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The radar tape recorder was designed to record radar pulses with a video bandwidth of 3.5 Mc; for the frequency modulation of these signals, a 4.5-Mc carrier was used to minimize the effect of "fold over" (side frequency terms) in the fm signal.
The primary problem of equalization is related to the need for compensating the amplitude-versus-frequency response of the magnetic playback process. The flat amplitude and linear phase responses required to meet the performance specifications for the radar tape recorder were achieved. The following equation, however, shows that the amplitude response of the playback process is not flat and further that the phase response is linear. Therefore, the equalization must compensate for the amplitude response of the playback process without introducing a nonlinear phase characteristic.
Analysis of the magnetics problem results in the following equation for the output voltage from a playback head, assuming a sinusoidal recorded flux on the tape.
Two tape recorders have been in continuous operation on the pacific missile range for almost a year and have recorded and preserved much valuable data for further analysis and evaluation. The advanced techniques employed have proven invaluable in the study of missile re-entry.
Credit for work on the original Tradex tape recording system, which was a forerunner of the high-speed precision tape system described in this paper, is due to H. R. Warren and his associates in the DEP Communications Systems Division.
Also, credit for magnetic head design is extended to the Magnetic Head Development and Design Group of the Broadcast and Communications Products Division, under the direction of B. F. Melchionni. This project was completed successfully because of the tireless efforts of many people with varied skills. It would be unjust not to mention two of the technical giants, Thomas Bolger and Jackson, who did so much to bring this project to fruition.
Tape speed, 1,180 ips, max.
Gap scatter, 40 u inch max.
Mounting: precision magnetic record-playback heads on precision machined rocker arms which are completely replaceable with only one adjustment, head pressure (by two self-locking coarse and fine adjust screws).
signal Crosstalk, 50 db max.
Signal to noise, 30 db min.
All distortion, - 30 db min.
Crosstalk, - 50 db max.
duty cycle Rise time: 0.1 usee. max.
Fig. 1 - The high-precision instrumentation tape recorder.
Fig. 2 - Acquisition of data by tracking radar plus recording and storage of such data by precision tape recorder.
Fig. 3 - Tape transport. Fig. 4a - Capstan-head subassembly.
Fig. 4b - Detail of capstan and heads.
Fig. 5 - Reel servo system.
wo sind 5 und 6 ???
Fig. 9 - Typical pen recording of intertrack phase jitter (shown are tracks 4 and 10).
Fig. 10 - Elements of a typical FM channel.
Fig. 12 - Aperture correction circuit and phase-gain curves obtained.
Beginning Python: From Novice to Professional is the most comprehensive book on the Python ever written. Based on Practical Python, this newly-revised book is both an introduction and practical reference for a swath of Python-related programming topics, including addressing language internals, database integration, network programming, and web services. Advanced topics, such as extending Python and packaging/distributing Python applications, are also covered.
Ten different projects illustrate the concepts introduced in the book. You will learn how to create a P2P file-sharing application and a web-based bulletin board, and how to remotely edit web-based documents and create games. Author Magnus Lie Hetland is an authority on Python and previously authored Practical Python. He also authored the popular online guide, Instant Python Hacking, on which both books are based.
U.S. Pharmacist is a monthly journal dedicated to providing the nation's pharmacists with up-to-date, authoritative, peer-reviewed clinical articles relevant to contemporary pharmacy practice in a variety of settings, including community pharmacy, hospitals, managed care systems, ambulatory care clinics, home care organizations, long-term care facilities, industry and academia. The publication is also useful to pharmacy technicians, students, other health professionals and individuals interested in health management. Pharmacists licensed in the U.S. can earn Continuing Education credits through Postgraduate Healthcare Education, LLC, accredited by the Accreditation Council for Pharmacy Education (ACPE) as a provider of continuing pharmacy education.
Copyright © 2000 - 2016 Jobson Medical Information LLC unless otherwise noted.
Cornerstone Kansas City’s Director of Client Services, Lisa Bruemmer writes about the critical importance of in-person meetings during the Executive Search recruiting and hiring process.
Does it make a sound? I guess that depends on if anyone is listening.
I recently read an article on Thrive Global, If You Do This, You Will Have Better Relationships, by Mareo McCracken and it got me thinking. Does the continual striving to be heard make sense if nobody is listening?
Listening is a skill. An art. It requires practice and focus to do it well. The payoff for honing our listening skills is huge both personally and professionally so why aren’t we better at it? I think the answer is simple but difficult to overcome. Most of us are much more concerned about being heard. Our communication has become automated and one-sided as we become reliant on our cell phones, text, email, twitter, Instagram, facebook, etc. to tell, sell, inform and connect. Everyone is talking which begs the question, who is listening?
