Abstract: Techniques facilitating using flow graphs to represent a data analysis program in a cloud based system for open science collaboration and discovery are provided. In an example, a system can represent a data analysis execution as a flow graph where vertices of the flow graph represent function calls made during the data analysis program and edges between the vertices represent objects passed between the functions. In another example, the flow graph can then be annotated using an annotation database to label the recognized function calls and objects. In another example, the system can then semantically label the annotated flow graph by aligning the annotated graph with a knowledge base of data analysis concepts to provide context for the operations being performed by the data analysis program.

Abstract: Systems and methods for determining physical properties of a material in contact with an external surface of a casing disposed in a borehole including inducing, with a transducer, a first shear horizontal (SH) wave in the casing at a first SH order, measuring, with a sensor disposed on the casing, an attenuation of the first SH wave to generate a first measurement, inducing a second SH wave in the casing at a second SH order that is different from the first SH order, measuring an attenuation of the second SH wave to generate a second measurement, and extracting a physical properties of the material in contact with the external surface of the casing from the first and second measurements.

Abstract: Systems, devices, and methods for estimating a value of a downhole parameter of interest. Aspects include an apparatus for evaluating a tubular. The apparatus may include a sensor including an electromagnetic acoustic transducer (EMAT) device configured to be conveyed into the tubular. The EMAT device may include measurement circuitry comprising at least one conductive coil; and a magnet array comprising magnets arranged with a corresponding direction of magnetization of each magnet oriented according to a configuration producing a greater magnetic flux on a first side of the array than on a second side opposing the first side. The magnetic flux produced from the second side may be substantially zero. In embodiments, the configuration of magnets comprises at least a first set of permanent magnets in a linear Halbach configuration.

Abstract: An embodiment of a method of estimating characteristics of an earth formation includes: disposing an acoustic tool in a borehole in an earth formation, the acoustic tool including an acoustic multipole transmitter and at least one multipole acoustic receiver; transmitting acoustic signals into the borehole, the acoustic signals generating at least one acoustic body wave that radiates away from the borehole into a far-field formation region; measuring reflected signals including body waves reflected from reflective boundaries in the far-field formation region; identifying a reflective boundary in the formation and reflection attributes associated with the reflective boundary; and estimating at least one of a thickness, distance and a lateral extent of a hydrocarbon formation feature based on the reflected signals and the reflection attributes.

Abstract: An interbody spinal implant including a body having a top surface, a bottom surface, opposing lateral sides, and opposing anterior and posterior portions. At least a portion of the top surface, the bottom surface, or both surfaces has a roughened surface topography including both micro features and nano features, without sharp teeth that risk damage to bone structures, adapted to grip bone through friction generated when the implant is placed between two vertebrae and to inhibit migration of the implant. The roughened surface topography typically further includes macro features and the macro features, micro features, and nano features overlap. Also disclosed are methods of using such implants and processes of fabricating a roughened surface topography on a surface of an implant. The process includes separate and sequential macro processing, micro processing, and nano processing steps.

Abstract: An air spring for a heavy-duty vehicle includes a bellows chamber, a piston chamber, and at least one opening. The piston chamber is operatively connected to the bellows chamber. The at least one opening is in fluid communication with the bellows chamber and the piston chamber to provide fluid communication between the bellows chamber and the piston chamber. An orifice assembly is disposed adjacent the at least one opening for variably changing the size of the opening. The air spring provides damping to the heavy-duty vehicle.

Abstract: An air spring with damping characteristics for a suspension assembly of a heavy-duty vehicle includes a bellows chamber, a piston chamber and an asymmetrical orifice. The asymmetrical orifice is in fluid communication with the bellows chamber and the piston chamber of the air spring. The asymmetrical orifice provides asymmetrical damping characteristics to the air spring of the heavy-duty vehicle.

Abstract: Systems, devices, and methods for evaluating an earth formation intersected by a borehole using signals produced at a plurality of borehole depths by an ultrasonic transducer in the borehole, the signals produced by the transducer including ringdown signals from the ultrasonic transducer and echo signals from a wall of the borehole from a plurality of azimuthal orientations.

Abstract: A system and method for high-availability inverse synthetic aperture radar (ISAR). In one embodiment a set of quadratic phase vectors, each corresponding to a different acceleration, is multiplied, one at a time, in a Hadamard product, with a 3-dimensional data cube, and a fast Fourier transform (FFT) is taken of the result, to form a 2-dimensional array. The two-dimensional array is made sparse by setting to zero elements that fall below a threshold based on a coherency metric, and the sparse arrays are stacked to form a sparse 3-dimensional image. Projections of the sparse 3-dimensional image are formed for presentation to an operator or an image exploitation system.

Abstract: A method of estimating fractures in an earth formation includes: disposing an acoustic tool in a cased borehole in an earth formation, the acoustic tool including a multipole acoustic transmitter and an acoustic receiver; transmitting an acoustic signal into the borehole; measuring deep shear wave (DSW) signals generated from shear body waves reflected in the formation in a far-field region of the formation around the borehole; and estimating at least a location and an orientation of a fracture in the formation based on the DSW signals.

