Abstract: Catalyst systems of the Ziegler-Natta type comprise as active constituents a) a solid component comprising a compound of titanium or vanadium, a compound of magnesium, a particulate inorganic oxide as support and an internal electron donor compound, and as cocatalyst b) an aluminum compound and c) if desired, a further, external electron donor compound, wherein the particulate, inorganic oxide used has a specific surface area of from 350 to 1000 m2/g and a mean particle diameter {overscore (D)} in the range from 5 to 60 &mgr;m and comprises particles which are composed of primary particles having a mean particle diameter {overscore (d)} in the range from 1 to 10 &mgr;m and contain voids or channels between the primary particles, where the macroscopic proportion of voids or channels having a diameter of greater than 1 &mgr;m in the particles of the inorganic oxides is in the range from 5 to 30% by volume and the molar ratio of the compound of magnesium to the particulate, inorganic oxide is from 0.

Abstract: Process for activating a Fischer-Tropsch synthesis catalyst that comprises at least two stages: at least one stage for activation in the presence of hydrogen, or a mixture of hydrogen and an inert gas, and at least one stage for activation in the presence of carbon monoxide or a mixture of carbon monoxide and an inert gas, and optionally a third activation stage that is carried out either in the presence of hydrogen or a mixture of hydrogen and an inert gas, or in the presence of carbon monoxide or a mixture of carbon monoxide and an inert gas.

Abstract: Polymerizable alkanes are prepared by gas-phase polymerization in the presence of catalyst systems by a process in which the catalyst systems used are supported castalyst systems.

Abstract: The present invention employs a generative approach for configuring systems such that a system may be configured based on component or resource requests, or input in the form of need. The present invention provides a constraint-based configuration system using a structural model hierarchy. The structural aspects of the model provide the ability to define a model element as being contained in, or by, another model element. In addition, the structural model provides the ability to identify logical datatype and physical interconnections between elements and establish connections between elements. To configure a system, the present invention accepts input in the form of requests (e.g., component or resource) or needs, such as an expression of a need for a desktop computer system to be used in a CAD (i.e., computer-aided design) environment.

Abstract: Supported catalyst systems are obtainable by A) reaction of an inorganic carrier with a metal compound of the general formula I M1(R1)r(R2)s(R3)t(R4)u  I  where M1 is an alkali metal, an alkaline earth metal or a metal of main group III or IV of the Periodic Table, R1 is hydrogen, Ch1-C10-alkyl, C6-C15-aryl, alkylaryl or arylalkyl each having 1 to 10 carbon atoms in the alkyl radical and 6 to 20 carbon atoms in the aryl radical, R2 to R4 are each hydrogen, halogen, C1-C10-alkyl, C6-C15-aryl, alkylaryl, arylalkyl, alkoxy or dialkylamino each having 1 to 10 carbon atoms in the alkyl radical and 6 to 20 carbon atoms in the aryl radical, r is an integer from 1 to 4 and s, t and u are integers from 0 to 3 the sum r+s+t+u corresponding to the valency of M1, B) reaction of the material obtained according to A) with a metallocene complex in its metal dihalide form and a compound forming metallocenium ions and C) subsequent reaction with a metal compound of the general formula I

Abstract: A data transmission system having a real-time data engine for processing isochronous streams of data includes an interface device that provides a physical and logical connection of a computer to any one or more of a variety of different types of data networks. Data received at this device is presented to a serial driver, which disassembles different streams of data for presentation to appropriate data managers. A device handler associated with the interface device sets up data flow paths, and also presents data and commands from the data managers to a real-time data processing engine. Flexibility to handle any type of data, such as voice, facsimile, video and the like, that is transmitted over any type of communication network with any type of real-time engine is made possible by abstracting the functions of each of the elements of the system from one another.

Abstract: Polymers of alkenes are prepared by suspension polymerization in the presence of catalyst systems by a process in which the catalyst systems used are supported catalyst systems obtainable by A) reaction of an inorganic carrier with a metal compound of the general formula I M1(R1)r(R2)s(R3 )t(R4 )u  I where M1 is an alkali metal, an alkaline earth metal or a metal of main group III or IV of the Periodic Table, R1 to R7 are variously halogen, alkoxy, dialkylamino, hydrogen, C1-C10-alkyl, C6-C15-aryl, alkylaryl or arylalkyl each having 1 to 10 carbon atoms in the alkyl radical and 6 to 20 carbon atoms in the aryl radical, r, s, t and u are integers from 1 to 4 the sum r+s+t+u corresponding to the valency of M1, B) reaction of the material obtained according to A) with a metallocene complex in its metal dihalide form and a compound forming metallocenium ions and C) subsequent reaction with a metal compound of the general formula II M2(R5)o(R6)p(R7)q  II.

Abstract: Catalyst systems of the Ziegler-Natta type comprise as active constituents

Abstract: Vinyl monomers are polymerized in the aqueous phase in the presence of at least one N-oxyl compound of a secondary amine, having no hydrogen atoms bonded to the &agr; carbon atoms. This process substantially eliminates deposits on reactor surfaces.

