Showing posts with label weapons. Show all posts
Showing posts with label weapons. Show all posts

Wednesday, July 25, 2012

The Philosophy of the Technology of the Gun

By Evan Selinger - The Atlantic Jul 23 2012
 
Does the old rallying cry "Guns don't kill people. People kill people" hold up to philosophical scrutiny?


gun2.jpg
flickr/United States Air Force


The tragic Colorado Batman shooting has prompted a wave of soul-searching. How do things like this happen? Over at Wired,David Dobbs gave a provocative answer in "Batman Movies Don't Kill. But They're Friendly to the Concept." I suspect Dobbs's nuanced analysis about causality and responsibility won't sit well with everyone.

Dobbs questions the role of gun culture in steering "certain unhinged or deeply a-moral people toward the sort of violence that has now become so routine that the entire thing seems scripted." But what about "normal" people? Yes, plenty of people carry guns without incident. Yes, proper gun training can go a long way. And, yes, there are significant cultural differences about how guns are used. But, perhaps overly simplistic assumptions about what technology is and who we are when we use it get in the way of us seeing how, to use Dobbs's theatrical metaphor, guns can give "stage directions."


Instrumentalist Conception of Technology

The commonsense view of technology is one that some philosophers call the instrumentalist conception. According to the instrumentalist conception, while the ends that technology can be applied to can be cognitively and morally significant, technology itself is value-neutral. Technology, in other words, is subservient to our beliefs and desires; it does not significantly constrain much less determine them. This view is famously touted in the National Rifle Association's maxim: "Guns don't kill people. People kill people."

"The NRA maxim 'Guns don't kill people. People kill people,' captures the widely believed idea that the appropriate source to blame for a murder is the person who pulled the gun's trigger."
To be sure, this statement is more of a slogan than well-formulated argument. But even as a shorthand expression, it captures the widely believed idea that murder is wrong and the appropriate source to blame for committing murder is the person who pulled a gun's trigger. Indeed, the NRA's proposition is not unusual; it aptly expresses the folk psychology that underlies moral and legal norms.

The main idea, here, is that guns are neither animate nor supernatural beings; they cannot use coercion or possession to make a person shoot. By contrast, murderers should be held responsible for their actions because they can resolve conflict without resorting to violence, even during moments of intense passion. Furthermore, it would be absurd to incarcerate a firearm as punishment. Unlike people, guns cannot reflect on wrongdoing or be rehabilitated.


Beyond Instrumentalism: Gun Use

Taking on the instrumentalist conception of technology, Don Ihde, a leading philosopher of technology, claims that "the human-gun relation transforms the situation from any similar situation of a human without a gun." By focusing on what it is like for a flesh-and-blood human to actually be in possession of a gun, Ihde describes "lived experience" in a manner that reveals the NRA position to be but a partial grasp of a more complex situation. By equating firearm responsibility exclusively with human choice, the NRA claim abstracts away relevant considerations about how gun possession can affect one's sense of self and agency. In order to appreciate this point, it helps to consider the fundamental materiality of guns.

In principle, guns, like every technology, can be used in different ways to accomplish different goals. Guns can be tossed around like Frisbees. They can be used to dig through dirt like shovels, or mounted on top of a fireplace mantel, as aesthetic objects. They can even be integrated into cooking practices; gangster pancakes might make a tasty Sunday morning treat.

But while all of these options remain physical possibilities, they are not likely to occur, at least not in a widespread manner with regularity. Such options are not practically viable because gun design itself embodies behavior-shaping values; its material composition indicates the preferred ends to which it "should" be used. Put in Ihde's parlance, while a gun's structure is "multistable" with respect to its possible uses across a myriad of contexts, a partially determined trajectory nevertheless constrains which possibilities are easy to pursue and which of the intermediate and difficult options are worth investing time and labor into.

"A gun's excellence simply lies in its capacity to quickly fire bullets that can reliably pierce targets."
With respect to the trajectory at issue, guns were designed for the sole purpose of accomplishing radical and life-altering action at a distance with minimal physical exertion on the part of the shooter. Since a gun's mechanisms were built for the purpose of releasing deadly projectiles outwards, it is difficult to imagine how one could realistically find utility in using a gun to pursue ends that do not require shooting bullets. For the most part, a gun's excellence simply lies in its capacity to quickly fire bullets that can reliably pierce targets. Using the butt of a gun to hammer the nail into a "Wanted" post--a common act in the old cowboy movies--is an exceptional use.

