Abstract: In an example embodiment, a method is illustrated to determine multi-column indexes, the method including receiving one or more structured query language (SQL) queries, the one or more SQL queries defining a workload. A database index analysis tool may be used to determine a plurality of index configurations for executing the workload. Further, leading index configurations may be determined, leading index configurations including a subset of the plurality of index configurations. Also, a statistics database may be updated with complete statistics for the leading index configurations.

Abstract: The invention relates to a method for producing at least one compound having at least one at least monosubstituted amino group. According to the invention, a starting substance having at least one amino group is reacted with an alcohol in a reaction mixture in the presence of ammonia.

Abstract: The invention relates to a laminate, the top layer thereof comprising a paper impregnated with an aminoplast resin and surface modified silica nanoparticles. According to the invention the surface modified silica nanoparticles comprise at least one silane on the surfaces thereof, said silane carrying at least one functional group. The invention further relates to a method for the production of a laminate of said type.

Abstract: The invention relates to a method for producing a compound having at least one mono substituted amino group. According to the invention, a starting substance supporting at least one amino group as reacted with a reagent supporting a first functional group and at least one other functional group in a reaction mixture. The first functional group is a hydroxyl group and the at least one other functional group is selected from hydroxyl groups, mercapto groups, carboxylic acid groups, carboxylic acid ester groups, carboxylic acid amide groups, keto groups, carbonate groups, halogens, epoxy groups and carbamate groups. If several other functional groups are present, the groups are selected independently of one another from the aforementioned class. Melamine, urea and guanamine are, in particular, reacted with glycol, glycerine and hydroxyl acetic acid derivatives.

Abstract: There are a large number of sites in the world's oceans and rivers that can provide a significant, viable, and cost effective source of renewable energy. Many are strategically located close to populated areas where these sites can be used to harness energy using ecologically benign hydrodynamic technology. A hydrodynamic array comprises multiple hydrodynamic elements for producing electricity by the motion of ocean tides or river currents and forces acting on the hydrodynamic array, which is immersed in ocean tides or river currents and which is in motion relative to the ocean tides or river currents.

Abstract: The present invention relates to triazine derivatives of the general formula (I), their use and production.

Abstract: In an example embodiment, a method is illustrated to determine multi-column indexes, the method including receiving one or more structured query language (SQL) queries, the one or more SQL queries defining a workload. A database index analysis tool may be used to determine a plurality of index configurations for executing the workload. Further, leading index configurations may be determined, leading index configurations including a subset of the plurality of index configurations. Also, a statistics database may be updated with complete statistics for the leading index configurations.

Abstract: Determining the structure of permanent charge for an ion channel formulates an abstract operator, describing ion channel parameters, comprising equations that are ill-posed. The model of ion channel behavior relates the function of the ion channel to the structure of permanent charge within the ion channel and concentrations ions around the ion channel under certain properties and boundary conditions. The model also includes regularization of the abstract operator by approximating the ill-posed equations with a family of well-posed equations. An estimate of the closeness of the well-posed solution to the ill-posed solution is provided. Providing stable and convergent algorithms allows the model to determine a stability for the regularized solution, so that a regularization parameter can determine a balance between the stability and accuracy of the solution.

Abstract: The invention relates to melamine-formaldehyde condensates with thermoplastic properties that can be produced from formaldehyde and melamine derivatives, wherein at least one of the melamine derivatives organic radicals R have been used to substitute at least four of the total of six hydrogen atoms of the three melamine amino groups, and wherein the organic radicals R are mutually identical or different. The invention also relates to a process for production of the melamine-formaldehyde condensates, use thereof, and an analytical method for determining the constitution of the melamine-formaldehyde condensates.

Abstract: The invention relates to pre-impregnating agents for high-resistant and elastic composite fibres having 50-85 mass % textile surface components and 15-50 mass % polyaminotriazine ether containing carbamide acid ester groups. The invention also relates to methods for making the pre-impregnating agents. The pre-impregnating agents can be used for heat-protecting cloths, flameproof covers, electric insulating papers, construction parts and for vehicle equipment.

Abstract: The invention relates to products, especially moulding materials of polymers containing triazine segments and consisting of mixtures of meltable 4–18 ring oligotriazine ethers which are soluble in highly polar solvents, and in which the triazine rings are predominantly linked by alkylene diamino groups. Said moulding materials can contain up to 50 mass % of other reactive polymers such as ethylene copolymers, maleic acid anhydride copolymers, modified maleic acid anhydride copolymers, poly(meth)acrylates, polyamides, polyester and/or polyurethanes, up to 75 mass % of filling materials and/or reinforcing fibres, and up to 2 mass % of stabilisers, UV absorbers and/or auxiliary agents. The moulding materials of polymers containing triazine segments can be processed by means of conventional fusion methods and can be used as hot-melt adhesives and for producing plates, tubes, profiles, injection moulded parts, fibres, coatings and foamed material.

