A Brief History of Early Navigation
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A Personal Dead Reckoning Module Dr
A Personal Dead Reckoning Module Dr. C. Tom Judd, Point Research Corporation BIOGRAPHY what has been done in vehicular and aircraft applications where inertial navigators are used to bridge the dead Dr. Tom Judd is Chief Scientist at Point Research spots. Corporation. For the past four years he has been responsible for developing and implementing algorithms Dead reckoning has been used for ages to obtain a for dead reckoning. Dr. Judd received his Bachelor of position estimate based on velocity, time, and direction Science degree in Physics from St. Mary’s College of from a starting point. For a person on foot, measuring California, and his Ph.D. in Biophysics from the distance directly using a pedometer is a practical means University of California, Davis. for measuring distance traveled. Take the pace count and multiply by the distance for each pace, and you get the ABSTRACT total distance traveled. Pace count has in the past been a an important measure of distance over land. The word Point Research Corporation of Santa Ana, CA has mile originates from the Latin word for one thousand, developed a new lightweight miniature Dead Reckoning milie, the number of paces in a mile. Module (DRM) for drift-free navigation by personnel on foot. The traditional compass and pace-count dead There are several advantages in weight, size, power reckoning navigation has been replaced by a continuous consumption, and accuracy to using electronic dead hands-free module. An internal solid-state 3 dimensional reckoning over a conventional inertial navigator. Inertial compass provides a robust tilt-corrected heading. -
Rotational Motion (The Dynamics of a Rigid Body)
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Robert Katz Publications Research Papers in Physics and Astronomy 1-1958 Physics, Chapter 11: Rotational Motion (The Dynamics of a Rigid Body) Henry Semat City College of New York Robert Katz University of Nebraska-Lincoln, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/physicskatz Part of the Physics Commons Semat, Henry and Katz, Robert, "Physics, Chapter 11: Rotational Motion (The Dynamics of a Rigid Body)" (1958). Robert Katz Publications. 141. https://digitalcommons.unl.edu/physicskatz/141 This Article is brought to you for free and open access by the Research Papers in Physics and Astronomy at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Robert Katz Publications by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. 11 Rotational Motion (The Dynamics of a Rigid Body) 11-1 Motion about a Fixed Axis The motion of the flywheel of an engine and of a pulley on its axle are examples of an important type of motion of a rigid body, that of the motion of rotation about a fixed axis. Consider the motion of a uniform disk rotat ing about a fixed axis passing through its center of gravity C perpendicular to the face of the disk, as shown in Figure 11-1. The motion of this disk may be de scribed in terms of the motions of each of its individual particles, but a better way to describe the motion is in terms of the angle through which the disk rotates. -
NOTE: to Set Any Watch Function, the Digit(S) MUST Be Flashing
CONGRATULATIONS! You have selected a quality timepiece that will assist you in remembering tasks, managing your time and keeping focused. Perfect for reminders for medication and medical conditions, timing presentations or procedures, for cooking, parking meters and for keeping on schedule. The uses are endless. Set the “vibration” feature for alarm settings and countdown timer when you do not want to alert or disturb others or when you cannot hear an audible alarm. This unique watch has been carefully designed to give user satisfaction and to be user friendly. The large display is easy to read. Prompts are displayed to assist in easy setting. User options are easily set. Enjoy the many benefits of this wonderful watch. OPERATING MODES: CALENDAR ALARM CHRONO TIMER OPTION CLOCK (STOPWATCH) Vibra LITE 8 is a trademark of GLOBAL ASSISTIVE DEVICES, INC. Page 1 NOTE: To set any watch functions, the digit(s) that you want to set MUST BE FLASHING. When setting Calendar/Clocks, Alarms or Timer: if a delay of approx. 3 minutes occurs without buttons being pushed, digits will stop flashing and watch will return to Calendar/Clock Mode. Watch display will automatically return to Calendar/Clock Mode from Option Mode when no buttons are pushed in approx. 3 minutes. SETTING TIME OF DAY AND CALENDAR NOTE: THIS IS TIME ZONE 1 & MUST BE SET CORRECTLY FOR THE TIME OF DAY AS THE ALARMS WILL WORK BASED ON THIS TIME. Three Time Zones are available. Set Time Zone 1 for the time of day of your home location. This is the default Time and will show on the watch at all times when it is in the Calendar/Clock mode. -
Grandfathers' Clocks: Their Making and Their Makers in Lancaster County
