During senior year of college I was head of electrical engineering for the marine technology club and designed the control system for our ROV, Draugr. I ended up receiving credit for it as an independent study course and later wrote a paper which won a prize in the IEEE student paper contest.
The goal of the competition that year was to investigate a mockup shipwreck on the floor of a 17' pool.
The club partnered with the Society for Mechanical Engineers to build the frame on the mechanical engineering department's waterjet table provided they could have use of the ROV for their own manufacturing design competition. Buoyancy was provided by a large PVC tube at the top of the ROV which also served to strengthen the frame and keep the center of buoyancy high above the center of mass.
Under the deck was a metal plate with regularly spaced holes for mounting equipment and ballast trim weights.
Propulsion was provided by six bilge pump motors with attached propellers and shrouds. Instead of the previous year's incredibly massive metal drybox we decided to use an off the shelf plastic otterbox to house the electronics.
Holes were drilled into the side and the seacon waterproof electrical fittings from the previous year's ROV were installed. The overall footprint of the ROV fit within a rectangular box with rounded edges approximately the size of a all-in-one office printer which could easily be lifted by a single person leaning over the edge of a swimming pool, dock or boat.
The design of the electrical system diverged wildly from previous years. We opted for a two board design: one small carrier for a V DC-DC step-down converter and another large board holding the control system, power regulation, communications and motor drivers. The tether was a two cable system: one carried 48V power and the other was an extended length something like 50' USB cable. This allowed both control signals and video to be carried by the same cable.
In order to actually make the 50' run the USB cable required a mid-length repeater that was housed in-line within waterproof plastic potting we double potted it ourselves just to be sure. The whole super-long USB tether idea came about due to an image processing mission objective given by MATE as part of that year's challenge.Dragons in the bible
Traditionally most ROVs in our class used analog cameras connected to a monitor at the surface. We had to make panoramic images of objects on the pool's floor and waterproof webcams were far cheaper than building a control console with an analog image capture card in it.
At first we considered placing an embedded computer like a RasPi or beaglebone onboard the ROV and talking to it over ethernet but in the end we went with this USB-supertether concept for some reason that I can't really remember now. Anyway, the motherboard had a built-in USB hub more about that later that had an internal connection to an atmega microcontroller. The computer at the surface on the other end of the tether would see a USB-serial device and could command the motors to spin, sensors to take measurements, actuators to move, etc.What episode of full house does stephanie get her period
We weren't even limited to one webcam, in fact I went a bit overboard and attached two waterproof webcams about 2. This was pre-google cardboard so we couldn't just order one. VR undersea adventures! Unfortunately it was a gimmick and we didn't have time to make the camera mounts steady they were made of velcro for easy changes or the stereo goggles reliable enough to use off the test bench.
You can see the how ridiculously adorable the ROV looked with the dual mounted cameras though. The surface control console we ended up settling with was a laptop running an application one of our team members wrote that showed the webcam steam onscreen with the ability to save image snapshots.
It also took commands from an xbox controller and passed them on to the microcontroller to run the motors. It ended up being simple and intuitive enough that we allowed random people to use it in one of the school's fountains. In the end we didn't qualify for the national competition due to an electrical failure.
After several hours of successful testing at the regional MATE competition we attempted to preform our qualification trial. While transferring the ROV to the qualification pool we forgot the battery supply at our table. Instead of walking across the room to retrieve them another nearby team not naming any names offered us their batteries for the qualification test.
Long story short, we plugged them in and they killed the ROV. We were unable to restart it despite subsequent attempts using our own batteries. During post-mortem testing that evening at metrix we realized that our batteries had internal current limiters that would only allow them to provide a few amps max.Catatan Mahasiswa. Toggle navigation Menu. Saturday, February 09, Sekolah TK part 2. Sampe dimana ya crita gw yang kemarin ya?
Kalo lu semua lupa bisa baca lagi di Sekolah TK part 1. Saat di TK sebener'y gw punya banyak banget pengalaman yang pengen gw ceritain ke lu semua, namun apa daya umur yang semakin bertambah membuat ingatan gw semakin terbatas tentang masa TK gw. Tapi masih ada satu kenangan yang gw inget dan akan gw ceritain ke lu semua.
Hari itu gw masuk sekolah TK seperti biasa, dan seperti biasa pula gw selalu di anterin sama nyokap gw. Namun saat pulang sekolah yang biasa'y nyokap gw udah ada di depan gerbang bwat menanti kepulangan sang pangeran kecil'y, yaitu gw. Namun pada hari itu tidak ada tanda2 kedatangan nyokap gw, bahkan sendal jepit'y pun ga ada. Dan tanpa berpikir panjang gw memutuskan untuk pulang sendiri, karna gw berpendapat ga bakalan ada yang menghalangi jalan gw buat pulang ke rumah.
