Speaking to High School Students

I was asked to speak at The Washington Youth Summit on the Environment (WYSE) to a small group of the delegates about my career as environmental engineer/health scientist. The delegates are high school students. I’ve never done anything like this before, and I can’t remember the last time I’ve spoken to a group of high school students about anything. I was told to talk about my career and talk about specific projects on which I’ve worked. I prepared a few slides on the basics of risk assessment as that is the general field in which I work now and then quite a few slides on my dissertation and a few slides on the project I am currently working at work. I wasn’t sure what to expect. Would they be interested in this at all? Would my slides be interesting or too far over their heads? I took out what I thought were the more advanced and complicated slides and just focused on graphs and photos. I wanted to focus on the big picture.

Part of my problem with giving this presentation was, the more educated you become, the more you take for granted what other people know. At least, I have that problem. I have had so much math education including three semesters of calculus, differential equations, linear algebra, probability, statistics, and biostatistics, that I’m flabbergasted when I meet people who can’t do or understand basic algebra or understand what a square root is. Certainly, you can make an argument that this is a sign of the failure of the US education system, but people’s education level is what it is. If you want to explain something to someone, than you have to be able to explain it to them on their level. These are high school students, and I can’t expect them to know information that is not taught until college or after. Thus, I have a group of high school students that I need to talk to about the work that I do and the work I did to earn my Ph.D. I am not entirely sure how to do this. I don’t quite frankly remember what I knew in high school. I have no idea what these students know. I don’t want to bore and confuse them by talking at so high a level that they can’t understand me, but I don’t want to insult them by explaining things they already know.

I am really not sure how I did. The one thing I am fairly sure about is that I babbled and rambled a few times. I am really not the best speaker. I am not a bad speaker, but I do much better if I have a set text that I am reading or very specific things with high points written on slides. I didn’t do that for this talk because I wanted to be able to change what I was saying once I got there and started getting questions. They did ask me questions. They asked me great questions in fact. However those questions made me realize just how much I know and forget that other people don’t know. That is in no way meant to be an insult to these students. I was really impressed with them. Like I said, they asked great questions. Also, they were very polite and politely listened even when I am sure I started to ramble. I really appreciated their attentiveness, and I loved their questions.

For example, one of the first questions I got was on one of my first slides, which had the word epidemiology on it. I was asked “what is epidemiology?” This is probably where it hit me that I had no idea what they knew. It didn’t really dawn on me that some (or all) would not know what that word meant and what that science field is. Again, that is not an insult to them. If anything, I was annoyed with myself for not considering when I learned that word. I am glad I was asked the question. It gave me a chance to tell them about John Snow and the London cholera epidemic. I am fairly sure all epidemiology courses are legally required to start with a discussion on John Snow and the London cholera epidemic, so I had fun telling them about it.

I can’t remember all the questions I got, but I got quite a few. I loved this because that meant the person asking the question was listening and engaged. When I describing issues related to soil and groundwater contamination, I got a very simple question as to how these chemicals get into the soil and groundwater. I LOVED this question. I can’t describe all the reasons why I loved this question, but one is because I am an engineer, and I get frustrated when people think we build things and then no maintenance is ever needed. Bridges in the US keep falling down, and the American Society of Civil Engineers gives our infrastructure a D+ grade. One of the reasons is lack of maintenance. I got to explain to the students about maintenance and inspections and things simply not being designed or built to last forever. I also explained how decades ago, people used to just dump chemicals in the ground or water and never think of the consequences.

I also got some questions of how to find out more information on different topics and things I discussed. They wanted to know more. As I always want to know more, how could I not like these students? I hope some of them already have or are now on the internet reading more about the topics I only lightly discussed. Maybe one day I will meet them again professionally.

Solar Impulse

Solar Impulse, the solar powered plane that can store enough energy to fly through the night, is currently at Udvar-Hazy Center. The plane is a marvel of engineering both from the standpoint of being able to collect enough solar energy during the day to power itself all day and through the following night but also from the standpoint of being light enough in weight that it needs very little energy to keep it flying. I went to see it while it was open for public viewing Saturday, and from an engineering perspective, it is just beautiful. When viewed in person, you can see how the plane is covered in high strength fabric. In the back stabilizer, you can see the internal structures that give the stabilizer its shape. It is just an amazing vehicle. Note: If you click on any of the photos, it will open up larger in a new page to allow a better look.

front panorama of Solar Impulse

front panorama of Solar Impulse

Side panorama of Solar Impulse

Side panorama of Solar Impulse

Solar Impulse cockpit and middle two propellors

Solar Impulse cockpit and middle two propellors

view down the wing span

view down the wing span

Tail and stabilizer

Tail and stabilizer

View of stabilizer from side showing internal support

View of stabilizer from side showing internal support

View from below stabilizer showing internal supports and photovoltaic cells above

View from below stabilizer showing internal supports and photovoltaic cells above

Solar Impulse wing flaps with photovoltaic cells on top

Solar Impulse wing flaps with photovoltaic cells on top

View between wing flaps using my zoom lens to show wires connecting photovoltaic cells

View between wing flaps using my zoom lens to show wires connecting photovoltaic cells

Giant Shiny Ball Play Thing

Last night, I went to Cultural Programs of the National Academy of Sciences (CPNAS)‘s D.C. Art Science Evening Rendezvous (DASER). It is a monthly discussion forum on art and  science. They always have interesting speakers, and it is one of the cool things about living in the DC area. Anyway, last night upon walking into the room right before the program began, I was immediately intrigued by this enormous sphere siting in the corner of the room, which I dubbed the Giant Shiny Ball Play Thing.satelloon

I had no idea what this thing was, and there was no mention of it in the program. I envisioned the amazing game of beach ball toss that a large crowd could play with it. The Giant Shiny Ball Play Thing was seriously one of the coolest things I had ever seen, and I wanted one. Sure it was probably about 10 feet in diameter and would never fit in my house. Even if it did fit in my house, putting a shiny inflatable ball in the same house with my cat and her claws would not end well at all.

I finally found out that the Giant Shiny Ball Play Thing is a reproduction of a satelloon. Greg Allen, one of the speakers, had it fabricated as part of his Exhibition Space exhibit. A satelloon is satellite balloon, of course, and I’m going to bet that either an engineer or scientist came up with that name. NASA made satelloons for Project Echo from 1956-1964. I am not going to describe the whole history because Greg Allen has a great summary of the project and the amazing satelloons. If you want even more history, you can read about it straight from NASA. The history is fascinating.

Thus the Giant Shiny Ball Play Thing is really a symbol of some incredible science and engineering history. I still want to play with it though. Also, I took a fun self portrait of myself in the satelloon.

satelloon and meThere, dear readers, now you know what I look like.

Finally, if like me, you can’t get enough of the Giant Shiny Ball Play Thing, Heather Goss created this fun Vine video of it being deflated.

Kilograms Do NOT Measure Weight

I think like many engineers, one of the reasons that I liked the idea of going into engineering was the mistaken belief that a career in engineering meant working with numbers and not having to write. I have never been very good with words. I love numbers. Numbers make sense to me. Words confuse me at times. Also, the English language in general makes no logical sense to me, and I am a native English speaker. [Well, I’m a Southern, so you can go ahead and make an argument against the native English speaker part.] I can’t spell worth crap because of the aforementioned English language illogical thing. This is actually fairly common among engineers. Had my family known the warnings signs, it would have been obvious since I was about 5 years old that I was destined to be an engineer. I have always been good with numbers, and I can’t spell worth crap. Take note parents, as these are the warning signs your child may be an engineer. Also, an early love of duct tape.

I am fairly good with grammar though probably because there are more rules and less exceptions. Partially because of this and for other reasons, at my current job, I often edit other people’s documents not just for science and engineering accuracy but also for grammar, readability, and clarity. I have also been a peer reviewer for a few manuscripts submitted to scientific journals, and previously, I used to edit manuscripts that were about to be submitted to peer review journals. I keep coming across certain words and phrases that are scientifically and grammatically incorrect. There are many grammar style manuals that exist, but I have yet to come across a science grammar style manual. If one exists, I would love for someone to point me to it. So I’ve decided to start writing about some of the most common and inappropriate phrases in the hope that maybe it will stop at least one one person from using these incorrect phrases.

The most common and completely wrong phrase I see is stating that something or someone weighs a certain number of kilograms. Ironically, non-US citizens, i.e. people who live in a country where they use the metric system, are just as guilty of this phrase as US citizens who sort of have the excuse that they live in a country that refuses to stop using the completely archaic and impossible to use if you are a scientist or engineer, English imperial or US customary units. For the benefit of everyone who doesn’t understand why this is wrong, let me explain why it is.

A kilogram is a unit of mass. Mass is the amount of stuff that an object has.

