Announcements
5/15/2018: Grade distribution for final exam:
5/6/2018: Office hours during final exam week:
| Mon | Tu | Wed | Th | Fri | |
| 2pm-3pm | Section (Prof Xu) | Bower | |||
| 3pm-4pm | Bower | Bower | Bower | Bower | |
| 4pm-5pm | Bower | Bower | Bower | ||
| 5pm-6pm | Bower | Bower | Bower | ||
| 6pm-7pm | Odysseus | Fernanda | Shaghayegh | Yixiang | |
| 7pm-8pm | Odysseus | Fernanda | Shaghayegh | Yxiang | Max |
5/3/2018: Solar Car Test Results:
| Slope (deg) | 0 | 2.5 | 5 | 7.5 | 10 | 12.5 | 15 | 17.5 | 20 | Steepest slope | |
| Best speed (cm/s) | 179 | 226.2 | 144 | 170 | 119 | 87.2 | 58.3 | 65.1 | 51.1 | 51 | |
| Group | Mass | - | - | - | - | - | - | - | - | ||
| 28 | 260 | 23.6 | - | - | - | 25 | - | - | - | - | 15 |
| Group 2 | 206 | - | 226.2 | 144 | 170 | 119 | 87.2 | - | - | - | 45 |
| 14 | 305 | - | 79.1 | 66.7 | 62.9 | 53.7 | 60.8 | - | - | - | 27.5 |
| 12 | 336 | - | 48.7 | 38.9 | 40.33 | 39.8 | 35.2 | - | - | - | 15 |
| 20 | 340 | 111 | - | - | 44.4 | - | - | 46.3 | - | - | 25 |
| Group 11 | 387 | - | - | - | 79.4 | 92.6 | 56.8 | 38.5 | 34.7 | - | 27.5 |
| Group 6 | 305 | 87 | 86 | 58 | 46 | - | - | - | - | - | |
| Tank Treads (Group 7) | 245 | - | 128.8 | 83.1 | 73.2 | 67.2 | - | 54.1 | - | - | 30 |
| 22 | 335 | - | 20 | - | - | 17 | - | 12 | - | 17.5 | |
| 17 | 540 | - | - | 37 | 35 | 34 | 33 | 33 | - | - | 15 |
| Vroom vroom VROOM (group 9) | 301 | 83.82 | - | - | - | 73.45 | 50.24 | - | - | 40 | |
| Group 8 | 269 | 79.4 | 70.6 | 56.9 | 58.2 | - | 46.2 | - | - | - | 20 |
| Group 5 | 369 | - | - | 63 | 59 | 43 | 43 | 43 | - | - | 25 |
| Group 30 The AveNgers | 306 | 52.3 | - | 28.18 | - | 21.25 | - | - | - | - | 10 |
| Group 25 | 356 | 59.5 | 38.83 | 67.79 | - | 45.19 | 38.7 | - | - | - | 15 |
| Solar Car: Nothing is faster than the speed of light | 217 | 95 | - | - | - | - | - | 50 | - | 38 | 40 |
| Group 3 | 270 | 94 | - | 82.7 | - | 56.4 | - | 22.7 | - | 23 | |
| LAMP! (#15) | 205 | 29.5 | 23.7 | - | 27.9 | 14.9 | - | - | - | 17.5 | |
| Group 4 | 400 | - | 52 | - | 48.4 | - | 47 | 41.5 | - | 24.6 | 20 |
| Group 2 | 206 | 179 | - | - | - | - | - | 58.3 | 65.1 | 51.1 | 51 |
| - | - | - | - | - | - | - | - | ||||
| Averages | 307.9 | 85.9 | 85.23 | 57.27 | 66.63 | 51.69 | 46.9 | 46.1 | 33.63 | 37.9 | 25.21 |
Comparison of measured and predicted average speeds (using 307 gram car mass and 20% efficiency). The data shows the average car speeds for the past 4 years.
