cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Viscoelastic and self-healing behavior of silica filled ionically modified poly(isobutylene-co-isoprene) rubber
Creators: name: Sallat, Aladdin
name: Das, Amit
name: Schaber, Jana
name: Scheler, Ulrich
name: Bhagavatheswaran, Eshwaran S.
name: Stöckelhuber, Klaus W.
name: Heinrich, Gert
name: Voit, Brigitte
name: Böhme, Frank
Publisher: name: London : RSC Publishing
Year: 2018
Subjects: subject: styrene-butadiene rubber
subject: cross-linked polymer
subject: carbon-black
subject: elastomers
subject: nanocomposites
subject: reinforcement
subject: composites
subject: ionomers
subject: design
subject: blends
subject: 540

description: Rubber composites were prepared by mixing bromobutyl rubber (BIIR) with silica particles in the presence of 1-butylimidazole. In addition to pristine (precipitated) silica, silanized particles with aliphatic or imidazolium functional groups, respectively, were used as filler. The silanization was carried out either separately or in situ during compounding. The silanized particles were characterized by TGA, 1H-29Si cross polarization (CP)/MAS NMR, and Zeta potential measurements. During compounding, the bromine groups of BIIR were converted with 1-butylimidazole to ionic imidazolium groups which formed a dynamic network by ionic association. Based on DMA temperature and strain sweep measurements as well as cyclic tensile tests and stress-strain measurements it could be concluded that interactions between the ionic groups and interactions with the functional groups of the silica particles strongly influence the mechanical and viscoelastic behavior of the composites. A particularly pronounced reinforcing effect was observed for the composite with pristine silica, which was attributed to acid-base interactions between the silanol and imidazolium groups. In composites with alkyl or imidazolium functionalized silica particles, the interactions between the filler and the rubber matrix form dynamic networks with pronounced self-healing behavior and excellent tensile strength values of up to 19 MPa. This new approach in utilizing filler-matrix interactions in the formation of dynamic networks opens up new avenues in designing new kinds of particle-reinforced self-healing elastomeric materials with high technological relevance.
Exactly solvable models for multiatomic molecular Bose-Einstein condensates
Creators: name: Santos, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: I introduce two family of exactly solvable models for multiatomic hetero-nuclear and homo-nuclear molecular Bose-Einstein condensates through the algebraic Bethe ansatz method. The conserved quantities of the respective models are also showed.
description: 11 pages
Blending In Situ Polyurethane-Urea with Different Kinds of Rubber: Performance and Compatibility Aspects
Creators: name: Tahir, Muhammad
name: Heinrich, Gert
name: Mahmood, Nasir
name: Boldt, Regine
name: Wießner, Sven
name: Stöckelhuber, Klaus Werner
Publisher: name: Basel : MDPI
Year: 2018
Subjects: subject: Compatibilization
subject: Elastomers
subject: In situ synthesis
subject: Polyurethane-urea
subject: Rubber blends
subject: Structural/mechanical characterization
subject: 600

description: Specific physical and reactive compatibilization strategies are applied to enhance the interfacial adhesion and mechanical properties of heterogeneous polymer blends. Another pertinent challenge is the need of energy-intensive blending methods to blend high-tech polymers such as the blending of a pre-made hard polyurethane (-urea) with rubbers. We developed and investigated a reactive blending method to prepare the outstanding blends based on polyurethane-urea and rubbers at a low blending temperature and without any interfacial compatibilizing agent. In this study, the polyurethane-urea (PUU) was synthesized via the methylene diphenyl diisocyanate end-capped prepolymer and m-phenylene diamine based precursor route during blending at 100 °C with polar (carboxylated nitrile rubber (XNBR) and chloroprene rubber (CR)) and non-polar (natural rubber (NR), styrene butadiene rubber (sSBR), and ethylene propylene butadiene rubber (EPDM)) rubbers. We found that the in situ PUU reinforces the tensile response at low strain region and the dynamic-mechanical response up to 150 °C in the case of all used rubbers. Scanning electron microscopy reveals a stronger rubber/PUU interface, which promotes an effective stress transfer between the blend phases. Furthermore, energy filtered transmission electron microscopy (EFTEM) based elemental carbon map identifies an interphase region along the interface between the nitrile rubber and in situ PUU phases of this exemplary blend type.
GIS technology in environmental protection: Research directions based on literature review
Creators: name: Sierka, Edyta
Publisher: name: figshare
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Gajos, M. and Sierka, E. 2012. GIS technology in environmental protection: Research directions based on literature review. Polish Journal of Environmental Studies vol. 21, No. 2, 241-248.
CuxCo1-xFe2O4 (x = 0.33, 0.67, 1) Spinel Ferrite Nanoparticles Based Thermoplastic Polyurethane Nanocomposites with Reduced Graphene Oxide for Highly Efficient Electromagnetic Interference Shielding
Creators: name: , Anju
name: Yadav, Raghvendra Singh
name: Pötschke, Petra
name: Pionteck, Jürgen
name: Krause, Beate
name: Kuřitka, Ivo
name: Vilčáková, Jarmila
name: Škoda, David
name: Urbánek, Pavel
name: Machovský, Michal
name: Masař, Milan
name: Urbánek, Michal
Publisher: name: Basel : Molecular Diversity Preservation International (MDPI)
Year: 2022
Subjects: subject: Electromagnetic interference shielding
subject: Magnetic nanoparticles
subject: Nanocomposites
subject: Reduced graphene oxide
subject: Spinel ferrite
subject: 570
subject: 540

