cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dynamics of ultrathin V-oxide layers on Rh(111) in catalytic oxidation of ammonia and CO
Creators: name: Boehn, B. Von
name: Preiss, A.
name: Imbihl, R.
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2016
Subjects: subject: photoemission electron microscopy (PEEM)
subject: Rh(111)
subject: physical chemistry
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Catalytic oxidation of ammonia and CO has been studied in the 10(-4) mbar range using a catalyst prepared by depositing ultra-thin vanadium oxide layers on Rh(111) (thetaV approximately 0.2 MLE). Using photoemission electron microscopy (PEEM) as a spatially resolving method, we observe that upon heating in an atmosphere of NH3 and O2 the spatial homogeneity of the VOx layer is removed at 800 K and a pattern consisting of macroscopic stripes develops; at elevated temperatures this pattern transforms into a pattern of circular VOx islands. Under reaction conditions the neighboring VOx islands become attracted by each other and coalesce. Similar processes of pattern formation and island coalescence are observed in catalytic CO oxidation. Reoxidation of the reduced VOx catalyst proceeds via surface diffusion of oxygen adsorbed onto Rh(111). A pattern consisting of macroscopic circular VOx islands can also be obtained by heating a Rh(111)/VOx catalyst in pure O2.
Morishitium Witenberg 1928
Creators: name: Dronen, Norman O.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Platyhelminthes
Trematoda
Plagiorchiida
Cyclocoelidae
Morishitium

description: Genus Morishitium Witenberg, 1928
 Species of Morishitium can be dived into three body types: the rauschi type (Table 1) where both an oral sucker and ventral sucker are absent (Morishitium rauschi and M. texanense); the straightum type (Table 2) where there is only an oral sucker present (M. bivesiculatum, M. dollfusi, M. dumetellae, M. petrowi, M. straightum and the new species described herein) and the vagum type (Table 3) where both an oral sucker and an acetabulum are present (M. sinhaldripa, M. taiwanense, and M. vagum).
description: Published as part of Dronen, Norman O., 2014, Key to the species of Morishitium Wienberg, 1928 (Cyclocoelidae), with the description of a new species from the red-billed blue magpie, Urocissa erythrorhyncha (Boddaert) (Corvidae) from Guizhou Province, People's Republic of China, pp. 273-282 in Zootaxa 3835 (2) on page 275, DOI: 10.11646/zootaxa.3835.2.7, http://zenodo.org/record/230480
Verzeichnis der Mitarbeiter des vorliegenden Bandes
Creators: name: Redaktion, Die
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: -
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 45 (1976): Nachrichten aus Niedersachsens Urgeschichte
Double Exchange model for nanoscopic clusters
Creators: name: Rotter, D.
name: Valli, A.
name: Sangiovanni, G.
name: Held, K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We solve the double exchange model on nanoscopic clusters exactly, and specifically consider a six-site benzene-like nanocluster. This simple model is an ideal testbed for studying magnetism in nanoclusters and for validating approximations such as the dynamical mean field theory (DMFT). Non-local correlations arise between neighboring localized spins due to the Hund's rule coupling, favoring a short-range magnetic order of ferro- or antiferromagnetic type. For a geometry with more neighboring sites or a sufficiently strong hybridization between leads and the nanocluster, these non-local correlations are less relevant, and DMFT can be applied reliably.
description: 9 pages, 9 figures, 1 table
title: Resolution: Heimat Thüringen - Handeln tut not
Creators: name: :None
Publisher: name: Zentrum für Thüringer Landeskultur
Year: 1993
Subjects: subject: 390
subject: 710

description: Heimat Thüringen - kulturelle Identität im Wandel: Tagung der Thüringischen Vereinigung für Volkskunde & des Zentrums für Thüringer Landeskultur, 26.-28. März 1993 ; Dokumentation der Tagungsbeiträge, p. 52
Additional file 1 of Combining losartan with radiotherapy increases tumor control and inhibits lung metastases from a HER2/neu-positive orthotopic breast cancer model
Creators: name: Li, Wende
name: Li, Sen
name: Chen, Ivy X.
name: Liu, Yujiao
name: Ramjiawan, Rakesh R.
name: Leung, Chi-Ho
name: Gerweck, Leo E.
name: Fukumura, Dai
name: Loeffler, Jay S.
name: Jain, Rakesh K.
name: Duda, Dan G.