Professional and personal relationships require good listening. A resume doesn’t tell you who a candidate is only what they’ve done and an email can’t convey what the hiring manager is like to work with or the culture of a business. So, I recommend you take that old school, face-to-face meeting whenever you can. Cornerstone Kansas City is listening.
Following a multi-million pound revamp, Hastings Library re-opened on 2 March 2018 and unveiled a striking new artwork by Sir Quentin Blake. His work adorns the Children’s Library, which relocated to the Brassey Institute from its former home in Robertson Passage, as part of the major project.
Hastings Library reopened following the project which has seen the historic building at the heart of the town protected and enhanced. A new roof and lift were installed, the building was rewired and all lighting was replaced before the addition of new furniture, more computers and improved toilet facilities and the introduction of free WiFi. The library will host a range of children’s activities including Code Clubs, Rhyme time and Storytime, while adults can join IT For You to develop computer skills or ask for help in a Computer Buddy session. In addition to offering a range of books to borrow, the library will hold a range of reference information for study of the local area, as well as DVDs and health and wellbeing resources. The public computers provide free access to the internet, training courses, online reference materials, research programs for family history. Learning services will now operate from their own dedicated computer suite on the second floor, providing opportunities to improve literacy, numeracy and computer skills.
Visit East Sussex County Council's website for further details about Hastings Library opening times and facilities.
Have a look at this Small Part Shelving System that we supplied and installed for an Electrical Wholesale company this week.
This Used Small Part Shelving was the perfect solution for this company who needed to re-organise their space and establish a new stock management system for their warehouse.
Given the size and nature of their products, the customer installed dividers which increased their shelving sections and helped get the most out of their space.
Does this look like a storage system that could help your business?
Book a Free Site Visit today and have one of our team visit your property to assess your space and find the ideal storage solution for you business.
HIS - Home Inspections Services assembled these useful links as a resource for you.
Learn more about ASHI and what it means to be a certified member.
Learn more about home inspections by taking the ASHI virtual tour. Provided by the American Society of Home Inspectors.
List of Licensed Structural Pest Inspectors for Washington State. Is your Washington State inspector licensed?
The PRO-LAB® Professional PARTNERS Program is your solution for locating the most qualified and professional environmental home inspectors, industrial hygienists, air duct cleaners and remediation services in the country.
I have posted a letter of intent similar to this in the past... doing so in this various places for years, but wanted to renew the sentiments for the coming season.
I write today you to tell you of my RENEWED intentions for this year so as to spare you any confusion or frustration when next you encounter me. It is my intention to remain 'in character' as much as possible during my travels for this present year.
"Our organization will educate via a series of first person activities designed to demonstrate the real lives of sailors as they go about their business and live their lives."
There is no doubt in my mind that this could be difficult for me, but also for those around me; and I do not wish to alienate any of my friends or compatriots. Things will not be much different, I imagine, than they have been in the past... you've all met the Doctor during YOUR travels, and know the agreeable sort of fellow he can be.
I am generally already 'in character' for all the visitors and guests I work with at various events, if done correctly, I believe it can be a powerful learning tool for the public.
In addition, I'd like to request that you all help me to do this by not trying to 'snap me out of it' by mentioning a bunch of modern stuff to me whilst at an event. I believe that enough of you have my email address and are friends with me on various forums, message boards and social networking sites... that any out of character conversation can safely take place there at any time.
I tell you now that if you attempt to talk to the Doctor about movies, internet, cellphones and the like, he will be terribly confused. There is a time and a place for talk of that sort, and for me, it's NOT while I'm dressed out at an event.
I daresay I will go one step further and challenge YOU once again to give your interpretation and character some thought. It's no fun if I don't have a few of you to play along!
Special thanks to everyone that has encouraged me (verbally & otherwise) to do this in the past, I look forward to the additional research that I need to do over the fall and winter to get me where I need to be... and the Doctor looks forward to meeting you in the year to come. This has the potential to be a really fantastic learning experience!
Former president Mahinda Rajapaksa should be brought to book as he is the prime suspect in all cases of large scale corruption, said Power and Energy Minister Patali Champika Ranawaka this evening.
Speaking at a seminar organised by the Anti-Corruption Front at the Sri Lanka Foundation Institute, Mr. Ranawaka said the present regime should be firm in dealing with those who face corruption charges and penalise everyone who had been involved in fraud and corruption in the recent past — right from the top to the bottom.
“We cannot afford to be lethargic about overcoming corruption,” he said; stressing that the racketeers who were involved in large scale corruption and fraud were trying to find a way out.
He said some of them may try to bribe prominent members of the present regime in order to escape.
