Abstract: The present technology relates to a wireless communication apparatus and method by which communication can be performed with a higher efficiency. The wireless communication apparatus includes a preamble generation section that generates a preamble that is to be deployed at the top of a transmission frame and includes header information, a midamble generation section that generates a midamble that is to be deployed in the middle of the transmission frame and includes information of at least part of the header information, and a wireless transmission processing section that transmits the transmission frame including the preamble and the midamble. The present technology can be applied to a wireless communication apparatus.

Abstract: A conjugate fiber-containing yarn containing side-by-side or eccentric core-in-sheath conjugate fibers each composed of a polyester component and a polyamide component, that can be crimped by heating, and that has properties of increasing its crimp ratio when it absorbs moisture or water and is excellent in windbreaking and warmth-retaining properties, has a wool-like soft and bulky hand, and is capable of forming a fabric in which a see-through property is not increased even when wetted with water.

Abstract: A composite fiber is described which comprises a polyester component and a polyamide component bound in a side-by-side or eccentric core-in-sheath structure, exhibiting a percentage of crimp DC of 1.3-15.0% after the composite fiber is treated in boiling water for 30 minutes under a load of 1.76×10?3 cN/dtex, and then dry heat treated for 30 minutes at 100° C. under a load of 1.76×10?3 cN/dtex, for stabilization of the crimps and further dry heat treated for one minute at 160° C. under a load of 1.76×10?3 cN/dtex, as well as a percentage of crimp HC of 0.5-10% after immersion in water at 20-30° C. for 10 hours, and a difference ?C of 0.5-7.0% between the percentage of crimps.

Abstract: A compression molded product of effervescent chlorinated isocyanuric acid, comprising (a) chlorinated isocyanuric acid, (b) organic acid, (c) carbonate salt and (d) sodium sulfate.

Abstract: A conjugate fiber-containing yarn containing side-by-side or eccentric core-in-sheath conjugate fibers each composed of a polyester component and a polyamide component, that can be crimped by heating, and that has properties of increasing its crimp ratio when it absorbs moisture or water and is excellent in windbreaking and warmth-retaining properties, has a wool-like soft and bulky hand, and is capable of forming a fabric in which a see-through property is not increased even when wetted with water.

Abstract: A composite fiber which expresses crimping and whose percentage of crimp varies reversibly in response to humidity, which maintains excellent variation properties in percentage of crimp even after the processes of dyeing and finishing, and which is highly practical and can easily yield comfortable fabrics with reduced stuffy feeling. The composite fiber comprises a polyester component and a polyamide component bound in a side-by-side or eccentric core-in-sheath structure, exhibiting a percentage of crimp DC of 1.3-15.0% after the composite fiber is treated in boiling water for 30 minutes under a load of 1.76×10?3 cN/dtex, and then dry heat treated for 30 minutes at 100° C. under a load of 1.76×10?3 cN/dtex for stabilization of the crimps and further dry heat treated for one minute at 160° C. under a load of 1.76×10?3 cN/dtex, as well as a percentage of crimp HC of 0.5-10% after immersion in water at 20-30° C. for 10 hours, and a difference ?C of 0.5-7.0% between the percentage of crimps.

Abstract: A woven or knit fabric containing crimped composite fibers having its air permeability enhanced by water wetting and being useful in clothes such as outerwear, which woven or knit fabric contains 10 to 100 mass % of composite fibers of side-by-side type or eccentric core sheath type composed of polyester resin component and polyamide resin component whose thermal shrinkages are different from each other, the composite fibers having crimps developed by heat treatment. The composite fibers exhibit humid crimp factor HCF (%), as measured through a procedure comprising immersing the same in water of 30° C. for 2 hr, pulling them up, interposing them between a pair of filter papers at 30° C. in a humidity of 90% RH within 60 sec of the pulling up and applying a pressure of 0.69 mN/cm2 for 5 sec, of ?10% lower than the dry crimp factor DCF (%) after dying by allowing them to stand still at 20° C.

Abstract: A woven or knitted fabric with a air space which is reversibly decreased by wetting with water compared to its dry state, comprises crimped filaments A whose percentage of crimp decreases upon wetting with water, and filaments B selected from among filaments with no crimps and crimped filaments which undergo substantially no change in percentage of crimp upon wetting with water, wherein the difference between the dry percentage of crimp DCf(%) and the wet percentage of crimp (HCf) (DCf?HCf) of a crimped filament A taken from the woven or knitted fabric is at least 10%, and the average value RA between the change in dimensions RP(%) of the woven or knitted fabric in the warp (or wale) direction when wet and when dry, and the change in dimensions RF(%) in the weft (or course) direction when wet and when dry (=(RP?RF)/2)(%) is at least 5%.

Abstract: A woven or knitted fabric, having a roughness which is manifested when wetted with water and disappears when dried, comprises crimped filaments A whose percentage of crimp decrease when wetted with water, and filaments B composed of non-crimped filaments and/or crimped filaments which undergo substantially no change in percentage of crimp when wetted with water, wherein the change of the roughness is 5% or more, determined in accordance with the following equation: Change in Roughness (%)=((TW?TD)/TD)×100 in which TD: a thickness upon drying and TW: a thickness upon wetting with water, of the woven or knitted fabric.

Abstract: A polyether ester elastic fiber comprising a polyether ester elastomer containing polybutylene terephthalate as a hard segment and polyoxyethylene glycol as a soft segment and copolymerized with a specific metal organic sulfonate, having a coefficient of moisture absorption of not less than 5% at 35° C. and at a RH of 95% and a coefficient of water absorption extension of not less than 10%. The above-mentioned polyether ester elastic fiber has a good moisture-absorbing property, and is reversibly largely expanded or contracted by the absorption or release of water. Therefore, a fabric giving excellent comfortableness can be obtained from said elastic fibers, and can be recycled.

Abstract: A compression molded product of quick-dissolving chlorinated isocyanuric acid, comprising: (a) trichloroisocyanuric acid, (b) sodium dichloroisocyanurate anhydrous salt, (c) magnesium sulfate and/or aluminum sulfate, and (d) calcium carbonate.

Abstract: A compression molded product of effervescent chlorinated isocyanuric acid, comprising (a) chlorinated isocyanuric acid, (b) organic acid, (c) carbonate salt and (d) sodium sulfate.

Abstract: A compression molded product of quick-dissolving chlorinated isocyanuric acid, comprising: