Aboriginal Fire-Making Author(S): Walter Hough Reviewed Work(S): Source: American Anthropologist, Vol
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Practical Implementation of the Stream Function Method for Design of Arbitrary-Geometry Gradient Coils
Practical Implementation of the Stream Function Method for Design of Arbitrary-Geometry Gradient Coils R. A. Lemdiasov1, R. Ludwig2 1Insight Neuroimaging Systems, Worcester, MA, United States, 2ECE Department, Worcester Polytechnic Institute, Worcester, MA, United States Introduction Over the past several years a variety of theoretical design methods for the construction of gradient coils have been developed. For instance, in [1] D. Green et al. minimize a weighted combination of power, inductance, and the square difference between actual and desired field. Representing the current as a Fourier series they find optimal coefficients that minimize the cost function. Our work is a continuation of last year’s research reported in [2]. In this paper we describe an alternative implementation of a stream function method to design gradient coils. Using this method we are able to determine the current distribution to achieve a prescribed magnetic field distribution in the Region of Interest (ROI) that is largely independent of the shape of the current-carrying surface. We will demonstrate the successful implementation of our approach as well as experimental results. Theory As mentioned above, a cost function Φ can be introduced in the form K Φ = 1 ()() ()− ()+ 2 +α ∑W rk Bz rk Bdes,z rk Boff ,z Wmagn (1) 2 k =1 () () where W r is a weight function, BZ is the z-component of the total field, Bdes,z r as well as Boff,z are the z-components of the desired and offset magnetic field, and α Wmagn is magnetic energy with being a weight coefficient. In (1), the first term denotes the square deviation of the magnetic field from the prescribed field, and the second term is the magnetic energy of the coil. -
Fire Bow Drill
Making Fire With The Bow Drill When you are first learning bow-drill fire-making, you must make conditions and your bow drill set such that the chance of getting a coal is the greatest. If you do not know the feeling of a coal beginning to be born then you will never be able to master the more difficult scenarios. For this it is best to choose the “easiest woods” and practice using the set in a sheltered location such as a garage or basement, etc. Even if you have never gotten a coal before, it is best to get the wood from the forest yourself. Getting it from a lumber yard is easy but you learn very little. Also, getting wood from natural sources ensures you do not accidentally get pressure-treated wood which, when caused to smoulder, is highly toxic. Here are some good woods for learning with (and good for actual survival use too): ► Eastern White Cedar ► Staghorn Sumac ► Most Willows ► Balsam Fir ► Aspens and Poplars ► Basswood ► Spruces There are many more. These are centered more on the northeastern forest communities of North America. A good tree identification book will help you determine potential fire-making woods. Also, make it a common practice to feel and carve different woods when you are in the bush. A good way to get good wood for learning on is to find a recently fallen branch or trunk that is relatively straight and of about wrist thickness or bigger. Cut it with a saw. It is best if the wood has recently fallen off the tree. -
Notice of a Collection 01 Perforated Stone Objects, from the Garioch, Aberdeenshire
6 16 PROCEEDING SOCIETYE TH F O S , FEBRUARY 9, 1903. III. NOTICE OF A COLLECTION 01 PERFORATED STONE OBJECTS, FROM THE GARIOCH, ABERDEENSHIRE. BY J. GRAHAM CALLANDER, F.S.A. SOOT. Many perforated article f stono s f greateo e r leso r s antiquity have been found, the use of which we have no difficulty in defining. Among such article e stonar s e axes, stone hammers, whorls, beads d sinkan , - stones for nets or lines; but this collection of perforated stones from Central Aberdeenshire seems to be quite different from any of the recog- nised types. Localities.—The collection, which consist f sixty-fivo s e specimenss ha , been gathered during the last five years in the Garioch district of Aber- deenshire from eight different localitie n fivi s e parishes :—Elevee ar n from Newbigging, parish of Culsalmond ; one is from the Kirkyard of Culsalmond; five are from the adjoining farms of Jericho and Colpy, Culsalmond e froar m o Johnstonetw ; , paris f Leslio hs froi e me ;on Cushieston, parish of Rayne; one is from Lochend, Barra, parish of Bourtie; thre froe ear m Harlaw, paris f Chapeho f Garioco l fortyd an h; - one are from Logie-Elphinstone estate, also in Chapel of Garioch. e specimenth l Al s have bee e ploughnth turney b , p nonu d e having been found associated with burials or dwelling sites; at the same time many flint implements have been foun e localitiemosn th di f o t s named, especiall firste th , n yi third last-mentioned an , d ones, these I believe, , having been more thoroughly searched. -
History Lesson -- a Look at How Construction Tools Have Evolved
TOOLSCool R A Look at How Construction Tools Have Evolved By Steven Ferry As you purchase, use, repair or swear at the tools used on the job, you probably don’t give a second thought to how far we have come in our ability to swiftly and safe- ly erect and finish ever larger, taller and more durable homes, offices, factories and other buildings in the United States. In 400 years, we have moved from the crude grass and hide structures of the first settlers to timber, brick, con- crete, steel, glass and now plastic material-in the process freeing the builder from the need to also man- ufacture or find the building materials. We can create whatever climate we want indoors while remaining impervious to the one outside. Design tools have moved from ideas in the builder’s head, and the occasional sketch, to computers. Code officials, architects and consultants in everything from construction management to quality control have made building into a series and sequence of high- ly specialized activities that together bring about the fabulously efficient constructions of today—efficient in terms of outlay of effort in the construction and running of the buildings. Pivotal to all the successes in construction are the tools we use to accomplish the work on the job site. If Henry David Thoreau Published by AWCI 97 had thought back to the time he spent then finished with an “adz,” an ax building his cabin in the woods, he shaped like a hoe. The adz-man either might not have insisted that men had stood or sat on the timber and cut become the tools of their tools. -
Types of Tap
Types of Tap HAND TAPS ISO 529 These are straight flute general purpose tools which can be used for both machine or hand tapping. They are generally the most economical tool for use on production runs, but are best on materials that produce chips, or where the swarf breaks readily. Where deep holes are to be tapped, in materials which produce stringy swarf, serial taps may be needed, especially for coarse threads. ISO 529 hand taps can be supplied in sets of three; bottom, second and taper leads, or individually. BOTTOM TAPS have a chamfer (lead) of 1–2 threads, the angle of the lead being around 18 degrees per side. They are used to produce threads close to the bottom of blind holes. SECOND TAPS have a lead of 3-5 threads at 8 degrees per side. They are the most popular and can be used for through holes, or blind holes where the thread does not need to go right to the bottom. TAPER TAPS have a lead of 7-10 threads at 5 degrees per side. The taper lead distributes the cutting force over a large area, and the taper shape helps the thread to start. They can therefore be used to start a thread prior to use of second or bottom leads, or for through holes. IMPORTANT NOTE ON TERMINOLOGY! In the U.K. bottom taps are often referred to as ‘plugs’. In North America second taps are often referred to as ‘plugs’! This can easily lead to confusion. To avoid problems when ordering it is best to use the terms bottom, second and taper. -
Foil Rubbings
OUTDOOR ACTIVITIES Fire Lighting, at Home Fire provokes great memories, wistfully Environmental watching the flames dance around. A Awareness guide to safe methods to light a fire, Understand the impact of human activities on the environment. whether it is on tarmac or in the garden. Time: Combine with our food cooking sheets. 40 min plus Remember there should be a purpose to lighting fires to cook Space: or keep warm. Please be careful of where you light fires, Any Outdoor Space, that keep it in control. Never leave a fire unattended and belongs to you supervise children to prevent burns. Make sure you have a Equipment: bucket of water close by to put out any unwanted fires and to Twigs & Sticks, Matches. extinguish at the end. Maybe vaseline / fire lighter, tin or BBQ tray Location: If you’re restricted on space then disposable BBQ trays, traditional metal BBQ’s or even a ‘fray bentos’ tin (wide and shallow)work well to contain the fire. If you have grass in your garden dig up 30cmx30cm square of turf for a small fire. The turf can be replaced later unburnt. Sand, stones or soaking with water around the pit edge can prevent the fire spreading on dry grass. Fuel: To start the fire, easy to light iems would include dry leaves, bark and household items like lint from washing machines, newspaper and cotton wool. Collect a range of twigs and sticks. This may have to be done on a seperate scavenging walk in the local area. Make sure there is a range of thicknesses from little finger, thumb to wrist thickness. -
