cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Extracting vibrational anharmonicities from short driven molecular dynamics trajectories
Creators: name: Parneix, Pascal
name: Maupin, Romain
name: Attal, Loïse
name: Calvo, Florent
name: Falvo, Cyril
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Anharmonicities provide a wealth of information about the vibrational dynamics, mode coupling and energy transfer within a polyatomic system. In this contribution we show how driven molecular dynamics trajectories can be used to extract anharmonicity properties under very short times of a few hundreds of vibrational periods, using two exciting fields at- and slightly off-resonance. Detailed analyses on generic quartic potential energy surfaces and applications to various model systems are presented, giving good agreement with perturbation theory. Application to a realistic molecule, cubane (C$_8$H$_8$), modeled with a tight-binding quantum force field, further indicates how the method can be applied in practical cases.
description: Published in Theoretical Chemistry Accounts. 17 pages, 5 figures, 2 tables
Phase-locked generation and field-resolved detection of widely tunable terahertz pulses with amplitudes exceeding 100 MV/cm
Creators: name: Sell, A.
name: Leitenstorfer, A.
name: Huber, Rupert
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik

description: Phase-locked terahertz transients with peak electric fields of 108 MV/cm and center frequencies continuously tunable from 10 to 72 THz are generated via difference-frequency mixing of two parametrically amplified pulse trains from a single white-light seed. Free space electro-optic sampling with 8 fs gating pulses from a two-branch Er:fiber laser allows us to monitor all transients directly in the time domain. We identify extreme terahertz nonlinearities in the detector crystal with subcycle resolution.
description: » This publication has been selected for the Virtual Journal of Ultrafast Science
Form and function in hummingbird flight
Creators: name: Skandalis, Dimitri Ariel
Publisher: name: University of British Columbia
Year: 2017

description: The extent to which locomotor adaptations depend on evolution of morphological form or kinematic function remains an open question. Hummingbirds are a speciose group with exceptional aerial abilities across a large range of habitats, making them attractive models for biomechanical studies of coupled form and function. Here, I investigate the origin of hummingbird flight performance among and within species, and within individuals. I develop a novel biomechanical framework adapted from aerodynamic principles, and find that a weight-support strategy thus far only identified among hummingbird species is likely a response to selection for constant, mass-independent hovering and burst performance. Within species, hummingbirds exhibit an alternative weight-support strategy that instead results in reduced flight performance in larger individuals. I next develop experimental and analytical techniques to investigate the time- and behaviour-dependence of wing morphology and kinematics. Within individuals, flight performance depends on fine adjustments to wing kinematics and wing morphology, including wing twisting and cambering. I suggest that individual hummingbirds dynamically control their wing morphology to minimise the cost of flight rather than maximise force production, but can sacrifice flight efficiency to enable challenging flight behaviours. Wing morphing therefore offers flight control degrees of freedom that can be called upon as required. Taken together, I propose that evolution of wing form maximises average performance, but also maximises the scope for dynamic wing control.
Ultrabroadband 50-130 THz pulses generated via phase-matched difference frequency mixing in LiIO₃
Creators: name: Zentgraf, T.
name: Huber, Rupert
name: Nielsen, N. C.
name: Chemla, D. S.
name: Kaindl, R.
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: 530 Physik

description: We report the generation of ultrabroadband pulses spanning the 50-130 THz frequency range via phase-matched difference frequency mixing within the broad spectrum of sub-10 fs pulses in LiIO3. Model calculations reproduce the octave-spanning spectra and predict few-cycle THz pulse durations less than 20 fs. The broad applicability of this scheme is demonstrated with 9-fs pulses from a Ti:sapphire oscillator and with 7-fs amplified pulses from a hollow fiber compressor as pump sources.
description: » This publication has been selected for the Virtual Journal of Ultrafast Science
Stimulated THz Emission from Internal Exciton Transitions in Cu2O
Creators: name: Huber, Rupert
name: Schmid, B. A.
name: Shen, Y.-R.
name: Chemla, D. S.
name: Kaindl, R. A.
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: 530 Physik
subject: 78.45.+h
subject: 42.65.−k
subject: 71.35.−y
subject: 78.47.+p

description: We report the first observation of stimulated emission of terahertz radiation from internal transitions of excitons. The far-infrared electromagnetic response of Cu2O is monitored via broadband terahertz pulses after ultrafast resonant excitation of three-dimensional 3p excitons. Stimulated emission from the 3p to the energetically lower 2s bound level occurs at a photon energy of 6.6 meV, with a cross section of ∼10-14 cm2. Simultaneous excitation of both exciton levels, in turn, drives quantum beats, which lead to efficient terahertz emission sharply peaked at the difference frequency.
description: » This publication has been selected for the Virtual Journal of Ultrafast Science
Coherent Structural Dynamics and Electronic Correlations during an Ultrafast Insulator-to-Metal Phase Transition in VO2
Creators: name: Kübler, C.
name: Ehrke, H.
name: Huber, Rupert
name: Lopez, R.
name: Halabica, A.
name: Haglund Jr., R. F.
name: Leitenstorfer, A.
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: 530 Physik
subject: 71.30.+h
subject: 72.80.Ga
subject: 78.47.+p

