I'm not an expert on crypto, but it seems to me that, for instance, SHA-512/256 would not produce the same digest from the same input as SHA-256. I just conducted the following test on the linux command line:
$ echo hello | sha512sum
e7c22b994c59d9cf2b4 8e549b1e24666636045 930d3da7c1acb299d1 c3b7f931f94aae41edd a2c2b207a36e10f8bcb 8d45223e54878f5b316e 7ce3b6bc019629 -
$ echo hello | sha256sum
5891b5b522d5df086d0ff 0b110fbd9d21bb4fc716 3af34d08286a2e846f6be03 -
The first is the SHA-512 hash of the word "hello" (with spaces inserted to defeat the slashdot lameness filter) and the second is the hash for SHA-256. I don't see any way to truncate the the 512-bit output and get one that matches the 256-bit output. Therefore SHA-512/256 would not be compatible with plain SHA-256.
I don't see much utility in these new algorithms. Since we would already be calculating the 512-bit hash, why not just use it instead of truncating it? I suppose there are a few situations where for externally imposed reasons you just need a value of a certain length, but that's about it.
They can't dump the responsibility on the patient, especially by shoving an informed consent form under his hand in the 15 minutes before surgery.
Oh yes they can (legally speaking)
This is a very questionable statement, and depends a lot on the locale and the situations of the case. Contractually waiving your rights is something that the courts often frown upon.
Here is my experience. I live in California, and my old apartment was accidentally burned down by a maintenance worker who was not qualified to do the task he had been assigned. The landlord refused to reimburse me for my lost property, because I had signed a lease waiving my right to damages in such a case. I contacted a lawyer, who told me that one can't contract away responsibility for one's own negligence. The landlord was clearly negligent in the case, and the waiver clause in the lease would not hold up in court. I hired the lawyer, and we successfully sued the landlord
Taco Bell ingredients are great for quickly passing through your pipeline
That's why one of my friends calls the place Taco Bowel. It's much more descriptive than the commonly-heard Taco Hell.
"Who alone has reason to *lie himself out* of actuality? He who *suffers* from it." -- Friedrich Nietzsche