed, the UAVs provide continuous and reliable connectivity, on-demand, and cost-effective features to the desired destination in the wireless communication system. Thus, the UAVs can be a great choice to deploy as a mobile relay in co-existence with the base stations (BSs) on the ground to serve the 5G wireless users. In this thesis, the UAV-assisted mobile relay (UAV-MR) in the next generation wireless networks has been studied, which also considers the UAV-MR physical layer security. The proposed system also considers one ground user, one BS on the ground, and active presence of multiple eavesdroppers, situated nearby the ground user. The locations of these nodes (i.e., the ground user, the BS, and the eavesdroppers) are considered fixed on the ground. Moreover, the locations of the eavesdroppers are not precisely known to the UAV-MR. Thus, this thesis aims to maximize the achievable secrecy rate, while the BS sends the secure information to the ground user via the UAV-MR. However, the UAV-MR has some challenges to deploy in wireless networks, such as 3D deployment, robust resource allocation, secure UAV-MR to ground communication, the channel modeling, the UAV-MR flight duration, and the UAV-MR robust trajectory design, etc. Thus, this project investigates the UAV-MR assisted wireless networks, which addresses those technical challenges to guarantee efficient UAV-MR communication. Moreover, the mathematical frameworks are formulated to support the proposed model. An efficient algorithm is proposed to maximize the UAV-MR achievable secrecy rate. Finally, the simulation results show the improved performance for the UAV-MR assisted next-generation networks.
Monte Carlo simulations of dynamic phase transitions in ultrathin Blume-Capel films
Creators: name: Yuksel, Yusuf
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Dynamic phase transition phenomena in ultrathin films described by Blume-Capel model have been investigated using Monte Carlo simulations. Hysteresis loops, micromagnetic structures, and hysteresis loop area curves, as well as dynamic correlation between the magnetization and the external field have been studied as functions of the field, as well as the film parameters. The variation of critical coupling of the modified film surface at which the transition temperature becomes independent of film thickness have been clarified for varying system parameters. Frequency dispersion of hysteresis loop area have been found to obey a power law for low and moderate frequencies for both ordinary and enhanced surfaces.
description: 17 pages, 10 figures
Structure of Carbon Nanotube-dendrimer composite
Creators: name: Vasumathi, V.
name: Pramanik, Debabrata
name: Sood, A. K.
name: Maiti, Prabal K
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Using all atomistic molecular dynamics (MD) simulations we report the microscopic picture of the nanotube-dendrimer complex for PAMAM dendrimer of generation 2 to 4 and carbon nanotube of chirality (6,5). We find compact wrapping conformations of dendrimer onto the nanotube surface for all the three generations of PAMAM dendrimer. The degree of wrapping is more for non-protonated dendrimer compared to the protonated dendrimer. For comparison we also study the interaction of another dendrimer, poly(propyl ether imine) (PETIM), with nanotube and show that PAMAM dendrimer interacts strongly as compared to PETIM dendrimer as is evident from the distance of closest approach as well as the number of close contacts between the nanotube and dendrimer. We also calculate the binding energy between the nanotube and the dendrimer using MM/PBSA methods and attribute the strong binding to the charge transfer between them. Dendrimer wrapping on CNT will make it soluble and can act as an efficient dispersing agent for nanotube.
Studien zur chemoenzymatischen Synthese und Biosynthese von Maytansinoid-Analoga
Creators: name: Brünjes, Marco
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2006
Subjects: subject: Ansamitocin
subject: Actinosynnema pretiosum
subject: Mutasynthese
subject: Naturstoffanaloga
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Ergodic transition in a simple model of the continuous double auction
Creators: name: Radivojević, Tijana
name: Anselmi, Jonatha
name: Scalas, Enrico
Publisher: name: arXiv
Year: 2013
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Probability (math.PR)
subject: FOS: Economics and business
subject: FOS: Mathematics
subject: 60G99

description: We study a phenomenological model for the continuous double auction, equivalent to two independent $M/M/1$ queues. The continuous double auction defines a continuous-time random walk for trade prices. The conditions for ergodicity of the auction are derived and, as a consequence, three possible regimes in the behavior of prices and logarithmic returns are observed. In the ergodic regime, prices are unstable and one can observe an intermittent behavior in the logarithmic returns. On the contrary, non-ergodicity triggers stability of prices, even if two different regimes can be seen.