GRANDFATHERS' CLOCKS: THEIR MAKING AND THEIR MAKERS IN LANCASTER COUNTY, Whilst Lancaster county is not the first or only home of the so-called "Grandfathers' Clock," yet the extent and the excellence of the clock industry in this type of clocks entitle our county to claim special distinction as one of the most noted centres of its production. I, therefore, feel the story of it specially worthy of an enduring place in our annals, and it is with pleasure •and patriotic enthusiasm that I devote the time and research necessary to do justice to the subject that so closely touches the dearest traditions of our old county's social life and surroundings. These old clocks, first bought and used by the forefathers of many of us, have stood for a century or more in hundreds of our homes, faithfully and tirelessly marking the flight of time, in annual succession, for four genera- tions of our sires from the cradle to the grave. Well do they recall to memory and imagination the joys and sorrows, the hopes and disappointments, the successes and failures, the ioves and the hates, hours of anguish, thrills of happiness and pleasure, that have gone into and went to make up the lives of the lines of humanity that have scanned their faces to know and note the minutes and the hours that have made the years of each succeeding life. There is a strong human element in the existence of all such clocks, and that human appeal to our thoughts and memories is doubly intensified when we know that we are looking upon a clock that has thus spanned the lives of our very own flesh and blood from the beginning. -
Possible Accurate Time/Frequency Sources for Maserless VLBI? Seticon04
Possible accurate time/frequency sources for maserless VLBI? SETICon04 Marko Cebokli S57UUU ABSTRACT - The SETI League's project ARGUS currently works as a set of independent antennas/receivers, distributed in direction to maximize solid angle coverage. In some cases like wanting to do a follow-up observation with increased sensitivity, it would be desirable to coherently combine signals from several antennas. Since project ARGUS antennas are geographically dispersed, VLBI techniques will have to be used. This paper gives a quick overview of possible synchronization sources available to stations lacking atomic standards or masers. 1. REQUIREMENTS When combining two coherent signals of equal amplitude, to keep combining losses below 1dB, the phase error must be less than 54 degrees. This is similar to the common optical criterion of 1/8 wavelength or 45 degrees wavefront error. In terms of delay, for example on 1.4GHz, that is cca 100ps or 3cm of path length difference. For a 100 sec integration time, for example, the required accuracy is therefore 1E- 12. On lower frequencies, the requirement gets relaxed proportionally to wavelength, but VLBI gets difficult because of the random delays in the ionosphere, which quickly increase below a few hundred Mhz. Maybe some equivalent of adaptive optics as used by optical astronomers to mitigate atmospheric turbulence ('seeing') could be used here to take the twinkle out of the ionosphere on the lower bands? Apart from the RF frequency/phase synchronization, there is also the need to synchronize the recording start time, to reduce the amount of searching needed at the central correlating station. -
Create an Absence/OT Request (Timekeeper)
Create an Absence/OT Request (Timekeeper) 1. From the Employee Self Service home page, select the drop-down at the top of the screen, and choose Time Administration. a. Follow these instructions to add the Time Administration page/tile to your homepage. 2. Select the Time Administration tile. a. It might take a moment for the Time Administration page to load. Create Absence/OT Request (Timekeeper) | 1 3. Select the Report Employee Time tab. 4. Click on the Employee Selection arrow to make the Employee Selection Criteria section appear. Enter full or partial search items to refine the list of employees, and select the Get Employees button. a. If you do not enter search criteria and simply click Get Employees, all employees will appear in the Search Results section. Create Absence/OT Request (Timekeeper) | 2 5. A list of employees will appear. Select the employee for whom you would like to create an absence or overtime request. 6. The employee’s timesheet will appear. Navigate to the date of the leave request using the Date field or Previous Period/Next Period hyperlinks, and select the refresh [ ] icon. Create Absence/OT Request (Timekeeper) | 3 7. Select the Absence/OT tab on the timesheet. 8. Select the Add Absence Event button. Create Absence/OT Request (Timekeeper) | 4 9. Enter the Start and End Dates for the absence/overtime event. 10. Select the Absence Name drop-down to choose the appropriate option. Create Absence/OT Request (Timekeeper) | 5 11. Select the Details hyperlink. 12. The Absence Event Details screen will pop up. Create Absence/OT Request (Timekeeper) | 6 13. -
Special Chronograph Instructions & Warranty