description: We directly trace the multi-THz conductivity of VO2 during an insulator-metal transition triggered by a 12-fs light pulse. The femtosecond dynamics of lattice and electronic degrees of freedom are spectrally discriminated. A coherent wave packet motion of V-V dimers at 6 THz modulates the lattice polarizability for approximately 1 ps. In contrast, the electronic conductivity settles to a constant value already after one V-V oscillation cycle. Based on our findings, we propose a qualitative model for the nonthermal phase transition.
description: » This publication has been selected for the Virtual Journal of Ultrafast Science » This publication has been selected for the Virtual Journal of Nanoscale Science and Technology
8-fs pulses from a compact Er:fiber system: quantitative modeling and experimental implementation
Creators: name: Sell, A.
name: Krauss, G.
name: Scheu, R.
name: Huber, Rupert
name: Leitenstorfer, A.
Publisher: name: Universität Regensburg
Year: 2009
Subjects: subject: 530 Physik

description: We demonstrate an all-fiber turnkey source of extremely stable 2-cycle pulses at a center wavelength of 1.17 µm. Taylor-cut highly nonlinear germano-silica bulk fibers (HNFs) provide smooth supercontinua with a bandwidth of 560 nm and a spectral shape precisely controlled by the dispersion of the fiber and the phase of the 1.55 µm pump pulses. Alternatively these fibers are capable of generating pulses with central wavelengths continuously tunable from 0.9 µm up to 1.4 µm. These results are based on parameter-free simulations of nonlinear pulse propagation including higher-order dispersion as well as instantaneous Kerr and retarded Raman contributions.
Femtosecond THz studies of intra-excitonic transitions
Creators: name: Huber, Rupert
name: Schmid, B. A.
name: Kaindl, R. A.
name: Chemla, D. S.
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik
subject: 71.35.–y
subject: 78.47.+p
subject: 78.67.De

description: Few-cycle THz pulses are employed to resonantly access the internal fine structure of photogenerated excitons in semiconductors, on the femtosecond time scale. This technique allows us to gain novel insight into many-body effects of excitons and reveal key quantum optical processes. We discuss experiments that monitor the density-dependent renormalization of the binding energy of a high-density exciton gas in GaAs/Al0.3Ga0.7As quantum wells close to the Mott transition. In a dilute ensemble of 3p excitons in Cu2O, stimulated THz emission from internal transitions to the energetically lower 2s state is observed at a photon energy of 6.6 meV, with a cross section of 10–14 cm2. Simultaneous interband excitation of both exciton levels drives quantum beats, which cause efficient THz emission at the difference frequency. By extending this principle to various other exciton resonances, we develop a novel way of mapping the fine structure by twodimensional THz emission spectroscopy.
Magnetic relaxation of 3He-B after a large tipping pulse
Creators: name: Eska, G.
name: Neumaier, K.
name: Schoepe, Wilfried
name: Uhlig, K.
name: Wiedemann, W.
Publisher: name: Universität Regensburg
Year: 1982
Subjects: subject: 530 Physik

description: A time dependent precession frequency is observed in 3He-B after a large tipping pulse (>104°) in transverse NMR. Relating the frequency to the tipping angle reveals the time dependence of the longitudinal magnetization. A fit of Fomin's theory to the data yields the Leggett-Takagi collision time at various temperatures.
Evidence for a superfluid-induced surface barrier for electrons in liquid helium
Creators: name: Schoepe, Wilfried
name: Probst, C.
Publisher: name: Universität Regensburg
Year: 1970
Subjects: subject: 530 Physik

description: The free surface of liquid helium acts as an energy barrier on electron currents across the surface into the vapor, if the liquid is superfluid. In zero electric field, the barrier vanishes at Tλ. The measurements were performed in pure 4He in 4He.
ปัจจัยเชิงสาเหตุที่มีผลต่อพฤติกรรมการใช้งานเว็บไซต์ RTAF.LIVE ในการรับข้อมูลข่าวสารของข้าราชการกองทัพอากาศไทย
Creators: name: รัฐธินี  สุทธิผลไพบูลย์
Publisher: name: สำนักหอสมุด มหาวิทยาลัยรังสิต
Year: 2564
Subjects: ความคาดหวังในประสิทธิภาพ
ความคาดหวังในการใช้งาน
อิทธิพลทางสังคม
สภาพสิ่งอำนวยความสะดวกในการใช้งาน
ความตั้งใจในการใช้งาน

description: วารสารรังสิตสารสนเทศ, 27, 2, 6-25
Effect of substrate-temperature on the microstructure of thin niobium films
Creators: name: Surgers, C.
name: Strunk, Christoph
name: Löhneysen, H.
Publisher: name: Universität Regensburg
Year: 1994
Subjects: subject: X-RAY-DIFFRACTION; NB FILMS; EPITAXIAL-GROWTH; REFLECTION; SURFACES
subject: 530 Physik

