Abstract:
This invention relates to a class of heterocycles and their metal complexes, and is particularly concerned with the use of these compounds in the preparation of prodrugs or as prodrugs that may be activated under hypoxic conditions by enzymes or by therapeutic ionising radiation, in the treatment of cancer. The invention also relates to the use of these heterocycles and the corresponding metal complexes in the preparation of medicaments and to compositions including the heterocycles or their metal complexes and to methods for preparing these compounds.
Abstract:
A method is provided for repairing a defect in a noise suppression panel. The method may be used to repair defects in a panel that may occur during the manufacture of or normal use of the panel. The method includes the steps of removing the defect from the noise suppression panel to create a cavity therein, forming material comprised of a material having acoustic damping properties into an insert configured to mate with the cavity, and placing the insert into the cavity.
Abstract:
A network management apparatus and method for identifying an event which is indicative of the underlying cause of more than one of a plurality of events detected by a network management station on a network is described in which the management station has knowledge of the topology of the network. Using the topology of the network, the apparatus and method considers the location of the network device causing each event in the plurality of events, and determines as the causal event, the event which has occurred at a location closest to the network management station. The method is preferably implemented in the form of a computer program.
Abstract:
A network management apparatus and method for determining an optimum threshold value for a monitored characteristic of a network is described. The optimum threshold value is determined by counting a number of previously received events generated from values for a monitored characteristic which were above or below an existing threshold value for the monitored characteristic, and determining the optimum threshold value in dependence on the counted number. An optimum threshold value is provided, which is tailored to suit the network concerned.
Abstract:
A guitar bridge bias converter is described which provides the means of converting a right-handed steel strung electric or acoustic guitar to a left-handed instrument. The bridge bias converter for an acoustic guitar consists most simply of an integral one-piece unit comprising a central plate, a lower tongue, and an upper bridge-bone. The tongue locates in the groove vacated by removal of the original right-handed bridge-bone. The plate sits on top of the bridge and the bridge-bone is situated on the plate at an angle which is diametrically opposed to the original bridge-bone. This has the effect, in conjunction with reversal of the string positions, of converting the guitar from right-handed to left-handed playing. An alternative embodiment appropriate to conversion of electric guitars is also described, comprising a replacement bridge block incorporating mounting hole protrusions so offset as to convert the instrument from right-hand to left-handed string bias. It is an important feature of the invention that it requires no change to the body of the instrument and that the conversion process is completely reversible.
Abstract:
A dual-in-line package (DIP) for a bubble memory is achieved by mounting the bubble chip in a cantilevered position in the plane of a rigid conductor arrangement which is interconnected to a DIP base. The lead track arrangement forms a rigid support for the chip fixing the chip in a position for receiving the orthogonal coils which characteristically supply the rotating field for field-access bubble operation.
Abstract:
When testing network management applications, it is desirable to show that they will work with large or very large networks, to determine the upper bounds of the applications capabilities, and improvements which might increase the upper bounds. A method of testing a network application is disclosed mapping a layer-3 addresses of a real subnetwork onto a plurality of mapped layer-3 subnetwork addresses for conversations with applications or devices. Packets are modified to change a destination layer-3 address in a mapped subnetwork, pointing to corresponding real IP address and forwarding the packets. The conversation to which a response from a reallayer-3 address relates is identified. The source layer-3 address and packet contents are changed into the appropriate mapped subnetwork and the packet is forwarded to the application or device. An existing test network of any size may be used as the basis for testing the network management application.
Abstract:
A network management apparatus and method processes network management data received during the monitoring of a network and generates events for presentation in an event list to a user when certain event conditions are detected. Network management data received in relation to an event condition is processed to determine whether it represents a recurring event condition. A recurring event condition is determined if a predetermined number of equivalent events have been generated, and appear in the event list, in an immediately preceding time period. In the described embodiment, if a recurring event condition occurs, a recurring event is generated, and subsequent occurrences of the event condition are not included in the event list presented to the user.