description: CuxCo1-x Fe2O4 (x = 0.33,0.67,1)-reduced graphene oxide (rGO)-thermoplastic polyurethane (TPU) nanocomposites exhibiting highly efficient electromagnetic interference (EMI) shielding were prepared by a melt-mixing approach using a microcompounder. Spinel ferrite Cu0.33Co0.67Fe2O4 (Cu-CoF1), Cu0.67Co0.33Fe2O4 (CuCoF2) and CuFe2O4 (CuF3) nanoparticles were synthesized using the sonochemical method. The CuCoF1 and CuCoF2 exhibited typical ferromagnetic features, whereas CuF3 displayed superparamagnetic characteristics. The maximum value of EMI total shielding effectiveness (SEt) was noticed to be 42.9 dB, 46.2 dB, and 58.8 dB for CuCoF1-rGO-TPU, CuCoF2-rGO-TPU, and CuF3-rGO-TPU nanocomposites, respectively, at a thickness of 1 mm. The highly efficient EMI shielding performance was attributed to the good impedance matching, conductive, dielectric, and magnetic loss. The demonstrated nanocomposites are promising candidates for a lightweight, flexible, and highly efficient EMI shielding material.
Excited meson spectroscopy with two chirally improved quarks
Creators: name: Engel, Georg P.
name: Lang, C. B.
name: Limmer, Markus
name: Mohler, Daniel
name: Schaefer, Andreas
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The excited isovector meson spectrum is explored using two chirally improved dynamical quarks. Seven ensembles, with pion masses down to \approx 250 MeV are discussed and used for extrapolations to the physical point. Strange mesons are investigated using partially quenched s-quarks. Using the variational method, we extract excited states in several channels and most of the results are in good agreement with experiment.
description: 7 pages, 11 figures, talk given at the XXIX International Symposium on Lattice Field Theory - Lattice 2011, July 10-16 2011, Squaw Valley, Lake Tahoe, California
Identifying Clusters of Concepts in a Low Cohesive Class for Extract Class Refactoring Using Metrics Supplemented Agglomerative Clustering Technique
Creators: name: Rao, A. Ananda
name: Reddy, K. Narendar
Publisher: name: arXiv
Year: 2012
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Object oriented software with low cohesive classes can increase maintenance cost. Low cohesive classes are likely to be introduced into the software during initial design due to deviation from design principles and during evolution due to software deterioration. Low cohesive class performs operations that should be done by two or more classes. The low cohesive classes need to be identified and refactored using extract class refactoring to improve the cohesion. In this regard, two aspects are involved; the first one is to identify the low cohesive classes and the second one is to identify the clusters of concepts in the low cohesive classes for extract class refactoring. In this paper, we propose metrics supplemented agglomerative clustering technique for covering the above two aspects. The proposed metrics are validated using Weyuker's properties. The approach is applied successfully on two examples and on a case study.
description: 10 pages, 8 figures, 4 tables; ISSN (Online): 1694-0814
Commissions Act om Dragon Qvarteret Helgum paa Granevolden i Gran Sogn. Bilag 1
Creators: name: Helgum (Gård : Gran)
name: Hammer, Christopher
name: Moss, Frederik Christian
name: Mejdell, Stephan Barclay
name: Mejdell, Johan Ernst
name: Granevolden, Peder Andersen
name: Bentzon, Hans
name: Spärck, Christian Ludvig
name: Hals, Peder
name: Krog, Andreas Christian
name: Alfsen, Christen
name: Hiort, Christian
name: Schiønning, W.
name: Frisach, Christen
name: Schwings, Johan Christian
Publisher: name: Unknown
Year: 0

description: I kommisjonen: Christopher Hammer (avløst av Frederik Christian Moss) og Stephan Barcklay Mejdell. Assistent: Johan Ernst Mejdell
description: Gjelder overdragelse av bygselseddel og utkastelse fra Helgum. Saken reist av Peder Andersen Granevolden mot rittmester Hans Bentzon, fogd Christian Ludvig Spärck, løytnant Peder Hals og prost Andreas Christian Krog Partenes fullmektiger: Christen Alfsen (for Granevolden), Christian Hiort delegert til W. Schiønning og 15/9 også Christen Frisach (for Bentzon,Spärck og Hals), Johan Christian Schwings (for Krog)
description: Bilag 1: 29 saksdok. ukompl.
Development of Liquid Diene Rubber Based Highly Deformable Interactive Fiber-Elastomer Composites
Creators: name: Kamble, Vikram G.
name: Mersch, Johannes
name: Tahir, Muhammad
name: Stöckelhuber, Klaus Werner
name: Das, Amit
name: Wießner, Sven
Publisher: name: Basel : MDPI
Year: 2022
Subjects: subject: Fiber-rubber composites
subject: Smart composite structures
subject: SMAs
subject: Soft actuators
subject: 600

