Author: claimsbot

1. A dental floss formed as a yarn, including a plurality of multifilament strands braided with each other in a multi-looped manner so that collectively forming a volumetric knit structure; while being stretched along a straight line, said yarn has a longitudinal axis, wherein said yarn comprises:
a plurality of quasi-flat sections sequentially disposed and twisted in relation to each other along the longitudinal axis, wherein each said quasi-flat section is characterized with a plurality of quasi-flat cross-sections perpendicular to the longitudinal axis, wherein each said quasi-flat cross-section has a cross-sectional peripheral contour capable of being approximated to a rectangle-like figure having a width and a height, wherein the height is predeterminedly greater than the width, each said quasi-flat cross-section has a transversal axis parallel to the height, and, for any two adjacent quasi-flat sections, the corresponding transversal axes are disposed at a predetermined angle ALPHA in relation to each other, wherein each said quasi-flat cross-section encompasses a first number of strand pieces; and
a plurality of knobs formed between and connecting each two adjacent said quasi-flat sections, wherein each said knob is characterized with a knob cross-section perpendicular to the longitudinal axis and encompassing a second number of strand pieces; and
wherein the second number of strand pieces is greater than the first number of strand pieces.
2. The dental floss according to claim 1, wherein said angle ALPHA is substantially equal to 90 degrees.
3. The dental floss according to claim 1, wherein said strands are made of one of the following materials: PTFE, or woolly nylon, or a combination of PTFE and regular nylon, or silk, or polyester, or PTFE combined with soft metallic threads.
4. The dental floss according to claim 1, wherein said floss is made in any of the following forms: un-waxed, waxed, or impregnated with predetermined therapeutic agents.
5. The dental floss according to claim 4, wherein said predetermined therapeutic agents include components selected from the group consisting of: ions of fluorine, sodium laurite, sodium perborate, alantoin, myrrh extract, charcoal, and xylitol.
6. The dental floss according to claim 1, wherein said floss is flavored with any of the following: mint, orange, lemon, cherry, strawberry, or vanilla.
7. The dental floss according to claim 1, wherein said floss is produced in a variety of predetermined colors.
8. The dental floss according to claim 1, wherein said floss is made as an endless loop.
9. The dental floss according to claim 1, wherein said floss is manufactured by means of a predeterminedly adapted conventional overlock machine.
10. The dental floss according to claim 1, wherein said floss is wound up on a spool, said spool is placed in a casing that has an aperture for pulling said floss out of said casing.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. An optical detonator comprising a secondary explosive disposed in a cavity, an optical fiber having one end connected to a source of laser radiation, and said source of laser radiation being a laser diode, and a focusing optical interface situated between the other end of the optical fiber and the secondary explosive and adapted to transmit the laser radiation to the secondary explosive, wherein a layer of pyrotechnics is disposed in the cavity between the secondary explosive and the focusing optical interface, said pyrotechnics containing a metal in micronized powder form having a grain size smaller than 10 \u03bcm.
2. An optical detonator according to claim 1, wherein the thickness of the layer of pyrotechnics lies in the range of one-fourth to one-tenth the thickness of the secondary explosive.
3. An optical detonator according to claim 1, wherein the pressure to which the pyrotechnics is compacted is substantially equal to the pressure to which the secondary explosive is compacted.
4. An optical detonator according to claim 1, wherein the composition of the pyrotechnics is stoichiometric to within 15%.
5. An optical detonator according to claim 1, wherein the pyrotechnics is selected from the group consisting of thermites comprising aluminum and iron oxide, powders essentially comprising zirconium and potassium perchlorate, powders essentially comprising zirconium and barium chromate, powders essentially comprising titanium and potassium perchlorate, and powders essentially comprising titanium hydride and potassium perchlorate.
6. An optical detonator according to claim 1, wherein the pyrotechnics has a reducing metal selected from the group consisting of titanium, a titanium hydrides, aluminum and magnesium.
