Method of and means for demonstrating evolution including chance
determinations

    公开(公告)号:US4030210A

    公开(公告)日:1977-06-21

    申请号:US445593

    申请日:1974-02-25

    IPC分类号: G09B23/36

    CPC分类号: G09B23/36

    摘要: A method of and means for demonstrating organic evolution, particularly as it involves the mechanism of natural selection. Background panels of multicolor and intricate design or pattern are used to provide simulated natural environments, and thin chips of different colors and shades -- and, in some instances, of different sizes and shapes -- are used to provide simulated animals or plants to be placed on the background panels. A population of a predetermined number of chips of a predetermined mixture of colors -- say, for instance, an equal number of from ten to twenty different colors -- is selected. The chips constituting the selected population are then spread in a single layer more or less uniformly on the surface of the background panel, and preferably in spaced relation, so that each chip is in plain view and is more or less detectible -- depending upon the color contrast existing between each chip, respectively, and the associated area of the background panel. Humans, for whom the demonstration is to be conducted, act as predators and remove from the panels a predetermined portion of the chips -- say, for instance, seventy-five percent of the total population placed on the panel. The surviving chips are then counted and noted for color, and each is reproduced in equal amount so as, for instance, to restore the original population. Reproduction is carried out by mating surviving chips and providing additional chips as simulated offspring, as are dictated by genetic demands, indicated on specially formed chips and the use of a chance device such as a specially constructed die or the like. Various aspects of natural selection may be demonstrated by this invention, including reproduction by monohybrid crosses, dihybrid crosses, and trihybrid crosses. The removal of chips as by predators, followed by reproduction for restoring the population, may be repeated any desired number of times.

    Nonvolatile writeable memory with preemption pin
    5.
    发明授权
    Nonvolatile writeable memory with preemption pin 失效
    具有抢占引脚的非易失性可写存储器

    公开(公告)号:US06201739B1

    公开(公告)日:2001-03-13

    申请号:US08717214

    申请日:1996-09-20

    IPC分类号: G11C1604

    摘要: A method and apparatus for preempting an operation in a nonvolatile writeable memory is performed using a pin. Preempting an operation is accomplished by either suspending the operation or by aborting the operation. Once an operation is suspended in the nonvolatile writeable memory, other operations can then be performed. Subsequently the suspended operation may be resumed.

    摘要翻译: 使用引脚执行用于抢占非易失性可写存储器中的操作的方法和装置。 通过暂停操作或中止操作来实现操作。 一旦在非易失性可写存储器中暂停操作,则可以执行其他操作。 随后可以恢复暂停的操作。

    Detachable fan blade platform and method of repairing same

    公开(公告)号:US10024177B2

    公开(公告)日:2018-07-17

    申请号:US13471718

    申请日:2012-05-15

    申请人: Charles W. Brown

    发明人: Charles W. Brown

    摘要: A fan section for a gas turbine engine includes a hub. A fan blade is secured to the hub. A platform is removably secured to the hub and is arranged adjacent to the fan blade. The platform has a body with lateral sides that each include a channel. A seal is removably received in each of the channels, with one of the seals abutting the fan blade. A method of repairing the fan blade platform includes the steps of removing a nose cone to provide access to a hub, detaching a platform from the hub, and pulling the seal from a groove in the platform.

    DETACHABLE FAN BLADE PLATFORM AND METHOD OF REPAIRING SAME
    8.
    发明申请
    DETACHABLE FAN BLADE PLATFORM AND METHOD OF REPAIRING SAME 有权
    可拆卸的风扇叶片平台及其修复方法

    公开(公告)号:US20130309073A1

    公开(公告)日:2013-11-21

    申请号:US13471718

    申请日:2012-05-15

    申请人: Charles W. Brown

    发明人: Charles W. Brown

    IPC分类号: F01D5/02 F16J15/32 B23P6/00

    摘要: A fan section for a gas turbine engine includes a hub. A fan blade is secured to the hub. A platform is removably secured to the hub and is arranged adjacent to the fan blade. The platform has a body with lateral sides that each include a channel. A seal is removably received in each of the channels, with one of the seals abutting the fan blade. A method of repairing the fan blade platform includes the steps of removing a nose cone to provide access to a hub, detaching a platform from the hub, and pulling the seal from a groove in the platform.

    摘要翻译: 用于燃气涡轮发动机的风扇部分包括轮毂。 风扇叶片固定在轮毂上。 平台可移除地固定到轮毂并且被布置成与风扇叶片相邻。 该平台具有侧面的主体,每个侧面均包括通道。 密封件可移除地容纳在每个通道中,其中一个密封件抵靠风扇叶片。 修理风扇叶片平台的方法包括以下步骤:去除鼻锥以提供对轮毂的接近,将平台与轮毂分离,以及从所述平台中的凹槽拉动密封件。