5/3/2018: Solar Car Project Reporting: After your tests, please fill out:
4/26/2018: Solar Car Project TA/faculty office hour schedule: The Brown Design Workshop will have a TA or faculty member present at the times indicated below.
If you plan to work on the solar cars on Sunday please sign up here to let the TAs know - they won't open the lab if nobody is signed up.
| Solar Car | |||||
| Sun Apr 29 | Mon Apr 30 | Tues May 1 | Wed May 2 | Thurs May 3 | |
| 9am-10am | XXXXXXXXXX | AFB | AFB | AFB | AFB |
| 10am-11am | XXXXXXXXXX | AFB | AFB | AFB | AFB |
| 11am-noon | Griffin | Yixiang | Yixiang | ||
| noon-1pm | Griffin | AFB | AFB | AFB | AFB |
| 1pm-2pm | Rohan/ | JX | AFB | JX | AFB |
| 2pm-3pm | Rohan | JX | Michelle | JX | AFB |
| 3pm-4pm | Rohan | AFB | Michelle | AFB | AFB |
| 4pm-5pm | Avery | Paula | Fernanda | AFB | AFB |
| 5pm-6pm | Avery | Paula | Fernanda | AFB | AFB |
| 6pm-7pm | Avery | Noe | Fernanda | Odysseas | Rohan |
| 7pm-8pm | Paula | Max | Qi | Odysseas / Shagha | |
| 8pm-9pm | Paula | Max | Qi | Odysseas / Shagha | Noe / Yixiang |
| 9pm-10pm | Max | Qi | Walker | Noe | |
You can reserve quadcopter test-stands here
| Quadcopter | ||||||
| Sun Apr 29 | Mon Apr 30 | Tues May 1 | Wed May 2 | Thurs May 3 | Fri May 4 | |
| 9am-10am | XXXXXXXXXX | AFB | XXXXXX | AFB | XXXXXXXXXX | |
| 10am-11am | XXXXXXXXXX | AFB | XXXXXX | AFB | XXXXXXXXXX | |
| 11am-noon | Linda | |||||
| noon-1pm | AFB | AFB | AFB | |||
| 1pm-2pm | AFB | Linda | AFB | |||
| 2pm-3pm | Linda | Linda | AFB | |||
| 3pm-4pm | AFB | AFB | AFB | |||
| 4pm-5pm | Julian | Linda | AFB | AFB | ||
| 5pm-6pm | Julian | Linda | AFB | AFB | ||
| 6pm-7pm | Julian | Julian | Julian | Linda | AFB | |
| 7pm-8pm | Julian | Avery | ||||
| 8pm-9pm | Linda | Avery | ||||
| 9pm-10pm | Linda | |||||
4/6/2018: Vibration Isolation Project TA Schedule: The Brown Design Workshop will have a TA or faculty member present at the times indicated below.
| Sun Apr 8 | Mon Apr 9 | Tues Apr 10 | Wed Apr 11 | Thurs April 12 | |
| 9am-10am | XXXXXXXXXX | AFB | XXXXXX | AFB | XXXXXXXXXX |
| 10am-11am | XXXXXXXXXX | AFB | XXXXXX | AFB | XXXXXXXXXX |
| 11am-noon | Griffin | Yixiang/Linda | Yixiang/Linda | ||
| noon-1pm | Griffin | AFB | AFB | AFB | |
| 1pm-2pm | Rohan | JX | AFB | JX | AFB |
| 2pm-3pm | Rohan | JX | JX | AFB | |
| 3pm-4pm | Rohan | AFB | Michelle | AFB | AFB |
| 4pm-5pm | Paula | Michelle | Fernanda | AFB | AFB |
| 5pm-6pm | Paula | Michelle | Fernanda | AFB | AFB |
| 6pm-7pm | Paula | Noe | Fernanda | Odysseas | Rohan |
| 7pm-8pm | Linda | Max / Julian | Qi | Odysseas / Shagha | Linda |
| 8pm-9pm | Linda | Max / Julian | Qi | Odysseas / Shagha | Noe / Yixiang |
| 9pm-10pm | Linda / Julian | Max / Julian | Qi | Walker | Noe |
| 9pm-10pm | Julian | XXXXXXXXXXXXX | XXXXXXXXXXXXXXX | Shagha/ Walker | Yixiang |
3/26/2018: To be assigned to a project group for the vibration isolation project please fill out this form>>>
(Please fill out the form before 12:00 noon Thurs April 5. You will be notified of your team-mates by email by Fri April 6). If you find a team after filling out the form please email [email protected] and ask her to remove you from the database.)
