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Method and management agent for event notifications correlation

Methods and apparatus for correlating event notifications between agents in a management network are provided. An agent constructs a network notification in response to receiving an event notification. If the received event notification is associated with a prior notification already received and stored by the agent, a correlation attribute is added to the constructed network notification. If the received notification matches a peer agent notification category that another agent in the management network is interested in receiving, the constructed network notification is sent to the other agent.




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Computation device and computation execution method

A computation device includes a data path element (300) including a function processing unit (4000) that executes a computation specified in a function using input data included in an event (1000) as an argument; and a control path element (2000) that detects the event (1000) by use of a return value (ret) of the function. The function processing unit (4000) includes a data calculation unit (4001) that executes a computation and outputs a first result (d0); and a control comparison unit (4002) that outputs, to the control path element (2000), a result of comparison between the input data and data for specifying the event (1000), as the return value (ret).




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Apparatus and method for supporting suspend of composite network device

An apparatus and a method support a selective suspend mode in a driver for any one of at least two devices constituting a composite network device. When a device of the driver requests suspend mode transition, a Physical Device Object (PDO) constituting a driver of the composite network device is identified by a PDO check part. A suspend mode transition request information of the device is sent to an operating system through the PDO. When the operating system allows the suspend mode transition, a control part sends suspend mode transition indication information to the device through the PDO.




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Systems and methods for application reuse

System and methods are provided. In one embodiment, a system includes a master data archiver configured to store a data related to a turbomachine system and a first data collector service system configured to collect the data from the master data archiver. The system also includes a second data collector service system communicatively coupled to the first data collector system and configured to pull or to push the data from the first data collector system and a first data archiver configured to receive at least some of the data from the second data collector system. The system further includes an asset model database storing a plurality of turbomachine tags, wherein the turbomachine tags are configured to categorize the data and a data access system (DAS) configured to provide data access to the first data archiver, the asset model database, or a combination thereof.




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System and method to boost application performance by using a proxy for executing synchronous application programming interface calls

Techniques are described for utilizing synchronous APIs which normally block callers until a result is returned. In particular, the techniques described herein enable an application or other programming construct to boost performance by executing synchronous APIs (e.g., long running time APIs) within a proxy container rather than executing the synchronous APIs in the context of the application itself. Since the proxy is a separate process or thread, the caller application is thereby released from waiting for the synchronous API call and may proceed with other processing instead of waiting for the synchronous API to return. The application may then monitor the proxy to determine whether a result has been received, such as by periodically polling the proxy.




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Information processing apparatus, method and program for writing file system metadata of plural operating systems

An information processing apparatus includes a transmission unit transmitting a command of a second operating system to the second operating system when receiving the command via a communication path which communicates under a control based on a first operating system, an extraction unit extracting data for the second operating system by analyzing the command transmitted from the transmission unit, and a writing unit writing the data extracted by the extraction unit as data constituting file system metadata of the second operating system.




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Methods and systems for dynamically establishing one or more connections between a software application and a cluster of message broker

An exemplary method includes a broker-based messaging system detecting a request provided by a software application for the software application to connect to any one of a plurality of brokers included in a cluster of brokers, dynamically identifying, in response to the request and in accordance with a connection distribution heuristic, a broker included in the cluster of brokers and that is available for connection to the software application, and attempting to establish a connection between the software application and the broker. Corresponding methods and systems are also disclosed.




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System and method for event-driven live migration of multi-process applications

A system, method, and computer readable medium for asynchronous live migration of applications between two or more servers. The computer readable medium includes computer-executable instructions for execution by a processing system. Primary applications runs on primary hosts and one or more replicated instances of each primary application run on one or more backup hosts. Asynchronous live migration is provided through a combination of process replication, logging, barrier synchronization, checkpointing, reliable messaging and message playback. The live migration is transparent to the application and requires no modification to the application, operating system, networking stack or libraries.




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Preparation method of superabsorbent polymer

The present invention relates to a preparation method of a superabsorbent polymer, and specifically to a method of preparing a superabsorbent polymer including the steps of: preparing a hydrous gel phase polymer by thermal polymerizing or photo-polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying the hydrous gel phase polymer; milling the dried polymer; classifying the milled hydrous gel phase polymer into two or more grades by particle size; adding a surface cross-linking agent to each hydrous gel phase polymer classified into two or more grades; and carrying out a surface cross-linking reaction of the hydrous gel phase polymer to which the surface cross-linking agent is added.




