Abstract: A high-frequency composite impactor including a high-frequency axial and a torsional impact assembly is disclosed. The high-frequency axial impact assembly includes an upper self-excited oscillation cavity, a lower self-excited oscillation cavity, an adjustment block and a lock nut. The torsional impact assembly includes an upper end cover, a reversing switch, a pendulum, a lower shell, a lower end cover, a nozzle, a connecting block and a retaining ring. The high-frequency axial impact assembly converts the flowing drilling fluid into a pulsed jet to achieve a high-frequency axial impact. The torsional impact assembly enables a torsional impact through a shunt, and finally enables a high-frequency composite impact, which can effectively reduce the stick-slip of the drill string, jump drilling and other downhole accidents. By reducing the friction between the drill string and the borehole wall, the impactor can reduce WOB loss, increase the ROP, and improve the drilling efficiency.

Abstract: Embodiments of methods and apparatus for reducing warpage of a substrate are provided herein. In some embodiments, a method for reducing warpage of a substrate includes: applying an epoxy mold over a plurality of dies on the substrate in a dispenser tool; placing the substrate on a pedestal in a curing chamber, wherein the substrate has an expected post-cure deflection in a first direction; inducing a curvature on the substrate in a direction opposite the first direction; and curing the substrate by heating the substrate in the curing chamber.

Abstract: The present invention provides a wireless communication method of an electronic device, wherein the electronic device includes a first radio and a second radio, a maximum bandwidth or a maximum. NSS supported by the first radio is different from a maximum bandwidth or a maximum NSS supported by the second radio. The wireless communication method includes the step of: using the first radio to communicate with another electronic device; determining if parameters of the electronic device satisfy a condition; and in response to the parameters of the electronic device satisfying the condition, enabling the second radio and using the second radio to communicate with the another electronic device, and disabling the first radio.

Abstract: The method for manufacturing the semiconductor structure includes: providing a substrate, and forming contact holes in the substrate; depositing a metal at a bottom of each contact hole, and performing a reverse sputtering treatment to form a metal layer; in the reverse sputtering treatment, metal atoms or metal ions are sputtered onto at least a part of a side wall of each contact hole; performing a annealing treatment, to cause the substrate reacts with the metal layer to form a metal silicide layer.

Abstract: A supported metallocene catalyst includes a carrier and a metallocene component. The carrier includes an inorganic oxide particle and an alkyl aluminoxane material. The inorganic oxide particle includes at least one inorganic oxide compound selected from the group consisting of an oxide of Group 3A and an oxide of Group 4A. The alkyl aluminoxane material includes an alkyl aluminoxane compound and an alkyl aluminum compound that is present in amount ranging from greater than 0.01 wt % to less than 14 wt % base on 100 wt % of the alkyl aluminoxane material. The metallocene component is supported on the carrier, and includes one of a metallocene compound containing a metal from Group 3B, a metallocene compound containing a metal from Group 4B, and a combination thereof. A method for preparing the supported metallocene catalyst and a method for preparing polyolefin using the supported metallocene catalyst are also disclosed.

Abstract: A package component and forming method thereof are provided. The package component includes a substrate and a conductive layer. The substrate includes a first surface. The conductive layer is disposed over the first surface. The conductive layer includes a first conductive feature and a second conductive feature. The second conductive feature covers a portion of the first conductive feature. A resistance of the second conductive feature is lower than a resistance of the first conductive feature.

Abstract: The disclosure provides a power management method. The power management method is applicable to an electronic device. The electronic device is electrically coupled to an adapter, and includes a system and a battery. The adapter has a feed power. The battery has a discharge power. The power management method of the disclosure includes: reading a power value of the battery; determining a state of the system; and discharging power to the system, when the system is in a power-on state and the power value is greater than a charging stopping value, by using the battery, and controlling, according to the discharge power and the feed power, the adapter to selectively supply power to the system. The disclosure further provides an electronic device using the power management method.

Abstract: In one embodiment, a wireless access point receives, from a mobile system, a broadcast beacon that includes a roaming notification indicating that the mobile system intends to roam to the wireless access point. The wireless access point allocates, after receiving the broadcast beacon from the mobile system, an orthogonal frequency-division multiple access resource unit for use by the mobile system. The wireless access point sends a trigger message to the mobile system that includes an indication of the orthogonal frequency-division multiple access resource unit. The wireless access point performs, after sending the trigger message, a handoff exchange with the mobile system using the orthogonal frequency-division multiple access resource unit to attach the mobile system to the wireless access point.

Abstract: The present invention provides a simpler method for sharpening a tip of an emitter. In addition, the present invention provides an emitter including a nanoneedle made of a single crystal material, an emitter including a nanowire made of a single crystal material such as hafnium carbide (HfC), both of which stably emit electrons with high efficiency, and an electron gun and an electronic device using any one of these emitters. A method for manufacturing the emitter according to an embodiment of the present invention comprises processing a single crystal material in a vacuum using a focused ion beam to form an end of the single crystal material, through which electrons are to be emitted, into a tapered shape, wherein the processing is performed in an environment in which a periphery of the single crystal material fixed to a support is opened.