description: Niobium films with constant thickness have been deposited on sapphire (11 $($) over bar$$ 20) by electron-beam evaporation at different substrate; temperatures (150 degrees C less than or equal to T-S less than or equal to 750 degrees C). The samples were characterized by X-ray diffraction and resistivity measurements. X-ray reflectivity shows that all films are covered with an oxide layer of about 20 Angstrom in ambient atmosphere. The (110) texture at high T-S decreases towards lower T-S, accompanied by an increasing surface roughness. Below T-S = 350 degrees C the grain size in the growth direction becomes smaller than the film thickness and a relaxation of intrinsic stress is observed. A transition from a columnar growth structure to a fine grained microstructure is inferred. The change of the microstructure with T-S is probably due to the temperature dependent grain boundary mobility during the deposition process.
Determination of the X-ray reflection emissivity profile of 1H 0707-495
Creators: name: Wilkins, D. R.
name: Fabian, A. C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: When considering the X-ray spectrum resulting from the reflection off the surface of accretion discs of AGN, it is necessary to account for the variation in reflected flux over the disc, i.e. the emissivity profile. This will depend on factors including the location and geometry of the X-ray source and the disc characteristics. We directly obtain the emissivity profile of the disc from the observed spectrum by considering the reflection component as the sum of contributions from successive radii in the disc and fitting to find the relative weightings of these components in a relativistically-broadened emission line. This method has successfully recovered known emissivity profiles from synthetic spectra and is applied to XMM-Newton spectra of the Narrow Line Seyfert 1 galaxy 1H 0707-495. The data imply a twice-broken power law form of the emissivity law with a steep profile in the inner regions of the disc (index 7.8) and then a flat region between 5.6rg and 34.8rg before tending to a constant index of 3.3 over the outer regions of the disc. The form of the observed emissivity profile is consistent with theoretical predictions, thus reinforcing the reflection interpretation.
description: 9 pages, 10 figures. Accepted for publication in MNRAS
การดำเนินงานด้านกลยุทธ์ที่นำมาใช้กับสื่อสังคมออนไลน์ในห้องสมุดสถาบันอุดมศึกษาของรัฐ
Creators: name: รัตติยากร สาลีผลิน
Publisher: name: สำนักหอสมุด มหาวิทยาลัยรังสิต
Year: 2564
Subjects: กลยุทธ์สื่อสังคมออนไลน์
สื่อสังคมออนไลน์
ห้องสมุดสถาบันอุดมศึกษา

description: วารสารรังสิตสารสนเทศ, 27, 2, 26-47
Supplementary Material from Public awareness of and opinions on the use of mathematical transmission modelling to inform public health policy in the United Kingdom
Creators: name: McCabe, Ruth
name: Donnelly, Christl A.
Publisher: name: The Royal Society
Year: 2023
Subjects: classificationCode: 490102
subject: Biological mathematics

description: PDF document containing further information on methods and many additional results not presented in the main text.
Magnetoresistance of iodine-doped polyacetylene at low temperatures
Creators: name: Ettlinger, E.
name: Schoepe, Wilfried
name: Monkenbusch, M.
name: Wieners, G.
Publisher: name: Universität Regensburg
Year: 1984
Subjects: subject: 530 Physik

description: We have measured the magnetoresistance of metallic polyacetylene at temperatures T between 4.2 K and 0.3 K and in fields B up to 3.4 Tesla both parallel and perpendicular to the average current flow. We found an exclusively positive magnetoresistance scaling in low fields as B2/T2 for T < 1 K and as B2/T3 for T > 2 K. At high doping levels the magnetoresistance is small and saturates in high fields at low temperatures. These results are independent of the particular geometry used and will be discussed in terms of the magnetic field effect on the hopping conductivity.
Doctoral thesis recital (viola)
Creators: name: Balboa, Ruben
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Sonatas (Viola and piano)
Viola and piano music

description: Sonata for viola da gamba in G major, BWV 1027 / J.S. Bach -- Sonata for viola and piano in F major, op. 11 no. 4 / Paul Hindemith -- Pièces en form de habanera / Maurice Ravel -- Sonata for viola and piano / Arnold Bax.
Doctoral thesis recital (conducting) lecture
Creators: name: Galus, Tiffany
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Concertos (Saxophone with wind ensemble)
Instrumentation and orchestration (Band)

description: [Lecture]. John Adams' Saxophone concerto : a transcription for saxophone soloist and wind ensemble. Includes audio from the Jan. 19, 2019 performance video of the work by the University of Texas Wind Ensemble.
Multi-axis ESPI interferometer for 3-D displacement measurements
Creators: name: Zanini Broetto, Filipe
Publisher: name: University of British Columbia
Year: 2017

description: Small displacement measurements have several applications in engineering. Deformations ranging from nanometric scale to micrometric scale are very often related to mechanical stresses, materials phase transformations, residual stresses, biological processes, etc. It is common that these deformations occur in three dimensions and are not easily measured with simple equipment. Electronic speckle pattern interferometry (ESPI) systems use interference of light and laser properties to measure such small displacements in a very reliable way. The ESPI technique is a full-field non-contact technique capable of 3D measurements but the arrangement can get very complicated when it comes to number of components, size, cost, assembly complexity and operation. Among the many factors contributing for the complexity, the most important ones are the number of light beams and optical elements, and the laser itself. High quality lasers offer very high coherence – which is a measure of purity of spectrum and therefore allow for very high quality measurements with very low noise – at a very high cost, and usually are bulky, requiring many extra components to split light beams and direct the light to the region of interest. The aim of this project is to use special components to eliminate the need for an expensive laser and simplify the arrangement for a 3D ESPI measurement. The introduction of a dual diffraction grating system makes it possible to replace a high quality laser with a low coherence, compact and cheap laser diode. Moreover, with this new proposed arrangement it is possible to obtain the 3D ESPI information using two in-plane ESPI systems combined in one, reducing complexity and offering up to 6 different measurement possibilities. Based on the fact that only 3 different measurements are required for solving a complete 3D displacement field, the remaining measurements can be used for data averaging and to increase the accuracy and reduce uncertainties. The new design is presented and a portable device is developed. The arrangement is explored to test the robustness against exterior factors such as temperature and ambient light, and the accuracy of the measurement is verified with a controlled sample and finite element analysis/analytical solutions.
The Nazis in Mexico : Mexico and the Reich in the prewar period, 1936-1939
Creators: name: Winckler, Andreas Eberhard
Publisher: name: The University of Texas at Austin
Year: 1983
Subjects: subject: Germany--Foreign relations--Mexico
subject: Mexico--Foreign relations--Germany
subject: Mexico--Politics and government--1910-1946