Referring to the arrest of former UNP general secretary Tissa Attanayake, he said others involved in the campaign accusing Maithripala Sirisena and Ranil Wickremesinghe of having a secret pact should also be arrested.
Know Crossland HS Class of 2006 graduates that are NOT on this List? Help us Update the 2006 Class List by adding missing names.
More 2006 alumni from Crossland HS have posted profiles on Classmates.com®. Click here to register for free at Classmates.com® and view other 2006 alumni.
If you are trying to find people that graduated in '06 at Crossland High in Temple Hills, MD, check the alumni list below that shows the class of 2006.
This breaks compilation on anything but Linux, BSD/FreeBSD, Mac OSX, Sun, SysV R4. I deleted it to build for Windows.
Did you mean to put this below all other OS definitions, and using a condition that excludes every OS that has its own definition and implementation?
Our local Albertson’s, in Oregon, removed self service checkouts during the summer. Self service checkouts have been seen as a semi-automated way of reducing labor costs, and for some customers, a faster checkout experience. However, Albertson’s grocery is now removing self service checkouts from additional (but not all) stores in Southern California.
Previous story Will automation lead to better jobs, rather than fewer? Some say yes.
On the 12th Day of Christmas my true love gave to me, twelve Drummers Drumming.
I just want you to think about it for a minute people. In the name of interesting gift giving, this poor lady now has girls milking cows, others dancing around her courtyard. She has a small band of pipers and drummers. Oh, and let's not forget the band of leaping lords. She is overrun by all kinds of fowl including geese, partridges, turtle doves, swans and hens. But its not all bad. She has managed to get a bit of jewelry out of the whole thing. I guess she could have done worse. She could have gotten a box of chocolates and the dude could have called it quits. He certainly gets an A for creativity if nothing else.
Over here in our little Fig Tree neck of the woods, we are a bit tired and certainly dazed by all of your shopping prowess. You guyss are quite a dedicated bunch and we really appreciate you!
For this last day we have a grab bag of little goodies. All those little items that we didn't manage to share on any other day. We have: LITTLE BAG O' PEARL BUTTONS, TWINE, CHARMS, POT HOLDERS & a few new BUNDLES.
And the LAST free goodie for our 12 Days is our CHRISTMAS ROSE STOCKING pattern. A perfect little addition to this time of year!
For ordering info on the goodies above, CLICK HERE.
Can't believe that the 12 DAYS OF CHRISTMAS SALE is done! It has been so much fun to do this with you and such a fun Christmas tradition to do for the second year.
Tune in tomorrow for a special follow up post!
I know that we just barely made it without having to call it CHRISTMAS IN AUGUST... which just doesn't quite have the same ring to it, don't you think?
But it's still July, so maybe you could just go with it with me?
For those of you who received our newsletter, this is old hat... but we are having a quick little sale on all of our Christmas related patterns... 15% off.
Go to our SHOP, to search for the patterns above you might like.
And the icing on the cake, or the star on top of the Christmas tree, is that every CHRISTMAS IN JULY order will receive a FREE RED, GREEN OR CREAM FAT QUARTER!!
Click HERE for more info on those.
Hope your summer is turning out to be full of wonder!
We thought we would have some fun today and send you some strawberry love. Given our apparent love of all things strawberry around here, we are putting anything strawberry related on sale 20% this weekend.
This includes any pattern that has the word strawberry in it or is made out of our STRAWBERRY FIELDS fabric collection.
Now you have to go to the website and search for the patterns to see what they are. Some are quilts, some are accessory goodies, some are purses... there is even a box cushion in there. Have fun searching!
In addition, we thought we would tie up some strawberry themed bundles for you for the occasion. These are not on sale, but are added into the festivities just for the fun of it. Not a lot of them here so get 'em while you can!
Click here for more info on the Strawberry Bundles.
With ANY STRAWBERRY SALE PURCHASE [that would include the bundle or any of the above mentioned patterns], we will include a STRAWBERRY CAFE pattern in your order free!
Strawberry Cafe has a pattern in it for some fun summer curtains and a matching table topper. How could you possibly resist?
Stefi has degrees in medical history (UC Berkeley) and international public health (UCLA). In 2010 she co-founded the Sustainable Healthcare Education network to integrate sustainability and health into medical and nursing education. She led public health teaching at Norwich Medical School, global public health at Azim Premji University in Bangalore, and violence prevention for the Medical Peace Work Partnership at the University of Bergen, Norway.
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For many manufacturers, compressed air is often extremely expensive.
On average, compressed air costs can consist of up to 50% of the total electric expenditure of a large manufacturing plant – adding up to millions of dollars per year.

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