Jacobs Inc. | Date: 2016-11-01
The present invention relates to a suture which is firmly maintained and fixed to an operation site to stably sustain suturing or lifting effects for a long time. More specifically, the present invention provides a suture having a conic or pyramidal shape with a cut top, wherein a suture supporter comprising a communication hole penetrating the both ends is provided at one end. The suture support can have one or more portions which are cut vertically from a lower end at a lower end portion having a larger diameter between the both ends, or a part of the lower end can be removed so as to form one or more gaps formed from the end at a wall of the end portion.
Jacobs Inc. | Date: 2016-09-29
A system for actuating engine valve comprises a main valve actuation motion source configured to supply main valve actuation motions to the at least one engine valve via a main motion load path, and an auxiliary valve actuation motion source separate from the main valve actuation motion source and configured to supply complementary auxiliary valve actuation motions to the at least one engine valve via an auxiliary motion load path. A lost motion component is configured, in one state, to maintain lash between the auxiliary valve actuation motion source and the auxiliary motion load path or within the auxiliary motion load path and, in another state, to take up this lash. The auxiliary valve actuation motion source is further configured to supply at least one lash-prevention valve actuation motion that substantially matches at least one of the main valve actuation motions.
Jacobs Inc. and BorgWarner Inc. | Date: 2016-09-22
In an engine comprising a cylinder having first and second engine valves of a same function type, a system for actuating the first and second engine valves comprises a first and second master pistons that receive first and second valve actuation motions from respective ones of a first and second valve actuation motion source, a first slave piston operatively connected to the first engine valve and configured to hydraulically receive the first valve actuation motions from at least the first master piston and a second slave piston operatively connected to the second engine valve and configured to hydraulically receive the second valve actuation motions from the second master piston. The system further comprises an accumulator and a mode selector valve in hydraulic communication with the first master piston, the first slave piston and the accumulator. The mode selector valve may selectively hydraulically connect the first master piston to the accumulator.
Jacobs Inc. | Date: 2016-04-27
It is provided a method for actuating engine valves, in particular to be used to produce engine braking and brake gas recirculation BGR. The method for selectively actuating engine valves comprising the steps of: disabling main exhaust and intake valve events (923, 932); providing for engine braking two compression release valve events (920) and at least one brake gas recirculation events (922, 924) for an exhaust valve, and providing for engine braking at least one intake valve event (930) for an intake valve for engine braking, whereby a 1.5-cycle compression release engine braking or a full two-cycle compression release engine braking is provided; and reinstituting the main exhaust and intake valve events (923, 932) for positive power operation while disabling at least the compression release valve events (920) and the intake valve events (930).
Jacobs Inc. | Date: 2016-10-12
A surgical procedure kit for inserting a medical tube according to the present invention includes: an insertion pathway formation means configured to include a medical tube provided with a hollow tube main body, a tube member including a hollow conduit having the medical tube received therein and forming a pathway into which the medical tube is to be inserted, and a support member including a support rod which is inserted into the medical tube and has stiffness greater than that of the tube member; and a push means configured to be slidable within the conduit of the tube member and push the medical tube through the conduit of the tube member.
Agency: NSF | Branch: Standard Grant | Program: | Phase: PETROLOGY AND GEOCHEMISTRY | Award Amount: 183.26K | Year: 2016
The chemical compound H2O, which in its liquid state is called water, when it occurs bound in minerals and other solids, influences melting, rheology and plastic behavior of the mineral or material, and the materials thermal and electrical properties. In the case where H2O is bound in minerals deep in the ocean crust, this can result in enhanced generation of magmas, hence volcanic eruptions, and changes in the plasticity, deformation of the lithosphere. In areas where magmas rise to the surface, this H2O is released and forms an important part of the global cycle of H2O. Because most of the H2O on Earth is locked up in minerals in the crust and mantle, the concentration and distribution of H2O in various mantle and lithospheric reservoirs have been inferred primarily from analyses of undegassed glasses and melt inclusions in oceanic basalts through a comparison of their H2O content with incompatible rare earth elements like Cerium. This only provides a rough estimate of the H2O content of the Earth. This research builds off the results of a pilot study and uses a novel new approach to determine how much H2O is stored in minerals in the oceanic mantle and lithosphere, the mechanisms that fractionate H2O from other geochemical tracers in mantle lithologies, and the fate of the H2O and how it impacts the electrical conductivity and rheology of the oceanic lithosphere. Broader impacts of the work include support of a faculty member at an institution in South Carolina, an EPSCoR state (i.e., a state that does not receive significant federal funding), support of a researcher whose gender is under-represented in the sciences, and student training who will get trained on cutting-edge analytical instrumentation at NASA at the Johnson Space Center in Houston, TX. Impacts also include international collaboration with Belgian and Japanese scientists and making the data accessible to the public.
