# Tag Info

9

The basic problem is that you haven't defined what a "good" kick or punch is. Is the purpose make the opponent lose his balance? To inflict the maximum pain? To break bones? To hit a particular part of the body to disable him? Shatter the most wooden boards stacked on top of each other? Something else? Each of these different outcomes will weigh ...

5

It's fairly complicated. I found an article in The Bone Journal Comparison of three-point bending test and peripheral quantitative computed tomography analysis in the evaluation of the strength of mouse femur and tibia where they used tomogrphy to calculate inertia. However if you don't have CT you can try the hard way. You'll have to calculate bending ...

5

Short: (1.) Mindless and without understanding method that would work well. This is as quick and easy as is likely to be possible, should work 'well enough' and would be 'easy enough' to implement without any in depth understanding past ensuring that simulated sensor output characteristics (impedance etc) match those of the target sensor. Obtain known ...

5

Production rates of lab-on-chip fluidic devices can exceed the production rate of silicon ICs easily. Some types of lab-on-chip devices can be fabricated via injection molding. Of course, there are subsequent operations: assembly, QC. But those can be automated. I'm aware of a device that's already being produced at a rate of 5 million units a year. ...

4

It all comes down to force. We all know Newton's second law: $\vec{F}=m\vec{a}$1. It says that the greater the force that is applied to an object, the greater its acceleration will be (and acceleration is really just the second derivative of position with respect to time). How do you measure force? One common method, used to measure the weight of an object,...

4

Chronic animal experiment. This is not the only stage of evaluation of the material, but it's a mandatory stage. Chronic means that the animal is survived after implantation for a period of time and observed. Afterwards, the animal is sacrificed and autopsied. Humans have a strong immune system, compared to other animals. So, you would want to use an ...

4

The first clue is in your reference to the succinct description: You may need a large cuff if your arm size is 11 or 12 inches. By 13 inches you do need a large cuff. The brachial artery is protected by the muscles and fat in the upper arm. The larger the girth of the upper arm the thicker the muscles and fat protecting the artery. Any pressure ...

3

I really have no idea, but I did come up with the following possibilities. To minimize reflections from the instrument itself. Light reflecting off the endoscope could interfere with the doctor's view. Because little (if any) body tissue inside the body is black, thus making it easier to distinguish the instrument from body parts. Because that's the ...

3

I think you could hack any poppet valve engine block to create a rapid pressure swing adsorbtion machine, but better to start with a block designed as a compressor in the first place. Lubricating oil sequestering would be an issue. Most people don't really understand the relationship between manufacturing, logistics, and assembly. They probably think they ...

3

I would guess that there is more than one reason to that (However, I am speculating, since I could not find any technical research on it). But in general the question is what effects can lead to a change in “pressure-reading”: In order to compress the artery in a way, that the blood flow is stopped the arm needs to be compressed as well. For simplicity one ...

3

The endoscope has pairs of cords running along the length, which are called angulation wires. The levers on the operator end pull the cords differentially, which makes the tip turn. ( Source; the article pretty much answers the original question. ) ( Source. ) ( Source. )

2

This is actually a really neat question, and it involves a few engineering and anatomical concepts. Here's what happens when an automatic blood pressure cuff measures your blood pressure: The cuff inflates until it reaches a pressure just above systolic pressure (the maximum pressure your blood reaches during a heartbeat). When it reaches this pressure, ...

2

It sounds like you need a Diaphraghm pump. These are self-priming, like solenoid pumps, and come in a wide range of sizes. How far above the water is the highest point in your system compared to the jug? And what volume flow rate do you require?

2

One possible way to do this could be a microbial fuel cell. This has, apparently, been tested ex-vivo: A pacemaker powered by an implantable biofuel cell operating under conditions mimicking the human blood circulatory system - battery not included Another approach, which also works at least ex-vivo, is called Abiotic Biofuel Cell: Pacemaker Activated by ...

1

A medical device known as an incentive inspirometer measures volume of air inhaled. Twenty years ago, I could pull five liters (was serious cyclist) but now I'm down to four liters per breath. Sixteen breaths per minute means sixty-four liters per minute. At the five liter value, that's eighty liters per minute, in resting state.

