cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Phytate utilization of maize mediated by different nitrogen forms in a plant–arbuscular mycorrhizal fungus–phosphate-solubilizing bacterium system
Creators: name: Ding, Xiaodong
name: Zhang, Lin
name: Zhang, Shirong
name: Feng, Gu
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology
subject: Computational Biology

description: A pot experiment was conducted to investigate the organic phosphorus (P) (phytate) utilization of Zea mays L. with different nitrogen (N) forms (NH4+ and NO3−) when both arbuscular mycorrhizal (AM) fungus (Funelliformis mosseae) and phosphate-solubilizing bacterium (PSB, Pseudomonas alcaligenes) are present. The soil was supplied with either KNO3 or (NH4)2SO4 (200 mg kg−1 N) with or without phytin (75 mg P kg−1). Results showed that the application of NH4+ to the soil in a plant–AM fungus–PSB system decreased rhizosphere pH and increased phosphatase activity. It also enhanced the mineralization rate of phytin, which resulted in the release of more inorganic P. The application of NO3− promoted mycorrhizal colonization and hyphal length density in the soil. The inorganic P in the hyphosphere decreased, but more P was transferred to the plant through the mycorrhizal hyphae. Hence, in addition, the application of the two different N forms did not significantly alter the content of plant P. The plant supplied with different N fertilizers acquired P through different mechanisms associated with other microbes. NH4+ application promoted phytin mineralization by decreasing soil pH, whereas NO3− application increased inorganic P uptake by strengthening the mycorrhizal pathway.
Observation of Ultra-high-energy Cosmic Rays with the ANITA Balloon-borne Radio Interferometer
Creators: name: Hoover, S.
name: Nam, J.
name: Gorham, P. W.
name: Grashorn, E.
name: Allison, P.
name: Barwick, S. W.
name: Beatty, J. J.
name: Belov, K.
name: Besson, D. Z.
name: Binns, W. R.
name: Chen, C.
name: Chen, P.
name: Clem, J. M.
name: Connolly, A.
name: Dowkontt, P. F.
name: DuVernois, M. A.
name: Field, R. C.
name: Goldstein, D.
name: Vieregg, A. G.
name: Hast, C.
name: Hebert, C. L.
name: Israel, M. H.
name: Javaid, A.
name: Kowalski, J.
name: Learned, J. G.
name: Liewer, K. M.
name: Link, J. T.
name: Lusczek, E.
name: Matsuno, S.
name: Mercurio, B. C.
name: Miki, C.
name: Miočinović, P.
name: Naudet, C. J.
name: Ng, J.
name: Nichol, R. J.
name: Palladino, K.
name: Reil, K.
name: Romero-Wolf, A.
name: Rosen, M.
name: Ruckman, L.
name: Saltzberg, D.
name: Seckel, D.
name: Varner, G. S.
name: Walz, D.
name: Wu, F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We report the observation of sixteen cosmic ray events of mean energy of 1.5 x 10^{19} eV, via radio pulses originating from the interaction of the cosmic ray air shower with the Antarctic geomagnetic field, a process known as geosynchrotron emission. We present the first ultra-wideband, far-field measurements of the radio spectral density of geosynchrotron emission in the range from 300-1000 MHz. The emission is 100% linearly polarized in the plane perpendicular to the projected geomagnetic field. Fourteen of our observed events are seen to have a phase-inversion due to reflection of the radio beam off the ice surface, and two additional events are seen directly from above the horizon.
description: 5 pages, 5 figures, new figure added
Endophytes Aspergillus caespitosus LK12 and Phoma sp. LK13 of Moringa peregrina produce gibberellins and improve rice plant growth
Creators: name: Latif Khan, Abdul
name: Waqas, Muhammad
name: Hussain, Javid
name: Al-Harrasi, Ahmed
name: Al-Rawahi, Ahmed
name: Kim, Min-Ji
name: Lee, In-Jung
name: Al-Hosni, Khadija
name: Adnan, Muhammad
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Plant Biology
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Biological Sciences
subject: Ecology
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Microbiology
subject: Medicine

description: Two new strains of endophytic fungi were isolated from the bark of Moringa peregrina and identified as Aspergillus caespitosus LK12 and Phoma sp. LK13. These endophytes were identified through amplifying polymerase chain reaction (PCR) and sequencing the 18S internal transcribed spacer of DNA extracted from both endophytes. Pure cultures of endophytic fungi were subjected to extract and isolate gibberellins (GAs). Deuterated standards of [17,17-2H2]-GA1, [17,17-2H2]-GA3, [17, 17-2H2]-GA4 and [17, 17-2H2]-GA7 were used to quantify the endophytic fungal GAs. The analysis revealed that both the endophytes are producing bioactive GAs in various quantities (ng mL−1). A. caespitosus LK12 was producing GA1 (54.51 ± 1.23), GA4 (26.5 ± 0.65), and GA7 (2.87 ± 1.23) while Phoma sp. LK13 was secreting GA1 (4.8 ± 0.12), GA3 (8.65 ± 0.21), GA4 (23.7 ± 0.98), and GA7 (22.7 ± 0.73). The culture filtrate (CF) of A. caespitosus and Phoma sp. significantly increased the shoot length of GAs-deficient mutant waito-c and normal Dongjin-beyo rice seedlings as compared to control. Application of such growth-promoting and GAs-producing endophytes can ameliorate poorly growing crop plants.
Autonomous navigation of an unmanned aerial vehicle using infrared computer vision
Creators: name: Nowak, Ephraim
Publisher: name: University of British Columbia
Year: 2019