Questions to be addressed by this research include seeing if H2O varies independently from lithophile elements in the lithosphere and if diffusion is responsible if decoupling is observed; looking to see if pyroxenes are typically a high-H2O, low-solidus reservoir; examine if H2O solubility in minerals under lithospheric pressures and temperatures put an upper limit on how much structurally bound H2O is held in the unaltered lithosphere; whether H2O concentrations are reflected in the H2O systematics of lithospheric samples; and whether there are systematic correlations between H2O distribution in the lithosphere and the degree of melting, depth, and lithology and metasomatic agents. To address these issues, Fourier Transform Infrared Spectroscopy (FTIR) will be used to determine the H2O concentrations in well-characterized, fresh (i.e., unaltered) peridotites and pyroxenites from a suite of locations and tectonic settings that include the Canary Islands in the Atlantic Ocean; the Kerguelen Plateau in the South Indian Ocean; the Hawaiian and Samoan Islands and the Ontong Java Plateau in the Pacific Ocean; and the Lena Trough in the Arctic Ocean. Additional geochemical indicators, such as trace element compositions of minerals and radiogenic isotopes of Sr, Hf, Nd, and Pb in minerals and rocks will be used to help determine if there is a link between process, mineralogy, and H2O content/behavior.
Agency: NSF | Branch: Continuing grant | Program: | Phase: PLANETARY ASTRONOMY | Award Amount: 325.14K | Year: 2016
Many spacecraft have gone to Mars; none has returned samples to the Earth. The only samples of material from Mars that we can study here on Earth are the Mars meteorites. Organic matter has been found in some of the Mars meteorites, but scientists cannot agree on when, where, and how the organic matter formed. The investigators will study a sample of six Mars meteorites to learn about the composition and structure of the organics. This research will provide answers on how carbon in the young Mars formed and changed with time. These answers can then be used to address questions about how organic material formed on the young Earth, which places in the Solar System can host life, and what processes lead to the formation of life. This research serves the national interest by advancing our understanding of the processes that create life in and beyond the Solar System. The investigators will give at least two lessons on this study every year though NASAs Johnson Space Centers Classroom Connection Webinars, reaching 500 - 1700 students for each lesson. These lessons are also recorded. The investigators also interact with visiting educators through tours of the laboratory facilities.
Mars meteorites are the only samples of the Martian crust currently available for laboratory analysis. This study will investigate the nature and origin of organic matter present within a suite of Mars meteorites. Although the presence of likely indigenous organic matter has been established in some Mars meteorites, scientists do not agree on when, where or how such matter formed. The answers to these questions are critical to understanding the Martian carbon cycle, the abiotic organic evolution of the early Mars (and by inference the early Earth), the identification of potentially habitable environments in the Solar System, and the processes leading to the origins of life. A selected group of six Mars meteorites will be studied systematically with the objectives of determining:  the molecular composition and abundance of organic phases and, where applicable, the texture and morphology of any discrete organic assemblage; and,  the spatial distribution of organics in relation to the underlying mineralogy. The investigators have pioneered these procedures and techniques in the analysis of extraterrestrial samples, and bring their collective expertise to the study. The investigators will give at least two lessons annually though NASA JSC ARES Classroom Connection Webinars, reaching 500 - 1700 students live, with the lectures archived as recordings. The investigators also interact with visiting educators through tours of the laboratory facilities.
Jacobs Inc. | Date: 2016-06-16
Start-up of an internal combustion engine comprises maintaining one or more engine valves in an engine cylinder in a continuously open state for more than one engine cycle during engine cranking. When it is determined that an engine parameter or transmission oil pressure has reached a predetermined value, maintenance of the one or more engine valves in the continuously open state is discontinued and fuel is subsequently provided to the engine cylinder for engine start-up. In various embodiments, the engine parameter may comprise an engine temperature parameter, an engine pressure parameter or an engine electrical parameter.
Jacobs Inc. | Date: 2016-01-20
A system for actuating one or more engine valves comprises a lost motion assembly including locking elements to selectively lock and unlock a locking mechanism disposed within a valve train such that motions may be likewise selectively applied to, or prevented from being applied to, one or more engine valves. In an embodiment, the locking elements comprise wedges having at least one wedge inclined surface defined according to a cone frustum and configured to engage an outer recess formed in a housing, the outer recess comprising an outer recess inclined surface also defined according to the cone frustum. The device may comprise a locking mechanism disposed within a housing bore in the housing and a snubber also disposed in the housing bore. Furthermore, the outer recess may be configured to permit movement of the locking element along a longitudinal axis of the housing bore.
Jacobs Inc. | Date: 2016-01-08
A lost motion engine valve actuation system and method of actuating an engine valve are disclosed. The system may comprise a valve train element, a pivoting lever, a control piston, and a hydraulic circuit. The pivoting lever may include a first end for contacting the control piston, a second end for transmitting motion to a valve stem and a means for contacting a valve train element. The amount of lost motion provided by the system may be selected by varying the position of the control piston relative to the pivoting lever. Variation of the control piston position may be carried out by placing the control piston in hydraulic communication with a control trigger valve and one or more accumulators. Actuation of the trigger valve releases hydraulic fluid allowing for adjustment of the control piston position. Means for limiting valve seating velocity, filling the hydraulic circuit upon engine start up, and mechanically locking the control piston/lever for a fixed level of valve actuation are also disclosed.