Relevant bibliographies by topics / End surface

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'End surface'

Author: Grafiati
Published: 28 May 2022
Last updated: 18 July 2025

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Journal articles on the topic "End surface"

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Hosokawa, Akira, Naoya Hirose, Takashi Ueda, Tomohiro Koyano, and Tatsuaki Furumoto. "High-Quality End Milling of CFRP – Inclination Milling with High-Helix End Mill –." International Journal of Automation Technology 10, no. 3 (2016): 372–80. http://dx.doi.org/10.20965/ijat.2016.p0372.

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Side milling tests of CFRP (carbon fiber reinforced plastics) containing thermosetting resin are carried out by TiAlN/AlCrN-coated, H2-free DLC (diamond-like carbon)-coated, and CVD diamond-coated carbide end mills without coolant. Two types of end mills having different helix angles of 30° and 60° are used. The film thickness and surface smoothness are varied for the DLC-coated end mills. The cutting characteristics are evaluated by tool wear and surface integrity (i.e., 3D profiles of the machined surface, generation of fluffing, delamination, and pull-out of the carbon fibers). The cutting force and tool flank temperature are also examined for the two types of CFRP composites and the helix angle of the end mill. “Inclination milling,”in which the end mill is tilted so that the resultant cutting force acts parallel to the work surface, is proposed as a novel technique to be used with a high-helix angle end mill. This unique approach enables the reduction of tool wear and improves the surface integrity of machined CFRP surfaces.
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Kogusu, Shinichi, Takakazu Ishimatsu, and Yasuhiko Ougiya. "Rapid Generation of Surface Dimples Using End Milling." International Journal of Automation Technology 1, no. 1 (2007): 45–51. http://dx.doi.org/10.20965/ijat.2007.p0045.

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Structured surfaces on metal are often employed to enhance lubricating features, reduce the hydrodynamic drag force along wings and also decorate the metal surfaces for architectural ornament. It is important to note that only horizontal movements of a ball-end mill at high feed speed generate the indented surface on metal surfaces. In this paper we propose a technique to estimate the dimples generated on the metal surfaces using a machining center with an oval-end mill. Firstly, a technique to simulate the generating process of the dimples with the machining center is explained. The technique is effective in forecasting the geometry of the dimples with accuracy. Secondly, a technique to determine the cutting condition to generate the desired dimpled surface is proposed. The design specifications of the dimpled surface are the geometry of the dimples and the spacing between the dimples. The proposed technique was successfully used to decorate a metal surface.
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Nakao, Takeshi. "End surface reflection type surface acoustic wave device." Journal of the Acoustical Society of America 121, no. 4 (2007): 1833. http://dx.doi.org/10.1121/1.2723993.

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Narita, Hirohisa, Keiichi Shirase, Eiji Arai, and Hideo Fujimoto. "Trial Surface-Property Prediction in End-Mill Operation." International Journal of Automation Technology 4, no. 3 (2010): 229–34. http://dx.doi.org/10.20965/ijat.2010.p0229.

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Because surface precision is an important factor in machined surfaces, we propose a model for predicting surface properties in end-mill operation. Prediction considers cutting edges including a cutting tool movement and rotation and cutter runout and vibration. Experiments confirmed the model’s feasibility.
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Perko, Roland, Hannes Raggam, and Peter M. Roth. "Mapping with Pléiades—End-to-End Workflow." Remote Sensing 11, no. 17 (2019): 2052. http://dx.doi.org/10.3390/rs11172052.

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In this work, we introduce an end-to-end workflow for very high-resolution satellite-based mapping, building the basis for important 3D mapping products: (1) digital surface model, (2) digital terrain model, (3) normalized digital surface model and (4) ortho-rectified image mosaic. In particular, we describe all underlying principles for satellite-based 3D mapping and propose methods that extract these products from multi-view stereo satellite imagery. Our workflow is demonstrated for the Pléiades satellite constellation, however, the applied building blocks are more general and thus also applicable for different setups. Besides introducing the overall end-to-end workflow, we need also to tackle single building blocks: optimization of sensor models represented by rational polynomials, epipolar rectification, image matching, spatial point intersection, data fusion, digital terrain model derivation, ortho rectification and ortho mosaicing. For each of these steps, extensions to the state-of-the-art are proposed and discussed in detail. In addition, a novel approach for terrain model generation is introduced. The second aim of the study is a detailed assessment of the resulting output products. Thus, a variety of data sets showing different acquisition scenarios are gathered, allover comprising 24 Pléiades images. First, the accuracies of the 2D and 3D geo-location are analyzed. Second, surface and terrain models are evaluated, including a critical look on the underlying error metrics and discussing the differences of single stereo, tri-stereo and multi-view data sets. Overall, 3D accuracies in the range of 0 . 2 to 0 . 3 m in planimetry and 0 . 2 to 0 . 4 m in height are achieved w.r.t. ground control points. Retrieved surface models show normalized median absolute deviations around 0 . 9 m in comparison to reference LiDAR data. Multi-view stereo outperforms single stereo in terms of accuracy and completeness of the resulting surface models.
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Biondani, Francesco, Giuliano Bissacco, and Hans Nørgaard Hansen. "Surface topography analysis of ball end milled tool steel surfaces." Procedia CIRP 87 (2020): 153–58. http://dx.doi.org/10.1016/j.procir.2020.03.002.