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Method for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution

A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a surrounding gas phase in a reaction chamber, wherein the monomer solution is metered into the reaction chamber via at least one bore, and the diameter is from 210 to 290 μm per bore and the metering rate is from 0.9 to 5 kg/h per bore.




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Supported metallocene catalyst, method for preparing the same and method for preparing polyolefin using the same

Provided are a supported metallocene catalyst, a method for preparing the same and a method for preparing polyolefin using the same. The supported metallocene catalyst prepared by incorporating a metallocene compound having a ligand substituted with alkoxide or aryloxide into a conventional supported metallocene catalyst and incorporating a borate compound as a second co-catalyst exhibits considerably superior catalyst activity and easily controls molecular weight distribution, as compared to the conventional metallocene-supported catalyst.




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Polyurethane (meth) acrylates using modified hydroxythiols

The invention provides intermediates of the formula: as well as a method of their preparation by reacting a thiol having at least two hydroxyl groups with a mono-unsaturated organic compound in the presence of a base catalyst. A polymerizable urethane acrylate oligomer or urethane methacrylate oligomer is formed by reacting a polyisocyanate with the intermediate. The polymerizable urethane acrylate oligomer or urethane methacrylate is blended with a polymerization initiator to form a composition which is useful in such applications as adhesives.




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Pattern-forming method, and radiation-sensitive composition

A pattern-forming method includes providing a resist film on a substrate using a radiation-sensitive composition. The resist film is exposed. The exposed resist film is developed using a developer solution. The developer solution includes no less than 80% by mass of an organic solvent. The radiation-sensitive composition includes at least two components including a first polymer and a radiation-sensitive acid generator. The first polymer includes a structural unit having an acid-labile group. One or more components of the radiation-sensitive composition have a group represented by a formula (1). A− represents —N−—SO2—RD, —COO−, —O− or —SO3−. —SO3− does not directly bond to a carbon atom having a fluorine atom. RD represents a linear or branched monovalent hydrocarbon group, or the like. X+ represents an onium cation. —A−X+ (1)




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Solid catalyst for the polymerization of propylene, and method for preparing same

Provided are a solid catalyst for propylene polymerization and a method for preparing the same, specifically a solid catalyst for propylene polymerization which does not contain any environmentally harmful material and can produce a polypropylene having excellent stereoregularity with a high production yield, and a method for preparing the catalyst.




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Hydrogenated petroleum resin pellet production method

After a cyclopentadiene compound and a vinyl aromatic compound are thermally polymerized, the obtained copolymer is subjected to a hydrogenation reaction to form a hydrogenated product. After most of the hydrogenation solvent is separated by a solvent evaporation tank from the hydrogenated product, an additive separately prepared by dissolving an antioxidant is added to the hydrogenated product to form a mixture. While the hydrogenation solvent is a naphthenic solvent, the additive is prepared by dissolving the antioxidant in an aromatic additive solvent having the same carbon atoms as those of the hydrogenation solvent. Then, the low-molecular-weight component as well as the remaining hydrogenation solution and the additive solvent are separated by a thin-film evaporator from the mixture. The obtained molten resin is pelletized to produce hydrogenated petroleum resin pellets. The time for uniformly blending the antioxidant can be shortened.




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Polymer compositions and methods of making and using same

A polymer reactor-blend comprising at least a first component having a polydispersity index of greater than about 20 and is present in an amount of from about 1 wt. % to about 99 wt. % based on the total weight of the polymer and a second component having a polydispersity index of less than about 20 and is present in an amount of from about 1 wt. % to about 99 wt. % based on the total weight of the polymer wherein a molecular weight distribution of the second component lies within a molecular weight distribution of the first component.




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Method for manufacturing acrylic acid-based polymer and use for same

The present invention relates to a production method for efficiently obtaining an acrylic acid-based polymer having a narrow molecular mass distribution and a low molecular mass, without using a large amount of chain transfer agent. A method for continuously producing an acrylic acid-based polymer obtained by continuously polymerizing a monomer having acrylic acid as an essential component, characterized in that a liquid feed pump applies a mechanical load of 0.5 to 2.5 kJ/L to the liquid discharged from the outlet of a reactor. An acrylic acid-based polymer having fewer high-molecular-mass components, excellent dispersion and other properties, and a low molecular mass is thereby obtained.




