Swarf is a word for metal particles or debris produced in polishing metal with abrasive tools. For example, swarf can be produced when polishing teppanyaki grill or sharpening knives.  I often see Kebab sellers who don't wipe their knives after sharpening and cut cooked meat.  Teppanyaki grills are often polished but without washing them thoroughly. Without any doubt many people still consume such contaminated food as if it is safe.  Is it safe to eat food contaminated with swarf? Is there any scientific article that support the conclusion?
I've been wondering about this for a while, since getting interested in knife sharpening.  When using a knife, it will get duller. One (the primary) reason being that you "bend" the edge. You fix this using a honing steel.  After a while though, you need to sharpen the knife again.  Another setting: If you have a brittle knife and/or mistreat your knife you will chip it.   As far as I can tell, this should mean that small pieces of metal (dust, shavings, etc.) come lose, and then likely get in the food.  Is this correct? Are there no health considerations when digesting small pieces of very sharp metal?
I launch a batch which call a lot of scheduled job. But I reach the governor limit :     Maximum number of Apex classes scheduled concurrently : 100   I'm wondering what happens when this limit is reached. The next scheduled jobs are waiting the number of scheduled jobs is lower than 100 for being executed or are they all cancelled ?  And is there to way to manage the number of scheduled jobs to avoir reaching this limit ? For example wait before schedule a new job if we are near the limit. How can I run blender from command line or a python script without opening a GUI? I'm interested in using Blender for producing images, 3d files, or calculating geometry on a server.  Can I make blender run a python script without opening a GUI?  If not, can I incorporate Blender's python API into my own python script without running a GUI? Example of a ring without Invariant Basis Property Difference between "speed up something" and "speed something up" Both seem to be in common usage, but is there a nuanced difference about when one is more appropriate than the other? Thanks. Desktop doesn't remember brightness settings after a reboot Every time I reboot my machine the brightness goes back to 100% in Gnome. I wish it would keep the last setting. Is there anyway? Let's say that a player uses the ready action and says "If a character aims at me with a weapon, I'll use Teleport to move behind cover."  What happens? Does this work? If not, please cite the rules to explain why not. I have a PC who wants to jump onto an enemy in a combat situation. The player wants him to land on the (humanoid) enemy, sword drawn, and use the enemy to break his fall while plunging shortswords into it. I thought of using a straight attack roll, because it was only a 12 foot drop from the ledge to the top of the enemy. But I would imagine a lot would depend on the distance, and also whether the enemy might suspect such an attack. Also, I would expect the PC would take damage on a miss, but how about on success? Recognize this letter Does anybody know how to make the following symbol in LaTeX? I think it is some calligraphic \mathcal{E}.     It is not anywhere in  and online font recognizers do not recognize it.   The general font in the book I got this symbol from, Introduction to Quantum Optics by Grynberg, is not very extraordinary: this is a formula containing the strange symbol: For whatever reason, we do no longer need to be root (or using sudo) to run /sbin/shutdown, /sbin/reboot etc.  This seems to be because those executables are now symlinks to /bin/systemctl which handles everything as normal user.  However, what if I want shutdown and reboot to require root authentication again? How can I achieve this? Is there any way to kill a Thread? What are the possible values of the Hibernate hbm2ddl.auto configuration and what do they do I really want to know more about the update, export and the values that could be given to hibernate.hbm2ddl.auto I need to know when to use the update and when not? And what is the alternative?  These are changes that could happen over DB:   new tables new columns in old tables columns deleted data type of a column changed a type of a column changed its attributes tables dropped values of a column changed    In each case what is the best solution? I am using tufte-latex package, which uses mathpazo with old style numerals. To make figures (plots) I would like to use lining numbers.  The problem is that the figures are converted from svg to pdf using inkscape and the numbers are not in mathmode (In math mode the numbers are lining numerals by default).  I think of two possible solutions:  a) Is there any command similar to \oldstylenums that does the opposite work?  b) inkscape put the text of the figure in \smash{-22.22} commands. Is any way,  using sed, awk, perl,... to change that to \smash{$-22.22}? How to escape braces (curly brackets) in a format string in .NET What's the regular expression that matches a square bracket? Projection on the hyperplane $H: \sum x_i=0$ Consider the hyperplane $H: \sum_{i=1}^n x_i=0$. Let $P$ denote the orthogonal projection onto $H$. What exactly is the matrix $P$ and how do we find it? Singular or plural "set"? How do you display the archives of a Custom Post Type by Year &amp; Month? I need to build a list of files present in a directory but also pass in a file containing a list of directories to exclude.  I've seen the below suggestion but I've had no luck with it when it comes to the type flag:  find $dir_name $(printf "! -name %s " $(cat $exclude_file))   Is there a way I can do it or will I need to create the entire list and then work through it removing ones that partially match ones in the exclude directory. notify-send not working under ssh Maybe this is answered somewhere else, but I didn't see it.  I am running Ubuntu 14.04. When I SSH into my machine, for example:  ssh &lt;user&gt;@&lt;machineip&gt; notify-send "Hello"   I don't see anything on the monitor where I am logged into the machine. If I prefix notify-send with DISPLAY=:0.0 or DISPLAY=:0 nothing different happens. I just never see any notification on the current session.  Is there some trick/switch to getting this working?  In case this isn't clear, allow me to reiterate: From Computer A, I SSH into Computer B. Within the SSH session, I wish to execute notify-send to run on Computer B. I expect a growl-type notification to appear on the monitor of Computer B. How to hide TabPage from TabControl