energy
Tracing Power Lines with the Pylon Appreciation Society
Pylons
Not all the towers along a transmission line are identical. Look closely at a tower where the line makes a sharp turn and you will likely find it is wider and beefier than other towers along the route. The added strength and weight are needed to resist the unbalanced pull of the conductors, which might overturn an ordinary tower. These special towers are called deviation or angle towers.
The transmission-line tower everybody knows is an Erector Set latticework of steel girders and diagonal braces. The techniques for designing and building these towers are the same ones used in constructing steel bridge trusses or crane booms. The individual pieces can be made cheaply from rolled steel and then bolted together on the site. This last point is more important than it might seem: transporting a fully assembled tower 100 feet tall is an awkward and expensive business.
A haunting, syncopated music
"Rappers" on the roof of the electrostatic precipitator knock the accumulated dust free, letting it fall into the storage hopper. Each rapper is the size and shape of a baseball bat. Inside is an electromagnet that pulls a steel plunger upward, then allows it to fall again, producing a sharp knock. The rappers are energized at seemingly random intervals, producing a haunting, syncopated music. (The rhythm seemed more modern jazz than rap.)
Safety cut rope axe man
In the first nuclear reactor, constructed by Enrico Fermi in 1942 under the bleachers of the University of Chicago football stadium, the control rods were held up by a manila rope. A man with an axe was told to cut the rope if the reactor got out of hand. This "safety cut rope axe man" is supposedly the origin of the term SCRAM for an emergency shutdown procedure.
Color coding
Telephone wires erupt in a multicolor cascade in a ground-level, pedestal-type splice case on a city street.
Dividing the set of 10 colors into two contrasting groups of 5 allows for exactly 25 combinations with one color from each group; thus, each pair in a bundle can be uniquely colored. A similar color code is applied to the ribbons that bind together all the pairs in a bundle, and to those of the superbundles. The result is highly festive! A specific wire might be identified as the blue-red conductor within the orange-black bundle within the brown-yellow superbundle.
The Spoken and the Unspoken
What is unspoken
Ethnographic studies are distinct from ethological research in other species because we can speak with our subjects and ask them questions. This has tremendous value, but much of what humans do is not spoken, and we also observe, count, and measure.
Research questions
From my records, research questions emerged that I never expected when I was making them.
Quantitative data collection
Quantitative data collection involves systematic and repetitive observations on the same set of variables.
Anthropological rapport
Accurately capturing how people spend their time is contingent not only on systematic data collection, but also on participants moving in a relaxed and normal manner through their daily activities. Just as primatologists habituate their subjects to their presence, anthropologists first must develop rapport and trust with the communities in which they live.
Scan samples, focal follows
Scan samples and focal follows are two commonly used behavioral observation methods.
During a scan sample, randomly selected individuals are located at specified time intervals, usually every ten to fifteen minutes, and the observer instantaneously records what the participant is doing.
Focal follows complement scan samples by documenting the continuous sequence of an individual's activities. During a focal follow, each subject is observed over a period of several hours with each change in activity recorded with a start and stop time.
Multitasking
In most traditional societies children help care for their younger siblings. However, it is often the case that a child minding his younger sibling does so out of the corner of his eye while playing with other children. Is this play or child care?
A nested classificatory hierarchy
I organized behavioral codes to contain several levels of information. As in this example, if a child is outside playing with friends while minding her two-year-old sister, the activity was coded as 675: the 600 signifies noneconomic activity, the 70 that it is playing, and the 5 that it is playing while in charge of a child. All activities were coded in this way. A nested classificatory hierarchy preserves both detail for future research and flexibility to lump or disaggregate activities for analyses. This method of nesting information carries over into many kinds of coding and classificatory schemes.
A child's question
Because they live so successfully in their world, we expect our subjects to readily explain the strategies that underlie the behaviors we observe. This can be trying, because from their point of view we are asking the obvious, a child’s question.
The research agenda
Important connections are often made by accident, outside the bounds of our research agenda.