To say something weighs something, you are saying it has a certain amount of weight. A weight is a specific type of force, and because it is a force, weight, like all other forces, is measured in Newtons (N) in the metric system. Weight is the amount of force on an object due to gravity. Therefore, weight is the mass (the amount of stuff) multiplied by the acceleration due to gravity. If you happen to be a person on Earth with a mass of 70 kg, then since the gravitational acceleration on Earth is 9.81 m/s2, you have a weight of 687 Newtons (N). Let’s say you happen to be an astronaut, and the Moon program gets revived, and you go to the moon. Your mass will not change. Your mass will still be 70 kg, but once you arrive at the Moon, your weight will be about 114 N because the Moon’s gravitational acceleration is 1.63 m/s2. While you are on your journey to the Moon in space, there will be no gravity, so you will have no weight. You will be weightless, hence the fun videos of astronauts floating, but you will still have the same 70 kg mass.

To review, a person or an object has a mass that can be measured in kg. A person or an object that is on any celestial body with gravity has a weight that can be measured in N. It is completely incorrect to say that a person or an object has a weight in kg. It is also confusing. Does it mean you have a mass in that number of kg? Does it mean you have a weight in that number of N, not kg? Please, don’t use kg and say weight. Mass and weight are not interchangeable. They do not mean the same thing.

Master Closet Shelving

As part of Home Renovation Phase II, I stole space from the living room to create a walk-in master closet. The master bedroom had a small walk-in closet that led to the very small master bathroom. In Home Renovation Phase III, planned for sometime next year, I intend to create a nice size master bathroom using both the old master bathroom and closet. Thus, during Phase II, I created the new master closet. It is not spacious, but it is workable and has plenty of storage room for two people. It includes tall hangings, double hangings, shoe shelves, clothes shelves, and drawers. It is 124 inches long and 72 inches wide. That leaves the standard 24 inches for hanging areas on both walls and a 24-inch aisle. I bought the components from Closets To Go, and the color is Sunset Cherry. I really like the way it came out, but I would like to have a conversation with whoever wrote the assembly directions. Why is it so impossible for companies to actually check their assembly directions for accuracy? Also, there were a few issues that I solved using the engineer’s standby of fixing it by taking a hammer and banging the crap out of it.

With the master closet completed, Phase II of my home renovation is finally done 13 months after it was started. Yes, it took a long time, but I did much of the work myself.

newly created master closet

newly created master closet

finished master closet

finished master closet

shoe shelves

shoe shelves

clothes shelves

clothes shelves

One Million Bones

From June 8-10, One Million Bones was on the National Mall. A social art practice, it consisted of one million bones made by students, artists, and activists. It is to honor and bring awareness to those lost to genocide and mass atrocities in Sudan, South Sudan, the Democratic Republic of Congo, Burma, Somalia, and Syria. The vast majority of the bones seemed to be made of molded paper, but there were also many made of clay, plaster, resin (possibly glass), yarn, tape, and other materials. It was quite breath taking, thought provoking, and somewhat depressing.

bones washington monument bones sacrums bones femur pattern bones fibula tibiabones fieldbones hands bones knitted bones resinbones black and white skulls bones clay skull bones color paint skull

Cicada Attacks Teddy Roosevelt

At the National’s games, in the middle of the fourth inning, the Presidents race. Evidently, poor Teddy Roosevelt has only won few times. At today’s game against the Minnesota Twins, Teddy had an early lead, breaking far away from the rest of the pack. Then he got attacked by a giant 17 year cicada. Seriously, he did. Poor guy was left on the ground while the rest raced by him. Then George Washington won. I think George Washington won. At that point I was too confused by the fact that Teddy got attacked by a cicada. I thought cicadas were harmless but noisy insects. Evidently they can be vicious. On a side note, I am beginning to wonder if the President’s race might be fixed.President's race 1 President's race 2 President's race 3 President's race 4 President's race 5 President's race 6 President's race 7

Run or Dye

I came. I ran. I dyed. [I did not die though.]

Today I ran in Run or Dye. It is the very definition of a fun run. After running two fun runs, I have come to the realization that I need some insane fun run clothes. I don’t know when tutus became a thing at fun runs, but many people were wearing them today and at the Turtle Trot. Some people are even more inventive. Most people wore some white because during and after the race, they throw dye on you, so the white really helps to show off the dye. On a side note, according the packets of dye, the dye is made of cornstarch, food dye, and flavoring. I unintentionally got some of the dye in my mouth, and I have to wonder if the flavoring is to make you NOT want to eat it, as opposed to for what flavoring is normally used. Also not that you want to know this, but probably like everyone, I inhaled some dye. I have being blowing out some extremely amusingly colored mucus.