What the NRA position fails to convey, therefore, are the perceptual affordances offered by gun possession and the transformative consequences of yielding to these affordances. To someone with a gun, the world readily takes on a distinct shape. It not only offers people, animals, and things to interact with, but also potential targets. Furthermore, gun possession makes it easy to be bold, even hotheaded. Physically weak, emotionally passive, and psychologically introverted people will all be inclined to experience shifts in demeanor. Like many other technologies, Ihde argues, guns mediate the human relation to the world through a dialectic in which aspects of experience are both "amplified" and "reduced". In this case, there is a reduction in the amount and intensity of environmental features that are perceived as dangerous, and a concomitant amplification in the amount and intensity of environmental features that are perceived as calling for the subject to respond with violence.

French philosopher Bruno Latour goes far as to depict the experience of possessing a gun as one that produces a different subject: "You are different with a gun in your hand; the gun is different with you holding it. You are another subject because you hold the gun; the gun is another object because it has entered into a relationship with you." While the idea that a gun-human combination can produce a new subject may seem extreme, it is actually an experience that people (with appropriate background assumptions) typically attest to, when responding to strong architectural configurations. When walking around such prestigious colleges as Harvard and the University of Chicago, it is easy to feel that one has suddenly become smarter. Likewise, museums and sites of religious worship can induce more than a momentary inclination towards reflection; they can allow one to view artistic and spiritual matters as a contemplative being.


gun1.jpg
flickr/robertnelson



The Brave One

The points about guns made by Ihde and Latour are poignantly explored in the 2007 film The Brave One. Unfortunately, many critics examined the film through a humanist lens, and bounded by its conceptual limitations, offered damning reviews. Many depicted the movie as a hyperbolic revenge film. All they saw was a gun blazing Jodie Foster playing a character named Erica Bain who copes with a violent assault (that kills her fiancé and leaves her in a three week coma) by moving through one scene after another of gratuitous vigilante violence, using an illicitly acquired 9mm handgun to settle scores and punish criminals that the law cannot touch. A stir was even caused by the following so-called "liberal" remarks that Foster made during an interview:
I don't believe that any gun should be in the hand of a thinking, feeling, breathing human being. Americans are by nature filled with rage-slash-fear. And guns are a huge part of our culture. I know I'm crazy because I'm only supposed to say that in Europe. But violence corrupts absolutely.
The critics failed to grasp a point that Foster herself underscored in numerous interviews.

Despite its market-driven name, the film is not primarily about human virtues or vices. It does not try to discern whether there is an essential experience of bravery or cowardice, and the extent to which characters in the film personify such ideals. Rather, it is an existential meditation that centers on what Foster calls a "deeper and scarier" theme. Looking beyond the explicit plot and its correlative bursts of visually disturbing depictions of violence, makes it becomes possible to recognize that the film explores the anti-essentialist thesis that people are not unified subjects, but instead are beings with fluid and re-negotiable identities. Especially in the face of trauma, people can abandon old lives and start new ones. In the case at issue, Erica goes from being a woman who lives a relatively disembodied existence -- a radio host who collects the sounds of NY city by blending into its background; a minor celebrity who refuses an offer to appear on television by suggesting that she is more of a voice than a seductive face; and a lover who, at the beginning of the film, is visually contrasted with an athletic looking, long-haired, male-nurse fiancé -- to a someone who can kill in cold blood without experiencing the quintessential physical sign of remorse, shaky hands.

By depicting Erica's metamorphosis as a shift away from disembodiment that is brought by means other than consciousness-raising or personal affirmation, The Brave One challenges the instrumental conception of technology. Erica's transformation is so explicitly and thoroughly dependent upon technological mediation that the audience is led to infer that without the gun, she would be radically debilitated by her beating; her fate would lie in becoming an apartment-bound recluse.

Reflecting on the centrality of technological mediation to the plot, Foster uses phenomenological language and tells the media that the gun "opens up a world" in which Erica is viscerally "materialized" and therein drawn to dangerous situations (e.g., late night trips to a convenience store and subway) where there is an increased likelihood of encountering violence. Since Erica enters these places because of a technologically induced desire, and not because she is deliberately seeking retribution, it may be fitting to consider the gun -as Latour might suggest, through his notion of "symmetry" -- one of the "actors" in the film.