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Fluorine and epoxy group-containing copolymer, and method for producing same

Provided is a fluorine- and epoxy group-containing copolymer with excellent workability at room temperature, high water-repellency, and excellent characteristics as a water vapor barrier. Also provided is an efficient method for producing said copolymer. The fluorine and epoxy group-containing copolymer is characterized by containing at least a monomer unit represented by general formula (1): {Therein, R1-R10 each independently represent an alkyl group having 1-3 carbon atoms or a hydrogen atom, R11 is a hydrogen atom, methyl group, or phenyl group, and R5 or R6 can be linked with R7 or R8 to form a ring.} and a monomer unit represented by general formula (2): {Therein, R12 and R13 each independently represent a hydrogen atom or a fluorine atom; R14 represents a hydrogen atom, fluorine atom, methyl group or trifluoromethyl group, and R15 represents a flourine atom or perfluoro group having at most 12 carbon atoms}.




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Polymerization initiating system and method to produce highly reactive olefin functional polymers

A method for producing highly reactive olefin polymers wherein at least 50 mol. % of the polymer chains have terminal double bonds, and a novel polymerization initiating system for accomplishing same.




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Diene polymer and production method thereof

The present invention provides a diene polymer in which a polar functional group is introduced into an end by radical polymerization, and its production method; a polymer emulsion and a rubber composition each containing the diene polymer; and a pneumatic tire containing the rubber composition. The present invention relates to a diene polymer, which is obtained by radical polymerization of at least one radical polymerizable monomer in the presence of at least one polar functional group-containing thiol compound, and has a polar functional group at at least one end: The polar functional group-containing thiol compound is preferably represented by formula (1): X—R1—SH (1) wherein X represents an ester group, a hydroxyl group, a carboxyl group, an amino group, or an alkoxysilyl group, and R1 represents an alkylene or arylene group which may have a substituent.




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Water/oil repellent composition, method for its production and article

To provide a water/oil repellent composition which can impart sufficient post-air-drying water/oil repellency to the surface of an article, and which presents a low environmental impact, and an article having its surface treated with the water/oil repellent composition. A water/oil repellent composition comprising a copolymer (A) having structural units based on a monomer (a), structural units based on a monomer (b), structural units based on a monomer (c) and/or structural units based on a monomer (d); and an aqueous medium (B) containing water, and a film-forming assistant (x) and/or a film-forming assistant (y). Monomer (a): a monomer having a C1-6 polyfluoroalkyl group, monomer (b): vinylidene chloride, monomer (c): a monomer, the homopolymer of which has a glass transition temperature of at least 20° C., monomer (d): a monomer having a crosslinkable functional group, film-forming assistant (x): a specific amide solvent, and film-forming assistant (y): a specific glycol solvent.




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Catalyst systems containing a bridged metallocene

The present invention provides polymerization processes utilizing a catalyst system containing an ansa-metallocene and a second metallocene compound for the production of olefin polymers.




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Bridged metallocene catalyst systems with switchable hydrogen and comonomer effects

The present invention provides polymerization processes utilizing an ansa-metallocene catalyst system for the production of olefin polymers. Polymers produced from the polymerization processes have properties that vary based upon the presence or the absence of hydrogen and/or comonomer in the polymerization process.




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Expandable TFE copolymers, methods of making, and porous, expanded articles thereof

A true tetrafluoroethylene (TFE) copolymer of the fine powder type is provided, wherein the copolymer contains polymerized comonomer units of at least one comonomer other than TFE in concentrations of at least or exceeding 1.0 weight percent, and which can exceed 5.0 weight percent, wherein the copolymer is expandable, that is, the copolymer may be expanded to produce strong, useful, expanded TFE copolymeric articles having a microstructure of nodes interconnected by fibrils. Articles made from the expandable copolymer may include tapes, membranes, films, fibers, and are suitable in a variety of end applications, including medical devices.




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Direct CH arylation method using palladium-based catalyst

A method for producing a copolymer includes reacting a first monomer with a second monomer using a Pd-based catalyst, wherein the first monomer is a first hetero cyclic compound which includes a first hetero atom selected from S, N, and O, the first hetero cyclic compound in which a carbon atom adjacent to the first hetero atom is coupled with at least one hydrogen atom, and the second monomer is a second hetero cyclic compound which includes a second hetero atom selected from S, N, and O, the second hetero cyclic compound in which the second hetero atom is coupled with a carbon atom in which a halogen group selected from Br, Cl, and I is substituted.




