Roger Fletcher is a mathematician known for his work in the fields of applied mathematics and numerical analysis, specifically in optimization and algorithms. He is particularly noted for his contributions to the development of iterative methods for solving linear and non-linear optimization problems. One of his notable achievements is the Fletcher-Reeves method, a popular algorithm for unconstrained optimization, which is part of the broader family of gradient descent methods.

Roland Hüttenrauch is not a widely recognized figure, term, or concept as of my last update in October 2023. It is possible that he could be a private individual or a figure that has gained prominence in specific circles or fields that are not well-documented in major sources.

Ronald Wilfred Gurney, commonly referred to as Ron Gurney, was a notable figure in the field of art, specifically as a painter and art educator. He contributed significantly to the development of modern artistic styles and techniques.

Map analysis is a technique used to interpret and analyze spatial data represented in a map format. It involves examining the geographical relationships between different features, patterns, and variables depicted on the map, allowing for deeper insights into the data being represented. Here are some key aspects of map analysis: 1. **Spatial Relationships**: Analyzing the location and relationships of various geographical entities, such as cities, roads, rivers, and political boundaries. This includes understanding proximity, distribution, and connectivity.

Rubik's Snake, also known as Rubik's Twist, is a type of puzzle toy created by Ernő Rubik, the inventor of the original Rubik's Cube. The Rubik's Snake consists of a series of triangular prisms connected by a flexible hinge, allowing them to be twisted and turned in various directions.

The Routh–Hurwitz stability criterion is a mathematical test used in control theory to determine the stability of a linear time-invariant (LTI) system based on the coefficients of its characteristic polynomial. Specifically, it helps assess whether all poles of the system's transfer function have negative real parts, which is a necessary condition for the system to be stable.

The Royal Corps of Military Surveyors and Draftsmen (RCMSD) is a branch of the British Army that specializes in surveying, mapping, and drafting tasks. Its personnel are responsible for providing geospatial information and technical support for military operations. This includes creating maps, plans, and drawings that assist in operational planning and decision-making. The RCMSD plays a crucial role in ensuring that the military has accurate geographical data, which is vital for logistics, strategy, and tactical movements.

The "Rubaiyat of Omar Khayyam" is a collection of Persian quatrains (four-line stanzas) attributed to the 11th-century Persian poet, philosopher, and astronomer Omar Khayyam. The work gained widespread popularity in the West in the 19th century, particularly due to an English translation by Edward FitzGerald published in 1859.

Rubin Braunstein was an American mathematician known for his work in the field of topology, particularly in relation to algebraic topology and homotopy theory. He made contributions in various areas of mathematics, including the study of algebraic structures and their applications to topology. His work has influenced various aspects of mathematics and has been recognized for its depth and originality.

Tomasulo's algorithm is a hardware-based algorithm designed to dynamically schedule instructions in a CPU to optimize the use of execution units and improve performance, particularly in pipelined architectures. Developed by Robert Tomasulo in the 1960s for the IBM 360/91, the algorithm helps to overcome issues like instruction latency and hazards by allowing out-of-order execution of instructions while maintaining data dependencies.

R. W. H. T. Hudson does not appear to be a widely recognized term, entity, or acronym in commonly available information sources up to October 2023. It might refer to an individual, a specific concept, or an organization that is not well-known outside a particular context.

Safari is a web browser developed by Apple Inc. It was first released in 2003 as part of the Mac OS X operating system and has since become the default web browser for Apple's macOS and iOS operating systems. Safari is known for its speed, efficiency, and user-friendly interface. Key features of Safari include: 1. **Performance**: Safari is optimized for Apple's hardware and software, often leading to better performance and battery efficiency on Mac and iOS devices compared to other browsers.

Sailors have a long history of superstitions, many of which stem from their reliance on the sea and the unpredictable nature of maritime life. Here are some common superstitions associated with sailors: 1. **Bamboo on Board**: It's considered bad luck to have bamboo on a ship, as it is thought to bring misfortune. 2. **Whistling**: Whistling on a ship is often seen as a bad omen.

As of my last knowledge update in October 2023, there doesn't appear to be a widely recognized figure or concept specifically called "Samuel Greenhouse." It's possible that it could refer to a person who may be known in a specific context, such as local news, a niche academic field, or a fictional character.

Samuel von Pufendorf (1632-1694) was a prominent German philosopher, jurist, and historian during the late 17th century. He is best known for his contributions to the fields of natural law and political philosophy. Pufendorf's works helped to lay the foundations for modern theories of social contract and natural rights. One of his key ideas was the notion that human beings are social by nature and that society is formed through mutual agreements based on natural law.

Sander P. Zwegers does not appear to be a widely recognized public figure or concept as of my last knowledge update in October 2023.

Sandra Cauffman is an accomplished engineer and NASA official known for her significant contributions to space science and technology. As of my last update, she served as the Deputy Project Manager for the Earth Science Division at NASA. Cauffman has been involved in various projects and missions related to Earth observation and climate research. She is also recognized for her inspiring personal story, having emigrated from Costa Rica to the United States at a young age.

Sarah Demers is a physicist known for her work in experimental particle physics. She is particularly recognized for her contributions to the field while working at CERN, the European Organization for Nuclear Research, and her involvement in the ATLAS experiment at the Large Hadron Collider (LHC). Demers has focused on the study of fundamental particles and their interactions, particularly in the context of searching for new physics beyond the Standard Model.