Abstract: The invention relates to a method for position-independent transmission and reception of data to and from a high-capacity passenger aircraft (10), characterised by the steps of: installing, in the vicinity of a window of said passenger aircraft (10), at least one antenna (16) designed for communicating with an airborne communications hub (22), transmitting and/or receiving the data between at least the antenna (16) and an airborne communications hub (22) during the flight, and transmitting the data within the aircraft (10), between the antenna (16) and a routing device (20) connected to said antenna (16).

Abstract: A device for air-to-ground communication between an aircraft and a ground station, said aircraft and said ground station each having antennas for directional radio data transmission. The data transmission is performed in a frequency band from 60 GHz to 90 GHz and the antenna of the ground station transmits and receives data exclusively in a range of angles ? of at least 5 degrees in the upward direction relative to the horizontal plane.

Abstract: A secure housing for a portable computer, which has a screen, operating keys and at least one connector, can be transferred from an open state to a closed state. In order to protect the computer and the data stored thereon, the secure housing can be locked in the closed state and conceals at least one operating key of the computer while the screen is exposed.

Abstract: A device for air-to-ground communication between an aircraft and a ground station, said aircraft and said ground station each having antennas for directional radio data transmission. The data transmission is performed in a frequency band from 60 GHz to 90 GHz and the antenna of the ground station transmits and receives data exclusively in a range of angles ? of at least 5 degrees in the upward direction relative to the horizontal plane.

Abstract: A passenger seat including a holding device for a media reproducing apparatus, includes a base holding fixture attached to a backrest of said passenger seat, at least one adapter adapted to be detachably connected with said base holding fixture, said adapter being configured for holding said media reproducing apparatus at said base holding fixture, a standardized electronic interface to the power supply of said media reproducing apparatus, and a protective shutter fixedly connected with said backrest. The protective shutter is adapted to be moved from an open position in which access to said adapter and said media reproducing apparatus is allowed, into a closed position in which said media reproducing apparatus and said adapter are completely covered by said protective shutter. The protective shutter is of break-proof configuration and made at least partially from a translucent material such that a screen is visible through said protective shutter in the closed position.

Abstract: The present invention relates to a seat for a vehicle, particularly an aircraft, having a visual playback device integrated in a surface of the seat. A base firmly connected to the seat is arranged in the surface of the seat. Said visual playback device is releasably attached to the base by means of a holder adapted to the visual playback device and the base.

Abstract: Method for performing announcements in a means of transport that has an announcement device having at least one loudspeaker and an entertainment device, having the following steps: an announcement start signal is sent from the announcement device to the entertainment device at the beginning of an announcement; an interruption to the reproduction of the reproduction appliance is prompted by the entertainment device when the announcement start signal is received; the announcement is reproduced as an audible announcement signal via the announcement loudspeaker; continuation of the reproduction of the reproduction appliance is prompted by the entertainment device when an announcement end signal is received or at the end of reception of the announcement start signal, characterized by detection of an audio signal that is output by the announcement loudspeaker by the entertainment device, wherein the reproduction of the reproduction appliance is automatically interrupted after the audio signal is detected.

Abstract: A passenger seat including a holding device for a media reproducing apparatus, includes a base holding fixture attached to a backrest of said passenger seat, at least one adapter adapted to be detachably connected with said base holding fixture, said adapter being configured for holding said media reproducing apparatus at said base holding fixture, a standardized electronic interface to the power supply of said media reproducing apparatus, and a protective shutter fixedly connected with said backrest. The protective shutter is adapted to be moved from an open position in which access to said adapter and said media reproducing apparatus is allowed, into a closed position in which said media reproducing apparatus and said adapter are completely covered by said protective shutter. The protective shutter is of break-proof configuration and made at least partially from a translucent material such that a screen is visible through said protective shutter in the closed position.

Abstract: The present invention relates to a seat for a vehicle, particularly an aircraft, having a visual playback device integrated in a surface of the seat. A base firmly connected to the seat is arranged in the surface of the seat. Said visual playback device is releasably attached to the base by means of a holder adapted to the visual playback device and the base.

Abstract: A simplified mobile data communication device (10) for a transport means has a data server (14) and a broadband data communication interface (16) connected to the data server (14), the data communication device (10) having an entirely sealable, portable housing (12) which entirely surrounds the data server (14) and the data communication interface (16).

Abstract: Method for performing announcements in a means of transport that has an announcement device having at least one loudspeaker and an entertainment device, having the following steps: an announcement start signal is sent from the announcement device to the entertainment device at the beginning of an announcement; an interruption to the reproduction of the reproduction appliance is prompted by the entertainment device when the announcement start signal is received; the announcement is reproduced as an audible announcement signal via the announcement loudspeaker; continuation of the reproduction of the reproduction appliance is prompted by the entertainment device when an announcement end signal is received or at the end of reception of the announcement start signal, characterized by detection of an audio signal that is output by the announcement loudspeaker by the entertainment device, wherein the reproduction of the reproduction appliance is automatically interrupted after the audio signal is detected.