description: 10 pages, 5 figures, 1 table
A Cross-Country Model for End-Use Specific Aggregated Household Load Profiles
Creators: name: Schlemminger, Marlon
name: Niepelt, Raphael
name: Brendel, Rolf
Publisher: name: Basel : MDPI
Year: 2021
Subjects: subject: energy system modelling
subject: household load profile
subject: neural network
subject: end-uses
subject: consumer behavior
subject: cross-country
subject: open data
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: End-use specific residential electricity load profiles are of interest for energy system modelling that requires future load curves or demand-side management. We present a model that is applicable across countries to predict consumption on a regional and national scale, using openly available data. The model uses neural networks (NNs) to correlate measured consumption from one country (United Kingdom) with weather data and daily profiles of a mix of human activity and device specific power profiles. We then use region-specific weather data and time-use surveys as input for the trained NNs to predict unscaled electric load profiles. The total power profile consists of the end-use household load profiles scaled with real consumption. We compare the model’s results with measured and independently simulated profiles of various European countries. The NNs achieve a mean absolute error compared with the average load of 6.5 to 33% for the test set. For Germany, the standard deviation between the simulation, the standard load profile H0, and measurements from the University of Applied Sciences Berlin is 26.5%. Our approach reduces the amount of input data required compared with existing models for modelling region-specific electricity load profiles considering end-uses and seasonality based on weather parameters. Hourly load profiles for 29 European countries based on four historical weather years are distributed under an open license.
The Ionized Absorber and Nuclear Environment of IRAS 13349+2438: Multi-wavelength insights from coordinated Chandra HETGS, HST STIS, HET, and Spitzer IRS
Creators: name: Lee, Julia C.
name: Kriss, Gerard
name: Chakravorty, Susmita
name: Rahoui, Farid
name: Young, Andrew J.
name: Brandt, William N.
name: Hines, Dean C.
name: Ogle, Patrick M.
name: Reynolds, Christopher S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present results from a coordinated IR-to-X-ray spectral campaign of the QSO IRAS 13349+2438. Optical spectra reveal extreme Eigenvector-1 characteristics, but the H-beta line width argues against a NLS1 classification; we refine z=0.10853 based on [O III]. We estimate a BH mass=10^9 Msun using 2 independent methods (H-beta line width & SED fits). Blue-shifted absorption (-950km/s & -75km/s) is seen for the 1st time in STIS UV spectra from Ly-alpha, NV, & CIV. The higher velocity UV lines are coincident with the lower-ionisation (xi~1.6) X-ray warm absorber lines. A dusty multiple ionization absorber blueshifted by 700-900km/s is required to fit the X-ray data. Theoretical models comparing different ionising SEDs reveal that a UV-inclusive (i.e., the accretion disc) ionising continuum strongly impacts conclusions for the thermodynamic stability of the warm absorber. Specific to IRAS13349, an Xray-UV ionising SED favors a continuous distribution of ionisation states in a smooth flow (this paper), versus discrete clouds in pressure equilibrium (work by others where UV is omitted). Direct dust detections are seen in both the IR: PAH emission at (7.7 & 11.3)micron which may also be blended with forsterite, and (10 & 18)micron silicate emission, and X-rays: iron dust with a dust-to-gas ratio > 90%. We develop a geometrical model whereby the QSO nuclear region is viewed through the upper atmosphere of an obscuring torus. This sight line is obscured by dust that blocks a direct view of the UV/optical emission region but is largely transparent in X-rays since the gas is ionised. In our model, 20% of the intrinsic UV/optical continuum is scattered into our sight line by the far wall of an obscuring torus. An additional 2.4% of the direct light, which likely dominates the UV emission, is Thomson-scattered into our line-of-sight by another off-plane component of highly ionized gas.