3/14/2018: Grade distributions for the midterm (excluding grades from the make-up exam) are shown below. The average was 65%. The midterm is worth only 10% of the grade so it's not really meaningful to assign letter grades to scores, but if this were the final grade distribution the A/B cutoff would be somewhere around 80% and B/C might be somewhere around 60. The final grade averages are usually a lot higher than those on exams, however, because people do better on homeworks and projects than exams, so the cutoffs based on the final grade distribution (including everything) are usually closer to 90% for the A/B and 80% for B/C.
Overall people did a great job and there were a number of perfect scores. At the same time we can see that some very smart people we've been working with closely in office hrs had a really bad day. If you got a low score, don't worry too much - a 1.5 hr exam tests only a small number of concepts and doesnt give you much time to think, and so doesnt always give a very accurate measure of ability - that's why we only give the midterm a low weight when computing the final class grade. If you are doing well on homeworks and projects you can still get a good grade. We are sure you'll all do better on the final.
3/8/2018: Office Hours for the Predator-Prey Project are listed below
| Sat Mar 10 | Sun Mar 11 | Mon Mar 12 | Tue Mar 13 | Wed Mar 14 | Thu Mar 16 | |
| 10am-11am | Griffin | XXXXXXXXX | Class | Section | XXXXXXXXXX | |
| 11am-noon | Griffin | XXXXXXXXX | XXXXXXXX | Section | ||
| noon-1pm | Griffin | XXXXXXXXX | XXXXXXXXX | |||
| 1pm-2pm | Linda | XXXXXXXXX | Section | AFB | ||
| 2pm-3pm | Paula | Linda | Linda | AFB | AFB | |
| 3pm-4pm | Paula | Linda | AFB | AFB | AFB | |
| 4pm-5pm | Paula | Avery | AFB | Fernanda | AFB | AFB/Linda |
| 5pm-6pm | Michelle | Avery | Paula | Fernanda | AFB | AFB/Linda |
| 6pm-7pm | Michelle | Paula/Noe | Fernanda | Odysseas | XXXXXXXXXX | |
| 7pm-8pm | Michelle | Avery/Max | Qi/Julian | Odysseas/Shagha | XXXXXXXXXX | |
| 8pm-9pm | Michelle/Max | Qi/Julian | Odysseas/Shagha | XXXXXXXXXX | ||
| 9pm-10pm | Michelle/Max | Qi/Julian | Shagha/Walker | XXXXXXXXXXXXXXX | ||
| 10pm-11pm | XXXXXXXXXXXXX | XXXXXXXXXXXXX | Julian | Walker | XXXXXXXXXXXXXXX |
2/16/2018: Office Hours for the Mass Launcher Project are listed below
| Sun Feb 18 | Mon Feb 19 | Tue Feb 20 | Wed Feb 21 | Thu Feb 22 | |
| 10am-11am | XXXXXX | XXXXX | XXXXXXXXX | Section | XXXXXXXXXX |
| 11am-noon | XXXXXXXX | Griffin | XXXXXX | Section | XXXXXXXXX |
| noon-1pm | Avery | Griffin | XXXXXX | XXXXXXXXX | XXXXXXXX |
| 1pm-2pm | Rohan | Linda | Linda | Section | AFB |
| 2pm-3pm | Rohan | Linda | Linda | Avery | AFB |
| 3pm-4pm | Rohan | AFB | Linda | AFB | AFB |
| 4pm-5pm | Julian | AFB | Michelle/Fernanda | AFB | AFB/Avery |
| 5pm-6pm | Julian | Michelle/Fernanda | AFB/Michelle | AFB/Avery | |
| 6pm-7pm | Julian | Noe | Fernanda/Michelle | Odysseas/Michelle | Rohan/Griffin |
| 7pm-8pm | Paula | Max | Qi | Odysseas/Shagha | Walker/Griffin |
| 8pm-9pm | Paula | Max | Qi | Odysseas/Shagha | Noe/Yixiang |
| 9pm-10pm | Paula | Max | Qi | Yixiang/Shagha | Noe/Walker |
2/9/2018: To be assigned to a project group for the mass launcher project please fill out this form>>>
(Please fill out the form before 10pm Wed Feb 14. You will be notified of your team-mates by email by Fri Feb 16). If you find a team after filling out the form please email [email protected] and ask her to remove you from the database.)