description: There are three main reasons for undertaking a survey of the relations between Germany and Mexico on the eve of World War II. First, only one specific work exists on the topic, and it was published in Germany. All other publications, whether in Spanish, English, French or German deal very limitedly or indirectly with the relationship between the two countries in the prewar period. These secondary sources fail to describe and analyze properly the political and economic implications of both sides' foreign policy. The second reason is the geographical location of Mexico. It represents the Achilles' heel of the United States and thus the topic involves more than bilateral relations. Hence external political influences and trade agreements with Mexico naturally drew the interest of the United States. Its interference must be seen on two levels: first, the business interest, in particular by the oil companies before and after the expropriation in 1938; and secondly in the political realm of the Good Neighbor policy. Thus it is desirable to look at a complex set of foreign relations, especially in the triangle formed between Washington, Mexico City and Berlin. Finally, there was and is a good deal of rhetoric on the subject. While the German trade inroads in Latin America were at least rationalized by some critics in order to curb them, German political and ideological penetration by propaganda aroused uneasiness and more often fear. This psychological component was often treated emotional and irrational, and on both sides of the Rio Grande writers and political observers tended to express their anxieties about the 'Fifth Column' in exaggerated, sometimes even paranoid fashions. Of course, as we will see, these antagonists of National Socialism found evidence of German agitation in Mexico. They failed, however, to put this evidence in context of the political reality, meaning that the perceived German threat was harmless vis a vis its counter forces. For this reason, the thesis will attempt to show that the degree of German propaganda was clearly outweighed by the political success of the Cardenas administration and thus was doomed to insignificance. One might add that the Reich did not even perceive any intention to a 'spiritual conquest of Latin America' - as Franco imagined it after winning the Spanish Civil War. The only goal Germany might have aimed at, was a dissolution of the western hemisphere solidarity.
การพัฒนาและการวัดประสิทธิภาพระบบจัดการและค้นหาสินทรัพย์ด้วยคิวอาร์โค้ด
Creators: name: สุรัตน์ ศิริตันตราภรณ์
Publisher: name: สำนักหอสมุด มหาวิทยาลัยรังสิต
Year: 2564
Subjects: สินทรัพย์
ระบบจัดการสินทรัพย์
คิวอาร์โค้ด

description: วารสารรังสิตสารสนเทศ, 27, 2, 48-70
Women in Statius' Thebaid
Creators: name: Lupack, Susan M.
Publisher: name: The University of Texas at Austin
Year: 1993
Subjects: subject: Statius, P. Papinius (Publius Papinius). Thebais--Characters--Women
subject: Statius, P. Papinius (Publius Papinius)--Criticism and interpretation
subject: Women in literature

description: The women in Statius' Thebaid are striking characters. Statius gives them real roles to play; they don't just sit in the background of the epic waiting for the men to decide all the issues. Instead, they take active roles in the action and succeed in affecting the world around them. It is remarkable that Statius has his women make such a mark when you consider that the main concern of the Thebaid is the war between Argos and Thebes caused by the fraternal strife of Oedipus' sons. War and politics are realms traditionally associated with the actions of men. And yet, in the Thebaid, Statius has three major female characters, Argia, Antigone and Jocasta, who take an active role in directing events within those realms. Many other women throughout the epic also make their voices heard. Vergil also presents female characters who affect the political world. Dido is queen of Carthage in her own right and Amata is one of the main forces that starts the Italian war. But these two women stand out in the Aeneid precisely because they alone possess such power. In contrast, Argia, Antigone and Jocasta stand within a great nexus of influential women, both common and noble, whose voices are of central importance to the meaning of the epic. The question remains, how did Statius manage to incorporate his female characters into the world of war and politics without their presence seeming inappropriate to his readers? Was Statius working with certain societal mores that dictated the parameters within which his characters could act so that they wouldn't strain the belief of his readers, and if so, what were those parameters?
ความต้องการสารสนเทศขภาพด้านสุของผู้สูงอายุ สหพันธ์ชมรมผู้สูงอายุกรุงเทพมหานคร
Creators: name: นันทิยา ทับทิม
Publisher: name: สำนักหอสมุด มหาวิทยาลัยรังสิต
Year: 2564
Subjects: ความต้องการสารสนเทศด้านสุขภาพ
ผู้สูงอายุ
สหพันธ์ชมรมผู้สูงอายุกรุงเทพมหานคร

description: วารสารรังสิตสารสนเทศ, 27, 2, 71-93
Note on a bubble model for excess electrons in liquid hydrocarbons
Creators: name: Hammer, H.
name: Schoepe, Wilfried
name: Weber, D.
Publisher: name: Universität Regensburg
Year: 1976
Subjects: subject: 530 Physik
subject: 61.20.Lc
subject: 66.10.-x