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Mason, Ralf, Claire A. Jalbert, Patricia A. V. O'Rourke Muisener, et al. "Surface energy and surface composition of end-fluorinated polystyrene." Advances in Colloid and Interface Science 94, no. 1-3 (2001): 1–19. http://dx.doi.org/10.1016/s0001-8686(01)00051-3.

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Yang, Jian, Michael Soltz, Heinrich Russell, et al. "Surface Deformation Analysis of End-to-End Stapled Intestinal Anastomosis." Surgical Innovation 19, no. 3 (2011): 281–87. http://dx.doi.org/10.1177/1553350611426566.

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Liow, Jong Leng, and Ulrich Frye. "Surfaces Machined by Micro End-Mills at Constant Chip Load." Key Engineering Materials 443 (June 2010): 232–37. http://dx.doi.org/10.4028/www.scientific.net/kem.443.232.

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The surfaces of Al6061, machined by 150 μm two flute micro end-mills, were studied to determine their roughness. The surface roughness, Ra, was less than 100 nm but the Ra/Rz ratio ranged from 0.03–0.12. The surface roughness was found to improve with increasing width of cut and to a lesser extent with increasing feed rate. A single pass of the end-mill was found to produce a smoother surface than two passes over the same surface. The surface roughness was found to correspond to the diameter of the end mill and the slope of the secondary cutting edge. To reduce the surface roughness, smaller diameter end mills and chip loads should be used.
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Qin, Yu Xia, Ji Hong Jia, Zhi Wei, Mei Lin Gu, Tong Hui Li, and Yu Tao Wang. "Ball End Milling of Glass with Inclined Cutter." Applied Mechanics and Materials 33 (October 2010): 195–99. http://dx.doi.org/10.4028/www.scientific.net/amm.33.195.

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This study deals with the effect of tool–surface inclination on cutting forces in ball end milling .Since glass undergoes almost no elastic deformation, the shape of the cutter in glass machining has a larger influence on surface finish than that of metal machining. Model of geometry and tilt tool milling process is established. A double helix micro-flute ball end mill made of cemented carbide is used in the groove milling tests with radius 0.5mm at a helix angle of 30°. The rotational axis of the tool is inclined to improve the surface finish. The cutting processes are modeled, and 3-direction cutting forces are measured via three groups of experiments to show the effect of the tool inclination on the machined surface. Several micro grooves, then, are machined with the crack-free surfaces to prove efficiency and surface quality in the milling process.
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Dissertations / Theses on the topic "End surface"

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Miao, X. "Turbine end-wall aerothermal management with engineered surface structure." Thesis, City, University of London, 2018. http://openaccess.city.ac.uk/20405/.

