2038results about How to "Effective blocking" patented technology

A device and method of using the device for contraception or sterilization and particularly for reversible contraception by occluding a reproductive lumen to prevent the passage of reproductive cells through the lumen for a desired period of time until the patient wishes to become fertile again and then be reopened. The occluding member preferably comprises a tubular framework formed from a shape memory material configured to be implanted in a reproductive lumen. The occluding member is implanted within a body lumen, secured to the wall of the reproductive lumen and then collapsed to collapse the wall and occlude the lumen. Alternatively, the occluding member may be collapsed upon a solid plug. The closure of the reproductive lumen may be reversed by introducing a balloon catheter and by a series of inflations of the balloon reexpanding the collapsed occluding member or by removing the plug. The occluding member and the plug may be configured to facilitate endothelialization, to provoke an inflammatory responses or to deliver a drug.

A potting training device for preventing a potty-training child's urine stream from passing through the opening formed between the toilet seat and the toilet bowl. The device is made of a flexible, water-resistant, preferably non-porous sheet material, having a folding seam separating a urine-deflecting surface and a plurality of attachment tabs. An adhesive material is applied to the surface of each attachment tab and attaches the attachment tabs to the underside of the toilet seat. The sheet material, in its unattached flat configuration, is manipulated into a curved configuration that matches the curvature of the toilet seat, and is attached thereto. The potty training device is also not visible to the observer unless the toilet seat is lifted up, in a vertical position or viewed from a position to the rear of the attachment point when the toilet seat is down.

A method to control switching of telephone calls of at least one caller with at least one more callee using a filter is—regarding a filtering that is as efficient as possible with a minimum impact on the regular phone operation—designed in such a way that before switching the telephone call to the callee, a test is performed by the filter to identify the telephone calling behavior of the caller.

A linear light-emitting diode (LED)-based solid-state universal lamp using an all-in-one LED driving circuit with a power factor correction (PFC) and control device operates normally for a regulated power and current from either electronic ballast or AC mains. The all-in-one LED driving circuit is configured to operate in a wide range of input voltages and frequencies, especially for various high voltages and high frequencies associated with various electronic ballasts. With a cycle-by-cycle current control and power switching at a constant on-time and varied off-time, an over-rated surge current is limited, preventing occasional fire hazards occurred in the ballast. When two shock protection switches are used in two lamp bases in the lamp, the universal lamp fully protects a person from possible electric shock during initial installation and re-lamping.

The invention discloses a high-efficiency plugging oil-base drilling fluid and a preparation method thereof. The drilling fluid is prepared from the following raw materials in parts by mass: 70-80 parts of slurrying oil, 20-30 parts of slurrying water, 2.5-3.0 parts of main emulsifier, 1.5-2.0 parts of auxiliary emulsifier, 2.0-2.5 parts of wetting agent, 2.0-2.5 parts of flow pattern regulator, 2.5-3.0 parts of fluid loss agent, 1.5-2.0 parts of alkalinity regulator, 0.5-0.8 part of extracting agent and 7-9 parts of plugging material. A weighting material is added so that the density of the drilling fluid reaches 1.45-1.56 g / cm<3>. By utilizing the well-drilling positive differential pressure, the high-efficiency plugging oil-base drilling fluid quickly implements bridging, filling and filming to plug the formation fractures on the well wall surface and near the well wall, effectively prevents the drilling fluid and filtrate thereof from permeating into microfractures, enhances the bearing capacity of the formation, has favorable plugging effect, and is beneficial to the stability of the well wall.

The invention discloses a W / O / W type active viscous oil blocking agent. The blocking agent comprises internal phase water, viscous oil and external phase water. A nonionic surfactant is adopted between the internal phase water and the viscous oil. An ionic surfactant is adopted between the viscous oil and the external phase water. According to the invention, a W / O / W composite structure is adopted, W / O with a relatively large viscosity is coated by the external phase water layer, such that defects in prior arts of high viscosity, high construction pressure and poor selectivity upon an oil-water layer during an active viscous oil blocking agent injection process are overcome. With the blocking agent provided by the invention, the ground fluidity is good, and the injection pressure is low. When the blocking agent enters the stratum, the emulsion is demulsified, and W / O emulsion with a high viscosity is released, such that oil well water exits can be effectively blocked, and defects of existing active viscous oil blocking agents are overcome. The technical scheme provided by the invention is especially suitable for technical features of offshore oilfields.

