Abstract: The management of the priorities of access to a memory is characterized in that each request generator module (DP,GP) separately formulates the requests for access to a single word (DPREQ1, GPREQ1) and the requests for access to a plurality of words (DPREQN, GPREQN); differing priorities (REGA, REGB, REGC, REGD) may then be allocated (VALREG) to each type of request. Advantageously the requests for a single word are arbitrated by a first module which transmits a selected request to a second module.

Abstract: A laptop computer having an internal modem and facsimile adapter in its main body including a member, on one side of which is formed a touch display screen, which is pivotably mounted by means of a hinge to the main body and which is positionable between a closed position abutting the keyboard, disk drive and a CD ROM drive, and an open position in which the display screen is upright. The member includes the entire paper path for an image scanner contained in the member, which paper path extends from a paper feed slot in a free end of the member remote from the hinge and a paper release slot in the other side of the member proximate the hinge. The member is connected to the hinge by a pair of electrical connectors which are configured so that the member may be connected in either of two ways with a selected side of the member facing the keyboard during operation of the computer.

Abstract: A method of and system for displaying navigation data for a vehicle in conjunction with an image of the vehicle environment, in which from navigation data of a vehicle, derived from a navigation system, there is formed an indication signal which is superposed on an image of the local environment generated by an image pick-up unit. The combination of indication signal and local environmental image is displayed on a display unit.

Abstract: An X-ray analysis apparatus comprises an adjustable entrance slit which consists of two laminations which are rotatable about axes extending parallel to a .theta.-axis. By choosing the radius of the laminations and their position in the X-ray beam, a substantially more accurate adjustment can be achieved notably for small .theta.-values. Moreover, asymmetry in the beam path can be simply compensated for and improved shielding against scattered radiation is achieved.

Abstract: An amplifier arrangement includes a transistor differential pair (N1, N2) having an input terminal (3) and an output terminal (4). The transistor differential pair is coupled to a current mirror (P1, P2). A first level shifting circuit (6) and a second level shifting circuit (7) stabilize the d.c. voltage levels on the mutually coupled main electrodes of the differential pair (N1, N2) and the current mirror (P1, P2) respectively. Consequently, the influence of the Early-effect on the differential pair is suppressed and an improved linear signal transmission is obtained from the input terminal (3) to the output terminal (4). The level shifting circuit (6) also provides a base current compensation in order to produce a high input impedance and the second level shifting circuit (7) provides a base current compensation for equal adjusting currents through the differential pair to reduce any offset voltage.

Abstract: A depilator is provided comprising a housing which includes a skin-following surface for the skin to be depilated and at least one drivable hair pulling element rotatably mounted in the housing, the axis of the element being directed perpendicular to the skin-following surface. A first hair pulling element is arranged annularly while a second hair pulling element adjoins the inside wall of the first hair pulling element.

Abstract: An electric shaving apparatus is provided which comprises a housing, a switch for activating switching cycles in which the apparatus is switched on and off, a holder for at least one external shaving member with hair-entry apertures, and an internal shaving member adapted to be driven by the external shaving member, the housing having a collecting space for shaving particles, which collecting space has a closing member with a locking mechanism, which locking mechanism comprises an actuating member, the apparatus comprising means for counting the number of switching cycles and a signalling device for signalling that cleaning of the collecting space is desirable in response to a predetermined or selected number of switching cycles. The signalling device comprises a light-emitting element in combination with the actuating member.

Abstract: Semiconductor diode lasers of the so-called NAM (Non-Absorbing Mirror) type are used due to the high emanating power as writing (and reading) lasers in optical recording systems. The known lasers of this type include both in the active region (13') and in the mirror region (17, 19) a cladding layer (1), which fills a groove and is provided on an absorbing layer (9) (17, 19). The fundamental lateral mode is favored in both regions (13'), (17, 19) by absorption of part of the radiation produced. Due to the absorption in the mirror region (17, 19) mirror degradation occurs, which limits the maximum power and the life of the laser. A new semiconductor diode laser includes in the mirror region (17, 19) a first cladding layer (1'), a radiation-guiding layer (2') and a third cladding layer (6). In the radiation-guiding layer (2'), a radiation guide (15) is formed by an arrangement (12) in the radiation-guiding layer (2'), by which a step is formed in the effective refractive index.

Abstract: A heat-actuated valve is inserted between a first vacuum space and a further vacuum space in a particle beam apparatus. The valve is preferably activatable by the temperature required for evacuating first vacuum chamber by heating. Preferably, the valve device itself is also evacuatable by heating; this can be readily realized by avoiding the use of non-metal valve members when the valve is inserted between two spaces wherebetween a compartively small absolute difference in pressure exists, in the closed condition of the valve.

Abstract: The invention relates to a magnetic resonance tomography method where a plurality of sequences act on an object to be examined in the presence of a steady, uniform magnetic field, each of said sequences including the generating of a magnetic rf pulse in conjunction with a first magnetic gradient field and the reading of a spin resonance signal in the presence of a second magnetic gradient field having a gradient extending perpendicularly to the gradient of the first field, an image of the nuclear magnetization distribution being reconstructed from the spin resonance signals by Fourier transformation. In order to produce a survey image therefrom in an as short as possible period of time, the object to be examined is displaced during the examination in the direction of the gradient of the first magnetic gradient field, the image of the nuclear magnetization distribution being line-wise reconstructed by way of a one-dimensional Fourier transformation of the spin resonance signal each time obtained.

Abstract: A data processing system buffers sequential data for the duration of cyclically recurrent delay times. Memory location allocation is performed in such a way, that the memory is used efficiently without data-shifting after a read-out, and that the address generator is fairly simple.