description: The goal of this thesis is to develop infrared (IR) vision-based navigation methods for small unmanned aerial vehicles (UAVs). As small unmanned aerial systems (sUAS) see increased use, this technology promises to benefit many civilian applications including agriculture, fire suppression, search and rescue, as well as military operations. Small UAVs have proliferated the market, ranging from pocket-sized photography drones controlled using a smartphone, to larger systems used in remote surveying and disaster response applications. UAVs share many commonalities with ubiquitous smartphones, including a powerful on-board processor or Central Processing Unit (CPU), gyroscope, compass, barometer, GPS, and electro-optical colour camera. Incorporating vision-based navigation methods in a UAV autopilot makes use of the on-board camera and processor (often standard features on drones) for precise localization and navigation, in environments where other sensors may fail or prove inaccurate. This work presents two types of high-level altitude and position control systems based on computer vision. Specifically, both navigation systems use IR technology; the first method uses an active IR beacon and computer vision methods to coordinate autonomous localization and landing of a small quadrotor UAV on a stationary platform. The autonomous IR-based landing method was tested using the AR.Drone quadcopter and a computer vision and control script developed in Python. The second method uses passive short-wave infrared (SWIR) and the Normalized Difference Vegetation Index (NDVI), used in remote sensing applications, to coordinate navigation of a small UAV in a GPS-denied indoor greenhouse environment. This method was integrated with a NAVIO2 autopilot to determine the UAV’s position and orientation in a greenhouse row. The real-time image processing pipeline includes machine vision principles such as binarization, thresholding, edge detection, and line detection. Both methods presented in this thesis use an eye-in-hand approach to the image-based visual servoing problem to navigate and land the UAV.
Complicity and Moral Accountability
Creators: name: Mellema, Gregory
Publisher: name: University of Notre Dame
Year: 2023

description: In Complicity and Moral Accountability, Gregory Mellema presents a philosophical approach to the moral issues involved in complicity. Starting with a taxonomy of Thomas Aquinas, according to whom there are nine ways for one to become complicit in the wrongdoing of another, Mellema analyzes each kind of complicity and examines the moral status of someone complicit in each of these ways. Mellema's central argument is that one must perform a contributing action to qualify as an accomplice, and that it is always morally blameworthy to perform such an action. Additionally, he argues that an accomplice frequently bears moral responsibility for the outcome of the other's wrongdoing, but he distinguishes this case from cases in which the accomplice is tainted by the wrongdoing of the principal actor. He further distinguishes between enabling, facilitating, and condoning harm, and introduces the concept of indirect complicity. Mellema tackles issues that are clearly important to any case of collective and shared responsibility, yet rarely discussed in depth, always presenting his arguments clearly, concisely, and engagingly. His account of the nonmoral as well as moral qualities of complicity in wrongdoing-especially of the many and varied ways in which principles and accomplices can interact-is highly illuminating. Liberally sprinkled with helpful and nuanced examples, Complicity and Moral Accountability vividly illustrates the many ways in which one may be complicit in wrongdoing.\u000a\u000a\u00A9 University of Notre Dame\u000a\u000aCopyright for most content is held by The University of Notre Dame. Reproduction of all or any portion of content constitutes a violation of copyright. You must obtain permission from The Copyright Clearance Center or The University of Notre Dame Press in order to reprint (or adapt) content.\u000a\u000ap: (574) 631-6346 \ e: undpress@nd\.edu \ website: copyright\.com
Phytate utilization of maize mediated by different nitrogen forms in a plant–arbuscular mycorrhizal fungus–phosphate-solubilizing bacterium system
Creators: name: Ding, Xiaodong
name: Zhang, Lin
name: Feng, Gu
name: Zhang, Shirong
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Plant Biology
subject: FOS: Biological sciences
subject: Biological Sciences
subject: Ecology
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Biotechnology
subject: Microbiology

description: A pot experiment was conducted to investigate the organic phosphorus (P) (phytate) utilization of Zea mays L. with different nitrogen (N) forms (NH4+ and NO3−) when both arbuscular mycorrhizal (AM) fungus (Funelliformis mosseae) and phosphate-solubilizing bacterium (PSB, Pseudomonas alcaligenes) are present. The soil was supplied with either KNO3 or (NH4)2SO4 (200 mg kg−1 N) with or without phytin (75 mg P kg−1). Results showed that the application of NH4+ to the soil in a plant–AM fungus–PSB system decreased rhizosphere pH and increased phosphatase activity. It also enhanced the mineralization rate of phytin, which resulted in the release of more inorganic P. The application of NO3− promoted mycorrhizal colonization and hyphal length density in the soil. The inorganic P in the hyphosphere decreased, but more P was transferred to the plant through the mycorrhizal hyphae. Hence, in addition, the application of the two different N forms did not significantly alter the content of plant P. The plant supplied with different N fertilizers acquired P through different mechanisms associated with other microbes. NH4+ application promoted phytin mineralization by decreasing soil pH, whereas NO3− application increased inorganic P uptake by strengthening the mycorrhizal pathway.
Bandgap bowing and spontaneous ordering in ZnSe_{x}Te_{1-x}
Creators: name: Freytag, B.
name: Pavone, Pasquale
name: Rössler, Ulrich
name: Wolf, K.
name: Lankes, S.
name: Schötz, G.
name: Naumov, A.
name: Jilka, S.
name: Stanzl, H.
name: Gebhardt, Wolfgang
Publisher: name: Universität Regensburg
Year: 1995
Subjects: subject: A. semiconductors; B. crystal structure and symmetry; C. X-ray scattering; D. order-disorder effects; E. optical properties
subject: 530 Physik

