Question: Are The Mosuo Sisters and Through a Blue Lens both documentary films?

Through a Blue Lens is a documentary film produced by the National Film Board of Canada.  The film follows interactions between police officers and drug addicts and documents the extreme poverty and suffering many addicts endure. <SEP> Low-energy electron microscopy, or LEEM, is an analytical surface science technique invented by Ernst Bauer in 1962, however, not fully developed (by Ernst Bauer and Wolfgang Telieps) until 1985.  LEEM is a technique used by surface scientists to image atomically clean surfaces, atom-surface interactions, and thin (crystalline) films.  In LEEM, high-energy electrons (15-20 keV) are emitted from an electron gun, focused using a set of condenser optics, and sent through a magnetic beam deflector (usually 60˚ or 90˚).  The “fast” electrons travel through an objective lens and begin decelerating to low energies (1-100 eV) near the sample surface because the sample is held at a potential near that of the gun.  The low-energy electrons are now termed “surface-sensitive” and the near-surface sampling depth can be varied by tuning the energy of the incident electrons (difference between the sample and gun potentials minus the work functions of the sample and system).  The low-energy elastically backscattered electrons travel back through the objective lens, reaccelerate to the gun voltage (because the objective lens is grounded), and pass through the beam separator again.  However, now the electrons travel away from the condenser optics and into the projector lenses.  Imaging of the back focal plane of the objective lens into the object plane of the projector lens (using an intermediate lens) produces a diffraction pattern (low-energy electron diffraction, LEED) at the imaging plane and recorded in a number of different ways.  The intensity distribution of the diffraction pattern will depend on the periodicity at the sample surface and is a direct result of the wave nature of the electrons.  One can produce individual images of the diffraction pattern spot intensities by turning off the intermediate lens and inserting a contrast aperture in the back focal plane of the objective lens (or, in state-of-the-art instruments, in the center of the separator, as chosen by the excitation of the objective lens), thus allowing for real-time observations of dynamic processes at surfaces.  Such phenomena include (but are not limited to): tomography, phase transitions, adsorption, reaction, segregation, thin film growth, etching, strain relief, sublimation, and magnetic microstructure.  These investigations are only possible because of the accessibility of the sample; allowing for a wide variety of in situ studies over a wide temperature range. <SEP> Yair Qedar (Hebrew: יאיר קדר‎ ‎ , born June 13, 1969) is an Israeli filmmaker and a civil-rights activist.His academic training on 20th-century Hebrew literature (Tel Aviv University), propelled him into to The Hebrews — a trans media project on the Hebrew literary canon, centered on filmic portraits of the Hebrew writers.  Eight documentary films were made in this framwork and six others are currently shot.  The documentary films which he produced, wrote and directed are —"Bialik - King of the Jews", "The 5 Houses of Lea Goldberg" and "The Seven Tapes of Yona Wallach", 'the Awakener - the story of Y.H Brener' and 'Simple Woman -Zelda'— as well as the three films which he produced in the project - "Song of loves, Rabbi David Bouzaglo", "the Raven, Zeev Jabotinki" and "Mrs Rachel Bluestein" – aired on Israeli TV, circulated far and wide in cinematheques, community and cultural centers, in Israel and around the world (USA and Canada, Europe, Australia and Russia) earning 10 awards (2016: first prize for filmmaking in the field of Jewish culture by the ministry of Education in Israel, 2015: the "Hebrews" films won the prize for best television project in the Israeli Documentary competition).  The project, both digital and print, offers altogether eight documentary films, a video archive and several books. <SEP>  It chronicles the lives of two sisters, Jua Ma and La Tsuo, who are members of one of the last matriarchal societies, the Mosuo tribe. The Mosuo Sisters is a 2012 documentary film written and directed by Marlo Poras.  Being an ethnic minority in China, the film explores their journey from working at a bar in Beijing to moving back home to their village in the Himalayas, dealing with the modern world impinging upon the traditional Mosuo culture and way of life.