Abstract: An apparatus, including: a clock source configured to generate a local oscillator (LO) clock signal; a radio frequency digital-to-analog converter (RF DAC) configured to generate a radio frequency (RF) signal based on a data signal and the LO clock signal; and an idle data detector configured to: detect a stream of idle data in the data signal; and disable providing the LO clock signal to at least a portion of the RF DAC in response to detecting the stream of idle data.

Abstract: An apparatus including: a transmitter output impedance matching circuit including an inductive element; a low noise amplifier (LNA) including a first field effect transistor (PET); a receiver input impedance matching circuit, including: a transformer including a first winding and a second winding; and a capacitor coupled in series with the first winding between a first end of the inductive element and a gate of the first FET, wherein the second winding is coupled to a second end of the inductive element; and a radio frequency (RF) port coupled between the first end of the inductive element and the capacitor.

Abstract: A fastening device includes at least one base portion and at least one fastener portion. The base portion is connected to a first object and the fastener portion is slidably assembled to the base portion. The fastener portion cooperates with the base portion to provide a locking and an unlocking function for connecting or disconnecting a second object to or from the base portion. With these arrangements, two objects can be repeatedly and quickly connected to or disconnected from each other.

Abstract: A positioning device includes a body. The body is adapted to be disposed on a first object. The first positioning member is movably connected to the body or a second positioning member. The second positioning member is movably connected to the body or the first positioning member, and the first positioning member is located between the second positioning member and the first object. The present disclosure further provides a method of use of a positioning device.

Abstract: A fastening device includes at least one base portion and at least one fastener portion. The base portion is connected to a first object and the fastener portion is slidably assembled to the base portion. The fastener portion cooperates with the base portion to provide a locking and an unlocking function for connecting or disconnecting a second object to or from the base portion. With these arrangements, two objects can be repeatedly and quickly connected to or disconnected from each other.

Abstract: A system, method and software product for simulating fracture propagation in brittle materials is disclosed. Using the fracture energy release rates and the critical separations of the three fundamental fracture modes obtained independently from experiments, and a user defined normalized curve representing the traction-separation law, the present invention simulates the fracture propagation in a non-linear dynamic analysis. By using either dimensional or dimensionless effective separation approach, the actual tractions are calculated at each solution cycle based on user's choice. In addition, loading, unloading and reloading conditions are also continuously traced to ensure the proper constitutive equations are used. Three fracture modes are seamlessly mixed and integrated.

Abstract: A system, method and software product to simulate guided cable contacts is disclosed. The guided cable contact includes a slave node and an associated beam. A normal vector is established between the slave node's projection point and the slave node. Each of the slave node and two end nodes of the beam has three translational degrees-of-freedom. A spring is placed between the slave node's projection point and the slave node. The spring constant is assigned such that the spring is substantially stiffer than that of the beam. The guided cable contact stiffness matrix is then calculated using the spring constant, the normal vector, the length of the beam, and the distance between the first end node of the beam and the projection point. According to one aspect, the guided cable contact may be used for modeling human spinal column.