name: Huang, Peigen
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Computational Biology

description: Additional file 1. Figure 1. Schematic representation of the protocol for MCa-M3C cell line establishment. Tumor tissue was obtained from a spontaneous mammary adenocarcinoma tissues arising in a female MMTV-PyVT/FVB transgenic mouse. Then this tumor tissue was implanted into the mammary fat pad (MFP) of syngeneic FVB/N mice. The MFP tumor was resected when the tumor reached a size of ~ 500 mm3. All the mice developed breast cancer lung metastases. This was followed by 3 serial in vivo selections of tumor metastases to the lungs from this tumor-MFP-implantation. Finally, a fresh metastatic lesion from the lung was obtained and cultured in vitro as a long-term passage monolayer cell line. Figure 2. Repeat experiments of MCa-M3C orthotopic tumor response to combined losartan with single dose radiotherapy. (A) MCa-M3C orthotopic tumors growth and response curves of control, losartan alone, 20 Gy local irradiation alone (S-IR), and combined losartan and irradiation therapy (Los+S-IR); Los indicates the start losartan treatment; and RT indicates single dose irradiation. (B) Mean tumor growth time (Days) for tumor to reach a mean volume of 500 mm3. Results of repeated experiments once again showed that S-IR or Los+S-IR treatment significantly delayed tumor growth compared to control, or losartan alone (S-IR vs Control/Losartan; and Los+S-IR vs Control/Losartan, all P<0.0001). In addition, the combination of Losartan+S-IR significantly enhanced tumor response compared to radiation alone (S-IR) by increasing TGD with 8 additional days (Los+S-IR vs S-IR, P<0.0001). However, losartan alone also did not show any effect on MCa-M3C tumors (Losartan vs Control, P>0.05). Data are presented as Mean ± SEM; P<0.05 is considered statistically significant (N=17-18/group). Figure 3. Tumor vessel imaging of MCa-M3C isografts in the MFP windows by MPLSM. (A) Tumor in a mouse treated with sterile water as control at day 0 and (B) day 3; and (C) tumor in a mouse treated with losartan at day 0, and (D) day 3. Bar=250 μm. (E) Gross pictures of lung metastases in control, Losartan, IR, and IR+Losartan treatment groups. Figure 4. H&E staining sections of losartan treated and control MCa-M3C MFP tumor tissues. (A) Tumor in a mouse treated with sterile water as control at day 3; and (B) tumor in a mouse treated with losartan at day 3 with morphologically observed tumor stroma vessels (*). Bar=100 μm.
Rekonstruktionsuntersuchungen an zwei neolithischen trepanierten Schädeln aus Börnecke, Kr. Wernigerode
Creators: name: Nemeskéri, János
name: Busch, Ralf
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: -
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 45 (1976): Nachrichten aus Niedersachsens Urgeschichte
The Farsighted Stability of Global Trade Policy Arrangements
Creators: name: Berens, Stefan
name: Chochua, Lasha
Publisher: name: Bielefeld University, Department of Business Administration and Economics
Year: 2017
Subjects: subject: 330
subject: Trade Policy Arrangements
subject: Stability
subject: Unlimited Farsightedness

description: In this paper, we study and compare the stability of trade policy arrangements in two different regulatory scenarios, one with and one without Preferential Trade Agreements (PTAs), i.e. current vs. modified WTO rules. Unlike the existing literature, our paper considers an extensive choice set of trade constellations, containing both available PTAs, Customs Unions (CUs) and Free Trade Agreements (FTAs), as well as Multilateral Trade Agreements (MTAs), while assuming unlimited farsightedness of the negotiating parties. With symmetric countries and under both the current and the modified WTO rules, the Global Free Trade (GFT) regime emerges as the unique stable outcome. In the case of asymmetry, the results are driven by the relative size of the countries. If the world is in the vicinity of symmetry and two out of three countries are close to identical while relatively smaller than the other one, the area where the GFT regime is stable increases when prohibiting PTAs. However, when two similar countries are relatively larger, the availability of PTAs is conducive to the stability of the GFT regime. Finally, if the world is further away from symmetry, full trade liberalization is not attainable at all and an area where the Most-Favoured-Nation (MFN) regime is stable appears in the scenario without PTAs. Thus, the direction of the effect of PTAs on trade liberalization depends on the degree of asymmetry among countries.
Zur Auswertung der Funde aus der slawisch-deutschen Burganlage von Meetschow, Gemeinde Gorleben, Kr. Lüchow-Dannenberg
Creators: name: Reichstein, Hans
name: Schenkel, Wolfgang
name: Steuer, Heiko
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: -
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 45 (1976): Nachrichten aus Niedersachsens Urgeschichte
Mechanical properties of co-extruded aluminium-steel compounds
Creators: name: Thürer, Susanne Elisabeth
name: Uhe, Johanna
name: Golovko, Oleksandr
name: Bonk, Christian
name: Bouguecha, Anas
name: Behrens, Bernd-Arno
name: Klose, Christian
Publisher: name: Pfaffikon : Scientific.Net
Year: 2017
Subjects: subject: Co-extrusion
subject: De-bonding shear stress
subject: Intermetallic phases
subject: Alloy steel
subject: Aluminum
subject: Binary alloys
subject: Case hardening
subject: Chains
subject: Chromium alloys
subject: Connecting rods
subject: Forging
subject: Joining
subject: Manganese alloys
subject: Mechanical properties
subject: Shear stress
subject: Tensile strength
subject: Tensile testing
subject: Tubular steel structures
subject: Tungsten alloys
subject: Upsetting (forming)
subject: Welding
subject: Welding rods
subject: Bonding shear stress
subject: Case hardening steels
subject: Collaborative research
subject: Functional surfaces
subject: Intermetallic phasis
subject: Micro tensile tests
subject: Process parameters
subject: Semi-finished products
subject: Extrusion
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie

description: Within the scope of the Collaborative Research Centre (CRC) 1153 novel process chains for the production of hybrid solid components by Tailored Forming are developed at the Leibniz Universität Hannover. The combination of e. g. aluminium with steel allows to produce hybrid compounds with wear-resistant functional surfaces and reduced weight. In these process chains, joining takes place as the first step to produce hybrid semi-finished products by friction welding, cladding, ultrasonic assisted laser welding or co-extrusion, which are subsequently subjected to various forming processes such as forging or impact extrusion. The coaxially joined hybrid semifinished components investigated in this work were produced by means of the lateral angular co-extrusion (LACE) process using the aluminium alloy EN AW-6082 and the case-hardening steel 20MnCr5. These semi-finished products shall be suited to produce hybrid bearing bushings by die forging in a subsequent process step. Initial investigations for the determination of the process parameters and the appropriate tool geometry were made using a steel rod. In future investigations, a steel tube will replace the steel rod in order to produce hybrid semi-finished products, which can be fully integrated into the process chain. The mechanical properties of the profile were determined at different positions along its length. For this purpose, the quality of the joining zone between aluminium and steel as a function of the profile position was examined by means of push-out tests. Moreover, the mechanical properties of the aluminium component's longitudinal weld seam were determined by micro-tensile-tests. © 2017 Trans Tech Publications, Switzerland.