Abstract: An entertainment network for passengers in a means of transportation, such as an airplane, having at least one data server for video and/or audio data. A routing device is connected to the data server. The entertainment network has at least one playback device which is provided for a passenger for the duration of a trip in order to play back the audio/video data. The routing device is designed for the wireless broadband transmission of the video/audio data to numerous playback devices simultaneously and in at least two different frequency bands independently of one another. The playback device is designed to only receive the data of a first frequency band, and a second frequency band is designed to be received only by individual passenger terminals, such as notebooks, tablets, or smartphones. The invention likewise relates to methods for transmitting audio/video data to entertain passengers in a means of transportation.

Abstract: A secure housing for a portable computer, which has a screen, operating keys and at least one connector, can be transferred from an open state to a closed state. In order to protect the computer and the data stored thereon, the secure housing can be locked in the closed state and conceals at least one operating key of the computer while the screen is exposed.

Abstract: N-Methyl-2-pyrrolidone (NMP) is prepared by preparing a mixture comprising monomethylamine, dimethylamine and trimethylamine and ammonia in a first process step by reacting ammonia with methanol at elevated temperature in the presence of a catalyst, separating 10 off the ammonia, reacting the mixture comprising the methylamines with gamma-butyrolactone (&ggr;-BL), in a molar ratio of monomethylamine to &ggr;-BL of at least 1 in a second process step at elevated temperature and superatmospheric pressure, separating NMP and unreacted methylamines from the reaction product and returning unreacted methylamines to the first process step for reaction with methanol and ammonia.

Abstract: Alkanals having a 2-alkyl branch are obtained from mixtures which contain the alkanals having a 2-alkyl branch in addition to n-alkanals, 3-alkylalkanals and/or further isomers by a process in whicha) the alkanal mixture is reacted with an aqueous formaldehyde solution in the presence of a secondary amine and of a carboxylic acid as a catalyst,b) the aqueous phase containing the catalyst and any unconverted excess formaldehyde is separated off andc) the alkanals having a 2-alkyl branch are isolated by distillation from the condensates of the other alkanals with formaldehyde.

Abstract: 1,1-disubstituted ethylene compounds of the general formula I ##STR1## where Z is COOR.sup.2, CN or COR.sup.3, R.sup.1 is an aliphatic, cycloalophatic, araliphatic, aromatic or heterocyclic radical which may be further substituted by functional groups which are inert under the reaction conditions, R.sup.2 is an aliphatic, cycloaliphatic or araliphatic radical of 1 to 15 carbon atoms and R.sup.3 is an aliphatic, cycloaliphatic or araliphatic radical of 1 to 15 carbon atoms which may be substituted by groups which are inert under the reaction conditions, and R.sup.1 together with R.sup.2 or R.sup.1 together with R.sup.3 may furthermore form an alkylene chain of 2 to 10 carbon atoms which may be substituted by groups which are inert under the reaction conditions, are prepared from a formyl compound of the general formula II ##STR2## where Z, R.sup.1, R.sup.2 and R.sup.3 have the above meanings, by a process in which the reaction is carried out in the presence of formaldehyde or paraformaldehyde and(a) a C.sub.

Abstract: Bridged, water-soluble copolymers are obtainable by(A) copolymerization of a monomer mixture of(a) from 50 to 99 mol % of acrylamide and/or methacrylamide,(b) from 50 to 1 mol % of a monoethylenically unsaturated monomer containing actual groups and(c) from 0 to 20 mol % of monomers which differ from (a) and (b),in the presence of a polymerization initiator under conditions such that the acetal groups of the monomers (b) undergo virtually no hydrolysis,(B) hydrolysis of the acetal groups of the monomers (b), present as copolymerized units in the copolymers (A),(C) condensation of the copolymers (B) containing aldehyde groups at a pH above 5, at most to a degree such that the resulting condensates are still water-soluble and(D) stopping of the condensation reaction by adding acid until the pH reaches 3 or less,and are used as paper stock additives in papermaking for increasing the wet strength of paper.

Abstract: 1,3-Di(alkoxycarbonylamino)propanes of the general formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 can be identical or different and each is hydrogen, or an aliphatic, cycloaliphatic, araliphatic or aromatic radical, and R.sup.4 is an aliphatic, cycloaliphatic or araliphatic radical, are prepared by reacting an .alpha.,.beta.-unsaturated aldehyde with a carbamic acid ester by reacting in a first stage as the .alpha.,.beta.-unsaturated aldehyde a compound of the general formula II ##STR2## where R.sup.1, R.sup.2 and R.sup.3 have the abovementioned meanings, with a carbamic acid ester of the general formula III ##STR3## where R.sup.4 has the abovementioned meanings, at 0.degree.-150.degree. C. to give a 1,1,3-tri(alkoxycarbonylamino)propane of the general formua IV ##STR4## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 have the abovementioned meanings, and in a second stage heating the compound of the general formula (IV) in the presence of a hydrogenation catalyst and hydrogen under 1-300 bar at 100.