description: Accepted for publication to MNRAS 2013 January 8. Received 2013 January 7; in original form 2012 August 20. 31 MNRAS pages
Performance of thermally modified timber (TMT) in outdoor application - durability, abrasion and optical appearance
Creators: name: Welzbacher, Christian R.
name: Brischke, Christian
name: Rapp, Andreas O.
name: Koch, Silvia
name: Hofer, Sabine
Publisher: name: Zagreb : Zagreb Univ, Fac. Forestry
Year: 2009
Subjects: subject: blue stain
subject: cracks
subject: decking
subject: facade
subject: weathering
subject: heat-treatment
subject: wood
subject: Dewey Decimal Classification::600 | Technik::670 | Industrielle und handwerkliche Fertigung
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Thermally modified timber (TMT) is increasingly offered in Europe as an alternative to preservative treated timber. TMT durability, infield tests as well as its moisture sorption behaviour in facade application was determined so as to consider its suitability for outdoor use. Additionally, abrasion and crack-formation of TMT deckings were examined and the optical appearance of a TMT facade was evaluated after 5 years of service. After 7.5 years exposure in ground contact, the various TMT materials tested were classed as "slightly durable" to "not durable" whereas the classification in above ground exposure was "very durable" to "moderately, durable", which was in line with the reduced moisture sorption of TMT in weathered application. Moreover, the TMT-decking showed less abrasion and crack-formation compared to references, though the TMT facade revealed considerable discoloration by weathering. Hence, the suitability of TMT for above ground use is suggested, but a surface treatment is obligatory if discoloration is objectionable.
Surface plasmons in coaxial metamaterial cables
Creators: name: Kushwaha, Manvir S.
name: Djafari-Rouhani, Bahram
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Thanks to Victor Veselago for his hypothesis of negative index of refraction, metamaterials -- engineered composites -- can be designed to have properties difficult or impossible to find in nature: they can have both electrical permitivity ($ε$) and magnetic permeability ($μ$) simultaneously negative. The metamaterials -- henceforth negative-index materials (NIMs) -- owe their properties to subwavelength structure rather than to their chemical composition. The tailored electromagnetic response of the NIMs has had a dramatic impact on the classical optics: they are becoming known to have changed many basic notions related with the electromagnetism. The present article is focused on gathering and reviewing the fundamental characteristics of plasmon propagation in the coaxial cables fabricated of the right-handed medium (RHM) [with $ε>0$, $μ>0$] and the left-handed medium (LHM) [with $ε<0$, $μ<0$] in alternate shells starting from the innermost cable. Such structures as conceived here may pave the way to some interesting effects in relation to, e.g., the optical science exploiting the cylindrical symmetry of the coaxial waveguides that make it possible to perform all major functions of an optical fiber communication system in which the light is born, manipulated, and transmitted without ever leaving the fiber environment, with precise control over the polarization rotation and pulse broadening. The review also covers briefly the nomenclature, classification, potential applications, and the limitations (related, e.g., to the inherent losses) of the NIMs and their impact on the classical electrodynamics, in general, and in designing the cloaking devices, in particular. Recent surge in efforts on invisibility and the cloaking devices seems to have spoiled the researchers worldwide:
title: Use of Landsat Imagery and Geographical Information Systems in the Assessment of Rangeland Cover and Wildlife Habitat
Creators: name: Hunnicutt, Mary
Publisher: name: Utah State University
Year: 1992

description: The first chapter of this thesis reviews applications of satellite remote sensing and geographical information systems (GIS) in wildlife studies. The simpler uses of remote sensing are for habitat mapping, often using satellite imagery classified for other natural resources. More sophisticated applications incorporate remotely sensed data into a GIS for the digital manipulation of data planes. The most advanced applications are those which use remote sensing and GIS in models predicting habitat quality or population levels.