Cosmology in Palatini theories of gravity
Creators: name: Olmo, Gonzalo J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss recent results on the cosmology of extended theories of gravity formulated in the Palatini approach, i.e., assuming that metric and connection are independent fields. In particular, we focus on the attempts to explain the cosmic speedup with f(R) theories and on models that avoid the big bang singularity. The field equations for gravity Lagrangians of the form f(g_{μν},{R^α}_{βμν}) (including torsion) are explicitly derived and discussed.
description: 16 pages, no figures. Contribution to the Proceedings of Spanish Relativity Meeting ERE2011, Madrid 29 August - 2 September 2011 . Plenary talk
Growth mechanism for alternating supply epitaxy
Creators: name: Wang, Li
name: Dimitrijev, Sima
name: Fissel, Andreas
name: Walker, Glenn
name: Chai, Jessica
name: Hold, Leonie
name: Fernandes, Alanna
name: Nguyen, Nam-Trung
name: Iacopi, Alan
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2016
Subjects: subject: silicon
subject: 3C-SiC
subject: alternating supply epitaxy (ASE), nanotechnology
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Low-cost large-diameter cubic silicon carbide (3C-SiC) film grown on silicon (Si) has been demonstrated to have a wide range of applications in photonics, electronics, photoelectrochemistry and micro-electro-mechanical system technologies. In this paper, the epitaxial growth of SiC on Si by low-pressure chemical vapour deposition is investigated. Two modes were employed to supply the precursors: the alternating supply and the simultaneous supply. Compared with SiC films grown at the same temperature by simultaneous supply epitaxy method, the SiC grown by alternating supply epitaxy (ASE) method has better crystallinity, smoother surface, and better thickness uniformity as confirmed by X-ray diffraction and atomic force microscopy characterisation. We propose the growth mechanism for ASE growth of 3C-SiC and validate it in detail experimentally. It is found that, Si deposition on SiC follows either Stranski–Krastanov mode or island growth mode, while SiC formation proceeds in two possible reaction paths: redistributing of the formed Si islands or smoothing of the formed SiC islands by decomposition migration process. Both reaction paths are driven by minimizing the surface free energy and reducing dangling bonds density. In summary, the key features of ASE are: (1) Si has a longer diffusion length and thus higher probability to adhere to a crystallographically favourable position; (2) undesirable gas phase reactions can be avoided. The obtained results indicate that ASE is a unique and economically viable method to prepare uniform 3C-SiC on multiple large-diameter Si wafers.
Homomorphic wavelet shrinkage and feature emphasis for speckle reduction and enhancement of echocardiographic images
Creators: name: Zong, Xuli
name: Geiser, Edward A.
name: Laine, Andrew F.
name: Wilson, David C.
Publisher: name: Columbia University
Year: 1996
Subjects: Medicine
Biomedical engineering

description: An approach for speckle reduction and feature enhancement under a framework of multiscale wavelet analysis is presented. The advantages of both soft thresholding and hard thresholding wavelet shrinkage techniques are utilized to eliminate noise and preserve the sharpness of salient features. We integrate a method of wavelet shrinkage with nonlinear processing to enhance contrast within structures and along object boundaries. Feature restoration and enhancement are accomplished by modifying the gain of a signal's variational energy. In this study, we focus on multiplicative noise, such as speckle noise. We show that this algorithm is capable of enhancing features of interest, such as endocardial and epicardial boundaries in 2-D short-axis echocardiograms while at the same time reducing speckle. Speckle is modeled as multiplicative noise, and approximated by additive stationary Gaussian white noise on a logarithmic scale. In our algorithm, shrinkage of wavelet coefficients via soft thresholding within finer scales is carried out on coefficients of logarithmically transformed echocardiograms. Nonlinear feature emphasis combined with hard thresholding within middle levels of transform space are performed subsequently on wavelet coefficients. The first operation reduces speckle while the second step accomplishes structure and object boundary enhancement. Preliminary results suggest that the algorithm can remove speckle noise and enhance contrast along boundaries of importance to cardiologists. We have applied this algorithm to echocardiograms of varying quality, and present both experimental analysis and sample results.