Abstract: A method of producing an interbody spinal implant. The method includes the steps of obtaining a blank having a top surface, bottom surface, opposing lateral sides, and opposing anterior and posterior portions, and applying a subtractive process (e.g., masked acid etching) to the top surface, the bottom surface, or both surfaces of the blank to form a roughened surface topography. Subsequently, the blank is machined to form the interbody spinal implant, which includes a body having a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a substantially hollow center, and a single vertical aperture where the top surface, the bottom surface, or both surfaces of the interbody spinal implant have the roughened surface topography produced by the subtractive process. This simplified method produces more accurate and repeatable implants with fewer process steps and defects, reducing process time and costs.

Abstract: A spinal implant having a top surface, a bottom surface, opposing lateral sides, and opposing anterior and posterior portions. At least one of the top surface and bottom surface has a roughened surface topography, without sharp teeth that risk damage to bone structures, adapted to grip bone through friction generated when the implant is placed between two vertebrae and to inhibit migration of the implant. At least one of the top surface and the bottom surface also includes at least one self-deploying anchor having an expulsion tab and a bone-engaging tip that causes the implant to resist expulsion once the expulsion tab is deployed.

Abstract: Thermal memory springs may form arches, or have coils or spring arms and truss arms that expand from a relaxed state when the thermal memory springs warm to a temperature that is about the body temperature of a human being. The thermal memory springs may be used to expand interbody implants from a compact state into an expanded state once the implant has been inserted into the desired location within the body and the thermal memory springs that form a part of the implant warms to body temperature. Ends of the expanded thermal memory spring may contact a bone surface, thereby being an anti-expulsion edge.

Abstract: Systems, devices and methods for evaluating an earth formation intersected by a borehole. Method include detecting a reflective boundary in the earth formation by: generating a multipole acoustic signal with a logging tool in the borehole; identifying a shear wave signal resulting from shear body waves reflected in the formation in a near-field region of the formation around the borehole responsive to the generated multipole acoustic signal; and estimating at least a depth along the borehole of the boundary based on the shear wave signal. The boundary may have an angle of incidence with respect to the borehole of greater than 70 degrees. The boundary may be at least one of i) a fracture; and ii) a fault. The method may include evaluating the boundary using at least one attribute of the shear wave signal and the estimated depth.

Abstract: Technologies are disclosed herein for a fluidic composition used to fill or flood a cable, methods for manufacturing the compound, and cables using the composition. The fluidic composition includes a first oil, a second oil, fumed silica, and microspheres. Some formulations of the fluidic composition also include one or more antioxidants. The components of the composition may be blended at temperatures ranging from approximately 80 C to approximately 100 C. In one example, the cable is configured for vertical installations.

Abstract: An interbody spinal implant system includes an implant having separate, but joined top and bottom portions, a socket for receiving an expansion wedge, an expansion wedge, and an anchor pin. The anchor pin includes at least two prongs having a plurality of ridges or teeth. The top portion and the bottom portion each include a slot for receiving a prong of the anchor pin. A movable joint joins the top and bottom portions and allows the top and bottom portions to move vertically relative to each other.

Abstract: Ion optics for use in a conventional or annular or other shaped ion thruster are disclosed including a plurality of planar, spaced apart ion optic electrode pairs sized to include a diameter smaller than the diameter of thruster exhaust and retained in, on or otherwise associated with a frame across the thruster exhaust. An electrical connection may be provided for establishing electrical connectivity among a set of first upstream electrodes and an electrical connection may be provided for establishing electrical connectivity among the second downstream electrodes.

Abstract: In a server device, a method for validating a network path in a network includes receiving a listing of ports from a client device, each port in the listing of ports associated with the server device and receiving a request message from the client device via a first identified port in the listing of ports. The method includes, in response to receiving the request message, opening a subsequent identified port in the listing of ports for communication with the client device and, following opening of the subsequent identified port in the listing of ports, transmitting a response message to the client device via the first identified port.

Abstract: A system for anchoring implants to bones comprises a screw and fixation collar that when connected together inhibit axial movement of the screw and that when connected to an implant with a compatibly shaped aperture inhibit the screw's ability to back out from the bone and back out from the implant. The fixation collar includes a substantially C-shaped configuration partially surrounding a void, with first and second ends defining a gap that is slightly narrower in width than the diameter of the screw and being partially flexible to allow compression and expansion of the fixation collar to snap fit the collar around the screw.

Abstract: A composition and method for a high solids yogurt with reduced water activity. The high solids yogurt can be formed, for example, by culturing a high solids milk. Lactose present in the high solids milk can be hydrolyzed to glucose and galactose. Water activity of the yogurt can be further reduced by applying a vacuum-dehydration process to the high solids yogurt. The water activity of the yogurt can also be reduced by adding solutes to the yogurt. The composition can be used in food products, either in isolation or in combination with other components, for example, grain-based components.