In the Autumn 2011 Edition of the Quiver I Wrote an Article Touching on the Topic of Survival As It Applies to the Bowhunter
In the Autumn 2011 edition of The Quiver I wrote an article touching on the topic of survival as it applies to the bowhunter. In this article I want to talk about fire specifically and the different types of firestarters and techniques available. Fire is an important element in a survival situation as it provides heat for warmth, drying clothes or cooking as well as a psychological boost and if you’re hunting in a spot where you are one of the prey species it can keep predators away as well. There are many ways to start a fire; some ways relatively easy and some that would only be used as a last resort. There are pros and cons to most of these techniques. The most obvious tool for starting a fire is a match. While this is a great way to start a fire in your fireplace or fire pit I personally don’t like to carry matches in my pack or on my person. They are hard to keep dry and you are limited to one fire per match IF you can light a one match fire every time. It would be easy to run out of matches in a hurry as you are limited in how many you could reasonably carry. A Bic lighter or one of the more expensive windproof lighters is a slightly better choice for the bowhunter to carry. They are easy to use, easy to carry, fairly compact, and last for a reasonable amount of “lights”. They don’t work well when wet but can be dried out fairly easily. -
F I R I N G O P E R a T I O
Summer 2012 ▲ Vol. 2 Issue 2 ▲ Produced and distributed quarterly by the Wildland Fire Lessons Learned Center F I R I N G O P E R A T I O N S What does a good firing show look like? And, what could go wrong ? Once you By Paul Keller t’s an age-old truth. put fire down— Once you put fire down—you can’t take it back. I We all know how this act of lighting the match— you can’t when everything goes as planned—can help you accomplish your objectives. But, unfortunately, once you’ve put that fire on take it back. the ground, you-know-what can also happen. Last season, on seven firing operations—including prescribed fires and wildfires (let’s face it, your drip torch doesn’t know the difference)—things did not go as planned. Firefighters scrambled for safety zones. Firefighters were entrapped. Firefighters got burned. It might serve us well to listen to the firing operation lessons that our fellow firefighters learned in 2011. As we already know, these firing show mishaps—plans gone awry—aren’t choosey about fuel type or geographic area. Last year, these incidents occurred from Arizona to Georgia to South Dakota—basically, all over the map. In Arkansas, on the mid-September Rock Creek Prescribed Fire, that universal theme about your drip torch never distinguishing between a wildfire or prescribed fire is truly hammered home. Here’s what happened: A change in wind speed dramatically increases fire activity. Jackpots of fuel exhibit extreme fire behavior and torching of individual trees. -
Learning the Hand-Drill Method of Fire-By-Friction
Learning the Hand-Drill Method for Fire-by-Friction by Kato Haws Friction fires are not very practical, but they can be fun. The hand-drill method is less technical than the bow-drill method. You can learn to do it. The following are some ideas of how to proceed: Cut a 3/8” dry horseweed stalk about 24” long for your spindle, and check to see if it is straight. (Horseweed is very wide spread. See Wikipedia for pictures of horseweed). If necessary straighten the spindle using a heat source. Heat it, bend it, remove it from the heat source, and hold it straight as it cools. It is important to have a straight spindle. It is possible to find horseweed stalks that are straight, it just takes more looking. Cut or split a baseboard of white cedar fencing (no hole cedar) from the lumberyard about 11” long and 3/8” thick. I personally mark the board with a straight edge and a pencil and then cut it with a saber saw, but many methods can be used. A table saw would be ideal if you have one and know how to use it properly. Using a knife make a 3/8” dimple about an inch from the end of the baseboard. Spin the spindle in the dimple to seat it in. You don’t have to get actual smoke at this point. The main thing is to make sure exactly the spindle wants to spin before proceeding. Cut an inverted “V” from the edge of the baseboard toward the center of the dimple. -
Fire and Emergency Medical Services Operations and Data Analysis Flint, Michigan Center for Public Safety Management