description: The preparation of intelligent structures for multiple smart applications such as soft-ro-botics, artificial limbs, etc., is a rapidly evolving research topic. In the present work, the preparation of a functional fabric, and its integration into a soft elastomeric matrix to develop an adaptive fiber-elastomer composite structure, is presented. Functional fabric, with the implementation of the shape memory effect, was combined with liquid polybutadiene rubber by means of a low-temperature vulcanization process. A detailed investigation on the crosslinking behavior of liquid polybutadiene rubber was performed to develop a rubber formulation that is capable of crosslinking liquid rubber at 75 °C, a temperature that is much lower than the phase transformation temperature of SMA wires (90–110 °C). By utilizing the unique low-temperature crosslinking protocol for liquid polybutadiene rubber, soft intelligent structures containing functional fabric were developed. The adaptive structures were successfully activated by Joule heating. The deformation behavior of the smart structures was experimentally demonstrated by reaching a 120 mm bending distance at an activation voltage of 8 V without an additional load, whereas 90 mm, 70 mm, 65 mm, 57 mm bending distances were achieved with attached weights of 5 g, 10 g, 20 g, 30 g, respectively.
Kierunki badań zastosowania technologii GIS w ochronie środowiska: analiza polskiego czasopiśmiennictwa naukowego
Creators: name: Sierka, Edyta
Publisher: name: figshare
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Gajos M., Sierka E. (2011). Kierunki badań zastosowania technologii GIS w ochronie środowiska: analiza polskiego czasopiśmiennictwa naukowego. In: Roczniki Geomatyki IX (3), 61-70.
Commissions Act om Dragon Qvarteret Helgum paa Granevolden i Gran Sogn. Bilag 2
Creators: name: Helgum (Gård : Gran)
name: Hammer, Christopher
name: Moss, Frederik Christian
name: Mejdell, Stephan Barclay
name: Mejdell, Johan Ernst
name: Granevolden, Peder Andersen
name: Bentzon, Hans
name: Spärck, Christian Ludvig
name: Hals, Peder
name: Krog, Andreas Christian
name: Alfsen, Christen
name: Hiort, Christian
name: Schiønning, W.
name: Frisach, Christen
name: Schwings, Johan Christian
Publisher: name: Unknown
Year: 0

description: Bilag 2: korrespondanse etter dommen til 21/4 1797, 26 dok.
description: I kommisjonen: Christopher Hammer (avløst av Frederik Christian Moss) og Stephan Barcklay Mejdell. Assistent: Johan Ernst Mejdell
description: Gjelder overdragelse av bygselseddel og utkastelse fra Helgum. Saken reist av Peder Andersen Granevolden mot rittmester Hans Bentzon, fogd Christian Ludvig Spärck, løytnant Peder Hals og prost Andreas Christian Krog Partenes fullmektiger: Christen Alfsen (for Granevolden), Christian Hiort delegert til W. Schiønning og 15/9 også Christen Frisach (for Bentzon,Spärck og Hals), Johan Christian Schwings (for Krog)
Product decompositions in finite simple groups
Creators: name: Liebeck, Martin
name: Nikolov, Nikolay
name: Shalev, Aner
Publisher: name: arXiv
Year: 2011
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20D40, 20D06

description: We propose a general conjecture on decompositions of finite simple groups as products of conjugates of an arbitrary subset. We prove this conjecture for bounded subsets of arbitrary finite simple groups, and for large subsets of groups of Lie type of bounded rank. Some of our arguments apply recent advances in the theory of growth in finite simple groups of Lie type, and provide a variety of new product decompositions of these groups.
Commissions Act om Dragon Qvarteret Helgum paa Granevolden i Gran Sogn
Creators: name: Helgum (Gård : Gran)
name: Schwings, Johan Christian
name: Frisach, Christen
name: Schiønning, W.
name: Hiort, Christian
name: Alfsen, Christen
name: Krog, Andreas Christian
name: Hals, Peder
name: Spärck, Christian Ludvig
name: Bentzon, Hans
name: Granevolden, Peder Andersen
name: Mejdell, Johan Ernst
name: Hammer, Christopher
Publisher: name: Unknown
Year: 0

description: I kommisjonen: Christopher Hammer (avløst av Frederik Christian Moss) og Stephan Barcklay Mejdell. Assistent: Johan Ernst Mejdell
description: Gjelder overdragelse av bygselseddel og utkastelse fra Helgum. Saken reist av Peder Andersen Granevolden mot rittmester Hans Bentzon, fogd Christian Ludvig Spärck, løytnant Peder Hals og prost Andreas Christian Krog Partenes fullmektiger: Christen Alfsen (for Granevolden), Christian Hiort delegert til W. Schiønning og 15/9 også Christen Frisach (for Bentzon,Spärck og Hals), Johan Christian Schwings (for Krog)
description: Bilag 1: 29 saksdok. ukompl.. Bilag 2: korrespondanse etter dommen til 21/4 1797, 26 dok.
title: A simple and effective method for the accurate extraction of kinetic parameters using differential Tafel plots
Creators: name: Khadke, Prashant
name: Tichter, Tim
name: Boettcher, Tim
name: Muench, Falk
name: Ensinger, Wolfgang
name: Roth, Christina
Publisher: name: Springer Nature
Year: 2024