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Motivated by the enlarged design space and additional flexibility offered by the latest advances in manufacturing techniques, especially Additive Manufacturing (AM), this thesis investigates a novel turbine end-wall aerothermal management method with the engineered surface structures, through closely coupled experi-mental and numerical studies. A 90-degree turning duct and a linear turbine cascade test section were employed for the experimental research in a low-speed wind tunnel. Duct and turbine end-wall heat transfer and cooling effectiveness were measured by transient Infrared Thermography. PIV measurement was conducted to obtain the exit flow field. Computational fluid dynamics (CFD) simulations were performed using ANSYS FLUENT to compliment the experimental findings. The flow solver uses the finite volume method to solve the three-dimensional Reynolds-Averaged Navier-Stokes (RANS) equations. The k-ω shear stress transport (SST) turbulence model was validated and chosen for all the numerical studies. The secondary flow control principle of the engineered surface structure in the simplified duct is revealed through a detailed investigation of the flow produced by multiple small surface structures. The CFD and PIV measurement results consistently show that addition of the engineered surface structure on end-wall can effectively reduce the magnitude of streamwise vorticity associated with the secondary flow and alleviate its lift-off motion. For turbine cascade applications, it can be observed that the strength of the passage vortex is effectively reduced, and the passage vortex loss core moves closer to the end-wall with the addition of the engineered surface structure. The purge air cooling enhancement by the engineered surface structure is then studied. The purge air cooling flow becomes more attached to the end-wall and covers a larger wall surface area with the added end-wall rib structures. Both experimental and numerical results reveal a consistent trend on improving film cooling effectiveness and net heat flux reduction (NHFR). This novel concept was success-fully demonstrated in a more realistic turbine cascade case. Enhanced cooling effectiveness and net heat flux reduction were obtained from both experimental data and CFD analysis. The additional surface features were proved to be effective in reducing the passage vortex and providing more coolant coverage without introducing additional aerodynamic loss. The overall Net Heat Load Reduction for the 90-degree turning duct and the turbine cascade is increased by 11% and 2% respectively.
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Gillen, Daniel J. "Surface combatant planning since the end of the Cold War." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA358799.

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Thesis (M.S. in Management) Naval Postgraduate School, December 1998.<br>"December 1998." Thesis advisor(s): Richard B. Doyle, John E. Mutty. Includes bibliographical references (p. 153-161). Also available online.
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Zhang, Zimo. "Effect Of Chain End Functional And Chain Architecture On Surface Segregation." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1498513871263316.

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Zhang, Fan Mr. "BRANCHING AND CHAIN END EFFECTS ON SURFACE FLUCTUATIONS OF POLYSTYRENE MELT FILMS." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1542541224707819.

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Choi, Young Gu. "An integrated computer simulation system to evaluate surface integrity in end milling /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9717175.

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Ahmed, Hamza Hafez Ahmed Anwar. "End-wall flow of a surface-mounted obstacle on a convex hump." Auburn, Ala., 2009. http://hdl.handle.net/10415/1946.

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Melais, Sergio E. "A quasi Yagi antenna with end fire radiation over a metal ground." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0003246.

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Kulkarni, Nitin Madhukar 1957. "Modelling of end milling operation to predict the achievable surface finish and tolerance." Thesis, The University of Arizona, 1993. http://hdl.handle.net/10150/278323.

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With increasing necessity to integrate CAD and CAM, it is necessary to develop more accurate models for predicting the performance of manufacturing processes. Conventionally, process parameters are selected by the process planner based on his experience. For CAD-CAM integration to be meaningful, it should be possible to arrive at the same decisions using computer models for that process. The end milling process is selected for such modeling. The parameters considered are process variables, cutter geometry, cutter material properties, workpiece material properties, workpiece geometry and location and properties of inclusions (if any) in the material. Dynamic Model for end milling is developed and successive iterations are performed to arrive at the speed and feed required to generate a given surface finish and tolerance.
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Fisher, Caitlin. "Surface plasmon polariton excitation by end-fire coupling in a variety of plasmonic materials." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/16045.

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Surface plasmon polaritons are highly localised field oscillations that propagate along interfaces between a dielectric and a metal. Their localised fields make them potential signal carriers between integrated circuits, replacing electronic signals, to allow wider bandwidths and less power dissipation. End-fire coupling is a simple, compact method for exciting surface plasmon polaritons with potential for high coupling efficiency. However, the parameters that determine the mechanism's optimisation are not well understood. We present a semi-analytical model of the end-fire mechanism, in which a free-space incident beam excites a surface plasmon polariton in a configuration with a single transverse dimension. We first model coupling into a surface plasmon polariton on an air-lossless metal interface. Our projection method, a key modelling component, uses an energy conservation expression which includes contributions from both propagating and evanescent fields, which become significant for near-field sources. By optimising the incident beam width and position, we find maximum coupling efficiencies of up to ~90% over the wavelength range of λ∈[0.5,1.8] μm, averaging ~80%. We also find that each excitation produces not only the primary surface plasmon polariton, but also a transversely propagating secondary surface plasmon polariton. We then adapt our method to simulate lossy plasmonic materials, replacing the lossless metal with silver, gold, titanium nitride and zirconium nitride using their values from literature. By optimising the incident beam parameters, we find that the coupling efficiencies of all four materials reach 87% over the range λ∈[0.38,2] μm. These high coupling efficiencies are explained using an impedance-matching argument, concluding that most of the surface plasmon polariton field is in the dielectric, not the plasmonic material. Using a simple analytical model, we show that there is a universal relationship between the optimum beam width and position.
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Shauche, Vishwesh. "Health Assessment based In-process Surface Roughness Prediction System." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1298323430.

