Our skin is very sensitive, changes on situations and environment conditions. Every person in our world like to have very beautiful soft skin, most of them are girls, of course!
Have you ever think about measure or comparison of our skin? suck like there any devices or instruments or soft-wares available to check out our skin softness !
Since now we do not heard such things, also this things are not available in market or everywhere, in fact we do not know about it exit in our world . On other hand measurement of our skin color is quite simple, we easily evaluate difference between black or white !!
Our skin is made of some superficial layers, according to science it would be possible to measure softness of our skin but not in a simple manner. Let me give you some examples..
First think is that,there is no such technique which gives you result directly and in easy manner. According to ASME (The American Society of Mechanical Engineering), the device called Indentation Devices Imitating Palpation, this device work on Herts contact theory, to evaluate indentations of thin tissues. The measurement result and concept is elasticity of human skin. You can see the full report of this topic of skin at ASME website.
According to NCBT, piezoelectric tactile sensor and load cell could measure softness.
We measure some physical or non-physical quantity by the mean of some output results. This output results express in some units. For example we usually measure length in millimeter or meter or kilometer.
But in a standard manner, every individual type of measurement express in unique fundamental unit. According to SI standard,we have seven basic fundamental units of seven basic measurement type. This type is expressed follows
1. Mass –
The basic fundamental unit of mass is “Kg”. We also measure mass in Gram, Pound, Metric ton, Stone, Micro gram, Carat etc. Some basic relation between units are
Relation between Units of Mass
1 centigrams (cg)
10 milligrams (mg)
1 decigrams (dg)
1 gram (g)
1 dekagrams (dag)
1 hectogram (hg)
1 kilogram (kg)
2. Time –
The basic fundamental unit of Time is “Sec(s)”. We also express time in seconds, minutes, hours, days, weeks,years etc. Some basic relation between units are
Relation between Units of Time
60 minutes or 3600 seconds
24 Hours or 86,400 seconds
7 days, or 604,800 seconds
3. Electric Current –
The basic fundamental unit of Electric Current is “Ampere(A)”. Some basic Electrical & electronic units are –
Electrical & Electronic Units
Electric current (I)
Electric power (P)
4. Amount of Substance –
Amount of Substance is a dimensionless expression of the number of particles in a particle or object. The basic fundamental unit of Amount of Substance is “Mole”. Amount of substance all called material quantity.
The SI unit of Illumination is “Candela”. Candela is denoted by symbol ‘cd’. Some other units is lux, lumen etc.
The SI unit of Distance is “Meter”. Distance also measure in mm, cm, km, yard,inch, foot,feet etc. The relation between Units of Distance is listed below
Relation between Units of Distance
100 centimeters or 1,000 millimeters
2.54 centimeters or 25.4 millimeters
30.48 centimeters or 12 inches
0.91 meters or 3 feet
The SI unit of temperature is “kelvin”, expressed as word “K”.The temperature 0 K is known as “absolute zero.”
We use two types of scale in measuring temperature that is –
1.Relative scales [Fahrenheit (°F) and Celsius (°C)]
2. Absolute scales [Rankine (°R) and Kelvin (K)].
The relation between above two is described by follow relations –