• We study the principles of modern operating systems, including the management of resources including volatile memory (RAM, virtual memory), persistent memory (disk, filesystems), and network communication.

• Our study of network communication will include the OSI model, Ethernet, TCP/IP, and DNS.

• We will particularly emphasize concurrency in parallel and distributed systems, including abstract synchronization models, threads, message-passing systems, and MapReduce.

There is no particular textbook, though some informal notes will sometimes be placed on the class Web page. If you want a book, I can recommend Anderson and Dahlin, Operating Systems: Principles and Practice, Recursive Books, 2011.

www.cburch.com/cs/420/

There are a total of 1,000 points over the semester. Letter grades will be assigned with cutoffs at 900 for an A, 800 for B, 700 for C, and 600 for D.

Class attendance/participation	60 pts
Assignments (6–8)	490 pts
Tests (three, 100 pts each)	300 pts
Final	150 pts
TOTAL	1,000 pts

I reserve the right to make adjustments in the entire grading scheme or in particular cases.

I do not normally curve grades at the end of the course; instead, I monitor your progress and perform any curves as I grade tests. When I curve test scores, I add a fixed amount to all scores; as a result, some test scores may end up being above 100%. I anticipate, but will not insist, that the median test score will be around 75%. Normally, scores in the non-test categories will be higher; the average class grade will likely be a B even though the average test grade is a C.

Several points are designated for class participation. I will assign half of these points near the semester's middle, and the other half near the semester's end.

I do monitor your class attendance. If your attendance is excellent (missing one or fewer classes each half-semester), you will receive at least 60% of these attendance/participation points. If you feel your absence should be excused, please warn me about the absence a day in advance. Whether I excuse your absence is my call.

The remaining 40% of these points are for participation, including both questions during class and responses to questions during class. I may give more than full credit in unusual circumstances. Take this as an invitation: I value your active participation in class, and I expect you to show evidence of being fully tuned in during class sessions.

Assignments will be posted irregularly, with due dates at least a week from when they are distributed. For each 24-hour period after the time due, I will deduct up to 10% of the points possible.

For most assignments (when teamwork is unspecified), you may feel free to work alone or with one other student. If you work with somebody else, you should jointly submit a single solution. I reserve the right to change this policy, individually or collectively, at any time.

You may also ask occasional questions of classmates when you need help, but no solutions (even if only partial) should be passed between students (or teams). Under no circumstances should I receive two copies of identical or near-identical solutions.

The Linux laboratory computers are the official testbed for your solutions. Even if your solution works on another computer, your program has failed if it does not work on these. (Note our Linux network policies.)

The scheduled days for tests, listed below, will likely not change.

Wed 18 Sep	Test 1
Wed 16 Oct	Test 2
Wed 13 Nov	Test 3
Tue 17 Dec	Final, 9:00am

If you miss a test, you must receive advance permission from me to receive more than a 0. (Dire medical emergencies usually constitute an exception.) If you are excused from the test, I will either double your lowest quiz or exam score or administer a make-up, at my discretion. Let me know well in advance — 24 hours for exams and quizzes, and two weeks for the final. I would like to remind you that, when e-mail is impossible, telephones exist also. Do not skip a test without my prior approval!

Note that I may require you to document your reason for absence. Travel arrangements and work schedules are not adequate reasons to miss a test.

You must properly attribute any work or ideas you use in assignments for this course which are quoted or derived from others. Plagiarism includes not only copying the ideas and the written and spoken words of others, but also copying or otherwise appropriating their computer files as well. Interfering with the work of others is also a serious academic offense. I will abide by the catalog's Academic Honesty policy in referring cases to the college's Committee on Academic Integrity.

Discussing or viewing others' solutions to assignments is officially out of bounds, as is discussing or showing your own solution to others. In practice, I realize, you may help other students; this presents a problem only when the solution you submit is substantially similar to another student's. A strong correlation between your solution and a classmate's solution constitutes evidence of cheating.

Feel free to stop by my office any time you want to talk about something related to the class. I have listed office hours, but they are not intended to limit you. The office hours represent when I will try to be available in my office, but I'm equally available at all times that my office door is open. I'm also happy to arrange appointments.

If you're not in the building, feel free to telephone my office. And if I'm not in my office, you can send e-mail. But please try to contact me directly before asking questions via e-mail: E-mail is much less efficient.

Most Hendrix students intuitively know the appropriate bounds for behavior in class. But: Cellphone use is prohibited during class, even if calls are received outside the classroom, and even if it is only text-messaging. Use of laptops is restricted to activities directly related to what is currently being discussed; I reserve the right to prohibit them if I feel this policy is being abused.

Any inappropriate use of electronic devices (or of reading materials) is worse than an absence, since it distracts other students. It will count accordingly in the attendance/participation policy; you could potentially receive a negative score.

On tests, no electronic devices other than a simple watch are permitted.

It is the policy of Hendrix College to accommodate students with disabilities, pursuant to federal and state law. Any student who needs accommodation in relation to a recognized disability should inform the instructor at the beginning of the course. Students should contact Julie Brown in Academic Support Services (505.2954; brownj@hendrix.edu) to begin the accommodation process.