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Books on the topic "End surface"

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Gabellanes, I. Computer aided simulation of surface finish geometry resulting from end milling. UMIST, 1994.

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Boyd, Robert C. Annual technical report, year 1, for the Sample Acquisition & Instrument Deployment (SAID). National Aeronautics and Space Administration, 1994.

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Mark, Benson, and United States. National Aeronautics and Space Administration., eds. Rod gripper, changer, and storage system: ME 4182 final report. George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 1989.

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C, Brock John, and United States. National Aeronautics and Space Administration., eds. OCTS and SeaWiFS bio-optical algorithm and product validation and intercomparison in US coastal waters: Year end draft technical memorandum for period of performance July 21, 1997-July 20, 1998. National Aeronautics and Space Administration, 1998.

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C, Brock John, and United States. National Aeronautics and Space Administration., eds. OCTS and SeaWiFS bio-optical algorithm and product validation and intercomparison in US coastal waters: Year end draft technical memorandum for period of performance July 21, 1997-July 20, 1998. National Aeronautics and Space Administration, 1998.

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C, Brock John, and United States. National Aeronautics and Space Administration., eds. OCTS and SeaWiFS bio-optical algorithm and product validation and intercomparison in US coastal waters: Year end draft technical memorandum for period of performance July 21, 1997-July 20, 1998. National Aeronautics and Space Administration, 1998.

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Subari, Khairanum. Three dimensional (3D) characterisation of electrodischarge machining (EDM) and end milling surfaces. University of Birmingham, 1994.

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Guyot, Gérard. Signatures spectrales des surfaces naturelles. Paradigme, 1989.

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1945-, Mittal K. L., and International Symposium on Polymer Surface Modification: Relevance to Adhesion (2nd : 1999 : Las Vegas, Nevada), eds. Polymer surface modification: Relevance to adhesion. VSP, 1996.

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A, Quattrochi Dale, and Luvall Jeffrey C, eds. Thermal remote sensing in land surface processes. CRC Press, 2004.

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Book chapters on the topic "End surface"

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Liu, Jiarui, Yuanpei Zhang, Zhuojun Zou, and Jie Hao. "End-to-End Surface Reconstruction for Touching Trajectories." In Computer Vision – ACCV 2022. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-26293-7_7.

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Rapp, Christoph. "Steady free surface flow." In Hydraulics in Civil Engineering. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-54860-4_13.

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AbstractSteady free surface flow is Chapter 13’s topic which starts with the consideration of sub- and supercritical flow. From the Bernoulli equation for free surfaces, we make our way to the consideration of flows under sluice gates or over weirs, through syphon weirs or Venturi channels. Subsequently steady-state, uniform conditions and the describing equations are elaborated before nonuniform conditions are discussed. The chapter ends with the direct step method, for which, again, open-source codes are provided. At the end of the chapter the reader can solve problems of nonuniform free surface flows.
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Liberale, Carlo, Gheorghe Cojoc, Vijayakumar Rajamanickam, et al. "Miniaturized Optical Tweezers Through Fiber-End Microfabrication." In Springer Series in Surface Sciences. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-06998-2_8.

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Lv, Jin-tao, Xi-ning Huang, JunJiang Zhu, and Zhao-jie Zhang. "An End-to-End Deep Learning Model to Predict Surface Roughness." In Intelligent Equipment, Robots, and Vehicles. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-7213-2_58.

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Petrakov, Yuri, Yuri Danylchenko, Serhii Sapon, and Maksim Sikailo. "Surface Relief Formation in Peripheral End Milling." In Lecture Notes in Mechanical Engineering. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-32767-4_30.

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Ouala, Said, Pierre Tandeo, Bertrand Chapron, Fabrice Collard, and Ronan Fablet. "End-to-End Kalman Filter in a High Dimensional Linear Embedding of the Observations." In Mathematics of Planet Earth. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-18988-3_13.

