Results 1 to 10 of about 165,390 (253)

Capturing coherent pseudorotation through conical intersection in photoionized benzene [PDF]

Nature Communications
Vibronic coupling and coherence are crucial in the charge and energy transfer of photoexcited molecules. Here we investigate the coupled electron-nuclear dynamics of the photoionized benzene molecule using the time-resolved Coulomb-explosion imaging ...
Zejin Liu, Ming Zhang, Tianyu Zhou, Xiaokai Li, Shengpeng Zhou, Lu Wu, Yizhang Yang, Jiaqi Zhou, Lanhai He, Dongdong Zhang, Xueguang Ren, Alexander I. Kuleff, Oriol Vendrell, Kiyoshi Ueda, Zheng Li, Dajun Ding, Chuncheng Wang   +16 more
doaj   +2 more sources

Skin cancer screening – better safe than sorry [PDF]

SHS Web of Conferences, 2020
Skin cancer is the most common type of cancers. In Latvia, on average there are approximately 200 new melanoma and 1300 non-melanoma cancer cases per year. Non-melanoma cancers are: Basal Cell Carcinoma, Squamous Cell Carcinoma and others.
Lange Marta, Plorina Emilija Vija, Lihacova Ilze, Derjabo Aleksandrs, Spigulis Janis   +4 more
doaj   +1 more source

High-Sensitivity Whispering Gallery Mode Humidity Sensor Based on Glycerol Microdroplet Volumetric Expansion

Sensors, 2021
We demonstrate a highly sensitive whispering gallery mode (WGM) relative humidity (RH) sensor based on a glycerol microdroplet. WGMs were excited using a 760 nm tunable semiconductor laser.
Pauls Kristaps Reinis, Lase Milgrave, Kristians Draguns, Inga Brice, Janis Alnis, Aigars Atvars   +5 more
doaj   +1 more source

Wavelength Sensing Based on Whispering Gallery Mode Mapping

Fibers, 2022
We demonstrate a wavelength sensor based on whispering gallery mode (WGM) resonators. For the first time, multiple polymethyl methacrylate (PMMA) microspheres were simultaneously attached to a tapered fiber.
Roberts Berkis, Pauls Kristaps Reinis, Lase Milgrave, Kristians Draguns, Toms Salgals, Inga Brice, Janis Alnis, Aigars Atvars   +7 more
doaj   +1 more source

Whispering Gallery Mode Resonator Temperature Compensation and Refractive Index Sensing in Glucose Droplets

Sensors, 2021
Among the different types of photonic sensor devices, optical whispering gallery mode resonators (WGMRs) have attracted interest due to their high level of sensitivity, small size, and ability to perform real-time temperature measurements.
Inga Brice, Karlis Grundsteins, Kristians Draguns, Aigars Atvars, Janis Alnis   +4 more
doaj   +1 more source

Spectral Line Reflectance and Fluorescence Imaging Device for Skin Diagnostics

Applied Sciences, 2020
The multi-spectral-line imaging concept, which was recently implemented for the snapshot mapping of three main skin chromophores—melanin, oxy-hemoglobin, and deoxy-hemoglobin, is further explored for the snapshot capturing of four spectral line images at
Janis Spigulis, Zigmars Rupenheits, Uldis Rubins, Madars Mileiko, Ilze Oshina   +4 more
doaj   +1 more source

SkImager: a concept device for in-vivo skin assessment by multimodal imaging; pp. 301–308 [PDF]

Proceedings of the Estonian Academy of Sciences, 2014
A compact prototype device for diagnostic imaging of skin has been developed and tested. Polarized LED light at several spectral regions is used for illumination, and round skin spot of diameter 34 mm or 11 mm is imaged by a CMOS sensor via cross ...
Janis Spigulis, Uldis Rubins, Edgars Kviesis-Kipge, Oskars Rubenis   +3 more
doaj   +1 more source

Shadow Detection and Compensation from Remote Sensing Images under Complex Urban Conditions

Remote Sensing, 2021
Due to the block of high-rise objects and the influence of the sun’s altitude and azimuth, shadows are inevitably formed in remote sensing images particularly in urban areas, which causes missing information in the shadow region.
Tingting Zhou, Haoyang Fu, Chenglin Sun, Shenghan Wang   +3 more
doaj   +1 more source

Object-Based Shadow Index via Illumination Intensity from High Resolution Satellite Images over Urban Areas

Sensors, 2020
For multi-spectral remote sensing imagery, accurate shadow extraction is of great significance for overcoming the information loss caused by high buildings and the solar incidence angle in urban remote sensing.
Haoyang Fu, Tingting Zhou, Chenglin Sun
doaj   +1 more source

Time of flight for photon in human skin

Journal of Biomedical Photonics & Engineering, 2016
The time of flight for photons in human skin was measured using picosecond diode laser. Two different wavelength lasers were used - 405 nm and 510 nm. A difference for time of flight in normal skin and in nevus was observed as well as a difference for ...
Antra Dzerve, Inesa Ferulova, Alexey Lihachev, Janis Spigulis   +3 more
doaj   +1 more source