description: Abstract 

The practice of estimating the transfer coefficient (α) and the exchange current (i₀) by arbitrarily placing a straight line on Tafel plots has led to high variance in these parameters between different research groups. Generating Tafel plots by finding kinetic current, ik from the conventional mass transfer correction method does not guarantee an accurate estimation of the α and i₀. This is because a substantial difference in values of α and i₀ can arise from only minor deviations in the calculated values of ik. These minor deviations are often not easy to recognise in polarisation curves and Tafel plots. Recalling the IUPAC definition of α , the Tafel plots can be alternatively represented as differential Tafel plots (DTPs) by taking the first order differential of Tafel plots with respect to overpotential. Without further complex processing of the existing raw data, many crucial observations can be made from DTP which is otherwise very difficult to observe from Tafel plots. These for example include a) many perfectly looking experimental linear Tafel plots (R² > 0.999) can give rise to incorrect kinetic parameters b) substantial differences in values of α and i₀ can arise when the limiting current (iL) is just off by 5% while performing the mass transfer correction c) irrespective of the magnitude of the double layer charging current (ic), the Tafel plots can still get significantly skewed when the ratio of i₀/ic is small. Hence, in order to determine accurate values of α and i₀, we show how the DTP approach can be applied to experimental polarisation curves having well defined iL, poorly defined iL at all.
Heavy quarkonium production and polarization
Creators: name: Kang, Zhong-Bo
name: Qiu, Jian-Wei
name: Sterman, George
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a perturbative QCD factorization formalism for the production of heavy quarkonia of large transverse momentum $p_T$ at collider energies, which includes both the leading power (LP) and next-to-leading power (NLP) contributions to the cross section in the $m_Q^2/p_T^2$ expansion for heavy quark mass $m_Q$. We estimate fragmentation functions in the non-relativistic QCD formalism, and reproduce the bulk of the large enhancement found in explicit NLO calculations in the color singlet model. Heavy quarkonia produced from NLP channels prefer longitudinal polarization.
description: latex, 11 pages, 4 figures
Ferric Ions Crosslinked Epoxidized Natural Rubber Filled with Carbon Nanotubes and Conductive Carbon Black Hybrid Fillers
Creators: name: Damampai, Kriengsak
name: Pichaiyut, Skulrat
name: Stöckelhuber, Klaus Werner
name: Das, Amit
name: Nakason, Charoen
Publisher: name: Basel : MDPI
Year: 2022
Subjects: subject: epoxidized natural rubber
subject: ferric chloride
subject: carbon nanotubes
subject: nanocomposite
subject: conductive carbon black
subject: 540

description: Natural rubber with 50 mol % epoxidation (ENR-50) was filled with carbon nanotubes (CNTs) and conductive carbon black (CCB) hybrid fillers with various CCB loadings of 2.5, 5.0, 7.0, 10.0 and 15.0 phr, and the compounds were mixed with ferric ion (Fe3+) as a crosslinking agent. The ENRs filled exclusively with CNTs, and CNT–CCB hybrid fillers exhibited typical curing curves at different CCB loadings, i.e., increasing torque with time and thus crosslinked networks. Furthermore, the incorporation of CNT–CCB hybrid fillers and increasing CCB loadings caused an enhancement of tensile properties (modulus and tensile strength) and crosslink densities, which are indicated by the increasing torque difference and the crosslink densities. The crosslink densities are determined by swelling and temperature scanning stress relaxation (TSSR). Increasing CCB loadings also caused a significant improvement in bound rubber content, filler–rubber interactions, thermal resistance, glass transition temperature (Tg) and electrical conductivity. A combination of 7 phr CNT and CCB with loading higher than 2.5 phr gave superior properties to ENR vulcanizates. Furthermore, the secondary CCB filler contributes to the improvement of CNT dispersion in the ENR matrix by networking the CNT capsules and forming CNT–CCB–CNT pathways and thus strong CNT–CCB networks, indicating the improvement in the tensile properties, bound rubber content and dynamic properties of the ENR composites. Moreover, higher electrical conductivity with a comparatively low percolation threshold of the hybrid composites was found as compared to the ENR filled with CNTs without CCB composite. The superior mechanical and other properties are due to the finer dispersion and even distribution of CNT–CCB hybrid fillers in the ENR matrix.
Vorbericht über Stabilitätseigenschaften von Schiffen in Fahrt
Creators: name: Streit, Egmont
Publisher: name: TUHH Universitätsbibliothek
Year: 1958
Subjects: classificationCode: 52.00
subject: Maschinenbau, Energietechnik, Fertigungstechnik: Allgemeines

description: Vorbericht über Stabilitätseigenschaften von Schiffen in Fahrt
Two Populations of Molecular Clouds in the Antennae Galaxies
Creators: name: Wei, Lisa H.
name: Keto, Eric
name: Ho, Luis C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Super star clusters --- extremely massive clusters found predominately in starburst environments --- are essential building blocks in the formation of galaxies and thought to dominate star formation in the high-redshift universe. However, the transformation from molecular gas into these ultra-compact star clusters is not well understood. To study this process, we used the Submillimeter Array and the Plateau de Bure Interferometer to obtain high angular resolution (~1.5" or 160 pc) images of the Antennae overlap region in CO(2--1) to search for the molecular progenitors of the super star clusters. We resolve the molecular gas distribution into a large number of clouds, extending the differential cloud mass function down to a 5σcompleteness limit of 3.8x10^5 M_sun. We identify a distinct break in the mass function around log M_mol/M_sun ~ 6.5, which separates the molecular clouds into two distinct populations. The smaller, less massive clouds reside in more quiescent areas in the region, while the larger, more massive clouds cluster around regions of intense star formation. A broken power-law fit to the mass function yields slopes of α= -1.39+/-0.10 and α= -1.44+/-0.14 for the low- and high-mass cloud population, well-matched to the mass function found for super star clusters in the Antennae galaxies. We find large velocity gradients and velocity dispersions at the locations of intense star formation, suggestive of compressive shocks. It is likely that these environmental factors contribute to the formation of the observed massive molecular clouds and super star clusters in the Antennae galaxies.
description: 20 pages, 13 figures, accepted by ApJ
Dislocation-mediated growth of bacterial cell walls
Creators: name: Amir, Ariel
name: Nelson, David R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Recent experiments have illuminated a remarkable growth mechanism of rod-shaped bacteria: proteins associated with cell wall extension move at constant velocity in circles oriented approximately along the cell circumference (Garner et al., Science (2011), Dominguez-Escobar et al. Science (2011), van Teeffelen et al. PNAS (2011). We view these as dislocations in the partially ordered peptidoglycan structure, activated by glycan strand extension machinery, and study theoretically the dynamics of these interacting defects on the surface of a cylinder. Generation and motion of these interacting defects lead to surprising effects arising from the cylindrical geometry, with important implications for growth. We also discuss how long range elastic interactions and turgor pressure affect the dynamics of the fraction of actively moving dislocations in the bacterial cell wall.
description: to appear in PNAS
Problem gatunków inwazyjnych i ekspansywnych w leśnych rezerwatach przyrody Wyżyny Śląsko-Krakowskiej
Creators: name: Sierka, Edyta
Publisher: name: figshare
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Chmura D., Sierka E. (2007). Problem gatunków inwazyjnych i ekspansywnych w leśnych rezerwatach przyrody Wyżyny Śląsko-Krakowskiej. Środowisko i Rozwój 15 (1), 98-105.
Screening of Different Carbon Nanotubes in Melt-Mixed Polymer Composites with Different Polymer Matrices for Their Thermoelectrical Properties
Creators: name: Krause, Beate
name: Barbier, Carine
name: Levente, Juhasz
name: Klaus, Maxim
name: Pötschke, Petra
Publisher: name: Basel : MDPI
Year: 2019
Subjects: subject: Carbon nanotubes
subject: Nitrogen-doping
subject: Polymer composites
subject: Thermoelectric
subject: 620
subject: 670