Langkah demi langkah gw lalui, nggak terasa gw telah melalui padang rumput yang gersang, melalui hutan amazon, dan melalui samudra pasifik, semua itu gw lalui tanpa ada masalah sedikit pun.Dj taj bbe challenge
Namun akhirnya gw mendapatkan hambatan yang cukup berarti, yaitu nyebrang jalan Read More. Subscribe to: Posts Atom. Selamat Datang.A holiday in St Petersburg may not be straightforward — did someone mention visas? Most visitors to St Petersburg will include a trip to the Hermitage Museum or Mariinsky Theatre, but the Russian city is full of less-celebrated gems. From contemporary art to jazz bars and an art hotel, we asked local writer Tim Stanley to recommend his top In St Petersburg, an underground arts movement is challenging the zeitgeist of greed, turning old buildings into creative utopias, finds Sean Michaels.
Been there readers recommend their favourite wintry places. St Petersburg: city of revolution turns itself around — again. Published: 29 Nov It is years since the Russian Revolution started in St Petersburg. Published: 20 Feb Searching for signs of the Soviets in St Petersburg.
Built from scratch by the tsars, imperial St Petersburg was at the epicentre of the Russian Revolution. Published: 22 Oct Top 10 Soviet-era experiences in St Petersburg.
St Petersburg holidays + City breaks
Published: 5 May Out on the tiles: a rooftop tour of St Petersburg. Driven by social media, a new type of almost legal high is on offer in St Petersburg. Published: 16 Aug St Petersburg's bar secrets: a city's icy reputation begins to thaw. Published: 5 Apr Top 10 city guides Top 10 hidden gems in St Petersburg. Published: 8 Nov Catatan Mahasiswa. Toggle navigation Menu. Long Distance Relationship ato orang2 lebih sering nyebut LDR, tolong dong kasih tau gw artinya apaan….
Kucing gw tau2an bahasa inggris. Udah gitu gw lebih ngerti bahasa kucing ketimbang bahasa inggris, ini gw yg bego apa kucing gw yg kebangetan gaul. Berhubung gw udah tau artinya dan berhubung gw udah janji sama temen mau nulis tentang LDR karna dia lagi LDRan, yaudah lah kali ini gw coba tepatin. Ada banyak pasangan diluar sana yg menjalani hubungan jarak jauh, kenapa?
Karena mereka ngga menjalin hubungan jarak dekat…. Misal gini, tadinya mereka ngga LDRan dan jadi LDRan karena salah satu dari mereka ditempatkan di daerah lain ato Negara lain untuk bekerja.
Itu salah satu contoh, sebenernya masih ada banyak contoh lain, kaya ada pasangan yg kuliah bareng di satu universitas yg sama di Jakarta, tapi perempuannya berasal dari Batam dan kemudian karna sesuatu hal yg tidak bisa dijelaskan, dia harus kembali ke Batam yg akhinya mengharuskan mereka untuk LDRan.
Bentar deh bentar…. Read More. Subscribe to: Posts Atom. Selamat Datang.What modern skills are critical to employee success, on and off the job? Perhaps networking, negotiation and personal financial management come to mind.Autohack apk
Helping employees manage the way work fits into their lives, day-to-day and at major life transitions, deliberately and with intention, is a modern skill set everyone needs, but few have.
Twenty years ago, clocks and walls used to tell us when work ended and the other parts of our life began.Fp blue vs 20g
As technology and globalization expanded, those boundaries disappeared, but the way we talk about, think about and decide where to put our time and energy remain stuck in Today, many employers offer more flexibility in how, when and where people can do their jobs. But with that increased work flexibility comes responsibility. Avoid the long train ride, get to the gym, and have dinner with your family.
Until now. You can catch an even more in-depth session at my pre-conference training at the San Francisco conference this fall. To learn more, go to our sitemy blog and our Tweak It Community.
You can also connect with me on Twitter and Facebook. Cali Williams Yost has been pioneering ways to manage work and life in the new economy for nearly two decades.
I came across an article earlier this week about the Five Myths of Stress. As someone with expertise in the stress domain, I typically enjoy reading articles that serve to bust myths for the general public. So, in the spirit of providing accurate information, I have decided to offer my rebuttal.
Um, well, what the author claims is a myth is actually percent accurate. Unfortunately, the article completely misses the boat when it comes to actually explaining the stress process. Stress is a complex interaction between our personal resources and environmental demands or stressors. Every contemporary, reputable, empirically-validated stress theory emphasizes this point, whether we are referring to the Job Demands-Resource Modelthe Demands-Control Modelthe Personal Resource Allocation Framework or other perspectives.
A search of scholarly articles in this domain will reveal a myriad of studies that show that internal e. Hence, a logical approach for all people is to focus on shoring up their own personal resources both internal and external and to focus on ways to minimize the impact of stressors in the environment.
For the example the author provides in her piece, a feasible way to go about mitigating the harmful effects of stress would be to 1 leverage any and all forms of social support available external resources ; 2 try to make intelligent decisions regarding sleep, exercise, and nutrition internal resources and 3 start looking for a new job, maybe one a little bit closer to home stressors.
This is where the author starts playing semantics with the issue of stress. And while the author tries to sweep that under the rug in a later part of her paragraph, that is what researchers, in general, study — chronic stress. Myth 3: Most people exposed to traumatic events develop post-traumatic stress disorder.
