Essays about: "Extinction coefficient"

Showing result 1 - 5 of 16 essays containing the words Extinction coefficient.

1. 1. Analysis of relatedness and genetic diversity in Swedish sheep breeds using medium density (50K) SNP data

   University essay from SLU/Dept. of Animal Breeding and Genetics

   Author : Krishani Devika Wijesinghe Sinhalage; [2023]
   Keywords : sheep; genetic diversity; population structure; inbreeding; runs of homozygosity; coat colour; MC1R;

   Abstract : The local Swedish sheep breeds belong to a group of sheep breeds known as North European short-tailed sheep breeds. Evaluation of genetic diversity, relatedness, and population structure of local breeds offers crucial metrics to prevent inbreeding depression, genetic erosion, and crossbreeding between locally adapted and exotic sheep breeds since these occurrences can have detrimental effects and ultimately lead to extinction. READ MORE

3. 2. Approximating Quasistationary Distributions Using Deep Learning

   University essay from KTH/Matematisk statistik

   Author : Björn Wehlin; [2022]
   Keywords : Applied Mathematics; Deep Learning; Probability Theory; Stochastic Processes; Ito Diffusions; Quasistationary Distributions; Tillämpad matematik; djupinlärning; sannolikhetsteori; stokastiska processer; Ito-diffusioner; kvasistationära fördelningar;

   Abstract : We study a class of It\={o} diffusion processes on domains with smooth boundary, at which the process is killed. Such a process, when conditioned on non-extinction, gives rise to a stationary state known as a \emph{quasistationary distribution} (QSD). READ MORE

4. 3. Visibility in Smoke With Different Extinction Coefficients

   University essay from Lunds universitet/Avdelningen för Brandteknik

   Author : Lea Elhokayem; [2022]
   Keywords : Visibility; smoke; exit sign; extinction coefficient; visibility constant; evacuation; Technology and Engineering;

   Abstract : Visibility in smoke has since the 1970s gained some attention, mostly after Tadahisa Jin ran the experiments which helped him develop todays widely used visibility equation. By showing that visibility can be assumed to be inversely proportional to the extinction coefficient by a visibility constant (equal to 8 for light emitting sign and 3 for light reflecting), Jin opened up new doors for researchers who were testing out his theory by going around experimenting in different ways and also by showing that there is way for more research to be done. READ MORE

5. 4. Atmospheric Attenuation for Lidar Systems in Adverse Weather Conditions

   University essay from Umeå universitet/Institutionen för fysik

   Author : Johan Viklund; [2021]
   Keywords : Lidar; Lidar equation; Extinction coefficient; Signal attenuation;

   Abstract : In this study, the weather impact on lidar signals has been researched. A lidar system was placed with a target at approximately 90 m and has together with a weather station collected data for about a year before this study. READ MORE

6. 5. Characterizing optical and electrical properties of monolayer MoS2 by backside absorbing layer microscopy

   University essay from Uppsala universitet/Institutionen för fysik och astronomi

   Author : Nathan Ullberg; [2020]
   Keywords : backside absorbing layer microscopy; BALM; monolayer MoS2; TMD; TMDC; 2D materials; nanomaterials; nanotechnology; refractive index; extinction coefficient; absorption coefficient; field-effect transistor; FET; semiconductors; optoelectronics; optics; raw image processing; chemical vapor deposition; CVD; in situ characterization;

   Abstract : Nanomaterials are playing an increasing role in novel technologies, and it is important to develop optical methods to characterize them in situ.  To that end, backside absorbing layer microscopy (BALM) has emerged as a powerful tool, being capable to resolve sub-nanometer height profiles, with video-rate acquisition speeds and a suitable geometry to couple live experiments. READ MORE