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Method for preparation of platinum-carbonyl-siloxane compounds

The invention relates to a method for preparation of platinum siloxane compounds containing at least one CO ligand molecule (Pt carbonyl siloxanes). The method comprises reacting gaseous carbon monoxide (CO) with a platinum siloxane compound, preferably a platinum vinyl-cyclosiloxane compound, in solution with an organic solvent. The method is straightforward and applicable to industrial scale. With this method, specific isomers of platinum carbonyl vinylcyclosiloxanes are prepared, in which the two η-2-ethenyl groups coordinated to the Pt atom are bonded in trans-configuration relative to the cyclosiloxane backbone. The Pt compounds obtained by the method are used as catalysts for hydrosilylation and for crosslinking and curing of siloxanes and silanes.




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Methods of constructing a pump island protector, and a pump island protector formed by such methods

A method of constructing a pump island protector to alleviate continuous maintenance required for a deteriorating existing steel pump island base, and a pump island protector constructed by the method. Using an adjustable form system and the combination of stainless steel members and new concrete, the existing pump island is re-wrapped with the stainless steel member and the new concrete.




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Methods of constructing a pump island protector, and a pump island protector formed by such methods

A method of constructing a pump island protector to alleviate continuous maintenance required for a deteriorating existing steel pump island base, and a pump island protector constructed by the method. Using an adjustable form system and the combination of stainless steel members and new concrete, the existing pump island is re-wrapped with the stainless steel member and the new concrete.




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Auxiliary member for pavement construction, concrete slab and method for pavement construction

An auxiliary member for pavement construction, including: a cylinder, a base plate and a leveling bolt; the cylinder includes a first cylinder part and a second cylinder part which are connected and communicated with each other, the first cylinder part is provided with a sling installing member and a slurry inlet, bottom of the second cylinder part is connected with the base plate, the base plate is provided with a bolt extending hole and multiple slurry discharging holes which are communicated with the inner cavity of the second cylinder part, the leveling bolt includes a bolt head and a screw, the screw extends through the bolt extending hole, the bolt head is arranged in the second cylinder part and the bolt head is smaller than the inner diameter of the second cylinder part. The present invention further provides a concrete slab and a method for pavement construction.




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Storm grate lock device and method of use

A storm grate locking device and method of use with a lock body. The lock body has at least one hook arm engaged with a latch assembly, a security flange nut engaged with the latch assembly, and a deep well socket. When the lock body is placed into the recessed area of a storm grate; and the hook arm engaged with the latch assembly may be extended to extend under the storm grate thereby preventing removal of the storm grate by rotating the security flange nut.




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Method for laying down a pavement, a screed and a road paver

A method for laying down a pavement in which a compaction unit such as a tamper pre-compacts the paving material with a selectable stroke and at a selectable frequency while the pavement having a selectable pavement thickness is in the process of being laid down at a selectable paving speed, the stroke of the compaction unit is automatically adjustable in response to paving parameters, such as the paving speed and/or the pavement thickness, along a characteristic curve or in a characteristic map. The compaction unit includes an adjusting mechanism which is operable during the paving operation for adjusting the stroke of the compaction unit.




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Systems for converting an existing traffic intersection into an intersection having a roundabout, and related methods

A system for converting an existing traffic intersection into an intersection having a roundabout traffic control feature includes a center island framework, one or more splitter island frameworks, and one or more diverter frameworks. The frameworks are secured to the road surface, and fill material is added to free spaces defined in the frameworks to thereby form a center island, one or more splitter islands, and one or more diverters. The system allows a roundabout to be implemented into an existing intersection on a temporary or semi-permanent basis, in a minimal amount of time and without requiring significant construction at the site of the intersection.




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Systems and methods for aiming asphalt material feed sensors

A system for measuring the height of paving material distributed by an auger of a paving machine in front of a grading implement, such as a screed, is disclosed. The system includes a sonic sensor and a laser pointer. The sonic sensor generates a sonic signal which is directed at the paving material distributed by the auger. The laser pointer generates a laser beam which is similarly directed at the paving material that has been distributed by the auger. The laser beam and the sonic signal meet at a common position on the paving material.