description: The aim of this study is to reveal the influences of carbon nanotube (CNT) and polymer type as well as CNT content on electrical conductivity, Seebeck coefficient (S), and the resulting power factor (PF) and figure of merit (ZT). Different commercially available and laboratory made CNTs were used to prepare melt-mixed composites on a small scale. CNTs typically lead to p-type composites with positive S-values. This was found for the two types of multi-walled CNTs (MWCNT) whereby higher Seebeck coefficient in the corresponding buckypapers resulted in higher values also in the composites. Nitrogen doped MWCNTs resulted in negative S-values in the buckypapers as well as in the polymer composites. When using single-walled CNTs (SWCNTs) with a positive S-value in the buckypapers, positive (polypropylene (PP), polycarbonate (PC), poly (vinylidene fluoride) (PVDF), and poly(butylene terephthalate) (PBT)) or negative (polyamide 66 (PA66), polyamide 6 (PA6), partially aromatic polyamide (PARA), acrylonitrile butadiene styrene (ABS)) S-values were obtained depending on the matrix polymer and SWCNT type. The study shows that the direct production of n-type melt-mixed polymer composites from p-type commercial SWCNTs with relatively high Seebeck coefficients is possible. The highest Seebeck coefficients obtained in this study were 66.4 µV/K (PBT/7 wt % SWCNT Tuball) and −57.1 µV/K (ABS/0.5 wt % SWCNT Tuball) for p-and n-type composites, respectively. The highest power factor and ZT of 0.28 µW/m·K2 and 3.1 × 10−4, respectively, were achieved in PBT with 4 wt % SWCNT Tuball.
Melboestadske Bog- og Natural-Samling ved Christopher Hammer
Creators: name: Hammer, Christopher
Publisher: name: Unknown
Year: 0

description: Samling af Böger, Mathematiske Instrumenter, Manuscripter og meere ved Christopher Hammer Kongl: Maÿsts Virkelig Justits Raad og General Conducteur over Aggershuus Stift. Melboestad i Gran Sogn 1792
description: Renskrift av Fol. 35a
Does the Type of Polymer and Carbon Nanotube Structure Control the Electromagnetic Shielding in Melt-Mixed Polymer Nanocomposites?
Creators: name: Biswas, Sourav
name: Muzata, Tanyaradzwa S.
name: Krause, Beate
name: Rzeczkowski, Piotr
name: Pötschke, Petra
name: Bose, Suryasarathi
Publisher: name: Basel : MDPI
Year: 2020
Subjects: subject: Carbon nanotube
subject: Microwave shielding
subject: Polymer nanocomposites
subject: Polypropylene (PP)
subject: Polyvinylidene fluoride (PVDF)
subject: 620
subject: 670