I am not trying to be philosophical, but a common phrase people use goes something like “I don’t care if he is white, black, brown, purple, or green” or some variation of that. Generally it is used to indicate that the speaker or some program or whatever is not racially discriminatory. After the race, I was just observing all the people covered in varying degrees with all the bright dyes. It occurred to me that at that moment, for once there really was some purple and green people. Funny thing was, with many people, they really were pink, purple, green, or some other color. Some people were covered so thoroughly that it was really difficult to tell what their skin color was. I thought it was wonderful. It was just a bunch of happy, sweaty, insanely colored people having a marvelous time.

I have never seen this many fluorescent socks.

I have never seen so many fluorescent socks before.

Lined up, waiting to run. Look how clean everyone is. That will change.

Lined up, waiting to run. Look how clean everyone is. That will change.

The suspenders are holding up the hula skirt because how else are you going to keep a hula skirt on when you have no hips?

The suspenders are holding up the hula skirt because how else are you going to keep a hula skirt on when you have no hips?

Tutus are now a thing at fun runs evidently.

Tutus are now a thing at fun runs evidently.

I don't know if they are actual medical professionals or if they just like to run in scrubs.

I don’t know if they are actual medical professionals or if they just like to run in scrubs.

With a sailor's hat, covered in dye

With a sailor’s hat, covered in dye

"I thought they said rum or dye"

“I thought they said rum or dye”

Covered in dye and happy

Covered in dye and happy

Man in full body suit. I have no idea why.

Man in full body suit. I have no idea why.

I'm curious how the feathers stayed in while they ran

I’m curious how the feathers stayed in while they ran

Some people really dressed for the occasion. The woman in the middle needs to up her game though.

Some people really dressed for the occasion. The woman in the middle needs to up her game though. (It appeared to be a wedding dress.)

The dye party after the race with clouds of dye being thrown

The dye party after the race with clouds of dye being thrown

The dye party after the race with clouds of dye being thrown

The dye party after the race with clouds of dye being thrown

The dye party after the race

The dye party after the race

Central Park in June

I love New York City’s Central Park. Then again, I suppose anyone who has ever been there loves it. I spent part of my recent trip to New York wandering around Central Park. Here are a few photos from my visit.

Jacqueline Kennedy Onassis Reservoir

Jacqueline Kennedy Onassis Reservoir

Jacqueline Kennedy Onassis Reservoir

Jacqueline Kennedy Onassis Reservoir

The Lake

The Lake

stone staircase

stone staircase

rock outcrop

rock outcrop

metal bridge

metal bridge

ravine

ravine

rose

rose

flame azalea

flame azalea

allium flower

allium flower

Belvedere Castle

Belvedere Castle

carved concrete column

carved concrete column

 

 

 

 

My First Trip to Brooklyn

I’ve been to New York City numerous times, but for as many times as I’ve been, I’ve never ventured outside of Manhattan. My guess is I’m not the only tourist who has done this. On this past trip, I decided I need to explore a bit of Brooklyn, partially because I wanted to go to the New York Transit Museum. Brooklyn is huge, so I couldn’t see everything, but I walked around a bit of downtown, Brooklyn Heights, and DUMBO. Downtown Brooklyn has some nice office and municipal buildings and a nice little park.

Brooklyn Borough Hall

Brooklyn Borough Hall

Cadman Plaza Park

Cadman Plaza Park

Then I walked to the Brooklyn Promenade, which is just a lovely elevated park-like walk area with spectacular views of Upper New York Bay, downtown Manhattan, and the East River.

Brooklyn Promenade

Brooklyn Promenade

Brooklyn Promenade

Brooklyn Promenade

view of downtown Manhattan from Brooklyn Promenade

view of downtown Manhattan from Brooklyn Promenade

view of Statue of Liberty from Brooklyn Promenade

view of Statue of Liberty from Brooklyn Promenade

view of East River from Brooklyn Promenade

view of East River from Brooklyn Promenade

Then I walked to the area around the Brooklyn Bridge tower.

Underneath the Brooklyn Bridge

Underneath the Brooklyn Bridge

Manhattan Bridge as seen from Brooklyn Bridge Park

Manhattan Bridge as seen from Brooklyn Bridge Park

I then walked to DUMBO (Down Under the Manhattan Bridge Overpass). It has a nice waterfront area as well as some neat shops. Also, it has hipsters.

Manhattan Bridge Arch

Manhattan Bridge Arch

Finally I walked around Brooklyn Heights. It is a lovely area with classic tree lined streets of row houses.

Brooklyn Heights

Brooklyn Heights

Brooklyn Heights

Brooklyn Heights

Those are the highlights of my first trip to Brooklyn. There is still more to explore. I shall return someday.