description: We present the results of experimental investigations on bandgap bowing and spontaneous ordering in MOVPE grown ZnSe$_{x}$Te$_{1-x}$. The bowing parameter of b = 1.40 ± 0.05eV found from different optical measurements on our epilayers is slightly larger than values found earlier from bulk material, indicating the possibility of spontaneous ordering in our samples. Ab-initio calculations for Zn$_{2}$SeTe in the ordered CuAu- and CuPt-structures lean support to this possibility. In fact X-ray measurements performed on our samples with x = 0.39 and x = 0.54 show peaks, forbidden in the zincblende structure, which give evidence for spontaneous ordering in the CuPt structure. Author Keywords:
Boussinesq-like multi-component lattice equations and multi-dimensional consistency
Creators: name: Hietarinta, Jarmo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We consider quasilinear, multi-variable, constant coefficient, lattice equations defined on the edges of the elementary square of the lattice, modeled after the lattice modified Boussinesq (lmBSQ) equation, e.g., $\tilde y z=\tilde x-x$. These equations are classified into three canonical forms and the consequences of their multidimensional consistency (Consistency-Around-the-Cube, CAC) are derived. One of the consequences is a restriction on form of the equation for the $z$ variable, which in turn implies further consistency conditions, that are solved. As result we obtain a number of integrable multi-component lattice equations, some generalizing lmBSQ.
description: 24 pages
Lateral superlattices: On the observability of the magnetic band structure
Creators: name: Rotter, Peter
name: Suhrke, Michael
name: Rössler, Ulrich
Publisher: name: Universität Regensburg
Year: 1996
Subjects: subject: 530 Physik

description: We present a quantum mechanical calculation of the resistivity of a strongly modulated two-dimensional electron gas in a perpendicular magnetic field. For lattice constants of the order of the Fermi wavelength the classical picture of commensurate orbits breaks down and the magnetic band structure gains considerable influence. As a characteristic feature the longitudinal magneto-resistivity shows oscillations with a leading period of one flux quantum per unit cell which have their origin in the magnetic band structure. We find that they do only weakly depend on temperature and electron density and discuss the resulting necessary conditions for experimental observation.
Stimulated Raman adiabatic passage in a $Λ$-system in the presence of quantum noise
Creators: name: Scala, M.
name: Militello, B.
name: Messina, A.
name: Vitanov, N. V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We exploit a microscopically derived master equation for the study of STIRAP in the presence of decay from the auxiliary level toward the initial and final state, and compare our results with the predictions obtained from a phenomenological model previously used [P. A. Ivanov, N. V. Vitanov, and K. Bergmann, Phys. Rev. A 72, 053412 (2005)]. It is shown that our approach predicts a much higher efficiency. The effects of temperature are also taken into account, proving that in b-STIRAP thermal pumping can increase the efficiency of the population transfer.
description: 10 pages, 7 figures
Large $N$ reduction with the Twisted Eguchi-Kawai model
Creators: name: González-Arroyo, Antonio
name: Okawa, Masanori
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine the breaking of $Z_N$ symmetry recently reported for the Twisted Eguchi-Kawai model (TEK). We analyse the origin of this behaviour and propose simple modifications of twist and lattice action that could avoid the problem. Our results show no sign of symmetry breaking and allow us to obtain values of the large $N$ infinite volume string tension in agreement with extrapolations from results based upon straightforward methods.
description: latex file 14 pages, 4 figures
Far-infrared response of holes in quantum dots: band structure effects and the generalized Kohn's theorem.
Creators: name: Darnhofer, T.
name: Rössler, Ulrich
name: Broido, D. A.
Publisher: name: Universität Regensburg
Year: 1995
Subjects: subject: 530 Physik

description: We investigate theoretically the magnetic-field-dependent far-infrared response of holes confined in a quantum dot. In contrast to quantum dots with electrons, the mixing of heavy- and light-hole states prohibits a separation of the center-of-mass motion from the relative motion. This violation of the condition required to satisfy the generalized Kohn's theorem leads to a calculated absorption spectrum that is considerably more complex than the corresponding spectrum for quantum dots containing electrons.
Video Feedback in Preservice Key Word Signing Training (Rombouts et al., 2016)
Creators: name: Rombouts, Ellen
name: Meuris, Kristien
name: Maes, Bea
name: De Meyer, Anne-Marie
name: Zink, Inge
Publisher: name: ASHA journals
Year: 2022
Subjects: subject: 200101 Communication Studies
subject: FOS: Media and communications
subject: 200102 Communication Technology and Digital Media Studies