Eine neolithische Arbeitsaxt aus der Gemarkung Höckelheim, Stadt Northeim, Kr. Northeim
Creators: name: Merl, Günter
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: -
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 45 (1976): Nachrichten aus Niedersachsens Urgeschichte
A Waste Collection Problem with Service Type Option
Creators: name: Gläser, Sina
Publisher: name: Bielefeld University, Department of Business Administration and Economics
Year: 2021
Subjects: subject: 330
subject: Combinatorial optimization
subject: Waste collection
subject: Vehicle routing
subject: ALNS

description: Efficient solid waste management is one of the most relevant issues for urban communities. With regard to the service type of household waste collection, there are two approaches in practice: When collecting household waste via a door-to-door system, the collection vehicles drive down all the streets to empty the garbage cans on the curb. Using a bring system, waste is accumulated at central collection sites with a larger capacity. While residents do have to travel an additional distance to dispose of their waste at these central collection sites, a bring system can reduce the distance to be covered by collection vehicles because they no longer have to drive down all the streets. To combine the advantages of both systems, in this article the service type decision is introduced. The corresponding waste collection problem with service type option (WCPSTO) is modeled as a new variant of a periodic location routing problem and an adaptive large neighborhood search-based solution approach is proposed. This solution approach not only solves the newly presented problem, but also outperforms a solution algorithm for a related waste collection problem seen in the literature, which can be seen as a special case of the WCPSTO.
Computation of Balanced Equivalence Relations and their Lattice for a Coupled Cell Network
Creators: name: Kamei, Hiroko
name: Cock, Peter J. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: A coupled cell network describes interacting (coupled) individual systems (cells). As in networks from real applications, coupled cell networks can represent inhomogeneous networks where different types of cells interact with each other in different ways, which can be represented graphically by different symbols, or abstractly by equivalence relations. Various synchronous behaviors, from full synchrony to partial synchrony, can be observed for a given network. Patterns of synchrony, which do not depend on specific dynamics of the network, but only on the network structure, are associated with a special type of partition of cells, termed balanced equivalence relations. Algorithms in Aldis (2008) and Belykh and Hasler (2011) find the unique pattern of synchrony with the least clusters. In this paper, we compute the set of all possible patterns of synchrony and show their hierarchy structure as a complete lattice. We represent the network structure of a given coupled cell network by a symbolic adjacency matrix encoding the different coupling types. We show that balanced equivalence relations can be determined by a matrix computation on the adjacency matrix which forms a block structure for each balanced equivalence relation. This leads to a computer algorithm to search for all possible balanced equivalence relations. Our computer program outputs the balanced equivalence relations, quotient matrices, and a complete lattice for user specified coupled cell networks. Finding the balanced equivalence relations of any network of up to 15 nodes is tractable, but for larger networks this depends on the pattern of synchrony with least clusters.
description: 31 pages. Accepted for publication at SIAM Journal on Applied Dynamical Systems (SIADS), preprint submitted to arXiv with SIAM's permission. For supplementary material, see https://github.com/peterjc/ccn
Impact of vibrational entropy on the stability of unsolvated peptide helices with increasing length
Creators: name: Rossi, Mariana
name: Blum, Volker
name: Scheffler, Matthias
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Biological Physics (physics.bio-ph)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Helices are a key folding motif in protein structure. The question which factors determine helix stability for a given polypeptide or protein is an ongoing challenge. Here we use van der Waals corrected density-functional theory to address a part of this question in a bottom-up approach. We show how intrinsic helical structure is stabilized with length and temperature for a series of experimentally well studied unsolvated alanine based polypeptides, Ac-Alan-LysH+. By exploring extensively the conformational space of these molecules, we find that helices emerge as the preferred structure in the length range n=4-8 not just due to enthalpic factors (hydrogen bonds and their cooperativity, van der Waals dispersion interactions, electrostatics), but importantly also by a vibrational entropic stabilization over competing conformers at room temperature. The stabilization is shown to be due to softer low-frequency vibrational modes in helical conformers than in more compact ones. This observation is corroborated by including anharmonic effects explicitly through \emph{ab initio} molecular dynamics, and generalized by testing different terminations and considering larger helical peptide models.
Significant genetic differentiation of Gobiopterus lacustris, a newly recorded transparent goby in China
Creators: name: Wang, Zhong-Duo
name: Liao, Jian
name: Huang, Cheng-Qin
name: Long, Shui-Sheng
name: Zhang, Shun
name: Guo, Yu-Song
name: Liu, Li
name: Liu, Chu-Wu
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: In our recent survey, the transparent small Lacustrine goby, Gobiopterus lacustris had reported as the endemic species of Luzon, Philippines, was identified as an abundant species in mangroves of Leizhou Peninsula, China. Here, high diversity and significant differentiation of five sites of samples representing the west and east populations were revealed by mitochondrial DNA sequences. Five haplotypes of 56 cytochrome oxidase subunit I (Cox1) with the lengths of 623 base pairs (bp) have the high pairwise identity (>98.8%). Moreover, a total of 31 haplotypes for 129 partial D-loop regions were clustered into two clades corresponding to the east and west sampling sites. The strong population structure was confirmed (ΦST = 0.43017, p < .0001) with high haplotype diversity (h = 0.880 ± 0.017) and low nucleotide diversity (p=.00484). Moreover, both the mismatch distribution analysis and neutral test of D-loop revealed that the west group might experience a recent demographic expansion. Lastly, the isolation-with-migration analysis supported the expansion and indicated that the east–west split happened at approximately 7.1 kyr ago. Given the distribution and diversity, G. lacustris could be a good model for the study of the sea-level fluctuations and coast evolution of the South China Sea.
