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    Chromatography columns
    13.
    发明授权
    Chromatography columns 失效
    色谱柱

    公开(公告)号：US4497711A

    公开(公告)日：1985-02-05

    申请号：US524073

    申请日：1983-08-17

    Applicant: David Shepherd

    Inventor： David Shepherd

    IPC: B01D15/08 ,  G01N30/56

    CPC classification number: G01N30/56 ,  G01N2030/565

    Abstract: A method for packing a chromatography column having an inlet port at one end and an outlet port at the other, comprises feeding a slurry or smoke of particulate bed material in a carrier fluid and applying a predetermined pressure to the bed material while allowing the carrier fluid to escape, wherein both the inlet and outlet ports are protected by porous bed-retaining means positioned apart to provide a space for the bed between them, at least a final portion of the slurry or smoke being fed through a filler tube into the space for the bed until the space is full and the bed extends back into the filler tube, predetermined pressure to the bed being applied via the slurry or smoke in the filler tube, and the filler tube then sealed being against relaxation of the bed pressure.

    Abstract translation: 一种用于填充具有一端的入口和另一端的出口的色谱柱的方法包括将载体流体中的颗粒床材料的浆料或烟雾供给到床材料中，同时允许载体流体 其中入口端口和出口端口都被多孔床保持装置保护，所述多孔床保持装置被分开设置以为它们之间的床提供空间，浆料或烟的至少最后部分通过填充管进入到空间中 床直到空间充满并且床延伸回到填充管中，通过填料管中的浆料或烟雾施加预定的压力，并且填充管然后被密封以防止床压力的松弛。

    Production of zeaxanthin
    15.
    发明授权
    Production of zeaxanthin 失效
    玉米黄质的生产

    公开(公告)号：US3951743A

    公开(公告)日：1976-04-20

    申请号：US489725

    申请日：1974-07-18

    Applicant: David Shepherd ,  Jaroslav Dasek ,  Mariette Suzanne Catherine Carels

    Inventor： David Shepherd ,  Jaroslav Dasek ,  Mariette Suzanne Catherine Carels

    IPC: A23K1/00 ,  C12P23/00 ,  C12R1/20 ,  C12D13/02

    CPC classification number: C12P23/00 ,  Y10S435/85

    Abstract: A process for the preparation of zeaxanthin which comprises culturing a microorganism of the genus Flavobacter producing this pigment in a nutrient medium containing at least one carbohydrate as assimilable carbon source, at least one source of assimilable amino nitrogen containing free amino acids, mineral salts, oligoelements and vitamins, the composition of the medium being modified by adding pyridoxine to it, and continuing culturing until a substantial quantity of intracellular zeaxanthin has been obtained.

    Abstract translation: 一种玉米黄质的制备方法，其包括在含有至少一种碳水化合物作为可同化碳源的至少一种含可游离氨基酸的可吸收的氨基酸源，无机盐，寡糖类的培养基中培养产生该颜料的黄杆菌属的微生物 和维生素，通过向其中加入吡哆醇来修饰培养基的组成，并继续培养直到获得了大量的细胞内玉米黄质。

    COMPLEXITY MANAGEMENT IN A MULTI-USER COMMUNICATIONS SYSTEM
    18.
    发明申请
    COMPLEXITY MANAGEMENT IN A MULTI-USER COMMUNICATIONS SYSTEM 审中-公开
    多用户通信系统中的复杂性管理

    公开(公告)号：US20110164517A1

    公开(公告)日：2011-07-07

    申请号：US12989938

    申请日：2009-04-28

    Applicant: David Shepherd ,  Mark Reed ,  Zhennig Shi

    Inventor： David Shepherd ,  Mark Reed ,  Zhennig Shi

    IPC: H04L12/26

    CPC classification number: H04L1/0048 ,  H04B1/707 ,  H04B2201/70707 ,  H04L1/005 ,  H04L25/03331 ,  H04W52/346 ,  H04W72/1205

    Abstract: The invention concerns complexity management of a receiver in a multi-access/user communication system where interference exists. For example, but not limited to, multi-user detection at the receiver in the uplink of a code division multiple access DS/CDMA system. The invention provides a method for power management and decoding schedule optimisation by deriving (40) an extrinsic information transfer (EXIT) function for an interference canceller and a plurality of decoders. Then, determining (42) a power level for each of the plurality of users based on the derived EXIT functions; and then deriving (44) a decoding schedule for the plurality of decoders based on the derived EXIT functions and determined power levels. It is an advantage of the invention that optimization is broken into two parts. There is no trade-off between computational complexity (number of iterations) and the improvement in bit error rate performance at a given signal-to-noise ratio. Using the invention, large gains in receiver sensitivity (i.e. in power efficiency and/or spectrum efficiency therefore reducing interference from the terminals) and computational complexity can be achieved simultaneously.

    Abstract translation: 本发明涉及存在干扰的多址/用户通信系统中的接收机的复杂度管理。 例如但不限于在码分多址DS / CDMA系统的上行链路中的接收机处的多用户检测。 本发明提供一种通过导出（40）干扰消除器和多个解码器的外在信息传输（EXIT）功能来对功率管理和解码进度优化的方法。 然后，基于导出的EXIT功能确定（42）多个用户中的每一个的功率电平; 然后基于导出的EXIT函数和确定的功率电平导出（44）多个解码器的解码调度。 本发明的优点是将优化分为两部分。 在给定的信噪比下，计算复杂度（迭代次数）和误码率性能的改善之间不存在折衷。 使用本发明，可以同时实现接收机灵敏度（即，功率效率和/或频谱效率，从而减少来自终端的干扰）的大增益和计算复杂度。

    Disc player improvements
    19.
    发明授权
    Disc player improvements 失效

    公开(公告)号：US07024674B2

    公开(公告)日：2006-04-04

    申请号：US10289195

    申请日：2002-11-06

    Applicant: David Shepherd ,  Andrew Evans

    Inventor： David Shepherd ,  Andrew Evans

    IPC: G11B7/08

    CPC classification number: G11B33/08 ,  G11B17/0405 ,  G11B17/051 ,  G11B33/025

    Abstract: A disc player that incorporates a single piece disc enclosure and a chassis section is described. The incorporation of the disc enclosure and the chassis section into a single piece eliminates the requirement for a separate damping system. As well as reducing the cost of manufacturing the device this also allows for the tolerance between the spindle motor and the disc enclosure to be precisely controlled so enabling miniaturization of the disc player.

    Red pigment production
    20.
    发明授权
    Red pigment production 失效
    红色素生产

    公开(公告)号：US4145254A

    公开(公告)日：1979-03-20

    申请号：US800354

    申请日：1977-05-25

    Applicant: David Shepherd ,  Mariette S. C. Carels

    Inventor： David Shepherd ,  Mariette S. C. Carels

    IPC: C09B61/00 ,  C12P1/02 ,  C12D13/02 ,  A23L1/27

    CPC classification number: C09B61/00 ,  C12P1/02 ,  Y10S435/911

    Abstract: A process for producing a Monascus pigment by growing a microorganism of the genus Monascus in an aqueous nutrient medium under aerobic conditions. The microorganism is grown at a pH-value in the range from 4 to 7 in a first medium which promotes its growth; a first biomass is obtained; the first biomass thus obtained is transferred to a second medium which stimulates the production of pigment; the pH is adjusted to a value in the range from 2 to 4; the growth process is continued for a period of 2 to 7 days at a temperature in the range from 20.degree. to 35.degree. C. and pigment is extracted with a solvent from the second biomass obtained.

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