Wilhelm Cauer (24 June 1900 – 22 April 1945) was a German mathematician and scientist.
 He is most noted for his work on the analysis and synthesis of electrical filters and his work marked the beginning of the field of network synthesis.
 Prior to his work, electronic filter design used techniques which accurately predicted filter behaviour only under unrealistic conditions.
 This required a certain amount of experience on the part of the designer to choose suitable sections to include in the design.
 Cauer placed the field on a firm mathematical footing, providing tools that could produce exact solutions to a given specification for the design of an electronic filter.
Syphon Filter is a third-person shooter stealth video game developed by Eidetic and published by 989 Studios for PlayStation.
 It is the first game in the "Syphon Filter" series, the plot centres on special agents Gabriel "Gabe" Logan and Lian Xing who are tasked by the United States government to apprehend an international terrorist from Germany.
In digital photography, the RGBE filter is an alternative color filter array to the Bayer filter (GRGB).
 It similarly uses a mosaic of pixel filters, of red, green, blue and "emerald" ("like cyan" according to Sony), and so also requires demosaicing to produce a full-color image.
 It was developed by Sony and so far is used only in the ICX456 8-megapixel CCD and in the Sony Cyber-shot DSC-F828 camera.
Bryce E. Bayer (/ˈbaɪər/; pronounced BYE-er, August 15, 1929 – November 13, 2012) was an American scientist who invented the Bayer filter, which is used in most modern digital cameras.
 He has been called "the maestro without whom photography as we know wouldn't have been the same."
 Without his filter, Larry Scarff, a former chairman of the Camera Phone Image Quality Standards Group, told the New York Times after Bayer's death, "we'd still be getting only black-and-white pictures from our digital cameras."
A Wien filter also known as velocity selector is a device consisting of perpendicular electric and magnetic fields that can be used as a velocity filter for charged particles, for example in electron microscopes and spectrometers.
 It is used in accelerator mass spectrometry to select particles based on their speed.
 The device is composed of orthogonal electric and magnetic fields, such that particles with the correct speed will be unaffected while other particles will be deflected.
 It is named for Wilhelm Wien who developed it in 1898 for the study of anode rays.
 It can be configured as a charged particle energy analyzer, monochromator, or mass spectrometer.
Indovation (an abbreviation of ‘Indian innovation’) is the process by which innovations are developed in India to serve a large number of people affordably and sustainably in response to conditions of scarcity and diversity.
 The individual solutions generated by this process are called indovations.
 The key idea is that poverty is the mother of innovation: reduced circumstances (of the kind found in India) lead to increased effort, creativity and productivity, as reported in the practice of Jugaad among India's rural poor.
 Examples of indovations include the Tata Nano, the Tata swach water filter, Devi Prasad Shetty's affordable cardiac care hospital, the SELCO's solar lighting solutions for consumers off the electricity grid and The First Identified Inexpensive Solar Water Filter was designed and invented by Shripad Krishnarao Vaidya, of Nagpur, Maharashtra, India on 23 April 2010.
 The Specialty of the water filter is Capillary Pumping Technique.
Syphon Filter is a third-person shooter stealth video game series developed by SCE Bend Studio (formerly Eidetic) and published by Sony Computer Entertainment (previously 989 Studios), that has appeared on the PlayStation, PlayStation 2 and PlayStation Portable game systems.
 In the series, "Syphon Filter" is the name given to the mysterious biological weapon.
Helicon Filter, also referred to as Helicon, Filter, or as HF, is a proprietary commercial and shareware photo editing software program for Microsoft Windows, similar to such programs as Adobe Photoshop and GIMP, developed and published by Helicon Soft Ltd.
 Unlike these other programs, Helicon Filter is designed primarily to edit and improve existing photos and not for graphics creation.
 Helicon Filter's interface also differs from other programs in that compact toolbars and menus containing editing tools are replaced with labeled "filter" tabs, each tab containing labeled edit options specific to a single aspect of the picture.
 Although some editors used to Photoshop-style programs may initially find this layout unfamiliar and unlike the standard toolbar layout, beginners and those who don't recognize the standard icons generally find this very helpful for getting through the editing process.
Swamp Thing is a 1982 American superhero science-fiction horror film written and directed by Wes Craven, based on the DC Comics (later Vertigo Comics) character of the same name created by Len Wein and Bernie Wrightson.
 It tells the story of scientist Alec Holland (Ray Wise) who becomes transformed into the monster Swamp Thing (Dick Durock) through laboratory sabotage orchestrated by the evil Anton Arcane (Louis Jourdan).
 Later, he helps a woman named Alice Cable (Adrienne Barbeau) and battles the man responsible for it all, the ruthless Arcane.
Wilhelm Carl Werner Otto Fritz Franz Wien (] ; 13 January 1864 – 30 August 1928) was a German physicist who, in 1893, used theories about heat and electromagnetism to deduce Wien's displacement law, which calculates the emission of a blackbody at any temperature from the emission at any one reference temperature.

Question: What nationality was the scientist who developed the Wein filter ?
Answer: German