The second chapter reports how brightness values of six Landsat Thematic Mapper (TM) bands were used in multiple linear regressions to predict percent cover of six rangeland components. Regression equations were applied to TM imagery to create cover maps for live shrub, dead and live shrub, sagebrush, forb/grass, forb, and bare ground/rock. Accuracy was assessed at two levels and ranged from 55 to 90%.

The third chapter presents results of sage grouse surveys used with satellite data and GIS to assess habitat use patterns. Habitats used by grouse were compared to availability in the landscape for continuous images of rangeland cover variables, for discrete images of rangeland classes, and for habitat diversity values. Overall, results were comparable to those in studies using traditional methods.
Einfluss der Herstellungsroute auf die Umformbarkeit von Cr-Mn-Verbundwerkstoffen für das Presshärten
Creators: name: Stennei, Markus
name: Grodotzki, Joshua
name: Tekkaya, A. Erman
Publisher: name: Universitätsbibliothek Siegen
Year: 2023
Subjects: subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: Presshärten
subject: Wärmebehandlung
subject: Verbundwerkstoffe
subject: Biegeversuche
subject: Biegen

description: The analysis of bending properties of a new composite material for press hardening is presented in this paper. This composite material consists of a boron-Magan core (22MnB5) and a stainless-steel cover layer. The core material is the typical press hardening material for industrial applications. Two different types of top layer are considered, an austenitic (1.4301) and a martensitic (1.4021) stainless steel. Initial investigations have shown that the manufacturing of the roll clad semi-finished product leads to low the formability of the cover layer materials. In this analysis, different heat treatment strategies have been added to the process route and their influence on the formability is investigated. For this purpose, a 3-point bending test with optical strain measurement system is developed. The test setup allows the accurate determination of the strain at failure of the cover layer at room temperature. It is shown that neither heat treatment after hot rolling nor intermediate annealing during cold rolling improves formability. The highest degree of forming on the outer bend is obtained with a process route without heat treatment. Even in this particular case, the remaining formability is about 50 % lower compared with the values achieved by the untreated material of the cover layer. No reduction in bond strength due to heat treatment was observed. The formability results indicate that further analysis of the entire process chain and the associated diffusion processes is necessary to understand the remaining underperformance of the composite material.
Numerical simulation of the Tayler instability in liquid metals
Creators: name: Weber, Norbert
name: Galindo, Vladimir
name: Stefani, Frank
name: Weier, Tom
name: Wondrak, Thomas
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The electrical current through an incompressible, viscous and resistive liquid conductor produces an azimuthal magnetic field that becomes unstable when the corresponding Hartmann number exceeds a critical value in the order of 20. This Tayler instability, which is not only discussed as a key ingredient of a non-linear stellar dynamo model (Tayler-Spruit dynamo), but also as a limiting factor for the maximum size of large liquid metal batteries, was recently observed experimentally in a column of a liquid metal (Seilmayer et al., Phys. Rev. Lett. 108, 244501, 2012}. On the basis of an integro-differential equation approach, we have developed a fully three-dimensional numerical code, and have utilized it for the simulation of the Tayler instability at typical viscosities and resistivities of liquid metals. The resulting growth rates are in good agreement with the experimental data. We illustrate the capabilities of the code for the detailed simulation of liquid metal battery problems in realistic geometries.
description: 19 pages, 16 figures
title: Archäologische Informationen, Vol 8, No 1 (1985): Archäologische Informationen
Creators: name: DGUF E.V.
