Yuen-Ron Shen (沈元壤) is a professor emeritus of physics at the University of California, Berkeley, known for his work on non-linear optics.
 He was born in Shanghai and graduated from National Taiwan University.
 He received his Ph.D. in Applied Physics from Harvard under physicist and Nobel Laureate Nicolaas Bloembergen in 1963, and joined the department of physics at Berkeley in 1964.
 In the early years, Dr. Shen was probably best known for his work on self-focusing and filament propagation of laser beams in materials.
 These fundamental studies enabled the creation of ultrafast supercontinuum light sources.
 In the 1970s and 1980s, he collaborated with Yuan T. Lee on the study of multiphoton dissociation of molecular clusters.
 The molecular-beam photofragmentation translational spectroscopy that they developed has clarified much of the initial confusion concerning the dynamics of infrared multiphoton dissociation processes.
 In the 1980s and 1990s, Professor Shen developed various nonlinear optics methods for the study of material surfaces and interfaces.
 Among these techniques, second-harmonic generation and sum frequency generation spectroscopy are best known and now widely used by scientists from various fields.
 He has collaborated with Gabor Somorjai on the use of the technique of Sum Frequency Generation Spectroscopy to study catalyst surfaces.
 He is the author of the book "The Principles of Nonlinear Optics".
 Professor Shen belongs to the prolific J. J. Thomson academic lineage tree.
 Currently, Professor Shen works in U. C. Berkeley and Fudan University in Shanghai.
Craig F. Bohren (born 1940) - American atmospheric scientist and physicist.
 Bohren wrote fundamental books on light scattering, atmospheric thermodynamics, and radiative transfer, as well as popular science books on atmospheric optics.
 He is Distinguished Professor Emeritus of Meteorology at Pennsylvania State University.
 He is an author of about 100 articles mostly on atmospheric optics, radiative transfer, and light scattering.
 His first atmospheric radiation teacher was Bruce Barkstrom.
 He is married to Nanette Malott Bohren.
Ortwin Hess (born 1966) is a German-born theoretical physicist at Imperial College London (UK), working in condensed matter optics.
 Bridging condensed matter theory and quantum optics he specialises in nanophotonics, plasmonics, metamaterials and semiconductor laser dynamics.
 Since the late 1980s he has been an author and coauthor of over 300 peer-reviewed articles, the most popular of which, called Trapped rainbow' storage of light in metamaterials", was cited more than 400 times.
 He pioneered active (gain enhanced) nanoplasmonics and metamaterials with quantum gain and in 2014 he introduced the "stopped-light lasing" principle as a novel route to cavity-free (nano-) lasing and localisation of amplified surface plasmon polaritons, giving him an h-index of 33.
Progress in Optics are a series of books edited by Emil Wolf published by Elsevier.
 They consist of collections of already published review articles deemed to be representative of the advances made in the fields of optics.
The International Commission for Optics (ICO) was created in 1947 with the objective to contribute, on an international basis, to the progress and dissemination of the science of optics and photonics and their applications.
 It emphasises the unity of the crossdisciplinary field of optics.
August Hirt (28 April 1898 – 2 June 1945) was an anatomist with Swiss and German nationality who served as a chairman at the Reich University in Strasbourg during World War II.
 He performed experiments with mustard gas on inmates at the Natzweiler-Struthof concentration camp and played a lead role in the murders of 86 people at Natzweiler-Struthof for the Jewish skeleton collection.
 The skeletons of his victims were meant to become specimens at the Institute of anatomy in Strasbourg, but completion of the project was stopped by the progress of the war.
 He was an SS-Hauptsturmführer (captain) and in 1944, an SS-Sturmbannführer (major).
Emil Wolf (born July 30, 1922) is a Czech born American physicist who made advancements in physical optics, including diffraction, coherence properties of optical fields, spectroscopy of partially coherent radiation, and the theory of direct scattering and inverse scattering.
 He is also the author of several works on optics.
Alberto Diaspro was born in Genoa, Italy, on April 7, 1959.
 He received is doctoral degree in electronic engineering from the University of Genoa, Italy, in 1983.
 He is University Professor in applied physics.
 He is Head of the Nanophysics Department of the Italian Institute of Technology - Istituto Italiano di Tecnologia, www.iit.it.
 AD is member of the University advisory Committee for PhD Courses in Biotechnology (University of Genoa) and Medical Nanotechnology (University of Milan).
 AD has collaborations with IFOM - FIRC Oncology Institute, Milan, the Institute of Biophysics of the National Research Council (CNR) and NBT-IIT, Italian Institute of Technology.
 AD founded LAMBS (Laboratory for Advanced Microscopy, Bioimaging and Spectroscopy, www.lambs.it).
 AD is author of more than 170 international ISI publications.
 He is the President of OWLS (Optics With Life Sciences) and ICO (International Commission of Optics) representative.
 AD was the President Elect of EBSA (European Biophysical Societies\\\' Association, www.ebsa.org) and founder of the Biophysical Society Nanoscale Biophysics subgroup, www.biophyscs.org.
 AD is active member of OSA, SPIE, SIF (Italian Physical Society, www.sif.it).
 AD has been invited as speaker to more than 200 international conferences.
 Recently he was the co-organizer of a World Conference on Microscopy, FOM2003, SIF 2008 (Italian Physical Society) and of EBSA 2009 (www.ebsa2009.org).
 He was visiting scientist at Drexel University, Philadelphia, USA, Universidad Autonoma de Madrid, Madrid, Spain, Academy of Sciences of Czech Republic, Polytechnich University of Bucharest, Romania, University of Illinois, Urbana-Champaign, USA.
In South Korea, immigration policy is handled by the immigration services of the Ministry of Justice, Ministry of Labor, Ministry of Health and Welfare and the Ministry of Foreign Affairs and Trade.
 The Nationality Act, Immigration Control Act, Multicultural Families Support Act, and the Framework Act on Treatment of Foreigners are the foundations of immigration policy in Korea.
 The Korean government initiated a discussion in 2003 on establishing an independent immigration office to accommodate fast-growing immigrant and to prepare inclusive and rational immigration policies; however, there has been little progress.
 The Foreigner Policy Committee, headed by the Prime Minister, coordinates foreigner-related policies which were handled by many ministries.
 However, its role is limited because of a shortage of resources and manpower.
 The establishment of an Immigration Office is expected to solve these problems by concentrating all related resources and manpower under one umbrella.
The International Order of Freemasonry "Le Droit Humain" is a global Masonic Order, membership of which is available to men and women on equal terms, regardless of nationality, religion or ethnicity.
 The Order is founded on the ancient teachings and traditions of Freemasonry, using Masonic ritual and symbolism as its tools in the search for truth.
 On the individual level, the Order aims "to promote the progress of individual worth, without the imposition of dogma, or exacting the abandonment of cultural or religious ideas".
 On a collective level it works "to unite men and women who agree on a humanist spirituality whilst respecting individual and cultural differences".

Question: What is the nationality of the author of Progress in Optics?
Answer: American