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Methods for installing a bounded paving system

A method for installing a paver system includes positioning a first grid substrate adjacent to a second grid substrate, the first and second grid substrates form a paver support surface. At least the first grid substrate includes an integrated boundary ridge extending along the first paver support surface. The first grid substrate is interlocked with the second grid substrate with a first paver piece bridging the first and second grid substrates to form a paver linkage. Movement of at least the first paver piece is arrested beyond the integrated boundary ridge by directly or indirectly engaging at least the first paver piece against the integrated boundary ridge. In another example, movement of the first paver piece is arrested by anchoring at least the first paver piece on the first and second paver support surfaces through distribution of forces incident on at least the first paver piece through the paver linkage.




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Method and system for applying a road surface

A method and a system for applying a road surface using a mixing plant for producing laying material, a road finishing machine processing the laying material to a road surface, and a supply chain transporting the laying material from the mixing plant to the road finishing machine. Request commands are transmitted from the road finishing machine to the mixing plant and/or to the supply chain, and, depending on these request commands, the production rate of the laying material in the mixing plant, the temperature of the laying material produced in the mixing plant, and/or the mass flow of laying material supplied to the road finishing machine per time unit by means of the supply chain are adjusted.




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Enhanced strength manhole cover assembly and fabrication method

A manhole cover assembly includes a manhole structure, a manhole frame carried by the manhole structure and a manhole frame grout cementing the manhole frame to the manhole structure. The manhole frame grout includes a grout mixture having an epoxy resin, a curing agent and an aggregate. The epoxy resin and the aggregate are present in the grout mixture in an epoxy resin:aggregate weight ratio of about 0.09. A removable manhole cover is carried by the manhole frame. A manhole cover assembly fabrication method is also disclosed.




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System and method for controlling an asphalt repair apparatus

The present invention provides a system and method for controlling an asphalt repair apparatus. An additional aspect of the present invention is to provide a system that may position a heater repair element adjacent a targeted asphalt surface, acquire and analyze surface and heater sensing data, and control heater output to prepare the targeted asphalt surface for repair. Further, the system may be configured to control an asphalt repair apparatus to satisfy user-defined asphalt repair requirements.




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Method of milling asphalt

In a method of milling asphalt, a relative elevation of an unmilled asphalt pavement surface adjacent to an area to be milled is sensed with respect to a milling machine body and rotatable milling drum of the milling machine. An elevation of a bottom surface of the rotatable milling drum is determined using a computer processor. Based on a map, stored in a computer memory, of a design surface specifying a design elevation of a milled surface over the area to be milled, the elevation of the milling machine body and the rotatable milling drum are automatically adjusted such that the rotatable milling drum mills the asphalt surface to the design elevation over the area to be milled.




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Compaction device and method for compacting ground

A compaction device includes at least one traveling drum rotatable about a drum shaft and having vibration exciters including unbalanced masses rotating out of phase by 180 degrees in the same direction of rotation and generating an oscillation torque about the drum shaft, and having a drive shaft running coaxial to the drum shaft for driving the vibration exciters. The drum is divided at least once and each drum part includes at least two coupled vibration exciters mounted at a distance from the drum shaft in the drum.




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Optics cleaning apparatus and method

An optics cleaning apparatus includes a buffing cloth section where the buffing cloth section includes a buffing cloth housing and a buffing cloth removal clip. A scrub pad section where the scrub pad section includes a scrub pad and a dust bush housing. And a cleaning section, where the cleaning section includes a dust brush, a reservoir section and a fluid applicator, where the fluid applicator is connected with the reservoir section and where the fluid applicator includes an air channel connected with the reservoir section and where the reservoir section includes a fluid cartridge.




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Container for a stick of a cosmetic or hygienic product having a retractable applicator element

A container (1) for a stick of a cosmetic or hygienic product, comprising an applicator element (3) in which a stick (2) of said product can move axially relative to a base (32), as well as a tubular storage element (4) comprising a top (41) that contains a mobile sleeve (42) and is suitable for covering the applicator element (3) in a configuration wherein said applicator element is fully inserted into the sleeve and connected to said top by means of an elastically compressible device having two stable axial positions relative to a hilly inserted configuration, said device comprising a resilient element (43) pushing the sleeve (42) towards the outside of the top, and, distributed between the top and the sleeve, a heart-shaped guide track (44) arranged parallel to an axial direction of the top, and a follower (45) carried by a generally axially pivoting arm (46) such as to define stable top and bottom positions allowing the applicator element to be gripped or not. The resilient element (43) is arranged between the outer wall of the sleeve (42) and the inner wall of the top (41), and the guide track and follower are arranged in a lateral space formed by the shape differences of the cross-sections of the top and the sleeve.