Hence, PSTD is a potential negative consequence that results from traumatic events that involve potential danger to oneself. Myth 4: Women and men respond to stress differently because of genetic and hormonal differences. I will grant the author one point here.
But the issue is not about stress causing conflict between work and non-work roles, the issue is about conflict between roles causing stress — and that is not a myth.Will this feature be available for use in Google Apps accounts, or only Gmail personal accounts? Good initiative. It would be nice to be able to customise the delay after which messages are automatically sent to the different persons. This is a beautiful thing. Damn it Google.Video Blog April 2013 Slow Sparring Part 2
I just can't quit you. I always thought about this And Google has the solution ready Love you all Keep coming such great tools. Nice thought I always wonder that what will happen when someone will check my profile or other data When I will b no more You had me at "digital afterlife". Thank you again for all you do.
I'm guessing the reason it's not available for Google Apps accounts is because in theory, those accounts are all owned by the company running it and the company would be responsible for users' data when they die.
But some of us use Google Apps just for personal use so we can get email on our own domains through Google. What about us?? I want to ask same as James Wright: Google Apps? In my case we some personal information in our accounts on a family-only domain. I really hope you guys consider Google Apps, please. Thanks google in today's age we live on forever with your amazing services. I have frequently thought about this as well. I don't want my private information falling into the wrong hands but because of my OCD, I don't really like the idea of it just sitting there, forever.
This is a very helpful feature. I appreciate your support. What's the max length of time you'll keep? Please say until the singularity! This is simply pathetic.Catatan Mahasiswa. Toggle navigation Menu.
Friday, July 05, 3 Kampret Dalam 1 Hari. Hari ini jumat, tanggal 7 Juni berjalan seperti hari2 biasanya gw kuliah. Ngga ada sedikit pun perasaan ataupun pikiran buruk yg terlintas di kepala gw. Gw bangun pagi dengan semangat buat kuliah karna hari jumat itu hari kesukaan gw di semester 6 ini, kenapa?Wife ke dhood dabane mein maja aaya video
Karena ada matakuliah bahasa jepang Udah beberapa semester ini gw lagi suka2nya sama jepang, ditambah lagi gw nonton dorama yg menurut gw bagus banngeeettt. Oh iya balik lagi ke cerita intinya, gw berangkat kuliah selalu jam setengah 8 pagi dan hampir selalu dateng pertama kalo matakuliah bahasa jepang.
Selain karna banyak cwe2 yg lalu lalang, dan wangi, disitu juga wifinya termasuk yang paling cepet kalo lagi cepet. Kita selalu ngerjain paper hari jumat karena dosen pembimbing kita cuma bisa bimbingan hari jumat doang, yang ngeselinnya hari jumat itu kita cuma ada 1 matakuliah itupun cuma 2 SKS selesai sekitar setengah 10 sedangkan kita bimbingan sekitar jam 2an, kebayang ngga tuh harus nunggu lama cuma buat bimbingan yang paling lama tuh cuma setengah jam.
Kita biasanya ngerjain paper sampe waktu sholat jumat tiba, trus kita sholat, abis sholat kita tidur2an dulu sampe tidur beneran. Pas bangun ya kita langsung aja pergi ke ruangan dosen pembimbing kita, dan setelah sampai di ruangan pembimbing kita, ternyata dosennya NGGA ADA!!
A visual look at 7 things that make us feel good about work
Soalnya dosen pembimbing gw botak, bahkan lu bisa ngaca kali di kepalanya saking licinnya. Kebayang ngga tuh, udah nunggu lama2 buat bimbingan taunya dia ngga ada Read More. Saturday, February 09, Sekolah TK part 2. Sampe dimana ya crita gw yang kemarin ya? Kalo lu semua lupa bisa baca lagi di Sekolah TK part 1.
Saat di TK sebener'y gw punya banyak banget pengalaman yang pengen gw ceritain ke lu semua, namun apa daya umur yang semakin bertambah membuat ingatan gw semakin terbatas tentang masa TK gw. Tapi masih ada satu kenangan yang gw inget dan akan gw ceritain ke lu semua. Hari itu gw masuk sekolah TK seperti biasa, dan seperti biasa pula gw selalu di anterin sama nyokap gw.
APA Center for Organizational Excellence: Good Company
Namun saat pulang sekolah yang biasa'y nyokap gw udah ada di depan gerbang bwat menanti kepulangan sang pangeran kecil'y, yaitu gw. Namun pada hari itu tidak ada tanda2 kedatangan nyokap gw, bahkan sendal jepit'y pun ga ada. Dan tanpa berpikir panjang gw memutuskan untuk pulang sendiri, karna gw berpendapat ga bakalan ada yang menghalangi jalan gw buat pulang ke rumah. Langkah demi langkah gw lalui, nggak terasa gw telah melalui padang rumput yang gersang, melalui hutan amazon, dan melalui samudra pasifik, semua itu gw lalui tanpa ada masalah sedikit pun.
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