摘要:
The disclosure relates generally to stem cell biology and more specifically to genetic manipulation of stem cells. Methods and compositions using recombinational cloning techniques are disclosed which allow the construction and insertion of complex genetic constructs into embryonic and adult stem cells and progenitor cells. The methods disclosed will allow the harvesting of adult stem cells pre-engineered with integration sites to facilitate early passage genetic modification.
摘要:
A system and method for efficiently processing and managing data stored in a queue. A processing device may process the data stored in the queue. Queue protocols can be applied to the queue to efficiently process and manage data stored in the queue. Queue protocols may facilitate efficient use of processing resources that process the data stored in one or more queues. A queue protocol may include at least a first protocol for facilitating transfer of data in the queue to another queue processed by another processing device or a second protocol for inhibiting transfer of data in the queue to another queue.
摘要:
Systems and methods are described for processing queue data and for providing queue messaging over a network. An illustrative queuing system includes a first queue configured to hold resource requests from a plurality of users, and program code stored in computer readable memory configured to determine or estimate whether a resource requested by a first resource request submitted by a first requester will be available when the first resource request will be serviced, and to transmit a message over a network to the first requester indicating that the requested resource will not be available when the queued request is serviced if it is estimated or determined that the requested resource will not be available when the first request is serviced.
摘要:
Systems and methods are described for processing queue data and for providing queue messaging over a network. An illustrative queuing system includes a first queue configured to hold resource requests from a plurality of users, and program code stored in computer readable memory configured to determine or estimate whether a resource requested by a first resource request submitted by a first requester will be available when the first resource request will be serviced, and to transmit a message over a network to the first requester indicating that the requested resource will not be available when the queued request is serviced if it is estimated or determined that the requested resource will not be available when the first request is serviced.
摘要:
A method and apparatus for the conditioning of articles. According to one aspect of the invention, a conveyor conveys articles in a conveying direction along a path. A rotatable belt assembly extends adjacent to the path. The rotatable belt assembly includes a belt having a conditioning run extending generally in the conveying direction to contact articles being conveyed along the path. The belt is mounted so that it is capable of displacement to vary the spacing of the conditioning run from the conveying path. The rotatable belt assembly moves vertically and/or with a rocking movement to condition the articles contacted by the conditioning run. The speed of rotation of the rotatable belt assembly may be varied to adjust the spacing between the articles being conveyed.
摘要:
Systems and methods are described for processing queue data and for providing queue messaging over a network. An illustrative queuing system includes a first queue configured to hold resource requests from a plurality of users, and program code stored in computer readable memory configured to determine or estimate whether a resource requested by a first resource request submitted by a first requester will be available when the first resource request will be serviced, and to transmit a message over a network to the first requester indicating that the requested resource will not be available when the queued request is serviced if it is estimated or determined that the requested resource will not be available when the first request is serviced.
摘要:
Systems and methods are described for processing queue data and for providing queue messaging over a network. An illustrative queuing system includes a first queue configured to hold resource requests from a plurality of users, and program code stored in computer readable memory configured to determine or estimate whether a resource requested by a first resource request submitted by a first requester will be available when the first resource request will be serviced, and to transmit a message over a network to the first requester indicating that the requested resource will not be available when the queued request is serviced if it is estimated or determined that the requested resource will not be available when the first request is serviced.
摘要:
A spectroscopy method in which a sample is scanned without moving the sample. Light from the sample 16 is collected by a lens 14 and analyzed at a spectrum analyzer 28 before being focused onto a photodetector 32. Light from the focal point of the lens 14 is brought to a tight focus on the photodetector 32 whilst light from in front of or behind the focal point comes to a more diffuse focus. Light from the pixels on the photodetector 32 corresponding to the focal point of the lens 14 is processed, whilst light from pixels outside this region is ignored, thus forming a ‘virtual slit’. The sample 16 is scanned in a vertical direction by moving the ‘virtual slit’ up and down, by changing the designated rows of pixels from which data is analyzed. The sample is scanned in a horizontal direction by moving a vertical slit 24 in the light path in a horizontal direction.
摘要:
A spectroscopic probe includes a monolithic block (10) of transparent material and GRIN lenses (20, 22, 24). Light for illuminating a sample is delivered by an optical fiber (31), and light scattered by the sample is output by an optical fiber (33). The block (10) has opposing angled faces (12A, 12B), coated with a dichroic filter coating and a reflective coating respectively. A method for making blocks (10) is also disclosed, in which the coatings are first provided on a large sheet, and blocks (10) are then cut from the sheet using angled cuts. Since the coated block reduces the number of components required, the probe can be miniaturized, e.g. for use in an endoscope.
摘要:
A hopper for a weighing machine which has a tubular body and a closing valve which is comprised of several plates which are pivotably mounted around the bottom of the hopper for movement in a plane transverse to the axis of the hopper. The plates are simultaneously driven between open and closed positions by a common belt or chain so that the closing forces of the plates are balanced. The belt is coupled to a driving mechanism through a lever mounted on the hopper which disconnects from the driving mechanism when the plates are fully closed so that the hopper is freely suspended for weighing purposes. The plates scrape against the bottom of the hopper when opening so that material clinging to the plates is scraped off.