Fire and Emergency Medical Services Operations and Data Analysis Flint, Michigan December 2014 FIRE EMS Operational Analysis Center for Public Safety Management 474 K Street, NW, Suite 702 Washington, DC 20001 www.cpsm.us – 716-969-1360 Exclusive Provider of Public Safety Technical Assistance for the International City/County Management Association General Information About ICMA The International City/County Management Association (ICMA) is a 100-year-old, nonprofit professional association of local government administrators and managers, with approximately 9,000 members located in 32 countries. Since its inception in 1914, ICMA has been dedicated to assisting local governments in providing services to its citizens in an efficient and effective manner. Its work spans all of the activities of local government—parks, libraries, recreation, public works, economic development, code enforcement, brownfields, public safety, etc. ICMA advances the knowledge of local government best practices across a wide range of platforms including publications, research, training, and technical assistance. ICMA’s work includes both domestic and international activities in partnership with local, state, and federal governments as well as private foundations. For example, it is involved in a major library research project funded by the Bill &Melinda Gates Foundation and it is providing community policing training in Panama working with the U.S. State Department. It worked in Afghanistan assisting with building wastewater treatment plants and has teams in Central America working with SOUTHCOM to provide training in disaster relief. Center for Public Safety Management LLC The ICMA Center for Public Safety Management (ICMA/CPSM) is one of four Centers within the Information and Assistance Division of ICMA providing support to local governments in the areas of police, fire, EMS, emergency management, and homeland security. -
2006 Mandalay Owners Manual
MANDALAY09/2006 MANDALAY MANDALAY TABLE OF CONTENTS TABLE OF CONTENTS MANDALAY LIMITED WARRANTY WHAT IS COVERED . .1-1 LIMITATIONS AND DISCLAIMER OF IMPLIED WARRANTIES . .1-1 LIMITED STRUCTURAL WARRANTY (5 YEARS/60,000 MILES) . .1-2 HOW TO GET SERVICE . .1-2 WHAT IS NOT COVERED . .1-3 LEGAL REMEDIES/ARBITRATION . .1-4 MANDALAY OWNER’S REGISTRATION CARD . .1-5 MANDALAY OWNER’S REGISTRATION CARD . .1-7 MANDALAY LIMITED WARRANTY TRANSFER APPLICATION . .1-9 GENERAL INFORMATION INTRODUCTION . .2-1 ROADSIDE ASSISTANCE PROGRAM . .2-3 24-Hour Customer Care Benefits . .2-3 NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION . .2-4 SYMBOLS . .2-5 DISCLAIMER . .2-6 IDENTIFICATION & SAFETY REPORTING SAFETY DEFECTS . .3-1 MOTORHOME SERIAL NUMBER DECAL & DATA PLATES . .3-1 MANUFACTURER’S WARRANTIES . .3-2 SAFETY REGULATIONS FOR LP GAS SYSTEMS & APPLIANCES . .3-3 FIRE SAFETY . .3-4 FIRE EXTINGUISHER . .3-5 CARBON MONOXIDE & SMOKE DETECTOR . .3-6 Programming the Alarm . .3-7 Testing Procedure . .3-7 Carbon Monoxide Safety Precautions . .3-8 LP GAS DETECTOR . .3-9 Maintenance . .3-9 How to Test . .3-10 Checking the LP Gas System for Leaks . .3-10 About the LP Gas Detector . .3-11 Most Common Causes of Apparent Malfunction . .3-11 Service . .3-12 LP Gas Safety Precautions . .3-12 MANDALAY TABLE OF CONTENTS IDENTIFICATION & SAFETY CONTINUED... CHEMICAL SENSITIVITY . .3-13 Formaldehyde . .3-13 Ventilation . .3-13 SEAT BELTS . .3-14 Seat Belt Operation . .3-14 Maintenance . .3-14 Child Restraints . .3-15 Booster Seats . .3-15 EGRESS WINDOW . .3-16 CHASSIS OPERATIONS & PROCEDURES BRAKES . .4-1 WHEELS & TIRES . .4-2 DAMAGED OR FLAT TIRES . -
Fire Safety Merit Badge Pamphlet
FIRE SAFETY BOY SCOUTS OF AMERICA MERIT BADGE SERIES FIRE SAFETY “Enhancing our youths’ competitive edge through merit badges” Fire Safety 1. Do the following: (a)Demonstrate the technique of stop, drop, cover, roll, cover your face, and cool. Explain how burn injuries can be prevented. (b)List the most frequent causes of burn injuries. (c)Explain how to safely discard and store flammable liquids. 2. Explain the chemistry and physics of fire. Name the parts of the fire tetrahedron. Explain why vapors are important to the burning process. Name the products of combustion. Give an example of how fire grows and what happens. 3. Name the most frequent causes of fire in the home, and give examples of ways they can be prevented. Include a discussion about fires caused by smoking in the home, cooking, candles, fireplaces, and electrical appliances. 4. Explain the role of human behavior in the arson problem in this country. 5. List the actions and common circumstances that cause seasonal and holiday- related fires. Explain how these fires can be prevented. 6. Conduct a home safety survey with the help of an adult. Then do the following: (a)Draw a home fire-escape plan, create a home fire-drill schedule, and conduct a home fire drill. (b)Test a smoke alarm and demonstrate regular maintenance of a smoke alarm. (c)Explain what to do when you smell gas and when you smell smoke. (d)Explain how you would report a fire alarm. (e)Explain what fire safety equipment can be found in public buildings. (f)Explain who should use fire extinguishers and when these devices can be used.