7. An optical detonator according to claim 1, wherein the pyrotechnics has an inorganic oxidizer which is at least one of potassium perchlorate, ammonium perchlorate, barium chromate, ammonium bichromate, ammonium nitrate, and iron oxides.
8. An optical detonator according to claim 1, wherein a transition to detonation conditions is triggered by deflagration of the secondary explosive.
9. An optical detonator according to claim 1, wherein a transition to detonation conditions is triggered by a shock wave created by an impact of a projectile disk propelled into the cavity by deflagration of the secondary explosive.
10. The optical detonator according to claim 1, wherein said focusing optical interface is adapted to generate a laser spot having a diameter of 50 \u03bcm to 100 \u03bcm.
11. The optical detonator according to claim 1, wherein said pyrotechnics comprises pyrotechnic compounds containing a reducing metal absorbing the infrared radiation of the laser beam.

1. A coating composition for forming a transparent, abrasion-resistant coating upon a substrate, the composition comprising:
A. the hydrolysis product of an epoxy functional alkoxy silane,
B. a curing agent comprising a cationic photoinitiator for polymerizing epoxy compounds,
C. a viscosity-reducing amount up to 50% by weight, solids basis, of a monomeric (silanol free) epoxy functional epoxy silane, and
D. colloidal silica present in an amount sufficient to improve abrasion resistance as compared to a composition lacking the colloidal silica.
2. A composition according to claim 1 further comprising one or more polymerizable monomers.
3. A composition according to claim 2 wherein the monomers are selected From the group consisting of ethylenically unsaturated monomers, non-silane epoxies, oxetanes, alkylalkoxysilanes or tetraalkoxysilanes, vinyl ethers, and non-silane cycloaliphatic epoxies.
4. A composition according to claim 1 further comprising a silane coupling agent.
5. A composition according to claim 4, wherein the agent comprises methyltrimethoxysilane (MTMS).
6. A composition according to claim 1 further comprising one or more polymerizable monomers and a silane coupling agent.
7. A composition according to claim 1 wherein the composition can be cured to provide a coating that exhibit an improved combination of abrasion-resistance and hardness as compared to a coating lacking the colloidal silica.
8. A composition according to claim 7 wherein the composition is prepared by providing and blending together parts A, C and D, followed by distillation to remove solvents, after which a cationic initiator B is incorporated and the composition can be photocured.
9. A composition according to claim 1 wherein the composition further comprises a polymerizable monomer and a silane coupling agent.
10. A composition according to claim 9 wherein
a) the epoxyfunctional alkoxy silanes of parts A and D are independently prepared from the group consisting of glycidoxymethyl-trimethoxysilane, glycidoxymethyltriethoxysilane, glycidoxymethyl-tripropoxysilane, glycidoxymethyl-tributoxysilane, \u03b2-glycidoxyethyltrimethoxysilane, \u03b2-glycidoxyethyltriethoxysilane, \u03b2-glycidoxyethyl-tripropoxysilane, \u03b2-glycidoxyethyl-tributoxysilane, \u03b2-glycidoxyethyltrimethoxysilane, \u03b1-glycidoxyethyl-triethoxysilane, \u03b1-glycidoxyethyl-tripropoxysilane, \u03b1-glycidoxyethyltributoxysilane, \u03b3-glycidoxypropyl-trimethoxysilane, \u03b3-glycidoxypropyl-triethoxysilane, \u03b3-glycidoxypropyl-tripropoxysilane, \u03b3-glycidoxypropyltributoxysilane, \u03b2-glycidoxypropyl-trimethoxysilane, \u03b2-glycidoxypropyl-triethoxysilane, \u03b2-glycidoxypropyl-tripropoxysilane, \u03b2-glycidoxypropyltributoxysilane, \u03b1-glycidoxypropyl-trimethoxysilane, \u03b1-glycidoxypropyl-triethoxysilane, \u03b1-glycidoxypropyl-tripropoxysilane, \u03b1-glycidoxypropyl-tributoxysilane, \u03b3-glycidoxybutyl-trimethoxysilane, \u03b4-glycidoxybutyl-triethoxysilane, \u03b4-glycidoxybutyl-tripropoxysilane, \u03b4-glycidoxybutyl-tributoxysilane, \u03b4-glycidoxybutyl-trimethoxysilane, \u03b3-glycidoxybutyl-triethoxysilane, \u03b3-glycidoxybutyl-tripropoxysilane, \u03b3-propoxybutyl-tributoxysilane, \u03b4-glycidoxybutyl-trimethoxysilane, \u03b4-glycidoxybutyl-triethoxysilane, \u03b4-glycidoxybutyl-tripropoxysilane, \u03b1-glycidoxybutyl-trimethoxysilane, \u03b1-glycidoxybutyl-triethoxysilane, \u03b1-glycidoxybutyl-tripropoxysilane, \u03b1-glycidoxybutyl-tributoxysilane, (3,4-epoxycyclohexyl)-methyl-trimethoxysilane, (3,4-epoxycyclohexyl)methyl-triethoxysilane, (3,4-epoxycyclohexyl)methyl-tripropoxysilane, (3,4-epoxycyclohexyl)-methyl-tributoxysilane, (3,4-epoxycyclohexyl)ethyl-trimethoxysilane, (3,4-epoxycyclohexyl)ethyl-triethoxysilane, (3,4epoxycyclohexyl)ethyl-tripropoxysilane, (3,4-epoxycyclohexyl)-ethyl-tributoxysilane, (3,4-epoxycyclohexyl)propyl-trimethoxysilane, (3,4-epoxycyclohexyl)propyl-triethoxysilane, (3,4-epoxycyclohexyl)propyl-tripropoxysilane, (3,4-epoxycyclohexyl)propyl-tributoxysilane, (3,4-epoxycyclohexyl)butyl-trimethoxysilane, (3,4-epoxycyclohexy)butyl-triethoxysilane, (3,4-epoxycyclohexyl)-butyl-tripropoxysilane, and (3,4-epoxycyclohexyl)butyl-tributoxysilane.
11. A composition according to claim 10 wherein the composition, when cared upon a polymeric substrate, provides improved abrasion resistance as compared to a composition lacking the colloidal silica.
12. A composition according to claim 1 wherein the composition is adapted to be cured on a polymeric surface to provide abrasion resistance (delta haze) of less than about 10%, when determined by Taber resistance, at 1000 cycles with a 500 g load.
13. A composition according to claim 12 wherein the abrasion resistance is less than about 5%.
14. A composition according to claim 13 wherein the abrasion resistance is less than about 2%.
15. A composition according to claim 1 wherein the ethylenically unsaturated monomer comprises an acrylic monomer.
16. A composition according to claim 15 wherein the acrylic monomer has an acrylic functionality not greater than two.
17. A composition according to claim 1 wherein the composition is provided in cured form upon a polymeric surface.
18. A composition according to claim 17 wherein the composition provides abrasion resistance (delta haze) of less than about 10%, when determined by Taber resistance, at 1000 cycles with a 500 g load.
19. A composition according to claim 18 wherein the abrasion resistance is less than about 5%.
20. A composition according to claim 19 wherein the abrasion resistance is less than about 2%.
21. A method of providing an abrasion resistant coating to a polymeric substrate, the method comprising the steps of providing a coating composition according to claim 1, and curing the composition on the surface.
22. A method according to claim 21 wherein the substrate comprises an optical lens.
23. A polymeric substrate coated according to the method of claim 21.
24. An optical lens coated according to the method of claim 22.
25. A composition according to claim 1 wherein the composition is substantially free of volatile solvents.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A communication method of a terminal in a wireless communication system, the method comprising:
receiving a reference signal and information on a number of layers supportable simultaneously from a base station;
measuring a channel state value based on the reference signal and the number of layers;
determining whether the measured channel state value fulfills a minimum required channel state value; and
transmitting, when the measured channel state value fulfills the minimum required channel state value, a value determined based on the measured channel state value to the base station.