Publisher: name: University Library Heidelberg
Year: 2016

description: Experimente
description: Experimente
description: Titel
 Vorwort...4-5
 Inhalt...6-7
 Eine experimentelle Getreideernte mit rekonstruierten bandkeramischen Kompositgeräten...18-21
 Praktische Versuche zur neolithischen Klingenproduktion. Ein Beitrag zur Frage der sog. Punchtechnik...22-33
 Der Lochplattenofen von Weddinghusen. Experiment und Deutung...48-53
 Grabungsbegleitende Rekonstruktion eines frühmittelalterlichen Hofplatzes in Münster-Gittrup...74-75
 Römer und Germanen...79
 Die Steinartefakte des jungpaläolithischen Fundplatzes Spendlingen (Rhh.)...80-81
 Typologie und Funktion neolithischer Öfen in Mittel- und Südosteuropa...82-84
 Jean M. Auel, Das Tal der Pferde - Ein Roman aus der Frühzeit des Menschen, München 1984...87-89
 Nachrichten...90-91
Interrelationship between static and dynamic strength properties of wood and its structural integrity [Međusobna ovisnost statičkih i dinamičkih svojstava čvrstoće drva i njegova strukturnog integriteta]
Creators: name: Brischke, Christian
Publisher: name: Zagreb : University of Zagreb, Faculty of Forestry
Year: 2017
Subjects: subject: High-energy multiple impact (HEMI) tests
subject: Impact bending strength
subject: Modulus of elasticity
subject: Resistance to impact milling (RIM)
subject: Bending strength
subject: Bending tests
subject: Elastic moduli
subject: Hardwoods
subject: Impact strength
subject: Milling (machining)
subject: Structural integrity
subject: Structural properties
subject: Wood
subject: Wood products
subject: Dynamic strength
subject: Functional performance
subject: High sensitivity
subject: Multiple impact
subject: Natural variation
subject: Standardized tests
subject: Strength property
subject: Vibratory mill
subject: Wood chemicals
subject: Dewey Decimal Classification::600 | Technik::670 | Industrielle und handwerkliche Fertigung

description: Various biotic and abiotic agents affect the performance of wood products. Chemicals, thermal energy, radiation, as well as different organisms have the potential to alter the optical, haptic and functional performance of wood. These effects come along with a change of structural integrity of wood, which in turn affects its strength properties. Therefore, a test was developed to quantify the structural integrity of wood in terms of its Resistance to Impact Milling (RIM). In a High-Energy Multiple Impact (HEMI) - test, steel balls were used in a heavy vibratory mill for crushing wood samples. Thousands of single events were captured by analyzing the fragments. Based on the degree of integrity and the percentage of fine fragments (< 1mm), an indicator has been defined to detect structural changes on cell wall level with high sensitivity. The aim of this study was to investigate the variation of structural integrity within and between ten different wood species in comparison with some strength properties according to standardized test protocols and in dependence of wood density. HEMI-tests, bending tests, and impact bending tests were performed with matched specimens. Wood density turned out to have only a subsidiary effect on structural integrity, but is dominanting standard strength properties. Thus, RIM was found to be only slightly correlated with the impact bending strength (IBS) and bending strength (MOR). On the other hand, the method shows clear insensitivity to natural variation in anatomy of wood.
Geometric post-Newtonian description of spin-half particles in curved spacetime
Creators: name: Alibabaei, Ashkan
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität
Year: 2022
Subjects: subject: quantum systems under gravity
subject: post-Newtonian expansion
subject: weak gravity
subject: Fermi normal coordinates
subject: Dirac equation
subject: Quantensysteme unter Gravitation
subject: post-Newton’sche Entwicklung
subject: schwache Gravitation
subject: Fermi-Normalkoordinaten
subject: Dirac-Gleichung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Einstein Equivalence Principle (EEP) requires all matter components to universally couple to gravity via a single common geometry: that of spacetime. This relates quantum theory with geometry as soon as interactions with gravity are considered. In this work, I study the geometric theory of coupling a spin-1/2 particle to gravity in a twofold expansion scheme: First with respect to the distance based on Fermi normal coordinates around a preferred worldline (e.g., that of a clock in the laboratory), second with respect to 1/c (post-Newtonian expansion). I consider the one-particle sector of a massive spinor field in QFT, here described effectively by a classical field. The formal expansion in powers of 1/c yields a systematic and complete generation of GR corrections for quantum systems. I find new terms that were overlooked in the literature at order 1/c and extended the level of approximation to the next order. These findings are significant for a consistent inclusion of gravity corrections in the description of quantum experiments of corresponding sensitivities, and also for testing aspects of GR, like the EEP, in the quantum realm.
Preface: Advances and visions in large-scale hydrological modelling: Proceedings of the 11th Workshop on Large-scale Hydrological Modelling
Creators: name: Portmann, F.
name: Berkhoff, K.
name: Hunger, M.
Publisher: name: Göttingen : Copernicus GmbH
Year: 2008
Subjects: subject: Large-scale hydrological modelling
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften::551 | Geologie, Hydrologie, Meteorologie

description: Large-scale hydrological modelling has become increasingly wide-spread during the last decade. An annual workshop series on large-scale hydrological modelling has provided, since 1997, a forum to the German-speaking community for discussing recent developments and achievements in this research area. In this paper we present the findings from the 2007 workshop which focused on advances and visions in large-scale hydrological modelling. We identify the state of the art, difficulties and research perspectives with respect to the themes "sensitivity of model results", "integrated modelling" and "coupling of processes in hydrosphere, atmosphere and biosphere". Some achievements in large-scale hydrological modelling during the last ten years are presented together with a selection of remaining challenges for the future.
Einfluss und Wechselwirkungen der Materialparameter in Formsimulationen faserverstärkter Thermoplaste
Creators: name: Graef, Jasmin
Publisher: name: Universitätsbibliothek Siegen
Year: 2023
Subjects: subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: Faserverstärkte Thermoplaste (FVT)
subject: Formsimulation
subject: Materialcharakterisierung
subject: Faserwinkel
subject: Faltenbildung
subject: Biegen

description: Bauteile aus gewebeverstärkten Thermoplasten (GVT) werden für den Leichtbau im Automobilbereich eingesetzt. Nach Erwärmung oberhalb des Schmelzbereichs lassen sich diese mit Thermoformverfahren zu Bauteilen formen. Die mechanischen Eigenschaften werden durch die nach dem Formprozess im Bauteil vorliegenden Faserwinkel im Verstärkungsgewebe sowie auftretender Falten beeinflusst. Somit liegt ein großes Interesse in der Entwicklung und Verbesserung von Simulationsmethoden zur Vorhersage der Faserwinkel und Faltenbildung. Die eingesetzten FE-Modelle erfordern die Charakterisierung des Materialverhaltens oberhalb der Schmelztemperatur bei verschiedenen Belastungsarten wie Scher-, Zug-, Druck- und Biegebeanspruchung. Aufgrund der Aufheizphasen sind die Materialversuche sehr zeitaufwändig. Im Rahmen von Sensitivitätsanalysen wird der Einfluss der einzelnen Eingabeparameter der Materialkarten sowie deren Wechselwirkungen untersucht. Dies erfolgt zunächst anhand der Simulation der einzelnen Materialversuche und anschließend anhand der Simulation der Bauteilformung eines Demonstrators, um den Einfluss der einzelnen Materialparameter auf die Vorhersagegenauigkeit hinsichtlich Faltenbildung und Faserwinkel bewerten zu können. Das Ziel der Untersuchungen ist die Definition der erforderlichen Materialversuche zur Implementierung in das Simulationsmodell sowie die Erarbeitung von Default-Werten für Materialparameter mit geringem Einfluss auf die Ergebnisse zur Reduktion des Versuchsaufwands.