Abstract: An electronic current compensation circuit which includes a series connections of a load (L) and a first control current source (3) and also includes a current follower (7). A second control current source (6) identical to the first control current source is connected to the input (8) and the first output (9) of the current follower. A second output of the current follower is connected to the junction (4) of the load and the first control current source to compensate for the load current (i.sub.L).

Abstract: A first doped region (20) is grown on a semiconductor substrate (1) as a superlattice region having alternate layers (21, 22) of a first and second semiconductor material followed by a waveguide region (30) having at least a superlattice region with alternate layers (31, 32) of the first and second semiconductor materials. A second doped region (40) is then grown as a superlattice including alternate layers (41, 42) of the first and second semiconductor materials on the waveguide region (30). The first and second doped regions (20 and 40) are grown so that the layers (21, 22, 41, 42) of the first and second semiconductor materials are sufficiently thin and are sufficiently highly doped as to become disordered during growth so that the first and second doped regions (20 and 40) are formed by an alloy of the first and second semiconductor materials having a lower refractive index and larger bandgap than the waveguide superlattice region (30).

Abstract: A mixer tool (8) for an ice-cream maker is provided which is insertable centrally into a cylindrical container (1) of the ice-cream maker and is operable there in rotation and which has at least one scraper (12, 13) projecting from a central shaft (6) and acting with the walls of cold cartridge 3 through its scraper edges (16, 17) and which also has at least one stirrer (14, 15) projecting from a central shaft (6), effective at least in the vicinity of the container wall (7), the stirrer effecting in the container flow at least directed from bottom to top of an ice-cream mixture filled into the latter. The stirrer also has at its free upper end close to the container wall a knife-shaped scraper (20, 21) projecting over the stirrer and acting together with the container wall to prevent formation of ice cream deposits above the stirrer.

Abstract: An optoelectronic device with a coupling is provided, comprising a lens (10), between an optical transmission fiber (13) and a semiconductor laser diode (2), which device is provided with a holder (1) for the laser diode, a holder (12) for the optical transmission fiber and an intermediate piece (16) present between these two holders, the spherical lens (10) being accommodated in the cover (9) of the holder (1) of the laser diode (2), while the holder (12) of the transmission fiber contains a hollow glass rod (14) in which a core portion (11) of the transmission fiber is accommodated, the end (15) of the glass rod and the fiber core being flat and polished, while the intermediate piece (16) has a sleeve shape and slides with exact fit over the cover (9) of the holder of the semiconductor laser diode (2), which sleeve-shaped intermediate piece has two grooves spaced some distance apart, at which grooves the intermediate piece and the cover of the holder of the semiconductor laser diode are fastened to one anot

Abstract: In the manufacture of preforms for optical fibres, the materials of the core (.alpha.) and of the light-conducting cladding layer (.beta..sub.1) are previously deposited from the gaseous phase. Deposition time is here considerably reduced in that only the materials of the core (.alpha.) and a part of the light-conducting cladding layer (.beta..sub.1) are deposited from the gaseous phase and the remaining light-conducting cladding material (.beta..sub.2 +.beta..sub.3) is supplied as pre-formed tubes of cladding material.

Abstract: A balanced filter circuit includes only one balanced amplifier (10) having an inverting input (6) and a non-inverting input (5) and an inverting output (7) and a non-inverting output (8) for realization of filter transfer functions Uout/Uin of the second or higher order from an input signal Uin at input terminals (1, 2) to an output signal Uout at output terminals (3, 4) having passive admittances which are composed of a parallel-combination of a resistor (R42, R44) and/or a capacitor (C41, C44) and/or a number of series-combinations of a resistor (R41, R43, R45) and a capacitor (C42, C43, C45).

Abstract: A radiation-sensitive semiconductor device, more particularly but not exclusively a photo detection arrangement for determining the postion of a luminous spot, including a semiconductor body having at least two radiation-sensitive diodes and amplifying circuitry for the photocurrent generated by the luminous spot. The amplifying circuitry includes transistors arranged outside the area of the semiconductor body occupied by the radiation-sensitive diodes. Each transistor is assigned to and connected to a radiation-sensitive diode, while at least the active parts of the transistors are arranged more closely to each other in the semiconductor body than the diodes to which they are assigned. A focusing arrangement may advantageously incorporate such as semiconductor photodetector.

Abstract: An MRI method for spectroscopy utilizes a sequence which includes four RF electromagnetic pulses (p1, p2, p3, p4), three of which are spatially selective to generate a resonance signal (e) from a sub-volume of an object. The phase difference between the first and the second 90.degree. excitation pulse amounts to 90.degree.. The waiting period (dt1) between the first and the second pulse (p1, p2) is chosen so that the second pulse (p2) selectively resets the nuclear spins excited by the first non-selective pulse (p1) in the longitudinal direction. The selectively reset magnetization, for example of fat, is recalled, after the dephasing of the non-reset magnetization, for example of water, by the further pulses (p3, p4). A spectrum is determined from the resonance signal (e). In a modified version in which the phases of the first and the second pulse are the same, the sequence is used for shimming a local field around the sub-volume.

Abstract: Thin-film transformer, for example suitable for use in a thin-film magnetic head, comprising a magnetic yoke composed of two magnetically permeable thin layers 3 and 5 and a primary turn constituted by an electrically conducting thin layer 13 and a secondary turn constituted by an electrically conducting thin layer 15. A thin layer 21 of a superconducting material is provided between the layer 3 and the said turns, or the turns are closely fitted together and made of a superconducting material themselves.