A method for extracting the resonance parameters from experimental cross section
Creators: name: Rakityansky, S. A.
name: Elander, N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The matrix elements of the multi-channel Jost matrices are written in such a way that their dependencies on all possible odd powers of channel momenta are factorized explicitly. As a result the branching of the Riemann energy surface at all the channel thresholds is represented in them via exact analytic expressions. The remaining single-valued functions of the energy are expanded in the Taylor series near an arbitrary point on the real axis. Using the thus obtained Jost matrices, the $S$-matrix is constructed and then the scattering cross section is calculated, which therefore depends on the Taylor expansion coefficients. These coefficients are considered as the adjustable parameters that are optimized to fit a given set of experimental data. After finding the coefficients, the resonances are located as zeros of the Jost matrix determinant at complex energies. Within this approach the $S$-matrix has proper analytic structure. This enables us not only to locate multi-channel resonances but also to reproduce their partial widths as well as the scattering cross section in the channels for which the data are not available.
description: 22 pages, 8 figures, submitted to Journal of Physics A
Scannende Laser-Projektionseinheit für die Fahrzeugfrontbeleuchtung
Creators: name: Kloppenburg, Gerolf
Publisher: name: Garbsen : TEWISS Verlag
Year: 2017
Subjects: subject: driver assistance
subject: laser diode
subject: micro scanner
subject: vehicle lighting
subject: Fahrerassistenz
subject: Laserdiode
subject: Mikroscanner
subject: Fahrzeugbeleuchtung
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Die Forschung an neuartigen Beleuchtungssystemen für das Fahrzeug zielt darauf ab, dem Fahrer eine optimale Sicht und Ausleuchtung der Umgebung zu ermöglichen. Dies ist insbesondere vor dem Hintergrund relevant, dass der größte Teil der Informationen beim Fahren visuell aufgenommen wird. In Kombination mit Daten aus der Fahrzeugsensorik können dazu Bilder generiert werden, die den Fahrer in vielen Situationen unterstützen und so dabei helfen, Unfälle zu vermeiden. Gegenwärtige Entwicklungen im Bereich der Fahrzeugscheinwerfer haben bereits zum Ziel, eine möglichst große Anzahl von Lichtsegmenten vor dem Fahrzeug individuell anzusteuern um eine situationsangepasste Ausleuchtung des Verkehrsraums zu ermöglichen. Im Hinblick auf autonom fahrende Fahrzeuge gewinnt zusätzlich dazu auch die Kommunikation mit anderen Verkehrsteilnehmern, gegebenenfalls aber auch mit den Fahrzeuginsassen an zusätzlicher Bedeutung. Als nächster Schritt in der lichtbasierten Fahrerassistenz werden im Rahmen dieser Arbeit Informationsprojektionen in den Verkehrsraum zur Unterstützung des Fahrers behandelt. Ziel ist der Aufbau eines geeigneten Projektors für die Darstellung farbiger Fahrerassistenzinformationen im Verkehrsraum. Dazu werden die Anforderungen an den optischen Aufbau eines solchen Systems erarbeitet. Besondere Berücksichtigung finden dabei die benötigte Lichtmenge für die Sichtbarkeit der Darstellung, der darstellbare Farbraum, der Bereich, in dem eine Projektion erfolgen sollte und die Ansteuerung der Lichtquelle für die Bilderzeugung. Aufbauend auf den Anforderungen werden Konzepte für die Umsetzung der hochauflösenden Bilderzeugung erarbeitet und bewertet. Die Umsetzung erfolgt in Form eines Demonstrators mit drei Laserdioden in den Farben rot, grün und blau zur Erzeugung einer Farbmischung und in Kombination mit einem scannend eingesetzten Mikrospiegel für die Bilderzeugung. Anhand dieses Systems werden die Einsatzmöglichkeiten für die Darstellung von Fahrerassistenzinformationen evaluiert.
Forming an O Star via Disk Accretion?