description: It is shown that a simple bubble model for electrons in liquid hexane that has been suggested recently does not satisfy the necessary stability criteria if the macroscopic properties of liquid hexane are used. Stability can be achieved, however, by assuming a higher dielectric constant ϵ than the macroscopic value. For hexane and some other hydrocarbons we have varied ϵ until the stable bubble model yields the experimentally determined activation energies of the mobility. The resulting values of ϵ turn out to be nearly the same for all liquids investigated.
สถานการณ์ทางสังคมและจิตลักษณะที่มีอิทธิพลต่อพฤติกรรมการใช้แอปพลิเคชันและฟีเจอร์ต่างๆ ของสมาร์ตโฟนในเชิงสร้างสรรค์: กรณีศึกษานักเรียนระดับชั้นมัธยมศึกษาตอนต้นโรงเรียนทุ่งสงและโรงเรียนสตรีทุ่งสง
Creators: name: อังคณา ดุษณีนภดล
Publisher: name: สำนักหอสมุด มหาวิทยาลัยรังสิต
Year: 2564
Subjects: แอปพลิเคชันและฟีเจอร์ต่างๆ
พฤติกรรมการใช้สมาร์ตโฟนอย่างสร้างสรรค์

description: วารสารรังสิตสารสนเทศ, 27, 2, 94-116
Hole Localization in Molecular Crystals From Hybrid Density Functional Theory
Creators: name: Sai, Na
name: Barbara, Paul F.
name: Leung, Kevin
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We use first-principles computational methods to examine hole trapping in organic molecular crystals. We present a computational scheme based on the tuning of the fraction of exact exchange in hybrid density functional theory to eliminate the many-electron self-interaction error. With small organic molecules, we show that this scheme gives accurate descriptions of ionization and dimer dissociation. We demonstrate that the excess hole in perfect molecular crystals form self-trapped molecular polarons. The predicted absolute ionization potentials of both localized and delocalized holes are consistent with experimental values.
description: 5 pages, 3 figures
Articulatory function in glossectomized patients with immediate reconstruction using a free jejunum flap
Creators: name: Michiwaki, Y.
name: Schmelzeisen, R.
name: Hacki, Tamas
name: Michi, K.
Publisher: name: Universität Regensburg
Year: 1992
Subjects: subject: 610 Medizin
subject: Adult
subject: Aged
subject: Articulation Disorders/surgery
subject: Carcinoma, Squamous Cell/surgery
subject: Female
subject: Glossectomy/adverse effects
subject: Humans
subject: Jejunum
subject: Male
subject: Middle Aged
subject: Mouth Neoplasms/surgery
subject: Speech Articulation Tests
subject: Surgical Flaps
subject: Time Factors

description: Postoperative articulation in 18 glossectomized patients was investigated. The subjects were: 5 cases of tongue tumour, 7 cases of tumour of the anterior part of the floor of the mouth and 6 cases of tumour of the lateral part. A new modification of the Freiburger test for speech audiometry was used as test material. Then the articulatory function was assessed according to an overall score based on 180 monosyllables, the manner of production of 171 initial consonants and the place of production of 85 glossal sounds. The cases of tumour of the tongue and the lateral part of the floor of the mouth had excellent scores in all classes of sounds, which were compatible with the normative data. The subjects of tumour of the anterior part of the floor of the mouth had low overall scores, low scores for plosive and affricative sounds, and very low scores for sounds produced with the rear of the tongue. The relation between the site or amount of resection and subsequent articulation was significantly poor in all categories of sounds for the cases of anterior tumour, particularly in the movement of the posterior portion of the tongue even though it was not involved in the operation. In all groups there was a weak negative relation between the amount of resection and postoperative articulation. In reviewing the literature, reconstruction with a free jejunum flap was considered to lead to better articulation than reconstruction by other techniques. The need to assess postoperative function objectively was stressed, to compare the postoperative functions and to determine the indications for the reconstructive technique.
A regularization of the hamiltonian constraint compatible with the spinfoam dynamics
Creators: name: Alesci, Emanuele
name: Rovelli, Carlo
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We introduce a new regularization for Thiemann's Hamiltonian constraint. The resulting constraint can generate the 1-4 Pachner moves and is therefore more compatible with the dynamics defined by the spinfoam formalism. We calculate its matrix elements and observe the appearence of the 15j Wigner symbol in these.
description: 24 pages
Screening by symmetry of long-range hydrodynamic interactions of polymers confined in sheets
Creators: name: Tlusty, Tsvi
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Hydrodynamic forces may significantly affect the motion of polymers. In sheet-like cavities, such as the cell's cytoplasm and microfluidic channels, the hydrodynamic forces are long-range. It is therefore expected that that hydrodynamic interactions will dominate the motion of polymers in sheets and will be manifested by Zimm-like scaling. Quite the opposite, we note here that although the hydrodynamic forces are long-range their overall effect on the motion of polymers vanishes due to the symmetry of the two-dimensional flow. As a result, the predicted scaling of experimental observables such as the diffusion coefficient or the rotational diffusion time is Rouse-like, in accord with recent experiments. The effective screening validates the use of the non-interacting blobs picture for polymers confined in a sheet.
description: http://www.weizmann.ac.il/complex/tlusty/papers/Macromolecules2006.pdf http://pubs.acs.org/doi/abs/10.1021/ma060251d
Pair-breaking mechanisms in Nb/Gd/Nb films
Creators: name: Strunk, Christoph
name: Paschen, U.
name: Surgers, C.
name: Löhneysen, H. v.
Publisher: name: Universität Regensburg
Year: 1994
Subjects: subject: TEMPERATURES; MULTILAYERS
subject: 530 Physik