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AbstractData assimilation techniques are the state-of-the-art approaches in the reconstruction of a spatio-temporal geophysical state such as the atmosphere or the ocean. These methods rely on a numerical model that fills the spatial and temporal gaps in the observational network. Unfortunately, limitations regarding the uncertainty of the state estimate may arise when considering the restriction of the data assimilation problems to a small subset of observations, as encountered for instance in ocean surface reconstruction. These limitations motivated the exploration of reconstruction techniques that do not rely on numerical models. In this context, the increasing availability of geophysical observations and model simulations motivates the exploitation of machine learning tools to tackle the reconstruction of ocean surface variables. In this work, we formulate sea surface spatio-temporal reconstruction problems as state space Bayesian smoothing problems with unknown augmented linear dynamics. The solution of the smoothing problem, given by the Kalman smoother, is written in a differentiable framework which allows, given some training data, to optimize the parameters of the state space model.
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White, Kathleen A., Robert S. Ward, Rusty S. Gill, Florencia Lim, and Sallie K. Coviello. "Surface Modification of Segmented Polyurethaneureas via Oligomeric End Groups Incorporated During Synthesis." In Surface Modification of Polymeric Biomaterials. Springer US, 1996. http://dx.doi.org/10.1007/978-1-4899-1953-3_4.

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Meeks, William, and Joaquín Pérez. "Minimal surfaces with finite topology and more than one end." In A Survey on Classical Minimal Surface Theory. American Mathematical Society, 2012. http://dx.doi.org/10.1090/ulect/060/03.

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Kljajo, Matej, and Danijel Šogorović. "Research of the Surface Roughness Parameters After End Milling." In New Technologies, Development and Application IV. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75275-0_27.

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Morishige, Koichi, Teruhisa Nasu, and Yoshimi Takeuchi. "Five —Axis Control Sculptured Surface Machining Using Conicoid End Mill." In Machining Impossible Shapes. Springer US, 1999. http://dx.doi.org/10.1007/978-0-387-35392-0_38.

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Conference papers on the topic "End surface"

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Li, Beibei, Xiyue Zhang, Minnan Han, Haoxuan Luan, and Shujie Sun. "End-to-End Surface Roughness Prediction Method Driven by Multi-Source Information Fusion." In 2024 10th International Conference on Computer and Communications (ICCC). IEEE, 2024. https://doi.org/10.1109/iccc62609.2024.10941778.

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Wang, Xiaoya, Kexin Chen, and Zengdi Bao. "Surface Wave-Based Conformal End-Fire Antenna With Mitigated Beam Tilt." In 2024 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP). IEEE, 2024. https://doi.org/10.1109/imws-amp62793.2024.10966806.

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Song, Jiayi, Jianing Zhao, Jianyi Zhou, Zhenjia Gao, and Zhiqiang Yu. "A 2-bit Reconfigurable Intelligent Surface Based on Open-end Transmission Lines." In 2024 IEEE 12th Asia-Pacific Conference on Antennas and Propagation (APCAP). IEEE, 2024. https://doi.org/10.1109/apcap62011.2024.10881372.

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Zheng, Qiming, Xiang Jin Zeng, Junyu Cai, and Hetao Ma. "Research on Lightweight Steel Rebar End Surface Detection Algorithm Based on Improved YOLOv8." In 2024 3rd International Conference on Artificial Intelligence and Computer Information Technology (AICIT). IEEE, 2024. http://dx.doi.org/10.1109/aicit62434.2024.10730247.

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Mueller, D., H. F. Dylla, M. G. Bell, et al. "End points in discharge cleaning on TFTR." In Surface Conditioning of vacuum systems. AIP, 1990. http://dx.doi.org/10.1063/1.39064.

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Jin, Shengze, Daniel Barath, Marc Pollefeys, and Iro Armeni. "Q-REG: End-to-End Trainable Point Cloud Registration with Surface Curvature." In 2024 International Conference on 3D Vision (3DV). IEEE, 2024. http://dx.doi.org/10.1109/3dv62453.2024.00120.

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Compertore, David C., Filipp V. Ignatovich, and Michael A. Marcus. "Fiber coupler end face wavefront surface metrology." In SPIE Optical Engineering + Applications, edited by Erik Novak and James D. Trolinger. SPIE, 2015. http://dx.doi.org/10.1117/12.2186627.

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Ismail, Mohd Fauzi, Fatiha Naziera Yusof, and Rizal Mohamed Noor. "Texture formation model for end milling surface." In INTERNATIONAL CONFERENCE ON SMART MATERIALS AND STRUCTURES, ICSMS-2022. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0117693.

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Fu, Yanjun, Wendong Zou, Huirong Xiao, and Yuehong Gan. "A measuring technology for fiber connector end surface." In Photonics Asia 2004, edited by Anbo Wang, Yimo Zhang, and Yukihiro Ishii. SPIE, 2005. http://dx.doi.org/10.1117/12.581452.