1/26/2018: Additional weekend TA office hrs: Rohan Rastogi has kindly offered to hold extra office hours this week on Sunday Jan 28 from 1pm-3pm. This is an experiment - if people come we will offer weekend office hours regularly, but in the past they have not been attended. So if you'd like them, please come along!
1/26/2018: Office Hours have been scheduled as follows:
| Mon | Tu | Wed | Th | |
| 2pm-3pm | Section | XXXXXXXXXXXXXXXXXXX | Section | Prof Bower |
| 3pm-4pm | Prof Bower | XXXXXXXXXXXXXXXXXXX | Prof Bower | Prof Bower |
| 4pm-5pm | XXXXXXXXXXXXXXXXXXX | Yixiang Deng | Prof Bower | Prof Bower |
| 5pm-6pm | XXXXXXXXXXXXXXXXXXX | Yixiang Deng | Prof Bower | Prof Bower |
| 6pm-7pm | Noe Lum | Fernanda Lugo-Bolanos | Odysseas Skartsis | Walker Lee |
| 7pm-8pm | Max Lowndes | Qi Zhang | Odysseas Skartsis | Rohan Rastogi |
| XXXXXXXXXXXXXXX | XXXXXXXXXXXXXXXXXXX | Shagha Rezazadeh | ||
| 8pm-9pm | Max Lowndes | Qi Zhang | Odysseas Skartsis | Noe Lum |
| XXXXXXXXXXXXXXX | XXXXXXXXXX | Shagha Rezazadeh | Yixiang Deng | |
| 9pm-10pm | Max Lowndes | Qi Zhang | Fernanda Lugo-Bolanos | Noe Lum |
| XXXXXXXXXXXXX | XXXXXXXXXXXXXXX | Shagha Rezazadeh | Walker Lee |
1/20/2018: This is a quick note about arrangements for conferences and lectures next week. As you may know:
(1) The common lectures at 9am on Tuesdays and Thursdays cover the class material.
(2) The conference sections scheduled at 9, 10, 11, 1 and 2 on MWF are recitation sections. The monday section usually works through example problems, the Wed section discusses homework assignments. Sections generally don't meet Fridays, unless there is a design project presentation day. All the conferences will cover the same material. You can go to any section you like, and dont need to attend the same one each week - just use them in any way that helps you.
The conference sessions on Wed Jan 24, Mon Jan 29 and Wed Jan 31 will do worked examples to help you with our matlab tutorial and (on Wed Jan 31) answer questions about the first matlab homework. (due Feb 2). You might find it helpful to bring a laptop with matlab on it to these sections so you can follow along with the examples.
If you have a lot of matlab experience, (and maybe have already done the tutorial and homework) you can skip the first three matlab sections (although of course we will be sad not to see you!).
Lecture on Thursday will introduce the subject and organization of the class.
10/31/2017: Thank you for considering taking EN40 next semester - we hope we get a chance to work with you!