description: Several series of Nb/Gd/Nb triple layers have been grown in UHV by e--beam evaporation onto sapphire (1120BAR) substrates at 300 K. The superconducting transitions have been measured resistively and by dc-susceptibility, the ferromagnetic transition with the transverse magnetooptical Kerr effect. The Gd layers show long-range ferromagnetic order only above a layer thickness of 20 angstrom, which is attributed to the formation of a discontinuous film below this thickness. The superconducting properties of the films reflect this transition.by a sudden decrease in the T(c)(d(Gd))-curve with increasing d(Gd). This result indicates that pair breaking by the bulk-Gd exchange field is much more effective than pair breaking by spin-flip scattering. Depending on the thickness of the Nb layers T(c)(d(Gd)) saturates for large values of at a finite temperature or tends to zero.
Lattice polygons and families of curves on rational surfaces
Creators: name: Lubbes, Niels
name: Schicho, Josef
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: First we solve the problem of finding minimal degree families on toric surfaces by reducing it to lattice geometry. Then we describe how to find minimal degree families on, more generally, rational complex projective surfaces.
พฤติกรรมการอ่านดิจิทัลของนักศึกษาระดับปริญญาตรีในสถาบันอุดมศึกษาของรัฐ
Creators: name: กนกพร สิทธิชัยวรบุตร
Publisher: name: สำนักหอสมุด มหาวิทยาลัยรังสิต
Year: 2564
Subjects: พฤติกรรมการอ่าน
การอ่านดิจิทัล
นักศึกษาระดับปริญญาตรี

description: วารสารรังสิตสารสนเทศ, 27, 2, 117-138
On Free-Electron Laser Growing Modes and their Bandwidth
Creators: name: Webb, Stephen
name: Wang, Gang
name: Litvinenko, Vladimir
Publisher: name: arXiv
Year: 2011
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Free-electron lasers play an increasing role in science, from generating unique femtosecond X- ray pulses for single short recording of the protein structures to amplifying feeble interactions in advanced cooling systems for high-energy hadron colliders. While modern Free-electron laser codes can describe their amplification mechanism, a deep analytical understanding of the mechanism is of extreme importance for a number of applications. Mode competition, their growth rates and amplification bandwidth are among the most important parameters of a free-electron laser. A dispersion relation, which defines these important characteristics, can be solved analytically only for a very few simple cases. In this letter we show that for a typical bell-shape energy distribution in electron beam there is no more that one growing mode. We also derive an analytical expression which determines the bandwidth of the free-electron laser.
description: 4 pages, submitted to PRL
Tunneling from electronic bubble states through the liquid-vapor interface of He2
Creators: name: Rayfield, G. W.
name: Schoepe, Wilfried
Publisher: name: Universität Regensburg
Year: 1971
Subjects: subject: 530 Physik

description: The lifetime of electrons deposited on the liquid surface of 4He was measured. It is smaller than 8 μs at 0.5 K and, as is concluded from its temperature dependence, governed by the electronic mobility parallel to the superfluid surface.
ปัจจัยเชิงสาเหตุที่มีผลต่อความภักดีในการใช้บริการสั่งเครื่องดื่มบนแอปพลิเคชันเดลีรันเนอร์ของผู้บริโภคในเขตกรุงเทพมหานครและปริมณฑล
Creators: name: ณัฐธิดา แสงแก้วสุข
Publisher: name: สำนักหอสมุด มหาวิทยาลัยรังสิต
Year: 2564
Subjects: คุณภาพการบริการ
ความพึงพอใจ
ความภักดี
แอปพลิเคชัน
เดลีรันเนอร์

description: วารสารรังสิตสารสนเทศ, 27, 2, 139-156
The λ-point, entropy and density of rotating He2
Creators: name: Pobell, F.
name: Schoepe, Wilfried
name: Veith, W.
Publisher: name: Universität Regensburg
Year: 1967
Subjects: subject: 530 Physik

description: The λ-point, entropy and density of HeII have been found to be independent of rotation up to ω = 110 sec-1 to within ΔTλ = 10-50 °K, ΔS = 7 × 10-4 joule/mole °K, and Δvarrho/varrho = 2 × 10-6 respectively.
Critical phenomena in N=4 SYM plasma
Creators: name: Buchel, Alex
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Strongly coupled N=4 supersymmetric Yang-Mills plasma at finite temperature and chemical potential for an R-symmetry charge undergoes a second order phase transition. We demonstrate that this phase transition is of the mean field theory type. We explicitly show that the model is in the dynamical universality class of 'model B' according to the classification of Hohenberg and Halperine, with dynamical critical exponent z=4. We study bulk viscosity in the mass deformed version of this theory in the vicinity of the phase transition. We point out that all available models of bulk viscosity at continuous phase transition are in conflict with our explicit holographic computations.
description: 52 pages, 10 figures
Boundary magnetism in liquid 3He at very low temperatures
Creators: name: Ahonen, A. I.
name: Kodama, T.
name: Krusius, M.
name: Paalanen, M. A.
name: Richardson, R. C.
name: Schoepe, Wilfried
name: Takano, Y.
Publisher: name: Universität Regensburg
Year: 1976
Subjects: subject: 530 Physik
subject: 67.30.E- Normal phase of 3He
subject: 67.30.H- Superfluid phase of 3He

