Scanner Definition and 31 Threads

I know there are some stationary 3d scanners like this, but they are really expensive. When I saw, well an addition to handheld 3d scanner - a robotic hand, I came up with an Idea that same can be done with a simple camera, and photogrammetry. Found a nice article about photogrammetry on the...

Hello, I am making a DIY UV-C germicidal box as part of my defense-in-depth strategy for protecting my household but I am having trouble determining whether a particular plate of glass that I have will be transparent to UV in the 250-280nm range. The glass in question is from a flatbed scanner...

So in the class TJTwitter, I have the following defined: private Twitter twitter; private PrintStream consolePrint; private List<Status> statuses; private List<String> terms; private String popularWord; private int frequencyMax; and in the same class, I have a few methods that are meant to...

My school recently got an industrial robot arm with a precision turntable. I was thinking how to use this with some cameras/lasers to make a 3d scanner. Where would you folks recommend I start looking?

I have a need for a hand-held scanner to be able to read a MAC ID displayed on a monitor. The MAC IDs are sent to my application via a network, and I need to automatically read each MAC ID into a different application. For various reasons (Linux versus Windows applications running on different...

I recently had an MRI scan, and while I was inside I began thinking about how the thing actually worked, and what it would cost to build. The hospital staff told me that the cost was several million dollars, and subsequent research seems to confirm that the 'average' MRI scanner cost between 3-5...

I have seen that in many cases, teachers and authors prefer Scanner to BufferedReader for taking input from the user through keyboard. I have found two reasons for this: 1. Scanner class manages exceptions implicitly, while for BufferedReader, exceptions have to be handled either by try..catch...

So I've stumbled upon a really cool opportunity this summer, where I basically have a hospital which has agreed to let me do an experiment using their 3T MRI machine. I'm a physics undergrad and I want to do a physics experiment using the MRI, but I have absolutely no idea what to do. I've tried...

Hello everyone! Maybe someone good at this topic or met this problem before, because I was really confused reading about this << Link deleted by Mentors as Spam >> Can someone tell me: does it actually work? And how terahertz radiation can influence on the human body, considering that THz waves...

Hello, excuse me if these happen to be basic questions, but I'm a psychologist/neuroscientist in training without any particular experience in physics, and I am just confronted with a very specific problem. I need to measure the sound pressure experienced inside of an MRI scanner...

Homework Statement If the relative noise (noise divided by signal) in a region of a CT slice is measured to be N what would be the value if the tube current was halved, the pitch increased from 0.9 to 1.2, the rotation time increased from 0.75s to 1s and the slice width increased from 1mm to...

Here is an idea I had for a way to deduce the internal structure of an organic object using it's natural radioactivity. The set-up is an array of gamma ray detectors located circularly around the object. By detecting both the position and direction of the gamma rays (obviously impossible to get...

Greetings PFers, Can someone help explain to me the difficulties of designing a device which utilizes static electric fields to map an objects’ internals and externals? My understanding is that as a electric field propagates through matter, it encounters absorption. I envision a device...

Hi, i have been working on this problem for a while. i just need some guidance. the question is: design a ztube scanner suitable for displacing ±1 micron displacement at 200V. i am using this equation: ΔL=([d]_{}[/31]×V×L)/t ΔL=(d31 ×L×V)/t ΔL=change in length = 1micron...

Hello, I am not sure where I should be posting this, so if this is the wrong section, can a moderator please move it? Right. I have become rather fascinated with the worlds technology and physics. Now, if you've ever heard of lucid dreaming and I'm sure many of you have. I lucid dream...

If we had an array of detectors in an orbit around the sun could we magnify the image of distant star systems. Would this help to detect planets using this magnification?

There are (at least) two issues regarding the presence of ferromagnetic materials around an MRI scanner (of strength e.g. 3 Tesla). (i) that something (e.g. scissors in a health worker's pocket) becomes a projectile, and (ii) that an implant may experience a twisting force (e.g. ferromagnetic...

suppose Team Red wants to make RFID tags that only their own "authorized" scanners can pick up, such as for tagging merchandise in Walmart. Meanwhile Team Blue wants to be able to find any Team Red tags on items or prove that they are not there. They don't need to extract any info from the tags...

Homework Statement Suppose that an STM scans a surface at a distance of a=1.000nm. Take the height of the potential barrier to be U°-E=2.00 eV. If the STM tip movies away from the surface by 2.00%, estimate the percentage change in the tunneling current. Homework Equations The...

Homework Statement I am currently working on making a fingerprint scanner, by using frustrated total internal reflection of an infrared LED, with an image taken with a webcam. This setup is fully working and gives a reasonably sharp image.. however now i need to try to make a small program...

Anyone know the radiation levels that are output by the full body airport scanners? I am not looking for a relative amount, but a quantitive amount. If you do not know, please don't answer.

I am having some trouble with the Java Scanner to read input from the keyboard. I am trying to keep my input cleaned up and secure, so I am checking for the right type and value, and clearing the input buffer if it isn't. I also restart the prompt loop if it isn't right, so they can try again...

Anyone familiar with BarCode scanners? I have four of them I want use with my app. Can a console (custom) app be used to load/save scanned data?

What I want to do is pass in a string to read_integer (a function which will parse the string character by character, convert the characters into ints (c - '0'), store it into a struct, and return a pointer to that struct. The string is guaranteed not to be over 200 digits.). I'm not sure how to...

Hi all, I've been trying to figure out how I can use the Scanner class in Java to pause my program and wait for the user to hit the return key. What I have now looks like this: Scanner kbd = new Scanner(System.in); kbd.next(); ... The thing is, the rest of my program won't run unless there...

I don't know how to describe this properly in a few words, hence the awkward thread title. I used to own this particular program which is able to decipher words in picture files to actual text which can then be copied to MS word or other word processors. It doesn't require a scanner but it...

Hi, I'm trying to create this output: Input team 1's name: Team 1 Input team 1's ranking: 90.4 etc. For 8 teams. This is what I have: import java.util.Scanner; public class Tournament { public static void main(String args[]) { System.out.println("Input team 1's name:")...

Java's "Scanner" Hello, I own a Macintosh and was trying to write a simple Java program for one of my classes. However, I quickly discovered that it appeared that the Mac does not have the Scanner ability. I get an error on the "import java.util.Scanner" line saying "cannot find symbol...

if i put my hand on the scanner and scan my hand, do u think the strong light will harm my hand? because i really want to scan my hand, but i don't know whether it is harmful.

i had a problem earlier that russ,zantra and greg helped me out of, basicaly the program that drives my scanner had bits missing, as i NEVER load anything on my computer, apart from the os or download from the net, apart from saving certain items to MY DOCUMENTS, how can this happen? my...

How does a scanner work?