
A | DECATUR, Ga. -- A suburban Atlanta woman has been sentenced to 30 years in prison for the 2021 murder of a 4-month-old who died after she placed him to sleep on his abdomen in the child care center she operated out of her basement.A judge sentenced Amanda Hickey, 48, on Friday after families of children she was accused of abusing gave emotional testimony against her.”I know that there is nothing I can say in words to take away their pain, except take responsibility and express extreme sorrow for what I’ve done,” Hickey told DeKalb County Superior Court Chief Judge LaTisha Dear Jackson, according to The Atlanta Journal-Constitution. “This is my legacy now.”Charlie Cronmiller was being cared for in Hickey's Little Lovey child care center when he died on Feb. 3, 2021. Hickey didn't check on him for more than two hours before finding him covered in vomit and not breathing. The infant was pronounced dead at a hospital.Hickey operated the child care center from the basement of her Dunwoody home. She initially told investigators that she put the baby down on his back, in line with state regulations, but that the child rolled over onto his abdomen. Security video, however, showed Hickey actually placed the infant facedown.Video showed her swinging other babies by their feet, slamming them into the ground, pulling their hair, pushing and tripping toddlers, and placing others in unsafe positions for sleep, prosecutors said. The victims ranged in age from 6 to 18 months.Hickey was licensed to care for six children, but prosecutors said 10 were inside her home the day Charlie died.She pleaded guilty Sept. 22 to seven counts of first-degree child cruelty, seven counts of reckless conduct, one count of second-degree child cruelty and three counts of battery. Hickey entered an Alford plea, which allows a person to maintain her innocence while acknowledging that it is in her best interest to plead guilty to charges of second-degree murder and second-degree child cruelty related to Cronmiller's death. “There is no remorse,” the baby's mother, Stephanie Cronmiller, told the court Friday. “The only thing she’s sorry about is that she got caught. I focus on forgiving myself because I chose her. How could I not think this was my fault?”Hickey was taken into custody immediately after the hearing. Jackson ordered that once Hickey is released from prison, she can’t have contact with the victims or any children younger than 13, and can’t gain financially from the case.。1月11日:在当今快节奏的互联网时代,下载也面临着新的问题:使用机械硬盘的计算机“磁盘读写性能”无法跟上。当下载速度非常快时,使用机械硬盘的计算机可能会因为磁盘太忙而出现问题:下载速度突然减慢,计算机响应减慢,下载进度卡为99.9%。怎么了?迅雷官方解释了为什么下载速度突然减慢,电脑响应速度减慢,下载进度卡在99.9%等。下载速度突然减慢:迅雷下载文件时,为了避免频繁向磁盘写入数据,磁盘读写性能下降。

B | 因此,迅雷的下载引擎首先将下载的数据保存到计算机的内存中。当积累了足够的数据时,它们会一起写入磁盘。这是迅雷下载引擎的“磁盘缓存”功能。由于通过网络下载数据比将数据写入磁盘慢,因此可以确保池中的水不会溢出。但是如果池溢出,就会引起问题。

C | 它体现在迅雷的下载引擎中,会导致程序崩溃等异常现象。近年来,随着网络带宽的增加,下载数据的速度开始出现快于将数据写入磁盘的速度。当迅雷的下载引擎发现磁盘缓存快满时,它会自动降低下载数据的速度。让下载的数据尽快写入磁盘,在腾出足够的缓存空间后恢复原来的下载速度。如果您的计算机使用的是机械硬盘,并且正在高速下载,下载速度会突然减慢。可能这就是原因。电脑反应慢下来:要深入了解这个问题,我们必须从“机械硬盘”的“先天缺陷”开始。

D | 首先看一张机械硬盘拆卸图。当“机械硬盘”读写数据时,上图中的“音圈电机”转动“磁头摆臂”,使摆臂顶端的“磁头”从“磁盘”表面高速飞行约1纳米,在“磁盘”上读写数据。圆盘的表面看起来像一面镜子,实际上是由环连接的“轨道”组成的。

E | 当需要读写的数据存储在磁盘的不同“磁道”上时,磁头摆臂在磁盘上来回摆动,使磁头在存储相应数据的磁道上飞行。这种行为被称为“寻找”。

F | 由于头部摆臂是由音圈电机控制的纯机械结构,因此从发出指令到摆臂完成跟踪的响应时间约为10毫秒。相比之下,机械硬盘磁头当前位置数据的读写时间仅为寻道时间的0.1%,频繁的寻道操作会降低机械硬盘的响应速度。这种“先天性缺陷”创造了机械硬盘的一个主要特征(随机读写比顺序读写慢得多)。

G | 例如,顺序读写的速度可以达到100Mb/s,但随机读写的速度只能达到500kb/s,仅为顺序读写的0.5%。理想情况下,当迅雷高速下载数据时,机械硬盘会努力将迅雷下载的数据写入磁盘。但事实上,计算机中不仅运行一个软件。

H | 其他软件,包括操作系统,也会产生读写磁盘的需求。其它软件读取和写入的磁盘数据往往位于其它磁道上,这将频繁地触发机械硬盘的“寻道”操作。因此,机械硬盘陷入了“随机读写”的泥潭,这不仅降低了霹雳的数据写入速度,而且降低了用户在计算机上操作其他软件时的整体响应速度。

I | 很多网友不知道99.9%的人下载了进度卡。事实上,在下载数据的过程中,迅雷会实时检查下载的数据,避免下载错误的数据。数据验证过程需要一定的时间才能完成。幸运的是,在大多数情况下,数据的下载速度比数据验证的速度慢。因此,当数据下载完成后,验证数据的过程也可以同时完成。下载任务能够顺利完成。但是,当网络下载数据的速度超过数据验证的速度时,等待验证的数据将生成积压。下载的文件越大,下载速度越快,需要验证的数据积压越多。此时,如果添加前两个问题,则检查积压数据的速度将变慢。当下载任务的文件数据已经下载,但仍有大量未更正的数据积压时,迅雷的下载引擎会将任务调度保持在99.9%,直到所有下载的数据都被检查完毕,任务才会被下载。所以当你观察到迅雷有很快的下载速度时,却突然失去了速度,当任务进度达到99.9%时,迅雷上出现“磁盘忙”的提示,这可能就是为什么。然而,应该注意的是,还有许多其他原因可能导致99.9%的下载进度卡,这只是其中之一。
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