description: The low-temperature magnetic susceptibility of normal and superfluid 3He confined between mylar foils spaced 4.0 mu m apart shows a large and field-dependent enhancement over the bulk Fermi liquid magnitude. The excess susceptibility disappears when the liquid is doped with 0.5% 4He. The reason for the excess is unknown. The authors also studied the proton resonance of the mylar substrate and obtained spin polarizations large enough to permit the direct observation of double spin-flip RF absorption.
description: späterer Zeitschr.titel. Journal of Physics C, Condensed matter
Functional effects of a free jejunum flap used for reconstruction in the oropharyngeal region
Creators: name: Michiwaki, Y.
name: Schmelzeisen, R.
name: Hacki, Tamas
name: Michi, K.
Publisher: name: Universität Regensburg
Year: 1993
Subjects: subject: 610 Medizin
subject: Adult
subject: Carcinoma/surgery
subject: Carcinoma, Squamous Cell/surgery
subject: Female
subject: Follow-Up Studies
subject: Glossectomy/rehabilitation
subject: Humans
subject: Jejunum/transplantation
subject: Male
subject: Mandible/surgery
subject: Middle Aged
subject: Mouth Neoplasms/surgery
subject: Oropharyngeal Neoplasms/surgery
subject: Oropharynx/surgery
subject: Palate, Soft/surgery
subject: Phonetics
subject: Speech/physiology
subject: Surgical Flaps/methods
subject: Tongue Neoplasms/surgery

description: Postoperative articulatory function was assessed in 5 patients who had had radical operations for cancers of the oropharyngeal region with surgical reconstruction using free jejunum flaps. A patient with total resection of the soft palate had the lowest scores of 39.9%. 4 patients with less resection than total removal of the soft palate had good scores (86.0%), and the articulatory dysfunction was limited only in plosive sounds produced in the velar region. A comparative study with glossectomized patients revealed that those who had had resection of the oropharynx achieved excellent articulation except for sounds produced in the velar region. The importance of operative function was stressed, to evaluate indications for the surgical technique for reconstruction of large tissue defects after ablation of head and neck cancers, and to improve the quality of life of those patients.
Neutron rich matter, neutron stars, and their crusts
Creators: name: Horowitz, C. J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Neutron rich matter is at the heart of many fundamental questions in Nuclear Physics and Astrophysics. What are the high density phases of QCD? Where did the chemical elements come from? What is the structure of many compact and energetic objects in the heavens, and what determines their electromagnetic, neutrino, and gravitational-wave radiations? Moreover, neutron rich matter is being studied with an extraordinary variety of new tools such as Facility for Rare Isotope Beams (FRIB) and the Laser Interferometer Gravitational Wave Observatory (LIGO). We describe the Lead Radius Experiment (PREX) that is using parity violation to measure the neutron radius in 208Pb. This has important implications for neutron stars and their crusts. Using large scale molecular dynamics, we model the formation of solids in both white dwarfs and neutron stars. We find neutron star crust to be the strongest material known, some 10 billion times stronger than steel. It can support mountains on rotating neutron stars large enough to generate detectable gravitational waves. Finally, we describe a new equation of state for supernova and neutron star merger simulations based on the Virial expansion at low densities, and large scale relativistic mean field calculations.
description: 10 pages, 2 figures, Plenary talk International Nuclear Physics Conference 2010, Vancouver, Ca
พฤติกรรมการแสวงหาสารสนเทศด้านเกษตรอินทรีย์ของเกษตรกร
Creators: name: สุภัทสรา เพ็งเที่ยง
Publisher: name: สำนักหอสมุด มหาวิทยาลัยรังสิต
Year: 2564
Subjects: พฤติกรรมสารสนเทศ
พฤติกรรมการแสวงหาสารสนเทศ
เกษตรอินทรีย์

description: วารสารรังสิตสารสนเทศ, 27, 2, 157-177
A Coupled Quantum Otto Cycle
Creators: name: Thomas, George
name: Johal, Ramandeep S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the 1-d isotropic Heisenberg model of two spin-1/2 systems as a quantum heat engine. The engine undergoes a four-step Otto cycle where the two adiabatic branches involve changing the external magnetic field at a fixed value of the coupling constant. We find conditions for the engine efficiency to be higher than the uncoupled model; in particular, we find an upper bound which is tighter than the Carnot bound. A new domain of parameter values is pointed out which was not feasible in the interaction-free model. Locally, each spin seems to effect the flow of heat in a direction opposite to the global temperature gradient. This seeming contradiction to the second law can be resolved in terms of local effective temperature of the spins.
Rheological characterization of fumed silica lubricating greases
Creators: name: Zakani, Behzad
Publisher: name: University of British Columbia
Year: 2017

description: Lubricating greases have been widely used for rail lubrication systems. For an efficient grease pump design, it is important to study grease shear viscosity and it is also crucial to analyze grease yielding behavior to determine its consistency on rail surface. Among all rheological properties measured through experiments, yield stress is an ill-defined property, which investigation of a reproducible method for its determination can be invaluable. As the flow properties of a material will be usually influenced by the changes in environment temperature, studying the effects of temperature on the rheological properties of grease are important. In this study, different rheological measurements and visualization techniques, previously developed to study a wide range of materials, have been performed to characterize fumed silica based lubricating greases manufactured by L.B. Foster Rail Technologies Corp. Using commercial rheometers and different approaches to determine the yield points of these materials, it was revealed that the values obtained by curve fitting on steady-state flow curves, creep, amplitude sweep crossover and stress ramp-up were roughly similar. The microstructure of this grease was analyzed using Scanning Electron Microscope (SEM) on Cryo and non-Cryo modes. Besides visualizing a new thickener microstructure, it was shown that the heterogeneous structures developed by small fumed silica agglomerates lead to the formation of greases with higher shear viscosities. Finally, thermo-rheological analysis of these samples revealed that these materials follow neither Arrhenius equation nor time-temperature superposition principle.
Trapping and escape of negative ions from the surface of liquid 4He
Creators: name: Rayfield, G. W.
name: Schoepe, Wilfried
Publisher: name: Universität Regensburg
Year: 1971
Subjects: subject: 530 Physik