description: Purpose: Research has demonstrated that formal training is essential for professionals to learn key word signing. Yet, the particular didactic strategies have not been studied. Therefore, this study compared the effectiveness of verbal and video feedback in a key word signing training for future direct support staff.Method: Forty-nine future direct support staff were randomly assigned to 1 of 3 key word signing training programs: modeling and verbal feedback (classical method [CM]), additional video feedback (+ViF), and additional video feedback and photo reminder (+ViF/R). Signing accuracy and training acceptability were measured 1 week after and 7 months after training.Results: Participants from the +ViF/R program achieved significantly higher signing accuracy compared with the CM group. Acceptability ratings did not differ between any of the groups.Conclusion: Results suggest that at an equal time investment, the programs containing more training components were more effective. Research on the effect of rehearsal on signing maintenance is warranted.
Pressure dependence of static and dynamic ionicity of SiC polytypes
Creators: name: Wellenhofer, G.
name: Karch, K.
name: Pavone, Pasquale
name: Rössler, Ulrich
name: Strauch, Dieter
Publisher: name: Universität Regensburg
Year: 1996
Subjects: subject: 530 Physik

description: The ionicity of SiC polytypes and its pressure dependence is investigated by employing ab initio calculations using density-functional theory within the local-density approximation. Two approaches are used to quantify ionicity: a static one introduced by Garcia and Cohen involving a decomposition of the valence-charge density into symmetric and antisymmetric contributions with respect to the bond center and a dynamic one connected with Born effective charges. Both approaches yield increasing values of the ionicity which is in accordance with existing experimental data for 3C and 6H SiC for low hydrostatic pressure ( $\lt$= 0.2 Mbar). A decrease of ionicity at ultrahigh pressures (up to 1.2 Mbar) as quoted for 6H SiC cannot be confirmed by our calculations. We discuss possible explanations of such a discrepancy.
Instruction on Masses for special gatherings, May 15, 1969: Instruction on the manner of administering Holy Communion, May 29 , 1969. Congregation for Divine Worship.
Creators: name: Catholic Church.Congregatio Pro Cultu Divino.
Publisher: name: University of Notre Dame
Year: 2023

description:
 Title from cover.
 Translation of: Instructio de cultu mysterii eucharistici, Eucharisticum mysterium, n. 3a, 1967 -cf. p. 12, footnote 8.
 Instruction on the manner of administering Holy Communion.
Hyper-g Priors for Generalized Linear Models
Creators: name: Bové, Daniel Sabanés
name: Held, Leonhard
Publisher: name: arXiv
Year: 2010
Subjects: subject: Methodology (stat.ME)
subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: We develop an extension of the classical Zellner's g-prior to generalized linear models. The prior on the hyperparameter g is handled in a flexible way, so that any continuous proper hyperprior f(g) can be used, giving rise to a large class of hyper-g priors. Connections with the literature are described in detail. A fast and accurate integrated Laplace approximation of the marginal likelihood makes inference in large model spaces feasible. For posterior parameter estimation we propose an efficient and tuning-free Metropolis-Hastings sampler. The methodology is illustrated with variable selection and automatic covariate transformation in the Pima Indians diabetes data set.
description: 30 pages, 12 figures, poster contribution at ISBA 2010
Towards optimization of T-shaped quantum structures
Creators: name: Kiselev, A.
name: Rössler, Ulrich
Publisher: name: Universität Regensburg
Year: 1996
Subjects: subject: 530 Physik

description: An accurate analysis of the wire-like states at the T-shaped intersections of cleaved-edge overgrown (CEO) semiconductor quantum structures is presented with the accent on their optimization for high-temperature laser device applications. This is done by making the proper choice of the structure geometry, which gives the largest energy separation between quasi-2D and quasi-1D exciton states. As a possible modification of the simple T-shaped structure, consistent with the CEO technique, we propose a double T-shaped intersection, with an even stronger binding of the quasi-1D state.
Molecular and cellular studies of host-mediated proteolytic maturation of dengue virus serotypes 1–4
Creators: name: McArthur, Steven J.
Publisher: name: University of British Columbia
Year: 2019

description: The four serotypes of dengue virus (DENV-1–4) are viruses of global concern. Although it is a key step in the lifecycle of these viruses, the host-mediated proteolytic maturation of the structural membrane precursor (prM) glycoprotein is an enigmatic molecular event. Maturation of prM is required for DENV infectivity. This proteolysis is thought to be mediated by human furin, a member of the proprotein convertase family of endoproteases that cleaves a wide variety of host cell molecules and is often hijacked by infectious agents to facilitate their lifecycle. DENV prM maturation is enigmatic for three reasons. First, a cleavage sequence that would be poorly processed by furin has been selected in all four serotypes, resulting in a large proportion of uncleaved immature prM on nascent virus particles. Second, it is unknown whether furin is the sole host enzyme responsible for cleaving prM. Third, while this event has been studied in the context of DENV-2, it is unknown whether the other three serotypes behave similarly with regard to prM maturation rate and its dependence on host furin. Research into these biological questions has been hindered by a lack of molecular tools to accurately quantify DENV-1–4 prM maturation. Here, we developed a novel adaptation of multiple reaction monitoring mass spectrometry (MRM-MS) that uses N-terminal acetyl (NTAc) labelling to differentially quantify cleaved M and uncleaved prM. We applied our NTAc-MRM methodology to determine the relative maturation rate of DENV-1–4 derived from cultured human cells and found significant differences among the serotypes. We also found that prM maturation of DENV-1 does not require active furin. Finally, we applied NTAc-MRM to quantify DENV-1–4 prM maturation in the presence of an adenovirus-expressed serine protease inhibitor (serpin), Spn4A, which stoichiometrically inhibits furin-like proteases. We found that the ER-retained form of Spn4A inhibited DENV-1–4 prM maturation, but a constitutively secreted form of Spn4A produced a robust inhibition of the DENV lifecycle, including intracellular vRNA synthesis, which cannot be explained solely in terms of prM maturation. We therefore hypothesize that host cellular targets of furin-like proteases play an important part in the DENV lifecycle.
Light Curve Solutions of Eclipsing Binaries in SMC
Creators: name: Ivanov, Valentin P.
name: Kjurkchieva, Diana P.
name: Rao, M. Srinivasa
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We propose a procedure for light-curve solution of eclipsing binary stars in the Small Magellanic Cloud for which photometric data have been obtained in the framework of the OGLE project as well as way of determination of the global stellar parameters on the basis of the obtained solutions, some empirical relations as well as the distance to the SMC. Several examples illustrate this procedure.
description: 10 pages, 2 figures, accepted
Semiclassical construction of random wave functions for confined systems
Creators: name: Urbina, Juan Diego
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: 530 Physik
subject: 05.45.Mt
subject: 03.65.Sq

