Push Type Fastener

A push type fastener for fastening a movable structural part to a fixed structural part, wherein the coupling and decoupling actions are both a push type operation, the fastener consisting of a plunger having a shank with a plunger head at one end and a threaded end portion at the other end, an expandable grommet adapted to receive the plunger shank there through, and an attachable head which is securable to the threaded end of the plunger shank. The fastener requires each structural part to be provided with an aperture and the attachable head to be smaller than the aperture in the second structural part. The plunger is extensible through the grommet and is structurally configured with an external camming surface which is cooperatively engageable with internal surfaces of the grommet so that when the plunger is inserted in the grommet, the relative positioning of said cooperable camming surfaces determines the expansion of the grommet. Coupling of the parts is effected when the grommet is inserted in the aperture in the fixed structural part and expanded by pushing the plunger head and plunger at least a minimal distance through the grommet. Decoupling is effected by pushing the attachable head

Push type fastener

A push type fastener for fastening a movable structural part (41) to a fixed structural part (43), wherein the coupling and decoupling actions are both a push type operation, the fastener consisting of a plunger (12) having a shank (20) with a plunger head (18) at one end and a threaded end portion (26a) at the other end, an expandable grommet (14) adapted to receive the plunger shank (20) therethrough, and an attachable head (16) which is securable to the threaded end of the plunger shank (20). The fastener (10) requires each structural part (41, 43) to be provided with an aperture (45, 46) and the attachable head (16) to be smaller than the aperture (46) in the second structural part. The plunger (12) is extensible through the grommet (14) and is structurally configured with an external camming surface (25) which is cooperatively engageable with internal surfaces (38) of the grommet so that when the plunger is inserted in the grommet, the relative positioning of said cooperable camming surfaces determines the expansion of the grommet. Coupling of the parts is effected when the grommet is inserted in the aperture (46) in the fixed structural part (43) and expanded by pushing the plunger head (18) and plunger at least a minimal distance through the grommet. Decoupling is effected by pushing the attachable head (16)

Quantum Walks on Trees with Disorder: Decay, Diffusion, and Localization

Quantum walks have been shown to have impressive transport properties compared to classical random walks. However, imperfections in the quantum walk algorithm can destroy any quantum mechanical speed-up due to Anderson localization. We numerically study the effect of static disorder on a quantum walk on the glued trees graph. For small disorder, we find that the dominant effect is a type of quantum decay, and not quantum localization. For intermediate disorder, there is a crossover to diffusive transport, while a localization transition is observed at large disorder, in agreement with Anderson localization on the Cayley tree.Comment: 12 pages, 13 figure

Integrable families of hard-core particles with unequal masses in a one-dimensional harmonic trap

We show that the dynamics of particles in a one-dimensional harmonic trap with hard-core interactions can be solvable for certain arrangements of unequal masses. For any number of particles, there exist two families of unequal mass particles that have integrable dynamics, and there are additional exceptional cases for three, four and five particles. The integrable mass families are classified by Coxeter reflection groups and the corresponding solutions are Bethe ansatz-like superpositions of hyperspherical harmonics in the relative hyperangular coordinates that are then restricted to sectors of fixed particle order. We also provide evidence for superintegrability of these Coxeter mass families and conjecture maximal superintegrability.Comment: 9.5+4.5 pages, 5 figures, 2 tables; v3: a few corrections and addition

Sedimentary Record of Cretaceous and Teritiary Salt Movement, East Texas Basin: Times, Rates and Volumes of Salt Flow Implications to Nuclear-Waste Isolation and Petroleum Exploration

Post-Aptian strata (younger than 112 Ma) in the East Texas Basin were strongly influenced by halokinesis and record the evolution of associated salt structures. Comparisons with model diapirs and dome-induced changes in patterns of sandstone distribution, depositional facies, and reef growth indicate that thickness variations in strata surrounding domes were caused by syndepositional processes rather than by tectonic distortion. Salt domes in the East Texas Basin exhibit three stages of growth: pillow, diapir, and post-diapir. Each stage affected surrounding strata differently. Pillow growth caused broad uplifting of strata over the crest of the pillows. The resulting topographic swells influenced depositional trends and were susceptible to erosion. Fluvial-channel systems bypassed pillow crests and stacked vertically in primary peripheral sinks on the updip flanks of the pillows. Diapir growth was characterized by expanded sections of shelf and deltaic strata in secondary peripheral sinks around the diapirs. Lower Cretaceous (Aptian) reefs on topographic saddles between secondary peripheral sinks now host major oil production at Fairway Field. Post diapir crestal uplifting and peripheral subsidence affected smaller areas than did equivalent processes that occurred during pillow or diapir stages. Pre-Aptian domes grew in three areas around the margin of the diapir province, apparently in pre-Aptian depocenters. Maximum dome growth along the basin axis coincided with maximum regional sedimentation there during the mid-Cretaceous (Aptian, Albian, and Cenomanian stages). In the Late Cretaceous, the sites of maximum diapirism migrated to the margin of the diapir province. Diapirism began after pillows were erosionally breached, which led to salt extrusion and formation of peripheral sinks.Bureau of Economic Geolog

Suitability of Salt Domes in The East Texas Basin For Nuclear-Waste Isolation: Final Summary of Geologic and Hydrogeologic Research