Abstract: Polymers of alkenes are prepared by suspension polymerization in the presence of catalyst systems by a process in which the catalyst systems used are supported catalyst systems obtainable by

Abstract: Continuous-feed plasma treater systems are designed to treat continuous substrates, such as webs or films, by continuously feeding the substrates through an enclosure having a plasma discharge that alters the substrate's surface properties in some desirable fashion. According to the present invention, the enclosure has one or more electrode assemblies that generate plasma discharges at working-gas pressures ranging from moderate pressures (e.g., rough vacuums as low as about 10 Torr) to high pressures (e.g., about one Atmosphere). The electrode assemblies are driven by power supplies that excite the electrode assemblies in either an RF resonant excitation mode or a pulsed voltage excitation mode.

Abstract: Supported catalyst systems are obtainable bya) application of a mixture ofA) at least one metallocene complex andB) at elast one metal compoundto a carrier which, if required, may have been pretreated, andb) subsequent activation by reaction with a solution or suspension of a compound forming metallocenium ions.

Abstract: Decay time in scintillator compositions comprising yttrium or lutetium and gadolinium oxides and europium oxide is decreased by incorporating therein at least one of the oxides of ytterbium, samarium, praseodymium, neodymium, dysprosium, holmium, thulium, cerium and erbium as an acceptor. Other properties including afterglow and radiation damage are maintained at acceptable levels.

Abstract: The present invention employs a generative approach for configuring systems such that a system may be configured based on component or resource requests, or input in the form of need. The present invention provides a constraint-based configuration system using a structural model hierarchy. The structural aspects of the model provide the ability to define a model element as being contained in, or by, another model element. In addition, the structural model provides the ability to identify logical datatype and physical interconnections between elements and establish connections between elements. To configure a system, the present invention accepts input in the form of requests (e.g., component or resource) or needs, such as an expression of a need for a desktop computer system to be used in a CAD (i.e., computer-aided design) environment.

Abstract: A method for evaluating changes in the intensity of polychromatic radiation that is transmitted by a source having a known frequency spectrum (e.g. an X-band spectrum), and received by a sensor after having passed through a certain thickness of a body or sample consisting of one or more phases having a known composition, whereby artifact-related reconstruction errors may be corrected. The method is characterized in that the changes in intensity are evaluated by modeling the influences of a number of predetermined parameters related to the nature of each phase on the absorption coefficient of the body in one or more spectral bands of the polychromatic radiation. The method is useful for the tomographic analysis of geological samples or the human body.

Abstract: A data transfer mechanism for a serial interface is provided whereby data transfer may be precisely controlled, eliminating the need for significant buffering. The data transfer mechanism also provides for flexible data transfer in either a byte mode or a burst mode so as to accommodate any of various telecommunications devices having a range of capabilities and data rates, and minimizes host involvement in the data transfer operation.

Abstract: A medical apparatus is provided with a programmable medical device disposed at a first room location and a remote monitor and/or controller disposed at a second room location. The programmable medical device is used to administer a medical treatment to a patient, and the remote monitor/controller may be used to monitor the operation of the medical device, control the operation of the medical device, and/or to transfer data from the medical device to the remote monitor/controller. The apparatus may allow voice communication between the remote monitor/controller and the patient who is receiving treatment via the medical device while the medical device is being monitored and/or controlled from the remote location. The remote monitor/controller may also include means for determining the type of medical device to which it is connected.

Abstract: Decay time in scintillator compositions comprising yttrium or lutetium and gadolinium oxides and europium oxide is decreased by incorporating therein at least one of the oxides of ytterbium, samarium, praseodymium, neodymium, dysprosium, holmium, thulium, cerium and erbium as an acceptor. Other properties including afterglow and radiation damage are maintained at acceptable levels.

Abstract: Disclosed are sealant compositions and electrical connectors having excellent low temperature repairability and outstanding sealing ability at both high and low temperatures. The preferred connectors contain a sealant composition comprising an elastomeric thermoplastic polymer and an extender for said polymer, said extender constituting a major proportion by weight of said sealant composition and said polymer constituting a minor proportion by weight of said sealant composition, wherein said composition preferably has a low-temperature wire insertability of at least about 80 mm. Furthermore, the preferred compositions are both slump and spew resistant over the operating temperature range of the connector.

Abstract: An intelligent communications coprocessor connects computer workstations to moderate-bandwidth (up to 2 megabits/second) digital communications services. In particular, such communications services include but are not limited to Integrated Services Digital Network (ISDN) or Private-Branch Exchange (PBX) communications facilities. The communications coprocessor takes advantage of certain host resources including, preferably, signal processing capabilities of the computer, the computer's power supply and a generalized, high-speed computer/ peripheral serial interface. System cost for digital communications over such communications facilities is therefore reduced. Furthermore, the communications coprocessor can be used to support the transmission of arbitrary real-time, synchronous data streams as encountered in voice and video transmission services. This capability is required for many applications including voice recognition, text-to-speech, and videoconferencing.