description: The lifetime of electrons deposited on the liquid surface of 4He was measured. It is smaller than 8 μs at 0.5 K and, as is concluded from its temperature dependence, governed by the electronic mobility parallel to the superfluid surface.
NUDE IMPERATIVE
Creators: name: Akinwale, Toluwalase Praise
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: classificationCode: 470307
subject: English language
classificationCode: 360403
subject: Drama, theatre and performance studies
classificationCode: 360201
subject: Creative writing (incl. scriptwriting)

description: With a particular focus on her twelve years of partnership with Ulay, the life and work of performance artist Marina Abramović are taken as ekphrastic subjects in a research-based poetics reflecting the author’s understandings of art, love and belonging. In dynamic movements of literary form throughout the manuscript, Nude Imperative makes a restless inquiry into the meaning of embodiment as a person in language, desire, and diaspora, the nature of relation between this individual self and the intimate other, and the limits of these human connections; the limits of love.
การวิเคราะห์องค์ประกอบเชิงยืนยันปัจจัยที่มีอิทธิพลต่อความตั้งใจซื้อซ้ำแพ็กเกจทัวร์บนแอปพลิเคชัน Agoda ของผู้บริโภคในเขตกรุงเทพมหานครและปริมณฑล
Creators: name: กฤษฎา ฟักสังข์
Publisher: name: สำนักหอสมุด มหาวิทยาลัยรังสิต
Year: 2564
Subjects: แพ็กเกจทัวร์
แอปพลิเคชัน Agoda
ความตั้งใจซื้อซ้ำ
การวิเคราะห์องค์ประกอบเชิงยืนยัน

description: วารสารรังสิตสารสนเทศ, 27, 2, 178-194
SEJARAH PERKEMBANGAN KEWIRAUSAHAAN DARI ZAMAN KE ZAMAN
Creators: name: MUHAMMAD HALIK ZIANI
Publisher: name: Zenodo
Year: 2022
Subjects: KEWIRAUSAHAAN

description: Wirausaha secara historis sudah dikenal sejak diperkenalkan oleh Richard Castillon pada tahun 1755. Di luar negeri, istilah kewirausahaan telah dikenal sejak abad 16, sedangkan di Indonesia baru dikenal pada akhir abad 20. ... Pada tahun 1980-an, hampir 500 sekolah di Amerika Serikat memberikan pendidikan kewirausahaan
description: -
Qubit-oscillator system: An analytical treatment of the ultrastrong coupling regime
Creators: name: Hausinger, Johannes
name: Grifoni, Milena
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: 530 Physik

description: We examine a two-level system coupled to a quantum oscillator, typically representing experiments in cavity and circuit quantum electrodynamics. We show how such a system can be treated analytically in the ultrastrong coupling limit, where the ratio g/Ω between coupling strength and oscillator frequency approaches unity and goes beyond. In this regime the Jaynes-Cummings model is known to fail because counter-rotating terms have to be taken into account. By using Van Vleck perturbation theory to higher orders in the qubit tunneling matrix element Δ we are able to enlarge the regime of applicability of existing analytical treatments, including, in particular, also the finite-bias case. We present a detailed discussion on the energy spectrum of the system and on the dynamics of the qubit for an oscillator at low temperature. We consider the coupling strength g to all orders, and the validity of our approach is even enhanced in the ultrastrong coupling regime. Looking at the Fourier spectrum of the population difference, we find that many frequencies contribute to the dynamics. They are gathered into groups whose spacing depends on the qubit-oscillator detuning. Furthermore, the dynamics is not governed anymore by a vacuum Rabi splitting which scales linearly with g, but by a nontrivial dressing of the tunneling matrix element, which can be used to suppress specific frequencies through a variation of the coupling.
On The Strength of Tribo-Emission in Sliding of Diamond on Single Crystal Silicon
Creators: name: Abdel-aal, Hisham A
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Triboemission is a phenomenon associated with the sliding of variety of materials. The phenomenon is thought to be related to wear of diamond tools used in precision machining of semiconductors. As such, the physics of emission has recently acquired importance. Many researchers studied emission during scratching of solid surfaces. They observed that the intensity of tribo-induced emission of the electrons, ions, and photons decrease in the order: insulator>semiconductor> conductor. Many experiments conducted to compare the emission of negatively-charged particles in case of the semiconductors Si with that from selected insulators have reported a clear decreasing trend of the tribo-emission intensity as contact progressed over the same wear track for diamond-on-Si. Despite that all of these experiments were performed in vacuum, the origin of the weak signals and the decrease of signal strength in the case of Si centred on the presence of dielectric silicon oxide films formed in air during surface preparation or because of the samples being of mono-crystalline nature. This paper offers an alternative explanation to the behaviour of tribo-emitted particles based on the pressure induced semi-conductor-to-metallic phase transformation that takes place in Si during sliding. It is shown that due to repeated sliding, the wear tracks experience a semiconductor-to- metal transformation that renders the bulk of material immediately under the diamond slider conducting.