description: We develop a statistical description of chaotic wave functions in closed systems obeying arbitrary boundary conditions by combining a semiclassical expression for the spatial two-point correlation function with a treatment of eigenfunctions as Gaussian random fields. Thereby we generalize Berry’s isotropic random wave model by incorporating confinement effects through classical paths reflected at the boundaries. Our approach allows one to explicitly calculate highly nontrivial statistics, such as intensity distributions, in terms of usually few short orbits, depending on the energy window considered. We compare with numerical quantum results for the Africa billiard and derive nonisotropic random wave models for other prominent confinement geometries.
Entropy-Corrected New Agegraphic Dark Energy Model in Horava-Lifshitz Gravity
Creators: name: Khatua, Piyali Bagchi
name: Chakraborty, Shuvendu
name: Debnath, Ujjal
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: In this work, we have considered the entropy-corrected new agegraphic dark energy (ECNADE) model in Horava-Lifshitz gravity in FRW universe. We have discussed the correspondence between ECNADE and other dark energy models such as DBI-essence,Yang-Mills dark energy, Chameleon field, Non-linear electrodynamics field and hessence dark energy in the context of Horava-Lifshitz gravity and reconstructed the potentials and the dynamics of the scalar field theory which describe the ECNADE.
description: 12 pages
Theory for the cyclotron resonance of holes in strained asymmetric Ge-SiGe quantum wells
Creators: name: Winkler, R.
name: Merkler, M.
name: Darnhofer, T.
name: Rössler, Ulrich
Publisher: name: Universität Regensburg
Year: 1996
Subjects: subject: 530 Physik

description: We present calculations of hole Landau levels, cyclotron masses, and far-infrared spectra for strained asymmetric p-type Ge-Si$_{x}$Ge$_{1-x}$ quantum wells in a perpendicular magnetic field in order to interpret recent experimental results by Engelhardt et al. [Solid State Electron. 37, 949 (1994)]. Self-consistent hole subband calculations are combined with calculations of the Landau levels using a 6 x 6 {\bf k·p} Hamiltonian for the topmost $\Gamma$$_{8}$ and $\Gamma$$_{7}$ bulk valence bands. Our results are in very good agreement with the experimental data. Taking into account the coupling to the split-off band turns out to be important. The complex spectra of hole Landau levels in strained quantum wells remind one of the well known quantum resonance spectra of bulk {\it p}-type Ge under uniaxial stress.
Производственные процессы землеройных машин на карьерах
Creators: name: Обитов Насриддин Мехриевич
Publisher: name: Достижения науки и образования
Year: 2019
Subjects: производственные процессы
землеройная машина
приспособленность
адаптация
разработка грунтов
рабочий орган
условия работы

description: В статье рассмотрены условия работы землеройных машин, основными из которых являются приспособленность, адаптация, разработка грунтов, условия работы, природно-климатические и грунтовые. При этом в различных условиях потенциал машин используется не эффективно, т.е. они не догружены по подаваемой энергии в рабочем процессе взаимодействия системы «рабочий орган грунт» или перегружены. На этой основе определено, что есть возможность повышения их эффективности за счет адаптации машин к определенным условиям эксплуатации.
Scaled-Energy Spectroscopy and Its Relation with Periodic Orbits
Creators: name: Eichmann, U.
name: Richter, Klaus
name: Wintgen, Dieter
name: Sandner, W.
Publisher: name: Universität Regensburg
Year: 1988
Subjects: subject: 530 Physik
subject: 32.60.+i
subject: 03.65.Fd
subject: 32.30.Jc