description: A suitable polymer matrix and well dispersed conducting fillers forming an electrically conducting network are the prime requisites for modern age electromagnetic shield designing. An effective polymer-based shield material is designed that can attenuate 99.9% of incident electromagnetic (EM) radiation at a minimum thickness of <0.5 mm. This is accomplished by the choice of a suitable partially crystalline polymer matrix while comparing non-polar polypropylene (PP) with polar polyvinylidene fluoride (PVDF) and a best suited filler nanomaterial by comparing different types of carbon nanotubes such as; branched, single-walled and multi-walled carbon nanotubes, which were added in only 2 wt %. Different types of interactions (polar-polar and CH-π and donor-acceptor) make b-MWCNT more dispersible in the PVDF matrix, which together with high crystallinity resulted in the best electrical conductivity and electromagnetic shielding ability of this composite. This investigation additionally conceals the issues related to the thickness of the shield material just by stacking individual thin nanocomposite layers containing different carbon nanotube (CNT) types with 0.3 mm thickness in a simple manner and finally achieves 99.999% shielding efficiency at just 0.9 mm thickness when using a suitable order of the different PVDF based nanocomposites.
The potential for bias in principal causal effect estimation when treatment received depends on a key covariate
Creators: name: Zigler, Corwin M.
name: Belin, Thomas R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Motivated by a potential-outcomes perspective, the idea of principal stratification has been widely recognized for its relevance in settings susceptible to posttreatment selection bias such as randomized clinical trials where treatment received can differ from treatment assigned. In one such setting, we address subtleties involved in inference for causal effects when using a key covariate to predict membership in latent principal strata. We show that when treatment received can differ from treatment assigned in both study arms, incorporating a stratum-predictive covariate can make estimates of the "complier average causal effect" (CACE) derive from observations in the two treatment arms with different covariate distributions. Adopting a Bayesian perspective and using Markov chain Monte Carlo for computation, we develop posterior checks that characterize the extent to which incorporating the pretreatment covariate endangers estimation of the CACE. We apply the method to analyze a clinical trial comparing two treatments for jaw fractures in which the study protocol allowed surgeons to overrule both possible randomized treatment assignments based on their clinical judgment and the data contained a key covariate (injury severity) predictive of treatment received.
description: Published in at http://dx.doi.org/10.1214/11-AOAS477 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Numerical Weather Prediction (NWP) and hybrid ARMA/ANN model to predict global radiation
Creators: name: Voyant, Cyril
name: Muselli, Marc
name: Paoli, Christophe
name: Nivet, Marie Laure
Publisher: name: arXiv
Year: 2012
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We propose in this paper an original technique to predict global radiation using a hybrid ARMA/ANN model and data issued from a numerical weather prediction model (ALADIN). We particularly look at the Multi-Layer Perceptron. After optimizing our architecture with ALADIN and endogenous data previously made stationary and using an innovative pre-input layer selection method, we combined it to an ARMA model from a rule based on the analysis of hourly data series. This model has been used to forecast the hourly global radiation for five places in Mediterranean area. Our technique outperforms classical models for all the places. The nRMSE for our hybrid model ANN/ARMA is 14.9% compared to 26.2% for the naïve persistence predictor. Note that in the stand alone ANN case the nRMSE is 18.4%. Finally, in order to discuss the reliability of the forecaster outputs, a complementary study concerning the confidence interval of each prediction is proposed
description: Energy (2012) 1
Thermoelectric Performance of Polypropylene/Carbon Nanotube/Ionic Liquid Composites and Its Dependence on Electron Beam Irradiation
Creators: name: Voigt, Oliver
name: Krause, Beate
name: Pötschke, Petra
name: Müller, Michael T.
name: Wießner, Sven
Publisher: name: Basel : MDPI
Year: 2022
Subjects: subject: Carbon nanotube
subject: Electron beam irradiation
subject: Ionic liquid
subject: Polypropylene
subject: Thermoelectric
subject: 620
subject: 670

description: The thermoelectric behavior of polypropylene (PP) based nanocomposites containing single walled carbon nanotubes (SWCNTs) and five kinds of ionic liquids (Ils) dependent on composite composition and electron beam irradiation (EB) was studied. Therefore, several samples were melt-mixed in a micro compounder, while five Ils with sufficiently different anions and/or cations were incorporated into the PP/SWCNT composites followed by an EB treatment for selected composites. Extensive investigations were carried out considering the electrical, thermal, mechanical, rheological, morphological and, most significantly, thermoelectric properties. It was found that it is possible to prepare n-type melt-mixed polymer composites from p-type commercial SWCNTs with relatively high Seebeck coefficients when adding four of the selected Ils. The highest Seebeck coefficients achieved in this study were +49.3 µV/K (PP/2 wt.% SWCNT) for p-type composites and −27.6 µV/K (PP/2 wt.% SWCNT/4 wt.% IL type AMIM Cl) for n-type composites. Generally, the type of IL is decisive whether p-or n-type thermoelectric behavior is achieved. After IL addition higher volume conductivity could be reached. Electron beam treatment of PP/SWCNT leads to increased values of the Seebeck coefficient, whereas the EB treated sample with IL (AMIM Cl) shows a less negative Seebeck coefficient value.
Iniziative cooperative per l’open access: scoap3 - Sponsoring Consortium for Open Access Publishing in Particle Physics
Creators: name: Bianco, Stefano
Publisher: name: INFN Open Access Repository
Year: 2015

description: Una descrizione dei progetti INFN nel campo dell'Open Access (modelli economici alternativi agli abbonamenti come Scoap3) e le connessioni con la Science and Technology DIgital Library del CNR. L'ultimo nato e' OAR (openaccessrepository.it) del quale e' disponibile un pilota realizzato con l'intento di essere interoperabile federato alla S&TDL.
Bio-inspired deposition of electrochemically exfoliated graphene layers for electrical resistance heating applications
Creators: name: Utech, Toni
name: Pötschke, Petra
name: Simon, Frank
name: Janke, Andreas
name: Kettner, Hannes
name: Paiva, Maria
name: Zimmerer, Cordelia
Publisher: name: Bristol : IOP Publishing
Year: 2020
Subjects: subject: dopamine
subject: electrical conductivity
subject: electrochemically exfoliated graphene
subject: Joule-Heating
subject: poly(dopamine)
subject: surface resistance
subject: transparency
subject: 530
subject: 540
subject: 600