Cerastium cerastoides
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: C. Cerastoides (L.) Britton (C. trigynum Vill.) Cat. 52. Bis 3100 m: Valsorey (Guyot) und 3130 m: Gornergrat bei Zermatt (Thellung 1919, Braun-Blan- quet 1919). - Untere Verbreitungsgrenze festzustellen (nach JACCARD Cat. angeblich bis 1800m ab- wärts gehend). Var.glandulosum (Fenzl) - 4:Zwischen dem Tällistock und dem Grüngufergrat(Bär).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Kn 26, a New Quadrupolar Planetary Nebula
Creators: name: Guerrero, Martin A.
name: Miranda, Luis F.
name: Ramos-Larios, Gerardo
name: Vazquez, Roberto
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Once classified as an emission line source, the planetary nebula (PN) nature of the source Kn 26 has been only recently recognized in digital sky surveys. To investigate the spectral properties and spatio-kinematical structure of Kn 26, we have obtained high spatial-resolution optical and near-IR narrow-band images, high-dispersion long-slit echelle spectra, and intermediate-resolution spectroscopic observations. The new data reveal an hourglass morphology typical of bipolar PNe. A detailed analysis of its morphology and kinematics discloses the presence of a second pair of bipolar lobes, making Kn 26 a new member of the subclass of quadrupolar PNe. The time-lap between the ejection of the two pairs of bipolar lobes is much smaller than their dynamical ages, implying a rapid change of the preferential direction of the central engine. The chemical composition of Kn 26 is particularly unusual among PNe, with a low N/O ratio (as of type II PNe) and a high helium abundance (as of type I PNe), although not atypical among symbiotic stars. Such an anomalous chemical composition may have resulted from the curtail of the time in the Asymptotic Giant Branch by the evolution of the progenitor star through a common envelope phase.
description: 9 pages, 5 figures, accepted for publication in A&A
Erhöhung der Flexibilisierung des Rotationszugbiegens mit reduzierten Werkzeugen
Creators: name: Heftrich, Christopher
name: Engel, Bernd
Publisher: name: Universitätsbibliothek Siegen
Year: 2023
Subjects: subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: Rotationszugbiegen
subject: Flexibilität
subject: Werkzeugkonstruktion
subject: Rüstprozess
subject: Biegen

description: Die Werkzeugsätze für das Rotationszugbiegen werden nach den Abmessungen der Halbzeuge und den gewünschten Biegeradien ausgelegt. Für mehr Flexibilität können die Werkzeugoberflächen geteilt und verstellbar ausgeführt werden. Ausgehend von der Verteilung der Kontaktnormalspannungen wurden in dieser Arbeit reduzierte Oberflächen abgeleitet. Der Einfluss dieser Oberflächen auf die Qualität der Bögen zeigt die technischen Möglichkeiten der Reduzierung der Werkzeuge auf.
Large spin-orbit coupling in carbon nanotubes
Creators: name: Steele, G. A.
name: Pei, F.
name: Laird, E. A.
name: Jol, J. M.
name: Meerwaldt, H. B.
name: Kouwenhoven, L. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: It has recently been recognized that the strong spin-orbit interaction present in solids can lead to new phenomena, such as materials with non-trivial topological order. Although the atomic spin-orbit coupling in carbon is weak, the spin-orbit coupling in carbon nanotubes can be significant due to their curved surface. Previous works have reported spin-orbit couplings in reasonable agreement with theory, and this coupling strength has formed the basis of a large number of theoretical proposals. Here we report a spin-orbit coupling in three carbon nanotube devices that is an order of magnitude larger than measured before. We find a zero-field spin splitting of up to 3.4 meV, corresponding to a built-in effective magnetic field of 29 T aligned along the nanotube axis. While the origin of the large spin-orbit coupling is not explained by existing theories, its strength is promising for applications of the spin-orbit interaction in carbon nanotubes devices.