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Kim, Taek, Junho Lee, Sangmoon Lee, et al. "End-pumped vertical external cavity surface emitting laser." In Integrated Optoelectronic Devices 2006, edited by Chun Lei and Kent D. Choquette. SPIE, 2006. http://dx.doi.org/10.1117/12.641988.

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Reports on the topic "End surface"

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Murphy, Mr Thomas F. PR-226-9315-R01 Effects of Phosphoric Acid Treatment on Fusion-Bonded Epoxy Coating Performance. Pipeline Research Council International, Inc. (PRCI), 1994. http://dx.doi.org/10.55274/r0011905.

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The objective of the research was to establish whether phosphoric acid treatment of line pipe should routinely be undertaken before the application of FBE coatings where chloride contamination is not present; to determine the levels of treatment which enhance or cause deterioration on the steel surface; to establish any synergism that may exist between specific FOE coatings and phosphoric acid treatment; to determine if coating performance correlates to residual phosphate on the steel surface, and to provide end-user companies with data to enable the proper selection of surface treatments for use with their selected FOE coating.
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Fan, Jianhua, Weiqiang Kong, and Simon Furbo. Simulation and design of collector array units within large systems. IEA SHC Task 55, 2019. http://dx.doi.org/10.18777/ieashc-task55-2019-0006.

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By the end of 2017, solar heating plants with a total surface of more than 1.3 million m2 were in operation in Denmark. Most solar collectors in the existing solar heating plants are typically flat plate collectors (FPC).
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Pawel, Steven J. Assessment of End-of-Life Behavior of the Surface Modification to Improve Cavitation-Erosion Resistance in the Mercury Target at the Spallation Neutron Source. Office of Scientific and Technical Information (OSTI), 2007. http://dx.doi.org/10.2172/931799.

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Hiscock, Adam I. Hiscock, Emily J. Kleber, Susanne U. Jänecke, Greg N. McDonald, Robert Q. Oaks Jr., and Tammy Rittenour. Fault Trace Mapping and Surface-Fault-Rupture Special Study Zone Delineation of the East and West Cache Fault Zones and Other Regional Faults, Utah. Utah Geological Survey, 2024. http://dx.doi.org/10.34191/ri-286.

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The Cache Valley region in northern Utah and southern Idaho contains and is surrounded by several large, hazardous faults which pose significant earthquake risk. The 40-mile-long (65 km) East Cache fault zone (ECFZ) and the 35-mile-long (56 km) West Cache fault zone (WCFZ) bound the Cache Valley graben and both show evidence of large surface-faulting earthquakes in the late Quaternary. Other hazardous faults in the Cache Valley region include the intrabasin Dayton-Oxford fault, the Mantua area faults within the Wellsville Mountains, and the James Peak fault at the very southern end of the ECFZ. This region is a rapidly growing area of northern Utah, with development spreading along the margins of the valley and encroaching on these hazardous fault zones. Airborne light detection and ranging (lidar) elevation data was collected in the Cache Valley area in 2016, 2018, and 2020. High-resolution topographic data derived from these lidar datasets has allowed for a complete update of the mapping of surface traces of the ECFZ, WCFZ, and other regional faults. Previously, the surface location and extent of fault traces associated with these fault zones were not well understood in many areas, owing to limited aerial photography coverage, heavy vegetation near range fronts, and the difficulty in recognizing moderate (&lt;1 m) scarp heights in the field or on aerial photographs. In addition to lidar-derived elevation data, other datasets including previous geologic mapping, paleoseismic investigations, historical aerial photography, and field investigations were used to identify and map surface fault traces and infer fault locations. Special-study zones were delineated around fault traces to facilitate understanding of the surface-rupturing hazard and associated risk. The fault geometries, attributes, and special-study zones were published in the Utah Geologic Hazards Portal simultaneously with this Report of Investigation. Defining surface-fault-rupture special-study zones encourages the creation and implementation of municipal and county geologic-hazard ordinances dealing with hazardous faults. We identified potential paleoseismic investigation sites where fault scarps appear relatively pristine, are in geologically favorable settings, and where additional earthquake timing data would be beneficial to earthquake research of the ECFZ, WCFZ, and other regional faults. This report contains supplementary material describing the data and methods used to perform the mapping and in locating potential paleoseismic investigation sites in the study area. This work is critical to raise awareness of earthquake hazards in areas of Utah experiencing rapid growth.
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5

Rich, William B., Robert R. Jacobs, Christopher S. Williams, and Robert J. Frosch. Repair and Strengthening of Bridges in Indiana Using Fiber Reinforced Polymer Systems: Volume 2–FRP Flexural Strengthening and End Region Repair Experimental Programs. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317310.