description: Electrochemically exfoliated graphene (eeG) layers possess a variety of potential applications, e.g. as susceptor material for contactless induction heating in dynamic electro-magnetic fields, and as flexible and transparent electrode or resistivity heating elements. Spray coating of eeG dispersions was investigated in detail as a simple and fast method to deposit both, thin conducting layers and ring structures on polycarbonate substrates. The spray coating process was examined by systematic variation of dispersion concentration and volume applied to heated substrates. Properties of the obtained layers were characterized by UV-VIS spectroscopy, SEM and Confocal Scanning Microscopy. Electrical conductivity of eeG ring structures was measured using micro-four-point measurements. Modification of eeG with poly(dopamine) and post-thermal treatment yields in the reduction of the oxidized graphene proportion, an increase in electrical conductivity, and mechanical stabilization of the deposited thin layers. The chemical composition of modified eeG layer was analyzed via x-ray photoelectron spectroscopy pointing to the reductive behavior of poly(dopamine). Application oriented experiments demonstrate the direct electric current heating (Joule-Heating) effect of spray-coated eeG layers.
Spatial solitons under competing linear and nonlinear diffractions
Creators: name: Shen, Y.
name: Kevrekidis, P. G.
name: Whitaker, N.
name: Malomed, Boris A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We introduce a general model which augments the one-dimensional nonlinear Schrödinger (NLS) equation by nonlinear-diffraction terms competing with the linear diffraction. The new terms contain two irreducible parameters and admit a Hamiltonian representation in a form natural for optical media. The equation serves as a model for spatial solitons near the supercollimation point in nonlinear photonic crystals. In the framework of this model, a detailed analysis of the fundamental solitary waves is reported, including the variational approximation (VA), exact analytical results, and systematic numerical computations. The Vakhitov-Kolokolov (VK) criterion is used to precisely predict the stability border for the solitons, which is found in an exact analytical form, along with the largest total power (norm) that the waves may possess. Past a critical point, collapse effects are observed, caused by suitable perturbations. Interactions between two identical parallel solitary beams are explored by dint of direct numerical simulations. It is found that in-phase solitons merge into robust or collapsing pulsons, depending on the strength of the nonlinear diffraction.
Effect of Graphite Nanoplate Morphology on the Dispersion and Physical Properties of Polycarbonate Based Composites
Creators: name: Müller, Michael Thomas
name: Hilarius, Konrad
name: Liebscher, Marco
name: Lellinger, Dirk
name: Alig, Ingo
name: Pötschke, Petra
Publisher: name: Basel : MDPI
Year: 2017
Subjects: subject: Dispersion
subject: Electrical
subject: Graphite nanoplates
subject: Melt compounding
subject: Polymer-matrix composites (PMCs)
subject: Thermal and mechanical properties
subject: 600

description: The influence of the morphology of industrial graphite nanoplate (GNP) materials on their dispersion in polycarbonate (PC) is studied. Three GNP morphology types were identified, namely lamellar, fragmented or compact structure. The dispersion evolution of all GNP types in PC is similar with varying melt temperature, screw speed, or mixing time during melt mixing. Increased shear stress reduces the size of GNP primary structures, whereby the GNP aspect ratio decreases. A significant GNP exfoliation to individual or few graphene layers could not be achieved under the selected melt mixing conditions. The resulting GNP macrodispersion depends on the individual GNP morphology, particle sizes and bulk density and is clearly reflected in the composite's electrical, thermal, mechanical, and gas barrier properties. Based on a comparison with carbon nanotubes (CNT) and carbon black (CB), CNT are recommended in regard to electrical conductivity, whereas, for thermal conductive or gas barrier application, GNP is preferred.
Adaptive schemes for incomplete quantum process tomography
Creators: name: Teo, Yong Siah
name: Englert, Berthold-Georg
name: Rehacek, Jaroslav
name: Hradil, Zdenek
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose an iterative algorithm for incomplete quantum process tomography, with the help of quantum state estimation, based on the combined principles of maximum-likelihood and maximum-entropy. The algorithm yields a unique estimator for an unknown quantum process when one has less than a complete set of linearly independent measurement data to specify the quantum process uniquely. We apply this iterative algorithm adaptively in various situations and so optimize the amount of resources required to estimate the quantum process with incomplete data.
description: 9 pages, 7 figures
Polylactic Acid/Carbon Nanoparticle Composite Filaments for Sensing
Creators: name: Silva, Mariana M.
name: Lopes, Paulo E.
name: Li, Yilong
name: Pötschke, Petra
name: Ferreira, Fernando N.
name: Paiva, Maria C.
Publisher: name: Basel : MDPI
Year: 2021
Subjects: subject: Multiwall carbon nanotubes
subject: Poly(propylene) glycol
subject: Polylactic acid
subject: Vapor sensing
subject: 600

description: Polylactic acid (PLA) is a bio-based, biodegradable polymer that presents high potential for biomedical and sensing applications. Ongoing works reported in the literature concern mainly applications based on 3D printing, while textile applications are hindered by the limited flexibility of PLA and its composite filaments. In the present work, PLA/multiwall carbon nanotube (MWCNT) composite filaments were produced with enhanced flexibility and electrical conductivity, which may be applied on a textile structure. A biodegradable plasticizer was incorporated in the nanocomposites, aiming at improving MWCNT dispersion and increasing the flexibility of the filaments. Filaments were produced with a range of compositions and their morphology was characterized as well as their thermal, thermomechanical, and electrical properties. Selected compositions were tested for sensing activity using saturated acetone vapor, demonstrating a suitable response and potential for the application in fabrics with sensing capacity.
Parametric representation of wave propagation in nonuniform media (both in transmission and stop bands)
Creators: name: Popov, A.
name: Kovalchuk, V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: An analytical approach based on the parametric representation of the wave propagation in nonuniform media was considered. In addition to the previously developed theory of parametric antiresonance describing the field attenuation in stop bands, in the present paper the behaviour of the Bloch wave in a transmission band was investigated. A wide class of exact solutions was found and the correspondence to the quasi-periodic Floquet solutions was shown.
description: 18 pages
The Localization Behavior of Different CNTs in PC/SAN Blends Containing a Reactive Component
Creators: name: Gültner, Marén
name: Boldt, Regine
name: Formanek, Petr
name: Fischer, Dieter
name: Simon, Frank
name: Pötschke, Petra
Publisher: name: Basel : MDPI
Year: 2021
Subjects: subject: Carbon nanotube localization
subject: Carbon nanotubes
subject: Melt mixing
subject: Morphology
subject: Nanocomposites
subject: Poly(styrene-co-acrylonitrile)
subject: Polycarbonate
subject: Polymer blends
subject: Reactive additive
subject: 540

