Estimation of Instantaneous Speed for Rotating Systems: New Processing Techniques

The availability of seismic digital field recording equipment has made possible new processing techniques which achieve significant reflection data enhancement. Typical of the processes that are now used routinely are deconvolution, autocorrelation and crosscorrelation, Fourier transformation, and spectral alteration. A recording fidelity that reduces errors to 1 part in 10,000 has provided the motive for developing and using these techniques. An additional capability of digital field equipment is the recording of amplifier gain information to a precision of 0.1 percent. This appears to provide a motive for developing multichannel processes which expand further our processing capabilities beyond the essentially single channel ones now in use. The present study evaluates the multichannel processing potential afforded by present day seismic digital field recording systems. The evaluation is based on measurement and computation of the effects of channel performance deviations. Each component of the field recording system (geophone, cable, amplifier, filters, sampling skew) separately, and the system as a whole, are evaluated in this context. Results of the study indicate that whereas any given channel possesses a dynamic range of 80 db, channel‐to‐channel variations establish a dynamic range of only 15 db. The 15 db range sets a serious limit on the performance of multichannel processes and points up the need for additional improvements in field hardware capabilities.

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New Processing Techniques for the Creation of Micro-Opto-Mechanical Machines and Photonic Devices Embedded in Glass

MRS Proceedings ◽

10.1557/proc-739-h1.6 ◽

2002 ◽

Vol 739 ◽

Author(s):

Meg Abraham ◽

Peter Fuqua ◽

David P. Taylor ◽

William W. Hansen ◽

Henry Helvajian ◽

...

Keyword(s):

Silver Halide ◽

Three Dimensional ◽

Direct Write ◽

Buried Structures ◽

Nucleation Sites ◽

New Processing ◽

Meta Silicate ◽

Processing Techniques ◽

Aerospace Corporation ◽

Nano Wires

ABSTRACTThe use of lasers to create intricate three-dimensional and buried structures [1] in photostructural glass has been well demonstrated at The Aerospace Corporation over the past four years. In these instances the glass used (Foturan™, made by the Schott Group) forms a silver nucleation sites on exposure to intense UV laser light via a two-photon process. Subsequent annealing causes a localized crystal growth to form a meta-silicate phase which can be etched in dilute hydrofluoric acid at rates of 20 to 50 times that of the unprocessed glass. We are now in the process of experimenting with another formulation of photosensitive glass, also pioneered by Corning Glass Works, that behaves differently during the bake process. In the second case, a photoexposure and bake process creates a silver-halide crystal and forms an adjacent void in the glass. A second photoexposure and bake allows for the migration of more silver into the void creating patterned formations of silver nano-wires [2]. Recent experiments with this type of glass have shown that the manipulation of the size and density of the embedded nano-wires as well as the overall pattern of the clusters can be controlled using direct-write exposure to laser processing.

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Microstructural effects on properties and new processing techniques of silicon nitride. Part I: Microstructural effects on mechanical, thermal and thermomechanical Properties of Silicon Nitride

Materialwissenschaft und Werkstofftechnik ◽

10.1002/mawe.19830140507 ◽

1983 ◽

Vol 14 (5) ◽

pp. 147-156 ◽

Cited By ~ 2

Author(s):

G. Ziegler

Keyword(s):

Silicon Nitride ◽

Thermomechanical Properties ◽

Microstructural Effects ◽

New Processing ◽

Processing Techniques

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Approaches to the Design and Processing of Novel Titanium Alloys

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.29-30.127 ◽

2007 ◽

Vol 29-30 ◽

pp. 127-130

Author(s):

Colleen J. Bettles ◽

Rimma Lapovok ◽

H.P. Ng ◽

Dacian Tomus ◽

Barry C. Muddle

Keyword(s):

Titanium Alloys ◽

High Performance ◽

Powder Processing ◽

Low Cost ◽

Cost Effective ◽

Processing Technologies ◽

Shape Processing ◽

New Processing ◽

The Cost ◽

Processing Techniques

The range of commercial titanium alloys available is currently extremely restricted, with one alloy (Ti-6Al-4V), and derivatives of it, accounting for a very large proportion of all applications. High performance alloys are costly to fabricate and limited to low-volume applications that can sustain the cost. With the emergence of new processing technologies that promise to reduce significantly the cost of production of titanium metal, especially in powder form, there is an emerging imperative for cost-effective near net shape powder processing techniques to permit the benefit of reduced metal cost to be passed on to higher-volume applications. Equally, there is a need for the design and development of new alloys that are intrinsically low-cost and lend themselves to fabrication by novel cost-effective net shape processing. The approaches that might be used to select, design and process both conventional alloys and novel alloy systems will be reviewed, with a focus on innovation in design of low-cost alloys amenable to new processing paths and increasingly tolerant of variability in composition.