Creators: name: Qiu, Keping
name: Zhang, Qizhou
name: Beuther, Henrik
name: Fallscheer, Cassandra
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a study of outflow, infall, and rotation in a ~10^5 Lsun (solar luminosity) star-forming region, IRAS 18360-0537, with Submillimeter Array (SMA) and IRAM 30m observations. The 1.3 mm continuum map shows a 0.5 pc dust ridge, of which the central compact part has a mass of ~80 Msun (solar mass) and harbors two condensations, MM1 and MM2. The CO (2--1) and SiO (5--4) maps reveal a biconical outflow centered at MM1, which is a hot molecular core (HMC) with a gas temperature of 320+/-50 K and a mass of ~13 Msun. The outflow has a gas mass of 54 Msun and a dynamical timescale of 8,000 yr. The kinematics of the HMC is probed by high-excitation CH3OH and CH3CN lines, which are detected at sub-arcsecond resolution and unveil a velocity gradient perpendicular to the outflow axis, suggesting a disk-like rotation of the HMC. An infalling envelope around the HMC is evidenced by CN lines exhibiting a profound inverse P-Cygni profile, and the estimated mass infall rate, 1.5x10^{-3} Msun/yr, is well comparable to that inferred from the mass outflow rate. A more detailed investigation of the kinematics of the dense gas around the HMC is obtained from the 13CO and C18O (2--1) lines; the position-velocity diagrams of the two lines are consistent with the model of a free-falling and Keplerian-like rotating envelope. The observations suggest that the protostar of a current mass ~10 Msun embedded within MM1 will develop into an O star via disk accretion and envelope infall.
description: Accepted for publication in the ApJ
Ein bemerkenswertes Beigefäß aus Soderstorf, Kr. Lüneburg
Creators: name: Ahrens, Claus
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: -
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 45 (1976): Nachrichten aus Niedersachsens Urgeschichte
Eine Siedlung der älteren vorrömischen Eisenzeit bei Oldendorp (Unterems) mit Aussagen zu Umwelt, Ackerbau und Sedimentationsgeschehen
Creators: name: Brandt, Klaus
name: Behre, Karl-Ernst
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: -
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 45 (1976): Nachrichten aus Niedersachsens Urgeschichte
Returning magnetic flux in sunspot penumbrae
Creators: name: Cobo, B. Ruiz
name: Ramos, A. Asensio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We study the presence of reversed polarity magnetic flux in sunspot penumbra. We applied a new regularized method to deconvolve spectropolarimetric data observed with the spectropolarimeter SP onboard Hinode. The new regularization is based on a principal component decomposition of the Stokes profiles. The resulting Stokes profiles were inverted to infer the magnetic field vector using SIR. We find, for the first time, reversed polarity fields at the border of many bright penumbral filaments in the whole penumbra.
description: 5 pages, 5 figures, accepted for publication in A&A Letters
Ein Reihengräberfeld in Osnabrück, Stadtteil Schölerberg
Creators: name: Schlüter, Wolfgang
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: -
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 45 (1976): Nachrichten aus Niedersachsens Urgeschichte
NÃO APRENDERAM COMA GUERRA?
Creators: name: Santana, José Cláudio Pavão
Publisher: name: Zenodo - Cadernos da Pena do Pavao
Year: 2023

description: Ano 09 – vol. 01 – n. 04/2021
As redes sociais estã o sacudidas pela decisão unilateral de banimento de contas como Twitter, Instagram e Facebook do presidente Donald Trump.
Não fosse a recente chegada do ano de 2021 e pareceria que estamos em plena guerra fria. Aliás, parece que ela ressurgiu sem qualquer acanhamento.
GYY Final Report Supplementary Files
Creators: name: Parkinson, Gillian
name: Fi Rose
name: Fairhurst, Caroline
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Medicine and Health Sciences
subject: Randomised Controlled Trial
subject: CONSORT
subject: Gentle Years Yoga
subject: GYY
subject: SAP
subject: RCT
subject: HEAP

description: This registration contains the following five documents for the publication relating to the Gentle Years Yoga final report: the CONSORT Checklist, the CHEERS checklist, SAP, HEAP and Cost-effectiveness analysis methods. These documents are not included in any other registration or repository.
Aspects of dynamical dimensional reduction in multigraph ensembles of CDT
Creators: name: Giasemidis, Georgios
name: Wheater, John F.
name: Zohren, Stefan
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the continuum limit of a "radially reduced" approximation of Causal Dynamical Triangulations (CDT), so-called multigraph ensembles, and explain why they serve as realistic toy models to study the dimensional reduction observed in numerical simulations of four-dimensional CDT. We present properties of this approximation in two, three and four dimensions comparing them with the numerical simulations and pointing out some common features with 2+1 dimensional Horava-Lifshitz gravity.
description: 4 pages, 1 figure, Presented at "Gravity, Quantum, and Black Holes" session of IC-MSQUARE 2012, Budapest, to appear in the proceedings, IOP Conference Series
Polarized Structure Functions and Two-Photon Physics at Super-B
Creators: name: Shore, G. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The potential of polarized, high-luminosity, moderate-energy e+e- colliders for performing unique measurements in fundamental QCD is described, with particular reference to the proposed Super-B facility. An extensive programme of 2-photon physics is proposed, focusing on measurements of the polarized photon structure functions g1 and g2 and pseudoscalar meson transition functions. The experimental requirements for Super-B to make the first measurement of the first moment sum rule for the off-shell polarized photon structure function g1(x,Q^2;K^2) are described in detail. Cross-section formulae and experimental issues for investigations of NLO and higher-twist effects in g1 and g2 together with exclusive 2-photon meson production are presented. This programme of QCD studies complements the core mission of Super-B as a high-luminosity B factory investigating flavour physics and rare processes signaling new physics beyond the standard model.