description: Co-continuous blend systems of polycarbonate (PC), poly(styrene-co-acrylonitrile) (SAN), commercial non-functionalized multi-walled carbon nanotubes (MWCNTs) or various types of commercial and laboratory functionalized single-walled carbon nanotubes (SWCNTs), and a reactive component (RC, N-phenylmaleimide styrene maleic anhydride copolymer) were melt compounded in one step in a microcompounder. The blend system is immiscible, while the RC is miscible with SAN and contains maleic anhydride groups that have the potential to reactively couple with functional groups on the surface of the nanotubes. The influence of the RC on the localization of MWCNTs and SWCNTs (0.5 wt.%) was investigated by transmission electron microscopy (TEM) and energy-filtered TEM. In PC/SAN blends without RC, MWCNTs are localized in the PC component. In contrast, in PC/SAN-RC, the MWCNTs localize in the SAN-RC component, depending on the RC concentration. By adjusting the MWCNT/RC ratio, the localization of the MWCNTs can be tuned. The SWCNTs behave differently compared to the MWCNTs in PC/SAN-RC blends and their localization occurs either only in the PC or in both blend components, depending on the type of the SWCNTs. CNT defect concentration and surface functionalities seem to be responsible for the localization differences.
EVALUATION OF THE SUITABILITY OF ANTHROPOGENIC RESERVOIRS IN URBAN SPACE FOR ECOLOGICAL RESTORATION USING SUBMERGED PLANTS (UPPER SILESIA, POLAND)
Creators: name: Sierka, Edyta
Publisher: name: figshare
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Pierzchała Ł., Sierka E., Trząski L., Bodnaruk J., Czuber B. (2014). EVALUATION OF THE SUITABILITY OF ANTHROPOGENIC RESERVOIRS IN URBAN SPACE FOR ECOLOGICALRESTORATION USING SUBMERGED PLANTS (UPPER SILESIA, POLAND). APPLIED ECOLOGY ANDENVIRONMENTAL RESEARCH 14(1): 277-296.
Focusing of Intense Subpicosecond Laser Pulses in Wedge Targets
Creators: name: Levy, M. C.
name: Kemp, A. J.
name: Wilks, S. C.
name: Divol, L.
name: Baring, M. G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Two dimensional particle-in-cell simulations characterizing the interaction of ultraintense short pulse lasers in the range 10^{18} \leq I \leq 10^{20} W/cm^{2} with converging target geometries are presented. Seeking to examine intensity amplification in high-power laser systems, where focal spots are typically non-diffraction limited, we describe key dynamical features as the injected laser intensity and convergence angle of the target are systematically varied. We find that laser pulses are focused down to a wavelength with the peak intensity amplified by an order of magnitude beyond its vacuum value, and develop a simple model for how the peak location moves back towards the injection plane over time. This performance is sustained over hundreds of femtoseconds and scales to laser intensities beyond 10^{20} W/cm^{2} at 1 μm wavelength.
description: 5 pages, 6 figures, accepted for publication in Physics of Plasmas
Blend Structure and n-Type Thermoelectric Performance of PA6/SAN and PA6/PMMA Blends Filled with Singlewalled Carbon Nanotubes
Creators: name: Krause, Beate
name: Liguoro, Alice
name: Pötschke, Petra
Publisher: name: Basel : MDPI
Year: 2021
Subjects: subject: Blends
subject: Carbon nanotubes
subject: Melt-mixing
subject: Morphology
subject: N-type behavior
subject: Polymer composites
subject: Rheology
subject: Segregated structures
subject: Thermoelectrics
subject: 570
subject: 540

description: The present study investigates how the formation of melt-mixed immiscible blends based on PA6/SAN and PA6/PMMA filled with single walled nanotubes (SWCNTs) affects the thermoelectric (TE) properties. In addition to the detailed investigation of the blend morphology with compositions between 100/0 wt.% and 50/50 wt.%, the thermoelectric properties are investigated on blends with different SWCNT concentrations (0.25–3.0 wt.%). Both PA6 and the blend composites with the used type of SWCNTs showed negative Seebeck coefficients. It was shown that the PA6 matrix polymer, in which the SWCNTs are localized, mainly influenced the thermoelectric properties of blends with high SWCNT contents. By varying the blend composition, an increase in the absolute Seebeck coefficient, power factor (PF), and figure of merit (ZT) was achieved compared to the PA6 composite which is mainly related to the selective localization and enrichment of SWCNTs in the PA6 matrix at constant SWCNT loading. The maximum PFs achieved were 0.22 µW/m·K2 for PA6/SAN/SWCNT 70/30/3 wt.% and 0.13 µW/m·K2 for PA6/PMMA/SWCNT 60/40/3 wt.% compared to 0.09 µW/m·K2 for PA6/3 wt.% SWCNT which represent increases to 244% and 144%, respectively. At higher PMMA or SAN concentration, the change from matrix-droplet to a co-continuous morphology started, which, despite higher SWCNT enrichment in the PA6 matrix, disturbed the electrical conductivity, resulting in reduced PFs with still increasing Seebeck coefficients. At SWCNT contents between 0.5 and 3 wt.% the increase in the absolute Seebeck coefficient was compensated by lower electrical conductivity resulting in lower PF and ZT as compared to the PA6 composites.