description: We show that the use of scaled variables in data recording leads to a simple but powerful parametrization of complicated spectra. In the case of the atomic Stark effect the parametrization is complete for all experimentally resolved states and emphasizes the similarities between different atoms, e.g., sodium and hydrogen. Theoretically, the parametrization is linked, in a natural way, to the classical periodic orbits of the system. We found excellent agreement between measurements, calculated quantum spectra, and classical calculations.
A Multi-Phase Suzaku Study of X-rays from tau Sco
Creators: name: Ignace, R.
name: Oskinova, L. M.
name: Jardine, M.
name: Cassinelli, J. P.
name: Cohen, D. H.
name: Donati, J. -F.
name: Townsend, R.
name: ud-Doula, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We obtained relatively high signal-to-noise X-ray spectral data of the early massive star tau Sco (B0.2V) with the Suzaku XIS instrument. This source displays several unusual features that motivated our study: (a) redshifted absorption in UV P Cygni lines to approximately +250 km/s suggestive of infalling gas, (b) unusually hard X-ray emission requiring hot plasma at temperatures in excess of 10 MK whereas most massive stars show relatively soft X-rays at a few MK, and (c) a complex photospheric magnetic field of open and closed field lines. In an attempt to understand the hard component better, X-ray data were obtained at six roughly equally spaced phases within the same epoch of tau Sco's 41 day rotation period. The XIS instrument has three operable detectors: XIS1 is back illuminated with sensitivity down to 0.2 keV; XIS0 and XIS2 are front illuminated with sensivitity only down to 0.4 keV and have overall less effective area than XIS1. The XIS0 and XIS3 detectors show relatively little variability. In contrast, there is a 4sigma detection of a 4% drop in the count rate of the XIS1 detector at one rotational phase. In addition, all three detectors show a 3% increase in count rate at the same phase. The most optimistic prediction of X-ray variability allows for a 40% change in the count rate, particularly near phases where we have pointings. Observed modulations in the X-ray light curve on the rotation cycle is an order of magnitude smaller than this, which places new stringent constraints on future modeling of this interesting magnetic massive star.
description: to appear in ApJ
Negative magnetoresistance in antidot lattices with saddle points
Creators: name: Hennig, Ralf
name: Rotter, Peter
name: Suhrke, Michael
name: Rössler, Ulrich
Publisher: name: Universität Regensburg
Year: 1998
Subjects: subject: Antidot arrays; Negative magnetoresistance
subject: 530 Physik

description: We have performed quantum-mechanical as well as classical magnetotransport calculations for a lattice of antidots with additional barriers. Both approaches reproduce the experimentally observed well-known commensurability peaks simultaneously with a negative differential magnetoresistance. By comparing both calculations, we find that quantum interference leads to an enhancement of the latter effect because of the increased probability of closed paths due to the insertion of additional potential barriers. We analyze the influence of the strength of inelastic scattering as well as increasing temperatures, i.e. energy averaging, in order to separate the classical and the quantum contributions.
R code
Creators: name: Higgins, Steven
Publisher: name: figshare
Year: 2022
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: 60704 Plant Pathology

description: R code used to reproduce figures related to the manuscript, Direct DNA sequencing of 'Candidatus Liberibacter asiaticus' from Diaphorina citri, the Asian citrus psyllid, and its implications for citrus greening disease management.
Key to world security: an address on international peace. By Archbishop Downey.
Creators: name: Downey, Richard
Publisher: name: University of Notre Dame
Year: 2023

description:
 Includes The laborer and his hire, by E.J. Coyne, and Why Maternity Guilds? by Dorothy Weston.
 Reprinted from the Catholic mind, v. 33, no. 16, August 22, 1935.
Малоинвазивные технологии в лечении больных с острым деструктивным холециститом
Creators: name: Назаров Зокир Норйигитович
name: Юсупалиева Дилнора Баходир Кизи
name: Тилавова Юлдуз Мухаммадшукур Кизи
Publisher: name: Достижения науки и образования
Year: 2019
Subjects: острый холецистит
холецистэктомия
мини-доступ
конверсия
отдаленные результаты

description: Нами проведен анализ у 4037 пациентов, оперированных в клинике СамМИ за период 2008-2018 годов. Конверсия минидоступа в традиционное пособие потребовалась в 2,08%. Проведенное исследование непосредственных и отдаленных результатов холецистэктомии в зависимости от способа операции показало, что: переход от методики традиционной холецистэктомии к малоинвазивным технологиям, особенно операции из минидоступа, позволил существенно снизить частоту осложнений; течение раннего послеоперационного периода при выполнении операции с применением малоинвазивных методик характеризуется малой выраженностью болевого синдрома, позволяет отказаться от применения наркотических анальгетиков и активизировать больного с первых послеоперационных суток.
On the observability of the acoustic plasma mode in double-layered quantum dots
Creators: name: Mayrock, O.
name: Mikhailov, S.
name: Steffens, Oliver
name: Rössler, Ulrich
Publisher: name: Universität Regensburg
Year: 1998
Subjects: subject: Quantum dots; Collective excitations; Magneto-plasmon; Acoustic modes
subject: 530 Physik

description: Double-layered quantum dots represent a novel realization of a multi-component plasma system. By modelling the system and applying classical concepts we investigate the oscillator strength of the acoustic plasma mode and its dependence on the system parameters. In view of recent experimental results, we discuss the observability of this collective excitation.
From Landau levels to universal fluctuations - level statistics of lateral superlattices
Creators: name: Steffens, Oliver
name: Rotter, Peter
name: Suhrke, Michael
Publisher: name: Universität Regensburg
Year: 1997
Subjects: subject: 530 Physik

description: We study the energy-level statistics for electrons in a lateral two-dimensional superlattice in dependence on the strength of the modulation potential at a given perpendicular magnetic field. The interminiband statistics at some selected point in the magnetic Brillouin zone shows a transition from degenerate Landau levels to universal spectral correlations while the corresponding classical dynamics displays a crossover from regular cyclotron orbits to chaotic motion. In terms of the nearest-neighbor spacing distribution, we observe the occurrence of level repulsion for all nonzero modulation amplitudes, which indicates a discontinuous transition to universal fluctuations for the smallest level spacings when the rotational invariance of the system is broken by a finite superlattice potential. In order to test the universality of the transition on larger scales, we propose a random matrix model with one transition parameter for comparison. Confirmed by two different types of potential shapes, we detect an explicit influence of the potential shape on the level spacing distributions, which hence cannot be described by the one-parameter model. Using the spectral rigidity, however, universal long-range fluctuations in the regime of negligible Landau-level mixing are found, in agreement with our random matrix model.
Astrophysical S-Factor of p2H Radiative Capture
Creators: name: Dubovichenko, S. B.
name: Dzhazairov-Kakhramanov, A. V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The astrophysical S-factor of p2H radiative capture in the energy range down to 1 keV is considered in the potential cluster model with the classification of orbital states according to Young's scheme symmetry. It is shown that the approach used, which takes into account E1 transition only, gives a good description of the new experimental data for two potentials of the bound state of 3He nucleus and leads to the value S=1.35(5) \cdot 10-4 keVb and 1.65(5)\cdot 10-4 keVb.
description: 8 page, 2 fig
High-throughput data analysis in behavior genetics
Creators: name: Sakov, Anat
name: Golani, Ilan
name: Lipkind, Dina
name: Benjamini, Yoav
Publisher: name: arXiv
Year: 2010
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: In recent years, a growing need has arisen in different fields for the development of computational systems for automated analysis of large amounts of data (high-throughput). Dealing with nonstandard noise structure and outliers, that could have been detected and corrected in manual analysis, must now be built into the system with the aid of robust methods. We discuss such problems and present insights and solutions in the context of behavior genetics, where data consists of a time series of locations of a mouse in a circular arena. In order to estimate the location, velocity and acceleration of the mouse, and identify stops, we use a nonstandard mix of robust and resistant methods: LOWESS and repeated running median. In addition, we argue that protection against small deviations from experimental protocols can be handled automatically using statistical methods. In our case, it is of biological interest to measure a rodent's distance from the arena's wall, but this measure is corrupted if the arena is not a perfect circle, as required in the protocol. The problem is addressed by estimating robustly the actual boundary of the arena and its center using a nonparametric regression quantile of the behavioral data, with the aid of a fast algorithm developed for that purpose.
description: Published in at http://dx.doi.org/10.1214/09-AOAS304 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
The study of molecular interactions with capillary electrophoresis frontal analysis
Creators: name: Qian, Cheng
Publisher: name: University of British Columbia
Year: 2018

description: Binding analysis has been a very important topic of many scientific research works for years. In Chapter 1, some most common binding analysis techniques were briefly reviewed. Six interesting variants of the CE-based methods are discussed including capillary electrophoresis frontal analysis (CE-FA). In Chapter 2, we demonstrated the development of a CE-FA method and its application in the affinity determination between a DNA binding domain and a drug candidate. The current data processing method of CE-FA mandates specific requirement on the mobilities of the binding pair in order to obtain accurate binding constants. Chapter 3 showed how significant errors occur when the mobilities of the interacting species do not meet these requirements. Therefore, the applicability of CE-FA in many real world applications becomes questionable. A mobility-based correction method was developed based on the flux of the ligand molecules. Conventionally, adding external pressure during the process of capillary electrophoresis separation has not been a common approach. While accelerating the separation, drawbacks including peak broadening and reduced resolving power are almost inevitable in pressure-assisted capillary electrophoresis (PACE). Frontal analysis (FA), with its unique characteristics, could potentially benefit from using external pressure while avoiding related drawbacks. In Chapter 4, the possible impact from pressure was studied mathematically and the physical process was simulated with COMSOL Multiphysics®. PACE-FA is applied to study the binding interactions between hydroxypropyl β-cyclodextrin (HP-β-CD) and small ligand molecules. In Chapter 5, we compared the binding constants obtained with electrospray ionization mass spectrometry (ESI-MS) and ACE. Two simulation programs were deployed to estimate the solvent impact on the binding interactions. In Chapter 6, a free solution method was developed for evaluating specific binding affinity and stoichiometry of small molecules with oligo DNA subsequent to cation-induced G quadruplex formation. A nonlinear curve fitting equation capable of extracting specific binding constants in the presence of non-specific binding without the need of reference compounds was proposed and tested. ESI-MS was first used to rapidly screen the small molecule candidates, then the stoichiometry and affinity constants of the native state binding pair in solution were obtained with capillary electrophoresis frontal analysis (CE-FA).
Manifestation of commensurate orbits in the magnetoluminescence spectrum of electrons in antidot arrays
Creators: name: Kukushkin, I.
name: Weiss, Dieter
name: Lütjering, Gerd
name: Bergmann, Raymond
name: Klitzing, Klaus von
name: Eberl, Karl
name: Rotter, Peter
name: Suhrke, Michael
name: Rössler, Ulrich
Publisher: name: Universität Regensburg
Year: 1997
Subjects: subject: 530 Physik