description: 29 pages, 8 figures
Two-center interference and ellipticity in high-order harmonic generation from H2+
Creators: name: Van Der Zwan, Elmar V.
name: Lein, Manfred
Publisher: name: College Park, MD : American Physical Society
Year: 2010
Subjects: subject: Alignment angle
subject: Coulombic potentials
subject: Emitted radiation
subject: Gaussian Wave Packets
subject: High order harmonic generation
subject: Laser fields
subject: Laser induced
subject: Polarization direction
subject: Single electronics
subject: Theoretical investigations
subject: Two-center interference
subject: Alignment
subject: Harmonic generation
subject: Trajectories
subject: Wave packets
subject: Waves
subject: Harmonic analysis
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We present a theoretical investigation into the two-center interference in aligned H2+. The influence of the laser field on the recombination step is investigated by comparing laser-induced harmonic generation with harmonic generation from field-free collisions of Gaussian wave packets with the core. We find that for different Gaussian wave packets colliding with the molecule, the interference minimum occurs at the same alignment angle. The same result is obtained for the laser-induced spectrum when only a single electronic trajectory per harmonic contributes. When multiple electronic trajectories contribute, we find an effect on the minimum position because the interference between short and long trajectories is alignment dependent. The two-center interference and the influence of the Coulombic potential are clearly seen not only in the harmonic intensity and phase but also in the polarization direction and ellipticity. We observe significant ellipticity of the emitted radiation around the two-center interference minimum. © 2010 The American Physical Society.
Bibliographie zur Ur- und Frühgeschichte Niedersachsens 1975
Creators: name: Maier, Reinhard
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: -
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 45 (1976): Nachrichten aus Niedersachsens Urgeschichte
Additional file 3 of Effect of sodium–glucose cotransporter 2 inhibitors on cardiac structure and function in type 2 diabetes mellitus patients with or without chronic heart failure: a meta-analysis
Creators: name: Yu, Yi-Wen
name: Zhao, Xue-Mei
name: Wang, Yun-Hong
name: Zhou, Qiong
name: Huang, Yan
name: Zhai, Mei
name: Zhang, Jian
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer

description: Additional file 3: Figure S2. Funnel plots for publication bias assessment. (a) LVMI; (b) LVEDVI; (c) LVESVI; (d) LAVI; (e) LVEF; (f) GLS; (g) E/e’; (h) NT-proBNP; (i) KCCQ.
Advanced Optics Experiments Using Nonuniform Aperture Functions
Creators: name: Wood, Lowell T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A method to create instructive, nonuniform aperture functions using spatial frequency filtering is described. The diffraction from a single slit in the Fresnel limit and the interference from a double slit in the Fraunhofer limit are spatially filtered to create electric field distributions across an aperture to produce apodization, inverse apodization or super-resolution, and apertures with phase shifts across their widths. The diffraction effects from these aperture functions are measured and calculated. The excellent agreement between the experimental results and the calculated results makes the experiment ideal for use in an advanced undergraduate or graduate optics laboratory to illustrate experimentally several effects in Fourier optics.
Gisela Freund und Ludwig Reisch (Hrsg.), Sesselfelsgrotte VI. Naturwissenschaftliche Untersuchungen: Wirbeltierfauna 1. Das Paläolithikum und Mesolithikum des Unteren Altmühltals II
Creators: name: Serangeli, Jordi
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Gisela Freund und Ludwig Reisch (Hrsg.), Sesselfelsgrotte VI. Naturwissenschaftliche Untersuchungen: Wirbeltierfauna 1. Das Paläolithikum und Mesolithikum des Unteren Altmühltals II. Franz Steiner Verlag, Stuttgart. 2014. 195 Seiten, 149 schwarzweiß Abbildungen, 60 Tabellen. Gebunden 79,00 €. ISBN 978-3-515-10603-0
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 84 (2015): Nachrichten aus Niedersachsens Urgeschichte
5,6,7,4′-Tetramethoxyflavanone attenuates NADPH oxidase 1/4 and promotes sirtuin-1 to inhibit cell stress, senescence and apoptosis in Aβ25-35–mediated SK-N-SH dysfunction
Creators: name: Jumnongprakhon, Pichaya
name: Chokchaisiri, Ratchanaporn
name: Thummayot, Sarinthorn
name: Suksamrarn, Apichart
name: Tocharus, Chainarong
name: Tocharus, Jiraporn
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2021
Subjects: 5,6,7,4’-tetramethoxyflavanone
apoptosis
NOX1/4
senescence
sirtuin-1

description: Amyloidogenesis is a fundamental step of amyloid beta (Aβ) generation-induced toxicity that is commonly reported to disrupt neuronal circuits, function and survival in Alzheimer’s disease (AD). The neuroprotective effect of 5,6,7,4’-tetramethoxyflavanone (TMF) from Chormolaela odorata extract on brain degeneration and amyloidogenesis has previously been demonstrated. However, the mechanistic evidence for TMF’s effects is still unclear. In this study, we evaluated the neuroprotective effect of TMF in Aβ25-35-induced toxicity in SK-N-SH neuroblastoma cells. Herein, we demonstrated that TMF exhibited potent antioxidant activity and significantly increased cell viability and decreased ROS production in a dose-dependent manner. Moreover, TMF reversed the effect of Aβ25-35, which caused energy deprivation and apoptosis, by decreasing the ratio of Bax/Bcl-xL and reducing mitochondrial membrane potential (Δψm), caspase-3 expression, apoptotic cells, and attenuating glucose transporter (Glut-3) expression. In addition, TMF protected against Aβ25-35-induced cellular senescence by attenuating β-galactosidase, p-21 and p-53 expression and promoted the expression of Sirt-1 and p-Rb. In addition, the effects of TMF on Aβ25-35 toxicity were related to the upregulation of phase II antioxidant and nuclear factor erythroid 2-related factor-2 (Nrf2) signaling, including superoxide dismutase (SOD), heme oxygenase (HO)-1, and nuclear translocation of Nrf2. Finally, we also found that TMF attenuated Aβ25-35-reduced synaptic plasticity by increasing the expression of synaptophysin and PSD-95, which was correlated with a decrease in acetylcholine esterase (AChE). Importantly, we found that the protective effects of TMF on Aβ25-35 were bidirectional, including marked inhibition of NADPH oxidase (NOX)-4 activity and partial activation of Sirt-1, which occurred prior to a reduction in the negative responses. Therefore, TMF may be useful for treating Aβ toxicity in AD.