2. The method of claim 1, further comprising determining a Channel Quality Indicator (CQI) based on the measured channel state value,
wherein transmitting of the value comprises transmitting a signal including the CQI to the base station.
3. The method of claim 2, further comprising determining a Rank Indicator (RI) based on the CQI,
wherein the transmitting of the value comprises transmitting the RI to the base station.
4. The method of claim 1, wherein the transmitting of the value comprises transmitting, when the measured channel state value fulfills the minimum required channel state value, a signal including an acknowledgement (ACK).
5. The method of claim 1, further comprising:
measuring, when the measured channel state value does not fulfills the minimum required channel state value, the channel state based on the reference signal; and
transmitting a signal including the measured channel state value and a negative acknowledgement (NACK).
6. A communication method of a base station in a wireless communication system, the method comprising:
determining a number of layers supportable simultaneously;
transmitting a signal including the number of simultaneously supportable layers and reference signal to a terminal; and
receiving, when a channel state value measured by the terminal based on the reference signal and the number of layers fulfills a minimum required channel state value, a signal including a value determined based on the measured channel state value from the terminal.
7. The method of claim 6, wherein the receiving of the signal comprises receiving the signal including a Channel Quality Indicator (CQI) determined based on the channel state value measured by the terminal.
8. The method of claim 7, wherein the receiving of the signal comprises receiving the signal including a Rank Indicator (RI) determined based on the CQI.
9. The method of claim 6, wherein the receiving of the signal comprises receiving, when the measured channel state value fulfills the minimum required channel state value, the signal including acknowledgement (ACK).
10. The method of claim 6, wherein the receiving of the signal comprises receiving, when the measured channel state value does not fulfill the minimum required channel state value, the signal including the value determined based on the measured channel state value and a negative acknowledgement (NACK).
11. A terminal of a wireless communication system, the terminal comprising:
a transceiver configured to receive a signal including a reference signal and information on a number of layers supportable simultaneously; and
a control unit configured to measure a channel state value based on the reference signal and the number of layers, determine whether the measured channel state value fulfills a minimum required channel state value, and control the transceiver to transmit, when the measured channel state value fulfills the minimum required channel state value, a value determined based on the measured channel state value to the base station.
12. The terminal of claim 11, wherein the control unit is configured to determine a Channel Quality Indicator (CQI) based on the measured channel state value and control the transceiver to transmit a signal including the CQI to the base station.
13. The terminal of claim 12, wherein the control unit is configured to determine a Rank Indicator (RI) based on the CQI and control the transceiver to transmit the RI to the base station.
14. The terminal of claim 11, wherein the control unit is configured to control, when the measured channel state value fulfills the minimum required channel state value, the transceiver to transmit a signal including acknowledgement (ACK).
15. The terminal of claim 11, wherein the control unit is configured to measure, when the measured channel state value does not fulfills the minimum required channel state value, the channel state value based on the reference signal and control the transceiver to transmit a signal including the measured channel state value and negative acknowledgement (NACK).
16. A base station of a wireless communication system, the base station comprising:
a control unit configured to determine a number of layers supportable simultaneously; and
a transceiver configured to transmit a signal including the number of simultaneously supportable layers and reference signal to a terminal and receive, when a channel state value measured by the terminal based on the reference signal and the number of layers fulfills a minimum required channel state value, a signal including a value determined based on the measured channel state value from the terminal.
17. The base station of claim 16, wherein the transceiver is configured to receive the signal including a Channel Quality Indicator (CQI) determined based on the channel state value measured by the terminal.
18. The base station of claim 17, wherein the transceiver is configured to receive the signal including a Rank Indicator (RI) determined based on the CQI.
19. The base station of claim 16, wherein the transceiver is configured to receive, when the measured channel state value fulfills the minimum required channel state value, the signal including acknowledgement (ACK).
20. The base station of claim 16, wherein the transceiver is configured to receive, when the measured channel state value does not fulfill the minimum required channel state value, the signal including the value determined based on the measured channel state value and a negative acknowledgement (NACK).