Abstract: This invention is concerned with estimating a massive multi-input multi-output (MIMO) channel. In one embodiment, the transmit antennas are first partitioned into antenna groups each comprising a subset of the transmit antennas such that a pre-determined level of channel-estimation accuracy is attainable. For each antenna group, training signals for estimating a group of channels associated with the antenna group are determined. In particular, the number of the antenna groups, the subset of the transmit antennas for forming the antenna group, and the training signals for the antenna group are determined based on spatial correlations of the massive MIMO channel, a maximum allowable total number of training signals and a transmit signal-to-noise ratio such that the pre-determined level of channel-estimation accuracy is achievable. Advantageously, the number of antenna groups is determined by identifying a highest number of antenna groups under a constraint that the pre-determined level is achievable.

Abstract: One embodiment of the present invention is directed to compositions and methods for enhancing attachment of soft tissues to a metal prosthetic device. In one embodiment a construct is provided comprising a metal implant having a porous metal region, wherein the porous region exhibits a nano-textured surface, and a biocompatible polymer matrix coating the nano-textured surface. The polymer matrix coating comprises a naturally occurring extracellular matrix with biocompatible inorganic materials distributed within the matrix, or a biocompatible polymer and an osteo-inductive agent.

Abstract: A sheet metal forming device and a process for reducing springback during forming of sheet metal. The sheet metal forming device includes a die tool that has a corner and a roller that at least partially forms the corner. The roller rotates relative to the die tool during and/or after forming of a piece of sheet metal around the corner. The rotation of the roller can be either a rotation that freely occurs during the forming process or rotation that is forcibly imposed on the roller during and/or after the forming process.

Abstract: A system and method for non-destructive monitoring a component including a guided wave sensor positioned around a surface of the component, wherein the component has a perimeter. A first spring mounting clamp positioned around the component perimeter and a second spring mounting clamp positioned around the component perimeter, wherein the first and second mounting clamps are positioned a distance of 0.1 inches to 5.0 inches on either side of the guided wave sensor. A plurality of elongated springs is attached at a first end to the first spring mounting clamp and attached at a second end to the second spring mounting clamp. The central portion applying a pressure of at least 10 psi to the guided wave sensor.

Abstract: Highly efficient digital domain sub-band based receivers and transmitters.

Abstract: The invention generally relates to a sample dispenser including an internal standard and methods of use thereof. In certain embodiments, the invention provides a fluid dispenser that includes a fluid chamber. A portion of an inner wall of the chamber includes an internal standard. The chamber is configured such that fluid introduced to the chamber must interact with the portion of the chamber wall that includes the internal standard prior to flowing through an outlet of the chamber. The dispenser additionally includes a member coupled to the chamber such that it can control movement of fluid within the chamber.

Abstract: A combination includes a child-resistant package and a collapsible tube removably positionable therein. A sidewall of a body of the package has an interior surface and an opposing exterior surface. A cavity is defined by the body. An opening is positioned proximate an open first end of the body. A bottom wall is positioned proximate an open second end of the body. A cap is removably mounted onto at least a portion of the first end of the body. The collapsible tube is surrounded by the body, the bottom wall and the cap when the cap is mounted onto at least a portion of the first end of the body. The collapsible tube includes a generally flexible housing defining a cavity for holding a substance to be dispensed from the housing. A closure is removably mounted onto the housing.

Abstract: Provided is a preparation method of a crystalline silicon film.

Abstract: A goal-oriented numerical control automatic tuning system is used for a numerical controller of a machine tool to automatically tune the machine tool. The system includes a goal-oriented input module for receiving external goal values; a machining test path selecting module for receiving an external machining path; and an automatic machine-tuning equation module including a control equation with a predetermined equation coefficient for receiving the goal values and the machining path from the goal-oriented input module and the machining test path selecting module, respectively, such that an appropriate control parameter can be obtained by calculating the control equation based on the goal values and the machining path, and then this control parameter passed to a numerical controller in order to control actuation of the machine tool.

Abstract: Disclosed is an authentication method of a wireless mesh network capable of reducing overload and communication delay during authentication procedure by performing authentication between nodes without accessing an authentication server. The authentication method of a wireless mesh network according to an exemplary embodiment of the present disclosure includes: selecting, by a new node, a first neighbor node among one or more adjacent nodes; transmitting, by the new node, an authentication request message including a public key of the new node; authenticating, by the first neighbor node, the public key of the new node; transmitting, by the first neighbor node, an authentication response message including a public key of the first neighbor node to the new node; and authenticating, by the new node, the public key of the first neighbor node; transmitting, by the new node, an authentication identification message to the first neighbor node.

Abstract: A process for the preparation of a pharmaceutically effective extract from the cyanobacterium Arthrospira sp. having the following steps: extrusion of a powder containing Arthrospira sp. with the addition of water; extraction of the extrudate with an organic solvent; and provision of the extract as a pharmaceutically effective composition.

Abstract: A solar cell is disclosed. The solar cell includes a transparent conductive layer formed on a substrate, microstructures protruding vertically aslant from a surface of the transparent conductive layer, an electron transport layer configured to cover the microstructures and formed of an electron transport metal oxide, a light absorber adhered to inner pores and a surface of the electron transport layer, a hole transport layer configured to cover the surface of the electron transport layer and formed of a hole transport material, and an electrode formed on the hole transport layer. In the solar cell, the thickness of a light absorption layer can be maximized to obtain a high current density and high photoelectric conversion efficiency.

Abstract: System and method for detecting a leak in a pipeline with a sensing cable including an optical fiber sensor array aligned with a heating element. At least one heat pulse is propagated through the heating element along at least a portion of the sensing cable to affect an exchange of thermal energy between the heating element and fluid exposed to the sensing cable. A temperature profile of the sensing cable corresponding to the heat pulse at each of a plurality of sensor locations on the optical fiber sensor array is measured over time. A leak in a pipeline is detected by determining one or more properties of the fluid exposed to the sensing cable at each of the plurality of sensor locations based on the temperature profile corresponding thereto.

Abstract: A collimator assembly for use with radiation therapy systems, in particular stereotactic radiosurgery (“SRS”) systems, is provided. In general, the collimator assembly includes a collimator in which a plurality of concentric, conical slits is formed. Each conical slit is oriented along a different slit angle, such that radiation impinging on the top surface of the collimator is redirected along each conical slit towards a common target isocenter located at a distance away from the bottom surface of the collimator. The conical slits can be referred to as “Compton slits” because they are designed to increase the radiation output at the isocenter of the collimator by redirecting Compton scattered radiation towards the isocenter in the target region. The collimator assembly thus improves the efficiency of a radiation treatment system by utilizing Compton scattered radiation that would otherwise be lost.

Abstract: The invention generally relates to methods and devices for synchronization of ion generation with cycling of a discontinuous atmospheric interface. In certain embodiments, the invention provides a system for analyzing a sample that includes a mass spectrometry probe that generates sample ions, a discontinuous atmospheric interface, and a mass analyzer, in which the system is configured such that ion formation is synchronized with cycling of the discontinuous atmospheric interface.

Abstract: The prediction of hardware failure is obtained by operating two redundant circuit modules while one circuit module is artificially aged. The output of the two circuit modules is compared and a discrepancy between outputs indicates a projected failure of the aged modules. Aging may be accomplished by one or a combination of lowering operating voltages and re-phasing a sampling clock to reduce slack time both of which provide increased sensitivity to gate delay.

Abstract: A grating structure and a solar cell assembly. In one aspect, the grating structure suppresses the zero order transmission to near 0%. In another aspect, the solar cell assembly has improved absorption due to coupling with a grating structure.

Abstract: There is presently provided a probe comprising an isolated sphingolipid binding domain (SBD) polypeptide, wherein the isolated SBD polypeptide is capable of binding to a sphingolipid, and methods and uses relating to such a probe.

Abstract: Provided is a memory mapping method, and particularly provided is a nonvolatile main memory mapping method for managing a nonvolatile main memory. The nonvolatile memory mapping method includes: performing a system call in order to access a file page that is required to operate a process stored in a kernel area of a nonvolatile main memory, wherein both the file page and process are stored in the kernel area of the nonvolatile main memory; and mapping a physical address of the file page to a virtual address of a user area of the nonvolatile main memory.

Abstract: Provided is an apparatus for calibrating a transmission path, the apparatus including one or more couplers to separate, by one or more paths, one or more input signals input from an input terminal of one or more antennas, a power detector to detect amplitude of one or more path signals separated by the one or more paths, a power distributor to distribute any one of the one or more path signals, one or more mixers to mix a distribution signal distributed by the power distributor with the one or more path signals, a low-pass filter to remove a high-frequency component of a mixed signal mixed by the one or more mixers; and a voltage detector to detect amplitude of one or more filter pass signals with the high-frequency component removed.