To be sure, The Brave One is just a movie. It isn't a scientific study and it does feature a character who has come undone. But if philosophers like Ihde and Latour are right, we've got more in common with her than most are willing to admit. And this possibility ups Dobbs's already high metaphorical ante.

(thanks to my friend Bob for making me a ware of this article.--jef)

Friday, June 1, 2012

An Analysis of Blaster Fire in Star Wars


By Rhett Allain  - WIRED Science - May 24, 2012 




You have no idea how long I have been planning to look at the blasters in Star Wars. No idea. Finally, the 35th Anniversary of Star Wars has motivated me to complete my study (which I haven’t actually started). Here is the deal: What are these blasters? How fast are the blaster bolts? Do the blasters from the spacecraft travel at about the same speed as the handheld blasters? Why do people still think these are lasers?

Lasers, They Are Not
I am almost certain (almost) that nowhere in the Star Wars movies (even in Episode I) does a character refer to these as “lasers.” Really, there isn’t much to talk about here that hasn’t been discussed a thousand times before. In short, there are two things. First, if they were lasers, you wouldn’t be able to see them from the side very well. You have a red laser pointer, right? You don’t really see the beam unless it is going through something like chalk dust. I am sure some geek out there has a great explanation for why you could still see the beam (like non-Earth-like atmospheres or maybe all the scenes really take place underwater). However, it doesn’t matter. See the next point.

The second point is that lasers travel at the speed of light. Yet clearly, you can see that these beams have some speed that is much smaller than the speed of light. How much smaller? I don’t know — but I am going to find out.

How Do You Find the Speed of a Blaster Bolt?
I don’t think there is one answer to this question. I think the answer depends on the scene. Well, let’s get started then. Here is the first blaster fired in Star Wars:

A new Hope.mp 4

How do you get the speed of this bolt? First, how big is this smaller spaceship? How far away is it from the Star Destroyer that is chasing it? Is perspective a big problem? In this case, I am just going to make some wild estimates. Let me just go to the Starship Dimensions page — which sort of feels like cheating, but oh well. If you haven’t been to this site, I highly recommend you go there now.

Here is the Rebel Blockade Runner listed at 150 meters long.


Blockaderunner 1

Great, but how far apart is the Star Destroyer from the Blockade Runner?


Dd


Perspective and camera angle are a big problem here. I am just going to go with a distance of 10 +/- 3 Blockade lengths. In meters, maybe I could say 1,500 +/- 500 meters (which is a different estimate). That seems pretty far, but oh well. Now for the analysis. Of course I will use Tracker Video even if just to get the times for these blaster bolts. Surprisingly, for a few shots I was able to capture the position in three different frames. This doesn’t mean too much since I didn’t account for perspective, but here is a plot.

Jkkjk


Even though I fit a line, let me just look at the time of flight — about 0.08 seconds. If I use the distance above, I can say the bolt speed is about 1.807 x 105 m/s with an uncertainty of about +/- 6,000 m/s. Here I assumed the uncertainty in the time was sufficiently small to be ignored (compared to the uncertainty in the distance). Also, I am using the “Crank Three Times” method for estimating the uncertainty — just because it is easier.

What about non-space shots? Here is the very next shot fired in the movie:


stroom


I know it is a poor frame, but I want to be complete. This shows a Storm Trooper busting into the Blockade Runner and showing the Rebels who’s boss. The analysis of this shot is a little different. The camera seems to be far enough away that maybe I could try a real video analysis. Here, I assumed the distance from the Storm Trooper’s belt to top of his head was 0.71 meters (based on measurements of a full standing Storm Trooper — assumed height of 1.78 meters). Here is the plot from Tracker.

Stormshot 1


In this case, the slope of the position-time graph should be a fairly good approximation to the blaster bolt speed. This gives about 15 m/s. For uncertainty, let me say that there is an uncertainty in the distance of +/- 0.2 meters (an estimate). This would put the blaster bolt with a speed of 15 +/- 2 m/s. Already you can see a possible problem. The space bolts are way faster than the handheld bolts. Well, maybe this isn’t a problem so much as further evidence that they are not lasers. Lasers would all travel at the same speed.