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For bridges that are experiencing deterioration, action is needed to ensure the structural performance is adequate for the demands imposed. Innovate repair and strengthening techniques can provide a cost-effective means to efficiently and safely extend the service lives of bridges. The use of fiber reinforced polymer (FRP) systems for the repair and strengthening of concrete bridges is increasing in popularity. Recognizing the potential benefits of the widespread use of FRP, a research project was initiated to determine the most appropriate applications of FRP in Indiana and provide recommendations for the use of FRP in the state for the repair and strengthening of bridges. The details of the research are presented in two volumes. Volume 1 provides the details of a study conducted to (i) summarize the state-of-the-art for the application of FRP to concrete bridges, (ii) identify successful examples of FRP implementation for concrete bridges in the literature and examine past applications of FRP in Indiana through case studies, and (iii) better understand FRP usage and installation procedures in the Midwest and Indiana through industry surveys. Volume 2 presents two experimental programs that were conducted to develop and evaluate various repair and strengthening methodologies used to restore the performance of deteriorated concrete bridge beams. The first program investigated FRP flexural strengthening methods, with focus placed on adjacent box beam bridges. The second experimental program examined potential techniques for repairing deteriorated end regions of prestressed concrete bridge girders. Externally bonded FRP and near-surface-mounted (NSM) FRP were considered in both programs.
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6

Wilson, D., Steven Peckham, Max Krackow, Sora Haley, Sophia Bragdon, and Jay Clausen. Discriminating buried munitions based on physical models for their thermal response. Engineer Research and Development Center (U.S.), 2025. https://doi.org/10.21079/11681/49749.

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Munitions and other objects buried near the Earth’s surface can often be recognized in infrared imagery because their thermal and radiative properties differ from the surrounding undisturbed soil. However, the evolution of the thermal signature over time is subject to many complex interacting processes, including incident solar radiation, heat conduction in the ground, longwave radiation from the surface, and sensible and latent heat exchanges with the atmosphere. This complexity makes development of robust classification algorithms particularly challenging. Machine-learning algorithms, although increasingly popular, often require large training datasets including all environments to which they will be applied. Algorithms incorporating an understanding of the physical processes underlying the thermal signature potentially provide improved performance and mitigate the need for large training datasets. To that end, this report formulates a simplified model for the energy exchange near the ground and describes how it can be incorporated into maximum-likelihood ratio and Bayesian classifiers capable of distinguishing buried objects from their surroundings. In particular, a version of the Bayesian classifier is formulated that leverages the differing amplitude and phase response of a buried object over a 24-hour period. These algorithms will be tested on experimental data in a future study.
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7

Alter, Ross, Sandra LeGrand, Freddie Spates, et al. Meteorological influences of a major dust storm in Southwest Asia during July–August 2018. Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/45960.

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Dust storms can be hazardous for aviation, military activities, and respiratory health and can occur on a wide variety of spatiotemporal scales with little to no warning. To properly forecast these storms, a comprehensive understanding of the meteorological dynamics that control their evolution is a prerequisite. To that end, we chose a major dust storm that occurred in Southwest Asia during July–August 2018 and conducted an observation-based analysis of the meteorological conditions that influenced the storm’s evolution. We found that the main impetus behind the dust storm was a large-scale meteorological system (i.e., a cyclone) that affected Southwest Asia. It seems that cascading effects from this system produced a smaller, near-surface warm anomaly in Mesopotamia that may have triggered the dust storm, guided its trajectory over the Arabian Peninsula, and potentially catalyzed the development of a small low-pressure system over the southeastern end of the peninsula. This low-pressure system may have contributed to some convective activity over the same region. This type of analysis may provide important information about large-scale meteorological forcings for not only this particular dust storm but also for future dust storms in Southwest Asia and other regions of the world.
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8

Ray, Laura, Madeleine Jordan, Steven Arcone, et al. Velocity field in the McMurdo shear zone from annual ground penetrating radar imaging and crevasse matching. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/42623.