IMPORTANT! Register for your warranty Special Chronograph online at www.reactorwatch.com Instructions & Warranty Welcome IMPORTANT! REACTOR watches were conceived, Every analog REACTOR watch is fitted designed and built to withstand the real with a screw-down crown to ensure world of sport enthusiasts. We are very maximum water resistance. However, proud of what we have accomplished using your watch in water with the crown and we are excited to welcome you to unscrewed or only partially screwed our ever-growing family. down may result in leakage. While your REACTOR watch is built for ALWAYS CHECK THAT THE CROWN IS maximum durability, it should ALWAYS be COMPLETELY SCREWED DOWN BEFORE rinsed thoroughly after use in salt water. SUBMERGING YOUR WATCH! www.reactorwatch.com www.reactorwatch.com Warranty Service Our warranty is simple and straight If your watch needs service, return it to: forward: if anything goes wrong with Reactor Service your REACTOR watch in the first two 5312 Derry Ave., Suite B years of ownership, we will either repair Agoura Hills, CA 91301 or replace it at our expense. Please download the Repair Form from Here’s the “not so small print”: the Service section of our website, Normal wear and tear and abuse are not complete it, and include it with your considered manufacturing defects and watch. Our service center is committed are not covered by our warranty. to having your watch back to you in no more than 10 working days. www.reactorwatch.com www.reactorwatch.com Setting the Watch 1. Unscrew crown and pull to pos. 2. -
Pacific Parables Final
Pacific Parables Raqs Media Collective [Address to the Pacific Rim New Media Summit, ISEA2006 and Zero One Festival, San Jose, August 2006. Published in in PLACE: Local Knowledge and New Media Practice, Edited by Danny Butt, Jon Bywater & Nova Paul. Cambridge Scholars Press, Newcastle, 2008] The Pacific Rim as a Fiction of Place The Pacific Rim is a fiction about place, a filter through which you can look at the world if you choose to and confer more or less arbitrary meanings on to a set of latitudes and longitudes. There have been previous fictions about place straddling this water, one was called the Greater East Asia Co-Prosperity Sphere, and unleashed havoc in the name of the solidarity of oppressed peoples of Asia, another thought of the Pacific as a Californian frontier, a kind of Wild Blue West. A third spoke French, and drew naked women in Tahiti, and dropped hydrogen bombs in the water. A fourth, the South Pacific Bubble, was one of the first episodes of global financial speculation that shaped the turbulence of the economy of our modern era. Meanwhile, Sikh peasants from the Punjab, Chinese railroad workers from Canton, Agricultural workers and sugarcane cultivators from the hinterland of North India traversed the ocean, Mexicans swam, or walked along the coastline, Australian sailors, New Zealanders on whaling ships, Japanese factory workers, Filipina nurses and itinerant Pacific Islander communities traversed the Pacific, and the wider world, buffeted by the rough winds of recent history. They grew fruit trees in Napa valley, felled timber in British Columbia, mined tin in Peru, pressed grapes in Chile and made what some of choose to call the Pacific Rim what it is today. -
FROM LONGITUDE to ALTITUDE: INDUCEMENT PRIZE CONTESTS AS INSTRUMENTS of PUBLIC POLICY in SCIENCE and TECHNOLOGY Clayton Stallbau
FROM LONGITUDE TO ALTITUDE: INDUCEMENT PRIZE CONTESTS AS INSTRUMENTS OF PUBLIC POLICY IN SCIENCE AND TECHNOLOGY Clayton Stallbaumer* I. INTRODUCTION On a foggy October night in 1707, a fleet of Royal Navy warships ran aground on the Isles of Scilly, some twenty miles southwest of England.1 Believing themselves to be safely west of any navigational hazards, two thousand sailors discovered too late that they had fatally misjudged their position.2 Although the search for an accurate method to determine longitude had bedeviled Europe for several centuries, the “sudden loss of so many lives, so many ships, and so much honor all at once” elevated the discovery of a solution to a top national priority in England.3 In 1714, Parliament issued the Longitude Act,4 promising as much as £20,0005 for a “Practicable and Useful” method of determining longitude at sea; fifty-nine years later, clockmaker John Harrison claimed the prize.6 Nearly three centuries after the fleet’s tragic demise, another accident, also fatal but far removed from longitude’s terrestrial reach, struck a nation deeply. Just four days after its crew observed a moment’s silence in memory of the Challenger astronauts, the space shuttle Columbia disintegrated upon reentry, killing all on board.7 Although * J.D., University of Illinois College of Law, 2006; M.B.A., University of Illinois College of Business, 2006; B.A., Economics, B.A., History, Lake Forest College, 2001. 1. DAVA SOBEL, LONGITUDE: THE TRUE STORY OF A LONE GENIUS WHO SOLVED THE GREATEST SCIENTIFIC PROBLEM OF HIS TIME 12 (1995). -
QUICK REFERENCE GUIDE Latitude, Longitude and Associated Metadata