A linear light-emitting diode (LED)-based solid-state universal lamp using an all-in-one LED driving circuit with a power factor correction (PFC) and control device operates normally for a regulated power and current from either electronic ballast or AC mains. The all-in-one LED driving circuit is configured to operate in a wide range of input voltages and frequencies, especially for various high voltages and high frequencies associated with various electronic ballasts. With a cycle-by-cycle current control and power switching at a constant on-time and varied off-time, an over-rated surge current is limited, preventing occasional fire hazards occurred in the ballast. When two shock protection switches are used in two lamp bases in the lamp, the universal lamp fully protects a person from possible electric shock during initial installation and re-lamping.

The invention relates to polymer microspheres for in-depth reservoir oil displacement and profile control and a preparation method thereof. In the method, based on the method that photopolymerization is used to prepare the polymer, water-soluble anionic monomer is used and acrylamide monomer water solution, dispersant and crosslinking agent are added to form oil-water mixed emulsion in the mixed medium of surfactant and solvent, then initiator is decomposed by ultraviolet through photopolymerization under controllable temperature so as to initiate emulsion polymerization and 50-500nm of microspheres are formed. The polymer microspheres material prepared by the invention can be used in various environmental conditions and is characterized of safe and stable reaction system, simple and convenient operation, flexible and controllable reaction process and time, high production efficiency, low energy consumption, non-pollution and the like. The invention utilizes the ability of microspheres that microspheres can be dispersed in arbitrary concentration and injected in the water and can gradually swell after entering in depth of the formation to plug the pore throat so as to effectively plug the high permeable strip of the formation, expand the water swept volume and significantly increase crude oil recovery of water flooding reservoir.

A method in a computer system for generating an efficient item assortment associated with a plurality of items includes obtaining choice set data specifying a multiplicity of choice sets associated with the plurality of items, where each of the multiplicity of choice sets includes several of the plurality of items, at least some of which are mutually substitutable, obtaining item interaction data descriptive of substitutions between pairs of items in each of the multiplicity of choice sets, obtaining a set of benefit metrics associated with the plurality of items, obtaining a constraint parameter associated with the item assortment, and generating an item selection based at least on the item interaction data, the set of benefit metrics, and the constraint parameter, where the item selection identifies at least one of the plurality of items selected for inclusion in the item assortment.

Disclosed is a semiconductor device including plural types of semiconductor elements having structures that have respective thicknesses suitable for their uses formed in the same process. A semiconductor device (100) includes a TFT (40) and a photodiode (50). A gate electrode (110) of the TFT (40) and a light-shielding layer (60) of the photodiode (50) are formed in the same process. However, because the film thickness of the gate electrode (110) is small, the breakage of an island-shaped silicon layer (120), which will be the channel layer, at the edge of the gate electrode (110) can be prevented. Also, because the film thickness of the light-shielding layer (60) is large, the light entering through a surface of a glass substrate (101) on the side opposite from the surface on which the TFT is formed can be reliably blocked by the light-shielding layer (60). Consequently, the detection sensitivity of the photodiode (50) can be increased.

A device for occluding a body lumen, and particularly contraceptive or sterilization device for occluding a reproductive tract or lumen to prevent the passage of reproductive cells through the tract or lumen, generally comprising a tubular member, and a mesh member, transversely disposed on the tubular member lumen. The mesh member is permeable to allow for tissue ingrowth, which produces a tissue impregnated mesh occluding the body lumen. The occluding device of the invention can be used in the fallopian tubes of a female patient, the vas deferens of a male patient, or other body lumen.

Apparatus is provided including an assembly (22) and a control unit (36). The assembly (22) includes a housing (34) configured to be applied to a nerve (20) of a subject, and at least one cathode (30) and at least one Peltier cooler (32), which are fixed to the housing (34). The control unit (36) is configured to drive the cathode (30) to apply an activating current to the nerve (20) that generates action potentials traveling in first and second directions (38 and 40) in the nerve (20), and the Peltier cooler (32) to cool the nerve (20) sufficiently to block propagation of at least a portion of the cathode-generated action potentials traveling in the second direction (40). Other embodiments are also described.

The present invention generally relates to a system for blocking spam mail and a method of the same, and the system in accordance with the present invention, comprising: a Mail transceiver receiving the e-mail, temporarily storing the e-mail in a temporary storage for a set time after authentication mail is transmitted, and deleting the e-mail it a sender's response is not received within the set time, then transmitting the temporarily stored e-mail to mail accounts of recipients of a mail server if the sender's response is received within the set time; an authenticator list classifying and storing, according to each recipient, an e-mail address of the sender authenticated through the authentication mail and an e-mail address of a random sender registered by the recipients of the e-mail to receive the e-mail without authentication; and an authentication processor retrieving whether the e-mail address of the sender is included in the authenticator list, sending the authentication mail to the e-mail address of the sender if the e-mail address of the sender is not included in the authenticator list, and authenticating the sender according to the sender's access and response for the authentication mail.