Now, For More Data
Ok, that was just two examples. But there are many, many shots fired in Star Wars (I am leaving off the Episode IV: A New Hope part). Let me see if I can get more data from the rest of the shots.

After going through the whole movie, I would estimate that I have data on about 10 to 15 percent of all the shots. These would turn out to be complete guesses — especially the ones that were moving toward or away from the camera. So, what I have are 91 shots with data. 19 of these shots are “space” shots.

Here is the first plot. This is simply a histogram of all the non-space shots.

Blasterground.png

I didn’t include the space shots. You will see why after this histogram for just the space shots (except for the Death Star shot).

Spcashot 1.png

The blaster shots from spacecraft are just in a whole different speed range than the ground-based shots. There is one way to show them together — it is sort of a cheat. If I take the natural log of the speeds, you can see all the velocities in one histogram.

Drawings Summer 12.key 1

The red circle shows the data from the Death Star Shot. Yes, there is some overlap in speeds for the space and ground shots. Why? Well, there are a couple of far-away ground shots and a couple of close-up space shots (like when they show R2 in the X-wing fighter with shots whizzing past). But it still seems clear that these ground and space shots are different.

One other quick point: Why are there green blaster bolts in space, but for handheld weapons, they all fire red blaster bolts?

Special Case: The Death Star
I am not sure if this shoots “blaster fire” or not, but I analyzed it anyway. If the Death Star has a diameter of 160 km, then I can get a rough estimate for the speed of these things coming out as it destroys Alderaan (which is a peaceful planet without weapons). Here is a plot of the stuff before it combines into one beam.

Deathstar 1

The units here are in kilometers. So, this part would be about 6 x 105 m/s. Once the beams combine, I get a speed of 9.8 x 105 m/s. Oh. You have no idea what I am talking about here? Here is a shot:

Ds Beam 1

Here is the odd part: In the next shot, the beam is shown to travel toward Alderaan (a peaceful planet). It takes about 0.2 seconds for this shot to reach the planet. If the speed of the shot is constant, this would make Alderaan (a peaceful planet) only 196 km away from the Death Star. I’m not sure how big Alderaan (a peaceful planet) is, but the space station is about 300 km away from the surface of the Earth … so….

Why Different Speeds?
Don’t worry, I am not completely delusional. I know that Star Wars is just a movie. I know that Han’s blaster doesn’t really shoot anything except maybe blanks. Human beings have to actually draw these blaster bolts on the screen. Humans tend to draw things consistently on the frame independent of the setting.

OK. I should have done this the first time I went through these scenes, but let me make a plot of blaster speeds according to their angular speed on the screen. I will just assume the width of the video is 1 unit. Here is what I get.

Overlap.png

Essentially no difference in the two distributions.

Making It Work
Fine. So, the artists in Star Wars are just humans making human mistakes. Yes, but is there any way to fix this?

First, let me comment on the ground base’s blaster shots. The average for these things is just 34.9 m/s (78 mph). This is in the ballpark of a baseball pitch. Compare this to the speed of a Nerf gun bullet at about 10 m/s. This means two things:
  • A Jedi deflecting blaster bolts with a lightsaber is about the same as a baseball player hitting a pitched ball.
  • Playing with Nerf guns and plastic lightsabers in the backyard isn’t too terribly different than the movie.

Actually, it wouldn’t be all too terribly difficult for any normal person to dodge one of these blaster bolts — especially if it were fired from so far away. Maybe this explains why the Storm Troopers suck so bad and shooting. They don’t suck, it’s just that Han, Chewie, and Luke can easily dodge these bolts when far enough away. The Storm Trooper, on the other hand, can’t dodge. Why? Because those blasted helmets block their vision. You can’t dodge what you can’t see (well, except for Luke).

What about the discrepancy between space bolts and handheld bolts? I think this is mostly OK. They aren’t the same weapons, are they? Then they don’t have to have the same speeds. Simple. Really, the only thing you would need to fix is to make the speeds of these space blaster bolts consistently around the same speed. That means no more scenes showing shots flying past R2 at close range. The shots would just be too fast to see.