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The McMurdo shear zone (MSZ) is strip of heavily crevassed ice oriented in the south-north direction and moving northward. Previous airborne surveys revealed a chaotic crevasse structure superimposed on a set of expected crevasse orientations at 45 degrees to the south-north flow (due to shear stress mechanisms). The dynamics that produced this chaotic structure are poorly understood. Our purpose is to present our field methodology and provide field data that will enable validation of models of the MSZ evolution, and here, we present a method for deriving a local velocity field from ground penetrating radar (GPR) data towards that end. Maps of near-surface crevasses were derived from two annual GPR surveys of a 28 km² region of the MSZ using Eulerian sampling. Our robot-towed and GPS navigated GPR enabled a dense survey grid, with transects of the shear zone at 50 m spacing. Each survey comprised multiple crossings of long (&gt; 1 km) crevasses that appear in echelon on the western and eastern boundaries of the shear zone, as well as two or more crossings of shorter crevasses in the more chaotic zone between the western and eastern boundaries. From these maps, we derived a local velocity field based on the year-to-year movement of the same crevasses. Our velocity field varies significantly from fields previously established using remote sensing and provides more detail than one concurrently derived from a 29-station GPS network. Rather than a simple velocity gradient expected for crevasses oriented approximately 45 degrees to flow direction, we find constant velocity contours oriented diagonally across the shear zone with a wavy fine structure. Although our survey is based on near-surface crevasses, similar crevassing found in marine ice at 160 m depth leads us to conclude that this surface velocity field may hold through the body of meteoric and marine ice. Our success with robot-towed GPR with GPS navigation suggests we may greatly increase our survey areas.
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9

Hurlow, Hugh A., Paul C. Inkenbrandt, and Trevor H. Schlossnagle. Hydrogeology, Groundwater Chemistry, and Water Budget of Juab Valley, Eastern Juab County, Utah. Utah Geological Survey, 2022. http://dx.doi.org/10.34191/ss-170.

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Juab Valley is a north-south-trending basin in the eastern Basin and Range Province. Juab Valley is bounded on the east by the Wasatch normal fault and the Wasatch Range and San Pitch Mountains, bounded on the west by Long Ridge and the West Hills. Juab Valley is at the southern end of Utah’s Wasatch Front, an area of projected rapid population growth and increased groundwater use. East-west-trending surface-water, groundwater, and water-rights boundaries approximately coincide along the valley’s geographic midline at Levan Ridge, an east-west trending watershed divide that separates the north and south parts of Juab Valley. The basin includes, from north to south, the towns of Mona, Nephi, and Levan, which support local agricultural and light-industrial businesses. Groundwater use is essential to Juab Valley’s economy. The Juab Valley study area consists of surficial unconsolidated basin-fill deposits at lower elevations and various bedrock units surrounding and underlying the basin-fill deposits. Quaternary-Tertiary basin-fill deposits form Juab Valley’s primary aquifer. Tertiary volcanic rocks underlie some of the basinfill deposits and form the central part of Long Ridge on the northwest side of the valley. Paleozoic carbonate rocks that crop out in the Mount Nebo area of the Wasatch Range, which receives the greatest average annual precipitation in the study area, likely accommodate infiltration of snowmelt and subsurface groundwater flow to the basin-fill aquifer. The Jurassic Arapien Formation also crops out in the Wasatch Range and San Pitch Mountains, and dissolution of gypsum and halite in the formation and sediments derived from it increases the sulfate, sodium, and total-dissolved-solids concentrations of surface water and groundwater. We grouped the stratigraphy of the Juab Valley study area into 19 hydrostratigraphic units based on known and interpreted hydraulic properties.
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10

Hart, Carl. Vibration survey of Room 47 with a laser doppler vibrometer : Main Laboratory Basement, U.S. Army ERDC-CRREL. Engineer Research and Development Center (U.S.), 2020. http://dx.doi.org/10.21079/11681/38919.

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Plans are underway to create an acousto-optic laboratory on the campus of the Cold Regions Research and Engineering Laboratory. For this purpose, existing space in the basement of the Main Laboratory will be renovated. Demanding measurement techniques, such as interferometry, require a sufficiently quiet vibration environment (i.e., low vibration levels). As such, characterization of existing vibration conditions is necessary to determine vibration isolation requirements so that highly sensitive measurement activities are feasible. To this end, existing vibro-acoustic conditions were briefly surveyed in Room 47, a part of the future laboratory. The survey measured ambient noise and ambient vertical floor vibrations. The ambient vibration environment was characterized according to generic velocity criteria (VC), which are one-third octave band vibration limits. At the time of the survey, the ambient vibration environment fell under a VC-A designation, where the tolerance limit is 2000 μin/s across all one-third octave bands. Under this condition, highly sensitive measurement activities are feasible on a vibration-isolated working surface. The conclusion of this report provides isolation efficiency requirements that satisfy VC-E limits (125 μin/s), which are necessary for interferometric measurements.
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