description: EXCLI Journal; 20:Doc1346; ISSN 1611-2156
Radiative Corrections to the Neutralino Dark Matter Relic Density - an Effective Coupling Approach
Creators: name: Chatterjee, Arindam
name: Drees, Manuel
name: Kulkarni, Suchita
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the framework of the minimal cosmological standard model, the $Λ$CDM model, the Dark Matter density is now known with an error of a few percent; this error is expected to shrink even further once PLANCK data are analyzed. Matching this precision by theoretical calculations implies that at least leading radiative corrections to the annihilation cross section of the dark matter particles have to be included. Here we compute one kind of large corrections in the context of the minimal supersymmetric extension of the Standard Model: corrections associated with two-point function corrections on chargino and neutralino lines. These can be described by effective chargino/neutralino-fermion-sfermion and chargino/neutralino-chargino/neutralino-Higgs couplings. We also employ one-loop corrected chargino and neutralino masses, using a recently developed version of the on-shell renormalization scheme. The resulting correction to the predicted Dark Matter density depends strongly on parameter space, but can easily reach 3%.
description: 37 pages, 6 figures
Production of Ultracold Molecules with Chirped Nanosecond Pulses: Evidence for Coherent Effects
Creators: name: Carini, J. L.
name: Pechkis, J. A.
name: Rogers, C. E.
name: Gould, P. L.
name: Kallush, S.
name: Kosloff, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We use frequency-chirped light on the nanosecond time scale to produce ultracold $^{87}$Rb$_{2}$ molecules in the lowest triplet state via the process of photoassociation. Comparing to quantum simulations of the molecular formation, we conclude that coherent stimulated emission plays an important role and is primarily responsible for the significant difference observed between positive and negative chirps.
description: 5 pages, 4 figures
Manufacturing of embedded multimode waveguides by reactive lamination of cyclic olefin polymer and polymethylmethacrylate
Creators: name: Kelb, Christian
name: Rother, Raimund
name: Schuler, Anne-Katrin
name: Hinkelmann, Moritz
name: Rahlves, Maik
name: Prucker, Oswald
name: Müller, Claas
name: Rühe, Jürgen
name: Reithmeier, Eduard
name: Roth, Bernhard
Publisher: name: Bellingham, WA : S P I E - International Society for Optical Engineering
Year: 2016
Subjects: subject: optical sensing
subject: optical waveguides
subject: photonic technologies
subject: reactive lamination
subject: Interfaces (materials)
subject: Manufacture
subject: Materials testing apparatus
subject: Olefins
subject: Optical waveguides
subject: Polyesters
subject: Polymers
subject: Tensile testing
subject: Waveguides
subject: Attenuation measurements
subject: Manufacturing parameters
subject: Micro-optical structure
subject: Multimode optical waveguides
subject: Optical sensing
subject: Photonic technologies
subject: Tensile testing machines
subject: Laminating
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We demonstrate the manufacturing of embedded multimode optical waveguides through linking of polymethylmethacrylate (PMMA) foils and cyclic olefin polymer (COP) filaments based on a lamination process. Since the two polymeric materials cannot be fused together through interdiffusion of polymer chains, we utilize a reactive lamination agent based on PMMA copolymers containing photoreactive 2-acryloyloxyanthraquinone units, which allows the creation of monolithic PMMA-COP substrates through C-H insertion reactions across the interface between the two materials. We elucidate the lamination process and evaluate the chemical link between filament and foils by carrying out extraction tests with a custom-built tensile testing machine. We also show attenuation measurements of the manufactured waveguides for different manufacturing parameters. The lamination process is in particular suited for large-scale and low-cost fabrication of board-level devices with optical waveguides or other micro-optical structures, e.g., optofluidic devices. © 2016 Society of Photo-Optical Instrumentation Engineers (SPIE).