The other change would be to increase the speed of the blaster bolts from handheld weapons. If you wanted bullet-like speeds of around 500 m/s, what would change in the movie? Well, first thing is that there probably wouldn’t be any two consecutive frames where you see the same bolt. Really, that could be a simple change. If you see the gun firing, then don’t show the bolt. If you want to show “whizzing by” bolts, just show one. That way, a blogger like me wouldn’t really have a very good method for determining the speed of bolt. Problem solved.

One more thing. What is a blaster bolt anyway? It isn’t a laser, right? My guess has always been that it is some sort of super-hot thing. Maybe gas so hot it is a plasma. The problem with the gas is air drag. If the bolt has a low mass, I suspect that it wouldn’t get too far (especially at those low speeds). Perhaps the gas is so hot that it ionizes the air in front of it. Or maybe it is some type of really small, hot bullet. Honestly, I am not sure.

Preemptive Comments
You know what happens when you talk about Star Wars? Geekplosions. So, since I likely won’t be able to up with the comments — let me go ahead and preemptively answer some of them. Please don’t be offended by these fake comments, I am just trying to be funny.
  • “Seriously? You wasted all this time analyzing something that was clearly not real?” I am not sure that this is actually a question, but yes — it is true. I could say the same thing about you though. Seriously? You just spent 8 hours playing a videogame? It isn’t even real.
  • “What about the other Star Wars movies? Do the speeds change in those?” Great question. My original plan was to look at all the blaster shots in the three real Star Wars movies. Alas, this data collection took a bit longer than I anticipated.
  • “You must have no life. Why don’t you get out and do something?” This is essentially the same as the first comment.
  • “You actually get paid to waste your time like this?” I am not sure I get actually paid for this actual analysis. But, I really do think this is a worthwhile post. It shows how to take data from something (even if that something is obviously fake) and analyze it.
  • “You said that the Death Star is 160 km in diameter. Actually, the original Death Star plans had it at 180 km diameter but it was changed to 160 km in order to finish on time to destroy the Rebel base on Yavin 4.” OK.
  • “How can you hear the blaster bolts in space?” If you use The Force, you can hear them.
  • “How much energy is in each blaster bolt?” Another great question. You could estimate the volume of a bolt and assume it is gas at a certain temperature. You would have to guess at the density — but that would be one way to get a value for the energy.
  • “I kind of thought you would do more with the uncertainty in the speeds of these bolts.” Me too.
OK. I can’t think of any other preemptive comments.

Wednesday, August 18, 2010

Iran To Unveil An Array Of Weapons Next Week

Published on 08-17-2010 by AFP

Defence Minister Ahmad Vahidi said on Tuesday that Iran will unveil next week an array of weapons, including missiles, speedboats and a long range drone, the ISNA news agency reported.

Two missiles, Qiam (Rising) and the third generation Fateh 110 (Conqueror) would be tested next week when Iran marks the annual government week, Vahidi said in reference to the Iranian week which starts on Saturday.

Iran will also unveil the long-range drone, Karar, he said using the nickname of revered Shiite Imam Ali.

On Sunday Iran launches its annual government week which runs until August 30 and is an occasion to showcase Tehran's achievements.

Iran has previously paraded a version of Fateh 110 which has a travel range of 150 to 200 kilometres (90 to 125 miles), but the range of the surface-to-surface Qiam missile was not reported by ISNA on Tuesday.

Vahidi said production lines of two missile-carrying speedboats, Seraj (Lamp) and Zolfaqar (named after Imam Ali's sword) would also be opened next week.

Vahidi said the unveiling of these weapons indicate that "sanctions have had no impact on us, but made us more experienced and self-sufficient."

Iranian officials regularly boast about the Islamic republic's military capabilities and Vahidi's announcements come at a time when local officials have been warning against any attack on the Islamic republic.

Tehran's archfoes, the United States and Israel have not ruled out a military strike against Iran to stop its controversial nuclear programme.

Last week a top commander from the Revolutionary Guards said Iran will mass produce replicas of the Bladerunner 51, often described as the world's fastest boat, and equip them with weapons to be deployed in the Gulf.

Also on August 8, Iran took delivery of four new mini-submarines of the home-produced Ghadir class. Weighing 120 tonnes, the "stealth" submarines are aimed at operations in shallow waters, notably in the Gulf.