1

Automotive manufacturing encompasses a wide range of types of devices, many of which are broadly similar in terms of their structure and function to medical devices. e.g. processing electronics, actuators, sensors, feedback displays. They are also reasonably similar in the size of devices they make - this sort-of makes sense from an abstract perspective, as ...

1

Generally speaking, any mathematical model that is time dependent will be considered a 'dynamic' system, some engineering descriptions will say dynamic systems are described as systems having the ability to store and release energy. From Wiki In mathematics, a dynamical system is a system in which a function describes the time dependence of a point in a ...

1

I have found the solution! I did these three steps and everything is ok now! 1) I restored my system through: start/create a restore point/ system protection/ system restore/next/next... 2) I work with visual studio 2019 and I have two kind of libraries: v14 and v15, so I add both directories into the libraries direction 3) copy my code to new project!! ...

1

It is difficult to tease out proprietary trade secrets from manufacturing companies; and it is further confusing to deal with misleading terms aimed at applications and clinical handling of these products. The main hurdle in understanding what's going on under the hood in these algorithms is the label "statistical algorithms" for hybrid systems. It ...

1

The accepted error in pulse oximtery isn't that good. It's about $\pm$2 % so your additional significant figures are useless. A good review is Aoyagi, T. J Anesth (2003) 17: 259. https://doi.org/10.1007/s00540-003-0192-6

1

You can use a float type flowmeter: A float sits in a conically expanding tube, the higher the flow rate the higher the float hovers. In the closest catalog I have at hand, the smallest meter is for flow rates in 0.2 m³/h - 2.5 m³/h range (gas applications).

1

When I was a boy; We made a eight shapes ( as I remember) of parts like that for Ritter. They were produced by investment casting using 17 - 4 PH. There was a die witness line that carried over from the plastic pattern; it was polished away during tumble polishing. Medical equipment also uses 440 A, B and C for cutting tools. Vitalium may still have some use ...

1

I happen to be a cancer patient and have had the PET-CT. The way they explained it to me is after giving you a rapidly decaying radioactive sugar with a half-life of about one hour which has one carbon switched with fluoride. Then the hungry cancer cells break the sugar, positrons are released which in a deadly collision with electrons release two gamma ...

1

Why not simply record back angle wrt vertical axis in your data then state your assumption that you base your analysis on. Then, the results can be analysed both ways.

1

Well, rather obviously you need to find an optics house which will take on the task of regrinding the ends to optical flatness while maintaining perpendicularity of the faces to the long axis. Cleaning the barrel is easier, assuming there aren't any nicks or cracks. If the latter, it's more than likely that the rod will not survive much longer in any case ...

1

You need to be careful with the subscripts, e.g in the equation for $\sigma$, which $R$ do you want? However, what you seem to be saying is: $$E \propto \frac{p}{R}$$ and, if you take $p$ and $R$ as increments from initial values, that seems reasonable. Getting the constant of proportionality might be problematic.

1

One very easy solution is to spray the required surfaces with latex based contact adhesive. This is fairly tacky when cured and the spray will also give a bit of texture. Alternatively liquid latex is cheap and easily available and can be applied by dipping the fingertips and/or palm into it. Without fillers or vulcanisation it is not as durable as some ...

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Measuring the resistance of a person's abdomen will not be a good method to determine their girth because the resistivity varies by more than two orders of magnitude. According to the Wikipedia article on electric shock: The NIOSH states "Under dry conditions, the resistance offered by the human body may be as high as 100,000 Ohms. Wet or broken skin may ...

1

A martial artist's live strikes can be quantified between practitioners using force applied as pounds per square inch. The basic premise is (of course) force equals mass times acceleration. The importance is pairing with the area of contact used with which it is delivered - inverse square law. These two are the main pair. There are of course wild ...

1

With a strike or kick, you move (more or less) you whole body, connect a hand or foot or whatnot to your target and if your technique is good, the target will deform far more than your body. I think this thought is crucial, as there are a lot of joints and squishy things between the part of your body hitting the target and your center of mass. This also ...

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