Abstract: A method for curing aminoplasts, during which layers having layer thicknesses of up to 300 um or filaments and fiber fibrids having a diameter of up to 300 um, which consist of: i) 95 to 99.95% by mass of solvent-free meltable aminoplast polycondensates with molar masses ranging from 1000 to 300000; j) 5 to 0.05% by mass of curing agents, which can be activated by actinic light and which are comprised of acidifiers of the blocked sulfonic acid and/or halogen-substituted triazine derivative and/or onium salt type, and optionally; k) 1 to 20% by mass, with regard to the meltable aminoplast polycondensates, of unmodified and/or modified maleic anhydride copolymers, and/or; i) 0.1 to 5% by mass, with regard to the meltable aminoplast polycondensates, of nanoparticles. The aminoplasts are cured by irradiating them with actinic light at a temperature between the melting point of the aminoplast polycondensate and the thermoinduced decomposition temperature of the light-activatable curing agents.

Abstract: Compositions for producing aminoplast products by means of melt processing consisting of: A) 95 to 99.9% by mass of solvent-free meltable polycondensates of melamine resins having molar masses ranging from 300 to 300 000; A) from 0.

Abstract: The invention relates to products, especially moulding materials of polymers containing triazine segments and consisting of mixtures of meltable 4-18 ring oligotriazine ethers which are soluble in highly polar solvents, and in which the triazine rings are predominantly linked by alkylene diamiino groups. Said moulding materials can contain up to 50 mass % of other reactive polymers such as ethylene copolymers, maleic acid anhydride copolymers, modified maleic acid anhydride copolymers, poly(meth)acrylates, polyamides, polyester and/or polyurethanes, up to 75 mass % of filling materials and/or reinforcing fibres, and up to 2 mass % of stabilisers, UV absorbers and/or auxiliary agents. The moulding materials of polymers containing triazine segments can be processed by means of conventional fusion methods and can be used as hot-melt adhesives and for producing plates, tubes, profiles, injection moulded parts, fibres, coatings and foamed material.

Abstract: Mixtures of triazine derivatives free from polyalkylene oxide Mixtures of triazine derivatives free from polyalkylene oxide are produced from 20 to 70 percent by weight of triazine derivatives with hydroxyalkyl amino groups and 80 to 30 percent by weight of triazine derivatives with bis(hydroxyalkyl) imino groups by catalytic reaction of alkylpropylene oxides with triazine derivatives at a melamine derivative/alkylpropylene oxide molar ratio of 1:1.5 to 1:10 in the presence of metal alkyls, metal hydrides, metal alcoholates and/or metal alkylamides as catalysts. The triazine derivative/hydroxy group mixtures free from polyalkylene oxide are particularly suited for producing plastic materials, flame retardants, additives, pharmaceuticals, textile auxiliaries, and paints or finishes.

Abstract: Polymers are prepared from A) 60 to 95 percent by weight of a mixture including A1) 20 to 70 percent by weight of hydroxyalkyl amino triazines and A2) 30 to 80 percent by weight of bis(hydroxyalkyl) amino triazines B) 5 to 40 percent by weight of polyfunctional compounds selected from one or more of B1) polyisocyanates and/or oligomeric polyesters or polyethers with isocyanate end groups, B2) aliphatic dicarboxylic acids, esters, chlorides or anhydrides, or aromatic polybasic acids, esters, chlorides or anhydrides, B3) aliphatic or aromatic diglycidal compounds or triglycidyl compounds, and, optionally, C) 1 to 20 percent by weight of aliphatic, cycloaliphatic or aromatic dihydroxy compounds, polyalkylene glycols and aliphatic aldehydes.

Abstract: The automatic control and administration of program-controlled endoscopic apparatuses allocated to an operation within an operating theater belonging to a clinic region and connected amongst one another by way of a CAN-bus using the standardized layer-seven CANopen protocol for communication among one another and a master computer, is modified so that with the same CAN-bus, a double ring structure, a ring-star structure and a ring-ring structure may be logically formed, permitting peer-to-peer communication of the apparatuses, with which the apparatuses have equality of access to each other and the master computer. The apparatuses, connected to one another via the CAN-bus, of all operating theaters of a clinic communicate with and are centrally controlled by the master computer. All apparatuses are capable of informing the master computer of the occurring process data or parameters. System operation is possible at the master computer as well as at the apparatuses themselves.

Abstract: Mixtures of triazine derivatives free from polyalkylene oxide are produced from 20 to 70 percent by weight of triazine derivatives with hydroxyalkyl amino groups and 80 to 30 percent by weight of triazine derivatives with bis(hydroxyalkyl) imino groups by catalytic reaction of alkylpropylene oxides with triazine derivatives at a melamine derivative/alkylpropylene oxide molar ratio of 1:1.

Abstract: Polymers made from triazine derivatives for intermediates and molded materials with improved toughness and high flame resistance and strength consisting of

Abstract: The interface circuit serves for connecting two apparatus by way of a bidirectional bus which comprises a data lead for transmitting data and a cycle lead for transmitting a cycle signal. The interface circuit consists of a circuit arrangement provided at each apparatus, which comprises a separating means for separating the data signal on the data lead and the cylce signal on the cycle lead in each case into a transmitting and a receiving branch, and which furthermore comprises in each case for the data lead and the cylce lead a bus driver having a differential transmitter and receiver. The data signals and cylce signals between the apparatus are transmitted via differential leads.