Editing Final Report/Thesis 2016 (section)

==== Data comparison figures ====
All of the quartz data is recorded. In order to comparison, the data of element has been classified as four sets of data: 
•	Control sample hairs: Files name are Hair02-Hair08. For control hairs, it analyzed 2 sections of each hair, each 500um in length, so there are 0.7 centimeters control sample in total. The number of samples is seven, and each person takes two hairs as the two samples.
•	Somerton Man: It analyzed 500um sections, each subsequent transect beginning where the previous finished for a total of 96 sections (4.8cm total).
•	Standards: The files named NIST612-1 to NIST612-20 (20 transects) are standards and were run to ensure that the instrument wasn’t grifting too much during the analysis, they can be used to compensate for the drift if need be as they were run at intervals during the sample acquisition. 
•	Background: Transits of 100um lengths across the quartz, files are Glue -1 to Glue–4.
For the quartz test data, each element needs to plot three comparison figures. The first comparison is the comparison of four sets of data which are control samples, Somerthon man, quartz and standards. The second one is enlarged graph for the first comparison figure. The third figure shown fourteen control samples’ hair data comparison.
Using the different colour dots to represent the four sets of data. Blue dots represent control samples, red dots represent Somerton man, yellow dots represent standards and green dots represent quartz background. The Figures (13-19) show the comparison of four sets of data. The X axis for all of the figures describes the scan times of the laser. The Y axis represents the relative value of elements in four sets of data. 
[[File:code14.png|thumb|500px|center|Figure 13a Silver (Ag107) ]]
[[File:code15.png|thumb|500px|center|Figure 13b Silver (Ag107) ]]
[[File:code16.png|thumb|500px|center|Figure 13c Silver (Ag107) ]]
The comparison result of silver (Ag107) value between four sets of data is shown in Figure 8. Yellow dots represent the drift values which are basically stable and indicate that the drift change is not significant. Thus, the recorded data is reliable. Green dots represent the silver content in quartz. As can be seen from the figure, the content of silver in the quartz is very small. Therefore, this set of data has little effect on the test data. In general, the silver element content in Somerton man’s hair is higher than the control hairs. In quartz experiment, the relative content value of silver in the hair is a table value and it is similar with the glass experiment result. 
Figure 14 Carbon (C13)
[[File:code17.png|thumb|500px|center|Figure 14a Carbon (C13) ]]
[[File:code18.png|thumb|500px|center|Figure 14b Carbon (C13) ]]
[[File:code19.png|thumb|500px|center|Figure 14c Carbon (C13) ]]
Figure 15 Sulphur (S34)
[[File:code20.png|thumb|500px|center|Figure 15a Sulphur (S34) ]]
[[File:code21.png|thumb|500px|center|Figure 15b Sulphur (S34) ]]
[[File:code22.png|thumb|500px|center|Figure 15c Sulphur (S34) ]]
Same as silver, the standard values for sulphur and carbon are constant which means the instrument wasn’t drifting too much. By comparison, the carbon and sulphur relative values are similar among Somerton man and 12 control hairs. Only two samples have significant differences and these samples come from one special person. Carbon and sulphur are essential elements in human hair. The change in the content of these two elements can be a direct indicator of a person's living environment. Based on the comparison results of the Figure 9 and 10, the living environment conditions for Somerton man and six control samples are similar but different from the special one. Thus, the living environment of Somerton man can be confirmed.
Figure 16 Calcium (Ca43)
[[File:code23.png|thumb|500px|center|Figure 16 Calcium (Ca43) ]]
Figure 17 Potassium (K39)
[[File:code24.png|thumb|500px|center|Figure 17 Potassium (K39) ]]
Figure 18 Strontium (Sr88)
[[File:code25.png|thumb|500px|center|Figure 18 Strontium (Sr88) ]]
Compared with the elements relative values between Somerton man and control samples, Figure 11, 12, and 13 have some similarities. The relative values of calcium, potassium and strontium in Somerton man’ hair are higher than most control hairs. However, the content of these three elements in two samples is close to the content of Somerton man’ hair. Moreover, these two hair samples both are from the one person. Based this result, it can be speculated that the content values of these three elements in the living environment for Somerton man and this special sample are similar. 
Figure 19 Lead (Pb206)
[[File:code26.png|thumb|500px|center|Figure 19a Lead (Pb206) ]]
[[File:code27.png|thumb|500px|center|Figure 19b Lead (Pb206) ]]
[[File:code28.png|thumb|500px|center|Figure 19c Lead (Pb206) ]]
It has mentioned in the previous chapter that lead is a toxic element, and the data obtained from the glass plate experiment show that the lead content in Somerton man’s hair is significantly higher than that in control hairs. This phenomenon still exists in the quartz plate test. Since the incomplete hair for quartz plate test, the trend of lead content value in the hair before Somerton man dying cannot be expressed. However, the content of lead in Somerton man’s hair is indeed higher than the control hairs.
The difference in lead levels does not indicate that the death of Somerton man is caused by the high level of lead in the body. The difference may be due to the fact that the lead content in human living environment is different from 60 years ago. 
Figure 20 Comparison of the relative values of some elements in control hairs
[[File:code29.png|thumb|500px|center|Figure 20a Comparison of the relative values of some elements in control hairs ]]
[[File:code30.png|thumb|500px|center|Figure 20b Comparison of the relative values of some elements in control hairs ]]
For control hairs, two sections of each hair have been analysed. There are fourteen control hairs which are from seven persons. By comparing these 14 samples, it was found that there was a difference in the elemental content between the samples, especially the first control person’s hair. Figure 15 shows the relative value of the first sample is significantly higher than the other samples. These elements are Mg, Ca, K, Mn, Na, Li, Sr. In addition, by the analysis and comparison results of several previous graphs, the values of the elemental contents of this sample are similar to those of Somerton man. From this result it can be inferred that this control sample and Somerton man have similarities in the living environment or lifestyles.