Abstract: Provided are a marker gene for identifying and classifying dopaminergic precursor cells (DPC), a screening method therefor and use thereof. The marker gene is a combination of 12 genes having specific up-regulation expression in the DPC cells relative to the neural stem cells (NSCs). The screening of the marker gene is based on a high-throughput RNA sequencing technology. In the samples of the NSC cells and the DPC cells, genes of which the specific expression is significantly up-regulated in the DPC cells are detected, and by bioinformatic analysis, a group of candidate genes capable of regulating the differentiation process of neural stem cells to dopaminergic neurons are identified. The marker gene combinations provided can be used to identify and classify DPC cell products for clinical treatment and to control the quality of the DPC cell products for clinical application.

Abstract: Provided is a pure chemical induction method for photoreceptor neuron cells. A group of small molecule inhibitors are added into a serum-free basic culture medium, and pluripotent stem cells are quickly converted into photoreceptor neuron cells. In the present invention, serum is not used, and chemical small molecules are used to replace retinol, eliminating the adverse factors of serum while ensuring the operation of visual circulation required by the development of photoreceptor neurons.

Abstract: Use of a TGF-? small molecule inhibitor in the field of nerve regeneration, for in vitro regeneration and directed differentiation of a variety of nerve cells and brain-like organs. By adding the TGF-? small molecule inhibitor to a set of basal media having clear chemical compositions, pluripotent stem cells can be induced into adult cells derived from a variety of neural stem cells, and the number of induced nerve cells can be greatly increased.

Abstract: Provided herein are, inter alia, compositions that bind to a PDZ1 domain of MDA-9/Syntenin (syndecan binding protein: SDCBP), thereby inhibiting MDA-9/Syntenin activity, and methods of use of same. The compositions and methods provided herein are useful for treating cancer and preventing cancer metastasis, particularly in cancers that have increased MDA-9/Syntenin expression.

Abstract: An optical device and the prism module thereof are provided. The prism module includes a first prism, a second prism, a film and a light guide unit. The film is disposed between the first prism and the second prism. First visible light enters the first prism, passes through the film, enters the second prism, exits from the second prism, reaches the light guide unit, and is reflected to user's eyes by the light guide unit. Also, second visible light passes through the light guide and reaches user's eyes.

Abstract: An aerosol-generating device is provided, including: a cavity configured to receive an aerosol-generating article including an aerosol-forming substrate, the aerosol-forming substrate being a solid aerosol-forming substrate; and a flexible membrane arranged at an upstream end of the cavity, the flexible membrane including an opening in fluid communication with the cavity, the flexible membrane being provided at an upstream end of the aerosol-generating device, the opening being configured to serve as an air inlet for the aerosol-generating device, at least two openings being formed in the flexible membrane, the at least two openings including slits that intersect, and the at least two intersecting slits forming a central portion. A kit, an aerosol-generating system, and a method of cleaning the aerosol-generating device are also provided.

Abstract: Embodiments provide a semiconductor structure and a method for fabricating the same. The method includes: providing a substrate; forming, in the substrate, active pillars spaced and isolation layers configured to isolate the active pillars; forming, in an active pillars and an isolation layers, word line trenches extending along a first direction; and forming a first word line in the first word line trench and a second word line in the second word line trench, where opposite surfaces of the first word line form a first gate channel together with the active pillar, opposite surfaces of the second word line form a second gate channel together with the active pillar, and sum of a width of the first gate channel along the first direction and a width of the second gate channel along the first direction is greater than a perimeter of the active pillar.

Abstract: A chemical culture system and use thereof. The chemical culture system comprises a basic culture medium and a small molecule compound, and forms a serum-free culture system having a clear chemical composition. The culture medium does not use substitute serum B27 and GS21 which contain animal-derived components and are widely used currently, but uses a pure chemical molecule activation signal pathway, and uses a non-animal-derived growth factor to replace an animal-derived growth factor, and thus the composition is clear, the potential risks caused by the existence of serum and animal-derived components are avoided, and the clinical prospect of nerve cell transplantation is expanded.

Abstract: An aerosol-generating device is provided, including: a heater casing housing a heating chamber, the heating chamber configured to receive an aerosol-generating article including an aerosol-forming substrate; an air-flow tube configured to provide air to the heating chamber; and a controller configured to control operation of the aerosol-generating device, in which the heater casing, the air-flow tube, and the control element are mounted to one another and form a self-supporting component of the aerosol-generating device. A self-supporting component for an aerosol-generating device, and an aerosol-generating system including the aerosol-generating device and an aerosol-generating article, is also provided.

Abstract: A heater assembly for an aerosol-generating device is provided, including: an elongate heating chamber configured to heat an aerosol-forming substrate; and a heating element arranged around the elongate heating chamber, the elongate heating chamber having a first length and the heating element having a second length, the first length of the elongate heating chamber being greater than the second length of the heating element, such that there is a proximal distance between a proximal end of the elongate heating chamber and a proximal end of the heating element, and the proximal distance being between 0.1 millimeter and 4 millimeters. An aerosol-generating device including the heater assembly, and an aerosol-generating system including the aerosol-generating device and an aerosol-generating article, are also provided.