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Many clinical diagnoses depend on the electronic equipment to detect and treat the diseases from basic illness to fatal diseases or injuries. But, most of the diagnosis techniques are invasive and cause pain or uncomfortable issues to the patients. However, the non-invasive methods, like breath exhale testing which is completely painless. In this work, we report a preliminary study of simple and compact wireless smartphone based sensing device. This device was fabricated to detect the ammonia vapor in the human exhaled breath towards diagnosing renal disease. The sensing performance of the device was tested in laboratory conditions and the obtained results are as follows. The developed device exhibited good sensing response of 584 % with response and recovery time in the order of seconds towards 50 ppm for ammonia vapor. Furthermore, ammonia sensitivity and selectivity tests are carried out for the developed breath analyzer device and the results are reported.

We derive improved stellar luminosity limits on a generic light CP-even scalar field \\(S\\) mixing with the Standard Model (SM) Higgs boson from the supernova SN1987A, the Sun, red giants (RGs) and white dwarfs (WDs). For the first time, we include the geometric effects for the decay and absorption of \\(S\\) particles in the stellar interior. For SN1987A and the Sun, we also take into account the detailed stellar profiles. We find that a broad range of the scalar mass and mixing angle can be excluded by our updated astrophysical constraints. For instance, SN1987A excludes \\(1.010^-7 3.0 10^-5\\) and scalar mass up to 219 MeV, which covers the cosmological blind spot with a high reheating temperature. The updated solar limit excludes the mixing angle in the range of \\(1.5 10^-12 < < 1\\), with scalar mass up to 45 keV. The RG and WD limits are updated to \\(5.3 10^-13 < < 0.39\\) and \\(2.8 10^-18 < < 1.8 10^-4\\), with scalar mass up to 392 keV and 290 keV, respectively.