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Cosmetic device with thermal storage tip

A dispenser includes a thermal storage tip and a housing having a reservoir for containing a product, such as a cosmetics product or a medicinal product. The thermal storage tip comprises a material that is capable of storing and retaining thermal energy during application of the product.




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Method and apparatus for displaying home screen in mobile terminal

A method for displaying a home screen in a mobile terminal includes determining a location of the mobile terminal, determining a screen associated with the determined location among multiple screens; and setting the screen associated with the determined location as a home screen.




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TV phone apparatus and control method therefor

Wireless circuit 201 performs transmission and reception of communication data. Cameras 204 and 205 take two moving images with different parallaxes and output two pieces of moving image data. Voice input/output section 202 acquires voice and outputs voice data. CPU 206 transmits multiple pieces of moving image data and voice data via wireless circuit 201, and, when the reception quality of communication data becomes equal to or below a reference value, stops at least one of cameras 204 and 205 to stop transmission of at least one of the multiple pieces of moving image data.




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Communication system for helmeted user

A communication system for a user having a helmet including earphones and a microphone and including a two-way radio and a microphone-including unit carried by the user and connected to the two-way radio includes a sensor for sensing the presence of the user's head within the helmet. A transmitter associated with the sensor transmits a wireless signal to the microphone-including unit which enables the microphone-including unit to wirelessly receive voice-carrying signals transmitted from the helmet microphone for conductance to the two-way radio and enables the microphone-including unit to wirelessly transmit voice-carrying signals which are received by the microphone-including unit from the two-way radio to the helmet earphones. In addition, helmet-carried componentry permits the user to simultaneously communicate through the two-way radio and a bluetooth enabled cell phone.




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Mobile wireless device with multi feed point antenna and audio transducer and related methods

A mobile wireless communications device may include a portable housing, a circuit board carried by the portable housing, a wireless communications circuit carried by the circuit board, and an audio circuit carried by the circuit board. The mobile wireless communications device may further include an antenna assembly including an antenna carrier frame coupled to the circuit board and defining a cavity therein, and an antenna element carried on the antenna carrier frame and having a plurality of spaced apart signal feed points coupled to the wireless communications circuit. In addition, an audio transducer may be carried within the cavity of the antenna carrier frame and coupled to the audio circuit.




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System and method for session sweeping between devices

An improved system and method are disclosed for peer-to-peer communications. In one example, the method enables an endpoint to sweep an ongoing communication session to another endpoint by transferring session information between the endpoints.




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Display device and method for controlling the same

A display device is disclosed. The display device comprising: a display unit; a sensor unit; a storage unit; and a processor configured to: provide feedback for indicating a security on state of selected first information when selection input for selecting the first information in the security on state is detected, when a security off input for clearing security is detected in response to the feedback, obtain the fingerprint using the display unit, and convert the first information in the security on state into a security off state when the obtained fingerprint is matched with a pre-stored fingerprint, when a security maintenance input for maintaining security is detected in response to the feedback, maintain the security on state of the first information.




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Wireless station, determination apparatus, wireless communication system, determination method, and storage medium

[Problem] To provide a wireless station, a determination apparatus, a wireless communication system, a determination method, and a storage medium which can carry out appropriate interference causing control in a secondary system adaptively to an actual environment with no change in a configuration of a primary system. [Means to solve the problem] A wireless station includes a determination means to determine at least one monitoring station measuring a wireless signal, which is transmitted by the wireless station and which causes interference to another system, out of plural wireless stations of a wireless communication system to which the wireless station belongs.




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Method and apparatus for acquiring available channel information in a wireless local area network system

Methods and apparatuses for acquiring/providing available channel information using Generic Advertisement Service (GAS) protocol in a wireless local area network (WLAN) are disclosed. AP (Access Point) station has a capability to acquire information for available channels from a database using a specific protocol related to an operation within the White Space (e.g. Access Network Query Protocol (ANQP)). And, non-AP station can retrieve the information for available channels by transmitting a Generic Advertisement Service (GAS) initial request frame to the AP station, wherein the GAS initial request frame comprises an Advertisement Protocol Element whose element ID indicates the specific protocol, and receiving a GAS initial response frame comprising a White Space Map (WSM) the specific protocol. The WSM comprises one or more white space channel units, and each of the white space channel units comprises a channel number field indicating one of the available channels and a power constraint field indicating a maximum allowable power on the indicated channel.