QUICK REFERENCE GUIDE Latitude, Longitude and Associated Metadata The Property Profile Form (PPF) requests the property name, address, city, state and zip. From these address fields, ACRES interfaces with Google Maps and extracts the latitude and longitude (lat/long) for the property location. ACRES sets the remaining property geographic information to default values. The data (known collectively as “metadata”) are required by EPA Data Standards. Should an ACRES user need to be update the metadata, the Edit Fields link on the PPF provides the ability to change the information. Before the metadata were populated by ACRES, the data were entered manually. There may still be the need to do so, for example some properties do not have a specific street address (e.g. a rural property located on a state highway) or an ACRES user may have an exact lat/long that is to be used. This Quick Reference Guide covers how to find latitude and longitude, define the metadata, fill out the associated fields in a Property Work Package, and convert latitude and longitude to decimal degree format. This explains how the metadata were determined prior to September 2011 (when the Google Maps interface was added to ACRES). Definitions Below are definitions of the six data elements for latitude and longitude data that are collected in a Property Work Package. The definitions below are based on text from the EPA Data Standard. Latitude: Is the measure of the angular distance on a meridian north or south of the equator. Latitudinal lines run horizontal around the earth in parallel concentric lines from the equator to each of the poles. -
Th B T the Brocots
The BtBrocots A Dyyynasty of Horologers Presented by John G. Kirk 1 Outline • Introduction • Background: Paris Clocks • Brocot GlGenealogy • The Men and Their Works • Gallery 2 Outline • Introduction • Background: Paris Clocks • Brocot GlGenealogy • The Men and Their Works • Gallery 3 Introduction • This is a review of “Les Brocot, une dynastie d’ horlogers” by Richard Chavigny • Dean Armentrout asked me to discover the following: – How many/who are the Brocots who contributed to horology (see below…) – The years the famous innovations were made (and by whom) (see below…) – How the Brocot dynasty interacted with other clockmakers, for example the house of Le Roy (i(curious ly, such iitnterac tions, if any, aren’t mentioned in the book) 4 Outline • Introduction • Background: Paris Clocks • Brocot GlGenealogy • The Men and Their Works • Gallery 5 The Paris Clock (1 of 5) • The term, la Pendule de Paris, applies to table/mantel clocks developed by Parisian clockmakers • Beginning around 1810 and continuing well into the 20th century production of these clocks evolved into a highly industrialized process 6 The Paris Clock (2 of 7) • Around 1810, Paris clocks were no longer fabricated from scratch in Paris except by the grand houses, such as Breguet, Le Paute, etc. • A “mass” market for high quality, competitively‐priced “Clocks of Commerce” developed based on ébauches completed and finished in Paris 7 The Paris Clock (3 of 7) • The ébauches comprised – The two plates – The barrel (without spring) – The stiktrike titrain compltlete with dtdeten -
Latitude/Longitude Data Standard
LATITUDE/LONGITUDE DATA STANDARD Standard No.: EX000017.2 January 6, 2006 Approved on January 6, 2006 by the Exchange Network Leadership Council for use on the Environmental Information Exchange Network Approved on January 6, 2006 by the Chief Information Officer of the U. S. Environmental Protection Agency for use within U.S. EPA This consensus standard was developed in collaboration by State, Tribal, and U. S. EPA representatives under the guidance of the Exchange Network Leadership Council and its predecessor organization, the Environmental Data Standards Council. Latitude/Longitude Data Standard Std No.:EX000017.2 Foreword The Environmental Data Standards Council (EDSC) identifies, prioritizes, and pursues the creation of data standards for those areas where information exchange standards will provide the most value in achieving environmental results. The Council involves Tribes and Tribal Nations, state and federal agencies in the development of the standards and then provides the draft materials for general review. Business groups, non- governmental organizations, and other interested parties may then provide input and comment for Council consideration and standard finalization. Standards are available at http://www.epa.gov/datastandards. 1.0 INTRODUCTION The Latitude/Longitude Data Standard is a set of data elements that can be used for recording horizontal and vertical coordinates and associated metadata that define a point on the earth. The latitude/longitude data standard establishes the requirements for documenting latitude and longitude coordinates and related method, accuracy, and description data for all places used in data exchange transaction. Places include facilities, sites, monitoring stations, observation points, and other regulated or tracked features. 1.1 Scope The purpose of the standard is to provide a common set of data elements to specify a point by latitude/longitude.