description: We present a magneto-optical study of the energy spectrum of two-dimensional electrons subjected to a perpendicular magnetic field in the presence of a square lattice of antidots. Oscillations of the luminescence intensity, measured at the Fermi energy, reproduce structure observed previously in transport experiments ascribed to commensurate cyclotron orbits that fit around a specific number of antidots. We demonstrate that commensurability features in the luminescence intensity can be observed below the Fermi energy, leading to a quadratic dependence of their spectral positions on the applied magnetic field. The possible origin of this novel effect will be discussed by comparing it with model calculations.
A System for Cancellation of Two-Level System Noise in Kinetic Inductance Devices
Creators: name: Meiburg, Alexander
Publisher: name: California Institute of Technology
Year: 2018
Subjects: Physics
two-level system
photometry
tls
kid
mkid
microwave kinetic inductance device
kinetic inductance device

description: Kinetic Inductance Detectors (KIDs) are showing promise in a variety of low-light applications photometry applications, notably in observing B-mode polarization of the cosmic microwave background. These devices are read out by modulating the inductance of an LC resonator through light, and observing the shift in resonant frequency. Among several contributing sources of noise is Two-Level System noise (TLS noise) that causes low-loss drift in the frequency. Under certain assumptions of the source of the noise, we propose a new dual-resonator design that would allow the TLS noise to be observed independently of the signal, and thus cancelled out. This design comes at a roughly factor-of-2 cost in component size and sensitivity. We designed a manufactured a niobium-on-silicon chip, but encountered issues in that we were unable to observe enough TLS noise to conclusively say that the cancellation works.
Une remarque sur les courbes de Reichardt-Lind et de Schinzel
Creators: name: Wittenberg, Olivier
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We prove that the arithmetic fundamental group of X admits no section over the absolute Galois group of Q when X is the Schinzel curve, thereby confirming in this example the prediction given by Grothendieck's section conjecture. ----- Nous démontrons que le groupe fondamental arithmétique de X n'admet pas de section au-dessus du groupe de Galois absolu de Q lorsque X est la courbe de Schinzel, confirmant ainsi sur cet exemple la prédiction donnée par la conjecture des sections de Grothendieck.
description: 8 pages
Quantum chaos and magnetotransport in lateral superlattices: he transition from weak to strong modulation potential
Creators: name: Suhrke, Michael
name: Steffens, Oliver
name: Rotter, Peter
name: Rössler, Ulrich
Publisher: name: Universität Regensburg
Year: 1998
Subjects: subject: Lateral superlattices; Quantum chaos; Level statistics; Magnetotransport; Commensurability oscillations
subject: 530 Physik

description: Magnetotransport in lateral superlattices covers a variety of apparently different physics dependent on the amplitude of the modulation potential relative to the Fermi energy ranging from the weakly modulated 2DEG to the antidot lattice. Here we investigate the transition between weak modulation and antidots within the quantum-mechanical theory by studying (i) the single-particle spectrum with respect to quantum signatures of classical chaos and (ii) the change of characteristic features in the magnetoresistance starting from the Kubo formula.
Magnetoexcitons and Landau levels in strained ZnTe and ZnSe layers.
Creators: name: Lee, S.
name: Michl, F.
name: Rössler, Ulrich
name: Dobrowolska, M.
name: Furdyna, J.
Publisher: name: Universität Regensburg
Year: 1998
Subjects: subject: II–VI Semiconductors; Magnetoabsorption; Magnetoexcitons; Magneto-polaron coupling; Landau levels
subject: 530 Physik

description: Interband absorption in ultra-thin strained MBE-grown epilayers of ZnTe and ZnSe has been measured in magnetic fields up to 6 T. The spectra simultaneously uncover two effects of the magnetic field: diamagnetic shifts of exciton states, and the rich oscillatory structure arising from formation of Landau levels in the continuum. The observed spectral features are analyzed using the 8 × 8 k·p model, which takes into account the residual strain introduced during sample preparation. From this analysis we extract values for both the energy gaps and the exciton binding energies with high accuracy. Effects of electron—hole correlation and resonant magneto-polaron coupling in the continuum absorption are also discussed.
From the two-dimensional electron gas to antidot superlattices: Magnetoresistance effects in the transition regime
Creators: name: Steffens, Oliver
name: Schlösser, T.
name: Rotter, Peter
name: Ensslin, K.
name: Suhrke, Michael
name: Kotthaus, J.
name: Rössler, Ulrich
name: Holland, M.
Publisher: name: Universität Regensburg
Year: 1998
Subjects: subject: 530 Physik

description: Magnetoresistance measurements and theoretical calculations for two-dimensional electron systems under a perpendicular magnetic field are presented which illuminate transport effects due to a periodic electrostatic potential modulation. We focus on features arising from the resolution of the magnetic miniband structure which are beyond the perturbative regime governed by the dispersion of Landau bands. Our non-perturbative quantum-mechanical calculations reveal that the dispersion of individual minibands is responsible for the complicated behaviour of the magnetoresistance in the regime of intermediate modulation strength. In particular, the interplay between miniband and scattering contributions to the conductivity leads to an almost structureless magnetoresistance in this regime followed by the formation of antidot peaks due to the miniband conductivity.