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The Fabrication and Magnetic Shielding Properties of Melt Cast Bi‐Sr‐Ca‐Cu‐O

MRS Proceedings ◽

10.1557/proc-169-1279 ◽

1989 ◽

Vol 169 ◽

Author(s):

R.J. Rayne ◽

L.E. Toth ◽

B.A. Bender ◽

S.H. Lawrence ◽

R.J. Soulen ◽

...

Keyword(s):

Superconducting Devices ◽

Heat Treating ◽

Superconducting Properties ◽

Dimensional Control ◽

Magnetic Shields ◽

Bulk Superconductors ◽

Complex Shapes ◽

Shielding Properties ◽

New Processing ◽

Processing Techniques

AbstractMagnetic shields for SQUID applications were successfully fabricated using high Tc superconducting BSCCO. To produce shields with appropriate superconducting properties and close dimensional control, it was necessary to develop new processing techniques. Shields were produced by casting liquid BSCCO into molds, heat treating and machining. This technique is applicable to fabricating other types of superconducting devices requiring bulk superconductors with complex shapes and close dimensional control.

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Hydrothermal treatment favors peeling of 'Pera' sweet orange fruit and does not alter quality

Scientia Agricola ◽

10.1590/s0103-90162008000200007 ◽

2008 ◽

Vol 65 (2) ◽

pp. 151-156 ◽

Cited By ~ 9

Author(s):

Maria Cecília de Arruda ◽

Angelo Pedro Jacomino ◽

Ana Luíza Pinheiro ◽

Rafael Vasconcelos Ribeiro ◽

Michelle Antonio Lochoski ◽

...

Keyword(s):

Hydrothermal Treatment ◽

Respiratory Activity ◽

Sweet Orange ◽

Ascorbic Acid Content ◽

Titratable Acidity ◽

Soluble Solids ◽

Orange Fruit ◽

New Processing ◽

Processing Techniques ◽

Fruit Flavor

Consumer demand for ready-to-eat-products has stimulated the development of new processing techniques to prepare fresh-cut fruit and vegetables. The aim of this study was to propose a peeling method for 'Pera' oranges (Citrus sinensis [L.] Osb.) by using a hydrothermal treatment and to determine its influence on the respiratory activity, physicochemical and sensorial characteristics, as well as on the peeling time. Cooled oranges (6ºC) were immersed in heated water (50ºC) for eight minutes and then, peeled and stored at 6ºC. The internal fruit temperatures taken at 1 and 3 cm depths (from fruit surface) were 15ºC and 10ºC, respectively, at the end of the hydrothermal treatment. Non-hydrothermally-treated peeled oranges were used as control. The peeling time for treated oranges was 3.2 times as short as the time used for the control. The yield of marketable oranges was 95% for hydrothermally-treated oranges versus 60% for control. The respiratory activity of hydrothermally-treated oranges was greater than that of control oranges only during the first hour after peeling. The hydrothermal treatment influenced neither the physicochemical quality (given by soluble solids, titratable acidity and ascorbic acid content) nor fruit flavor. Oranges peeled with the aid of the hydrothermal treatment had better appearance. The hydrothermal treatment makes the peeling of oranges easier and does not affect their respiratory activity or their physicochemical and sensorial qualities.

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Processing Technologies for Bee Products: An Overview of Recent Developments and Perspectives

Frontiers in Nutrition ◽

10.3389/fnut.2021.727181 ◽

2021 ◽

Vol 8 ◽

Author(s):

Xuan Luo ◽

Yating Dong ◽

Chen Gu ◽

Xueli Zhang ◽

Haile Ma

Keyword(s):

Large Scale ◽

Royal Jelly ◽

Isolation And Identification ◽

Processing Technologies ◽

The Past ◽

Recent Developments ◽

Fluidized Bed Drying ◽

Accelerated Studies ◽

New Processing ◽

Processing Techniques

Increased demand for a more balanced, healthy, and safe diet has accelerated studies on natural bee products (including honey, bee bread, bee collected pollen royal jelly, propolis, beeswax, and bee venom) over the past decade. Advanced food processing techniques, such as ultrasonication and microwave and infrared (IR) irradiation, either has gained popularity as alternatives or combined with conventional processing techniques for diverse applications in apiculture products at laboratory or industrial scale. The processing techniques used for each bee products have comprehensively summarized in this review, including drying (traditional drying, infrared drying, microwave-assisted traditional drying or vacuum drying, and low temperature high velocity-assisted fluidized bed drying), storage, extraction, isolation, and identification; the assessment methods related to the quality control of bee products are also fully mentioned. The different processing techniques applied in bee products aim to provide more healthy active ingredients largely and effectively. Furthermore, improved the product quality with a shorter processing time and reduced operational cost are achieved using conventional or emerging processing techniques. This review will increase the positive ratings of the combined new processing techniques according to the needs of the bee products. The importance of the models for process optimization on a large scale is also emphasized in the future.

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