This report summarizes results of the East Texas Waste Isolation program from January 1, 1978, to March 30, 1983. Using an extensive database, the study comprised 33 different lines of research by 67 scientists and research assistants. The program covered both basin-wide and site-specific (mainly around Oakwood Dome) studies using surface and subsurface data. A wide range of pertinent geologic and economic data for all 15 shallow salt domes is summarized in Appendix 2. Mesozoic opening of the Gulf of Mexico accompanied thermal processes that controlled sedimentation during filling of the East Texas Basin. The basin contains up to 7,000 meters of shallow-marine and continental sediments overlying the Louann Salt. Deformation in the basin resulted from subsidence of its floor and gravitational flow of salt. The East Texas Basin is divided into four provinces based on the shape of salt structures. Five forces drive salt flow; they operate from near surface to the deepest parts of the basin. Salt flow began in pre-Gilmer (Late Jurassic) time with the growth of salt pillows. Three groups of diapirs can be differentiated based on age and distribution. The growing salt structures affected topography, thereby influencing depositional facies. Low-permeability facies generally surround the salt stocks. Two types of structural inversion affected the structure of strata during diapirism. Geomorphic evidence does not preclude Quaternary uplift over Oakwood Dome, but its southern flank may have subsided. The rates of dome growth declined exponentially with time to rates less than 0.6 meters per 10^4 years. All regional fault systems in the basin appear to be related to slow gravitational creep of salt. Nevertheless, at least eight probable earthquakes were recorded near the southern margin of the basin in 1981 and 1982, and their probable focus - the Mount Enterprise fault - is poorly understood.Bureau of Economic Geolog

Assessing the Sociology of Sport: On the Trajectory, Challenges, and Future of the Field

This document is the Accepted Manuscript version of the following article: Elizabeth C. J. Pike, Steven J. Jackson, and Lawrence A. Wenner, 'Assessing the sociology of sport: On the trajectory, challenges, and future of the field'. The final, definitive version of this paper has been published in International Review for the Sociology of Sport, Vol. 50 (4-5), May 2015, doi: https://doi.org/10.1177/1012690215574127, published by SAGE Publishing, All rights reserved. © The Author(s) 2015.On the fiftieth anniversary of the International Sociology of Sport Association and the International Review for the Sociology of Sport, the three guest editors for this special fiftieth anniversary issue of the IRSS, current ISSA president, Elizabeth CJ Pike, the immediate past president, Steven J Jackson, and current IRSS editor, Lawrence A Wenner, introduce the issue’s genesis and theme: ‘50@50: Assessing the trajectory and challenges of the sociology of sport’. In considering the trajectory of the sociology of sport, the ISSA and the IRSS, they reflect on the early development of the field and the founding of an international association and journal aimed at understanding sport in the social and cultural dynamic; they note early and ongoing challenges concerning the academic seating of the field, its legitimacy and impact, and its engagement with the public sphere and the ‘sociological imagination’. Speaking to the challenges of fashioning a special issue to represent the breadth of 50 years of the sociology of sport, the editors outline how a ‘50@50’ strategy was implemented to bring perspectives from 50 notable scholars and to ensure that a diversity of voices was heard, not only on a range of themes, theories and methods, but from diverse identities and locales. Addressing two overarching challenges – the global dominance of English as the lingua franca of scholarly discourse and the need to advance interdisciplinarity and engagement with scholars beyond the sociology of sport – will be key to broadening dialogue to help ensure the future sustainability and progress of the sociology of sport.Peer reviewedFinal Accepted Versio

Time-Delayed Integration–Spectral Flow Cytometer (TDI-SFC) for Low-Abundance-Cell Immunophenotyping

This document is the Accepted Manuscript version of a Published Work that appeared in final form in Analytical Chemistry, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://doi.org/10.1021/acs.analchem.9b00021.We describe a unique flow cytometer (TDI-SFC) for the immunophenotyping of low-abundance cells, particularly when cell counts are sample-limited and operationally difficult for analysis by fluorescence microscopy (>100 cells) or multiparameter flow cytometry (MFC, <10 000 cells). TDI-SFC combines the high spectral resolution of spectral flow cytometry (SFC) with a CCD operated in time-delayed integration (TDI) for improved duty cycle and sensitivity. Cells were focused with a 1D-sheathing microfluidic device, and fluorescence emission generated from a 488 nm laser was collected by epi-illumination and dispersed along one axis of a CCD by a spectrograph. Along the other axis, the CCD’s shift rate was clocked at a rate that closely matched the cells’ velocity through the field of view. This TDI-SFC format allowed the CCD shutter to remain open during signal acquisition, providing a duty cycle ∼100% and assurance that ∼95% cells were interrogated. We used fluorescent beads to optimize synchronization of TDI clocking with the sheathed-cell velocity and to improve sensitivity via the excitation intensity, epi-illumination numerical aperture, and integration time. TDI achieved integrated signals of 106 counts at a signal-to-noise ratio (SNR) of 610 for beads corresponding to a load of 4 × 105 antibodies. We also evaluated multiplexing capabilities by spectral deconvolution and undertook a proof-of-concept application to immunophenotype low-abundance cells; the demonstration consisted of immunophenotyping a model cell line, in this case SUP-B15 cells representing B-cell acute lymphoblastic leukemia (B-ALL). The B-ALL cell line was stained against a leukemic marker (terminal deoxynucleotidyl transferase, TdT), and we successfully used spectral unmixing to discriminate TdT(+) cells from TdT(−) cells even at low cell counts (∼100 cells). The TDI-SFC could potentially be used in any application requiring the immunophenotyping of low-abundance cells, such as in monitoring measurable residual disease in acute leukemias following affinity enrichment of circulating leukemia cells from peripheral blood

Delay-bandwidth and delay-loss limitations for cloaking of large objects

Based on a simple model of ground-plane cloaking, we argue that the diffculty of cloaking is fundamentally limited by delay-loss and delaylbandwidth/size limitations that worsen as the size of the object to be cloaked increases relative to the wavelength. These considerations must be taken into account when scaling experimental cloaking demonstrations from wavelength-scale objects towards larger sizes, and suggest quantitative material/loss challenges in cloaking human-scale objects.Comment: 4 pages, 2 figure