Dehn surgery is a concept in the field of 3-manifold topology, named after the mathematician Rudolf Dehn. It is a technique used to construct new 3-manifolds from a given 3-manifold by cutting along a torus and gluing back the resulting boundary in a specific way.

Delores Conway is a professor known primarily for her work in the fields of statistics and data science, particularly in relation to the analysis of data in various applications. She has made contributions to statistical education and research, often focusing on practical applications of statistical methods.

Devolvement typically refers to the process of transferring powers, responsibilities, or decision-making authority from a central authority to a lower level of government or organization. This can occur in various contexts, such as political governance, business management, or organizational structures. In a political context, devolvement might involve a central government delegating powers to regional or local governments, allowing them to have more autonomy over certain functions, such as education, transportation, or health services.

Dexter Kozen is a prominent computer scientist known for his work in the fields of theoretical computer science, particularly in areas such as programming languages, formal methods, and algorithms. He has made significant contributions to the theory of automata, computational complexity, and the semantics of programming languages. Kozen is also known for his development of the concept of "Hoare logic" and for his work in the area of type systems, as well as for his research on formal verification and software correctness.

Diallo Sène is not widely recognized or may refer to a specific individual not covered in common sources through my last update in October 2021. It’s possible that the name could refer to a person, a brand, or a place, but without additional context, it's difficult to provide a precise answer.

Dimitrije Nešić is a name that may refer to various individuals, but there isn't a widely known public figure or topic by that exact name in popular databases or news sources as of my last training data in October 2023. If you're referring to a specific Dimitrije Nešić or context (e.g.

In topology, a **Dowker space** is a specific kind of topological space that has peculiar properties related to separability. A space \(X\) is called a Dowker space if it is a normal space (which means that any two disjoint closed sets can be separated by neighborhoods) but not every countable closed set in \(X\) can be separated from a point not in the closed set by disjoint neighborhoods.

A reverse auction is a purchasing method in which the roles of buyer and seller are reversed compared to a traditional auction. In a reverse auction, instead of bidders competing to offer the highest price for an item, sellers compete to offer the lowest price for goods or services the buyer wants to procure. ### Key Characteristics of Reverse Auctions: 1. **Buyer Initiates the Auction:** The buyer specifies what they need (e.g., goods, services) and invites suppliers or sellers to bid on providing those items.

Dr. J. Butz may refer to a specific individual, but without more context, it's difficult to determine who you are referring to. There could be various individuals with that name in different fields, such as medicine, academia, or other professions. If you have additional details or context regarding Dr. J.

Donald Macleod is a notable physicist recognized for his contributions in the field of physics, particularly in areas related to experimental physics, materials science, or condensed matter physics. However, detailed information about specific contributions or scientific achievements associated with him may not be widely available or documented in prominent resources.

A driver's manual, often referred to as a driver's handbook or driver's guide, is a comprehensive resource provided by a state or national transportation agency that contains essential information for individuals who are learning to drive or are preparing to obtain a driver's license. The manual typically includes: 1. **Traffic Laws**: Detailed explanations of the rules and regulations governing road use, including speed limits, right-of-way rules, and the legal implications of driving violations.

A Dutch auction is a type of auction where the auctioneer starts with a high asking price and then systematically lowers the price until a bidder accepts the current price. The process continues until the item is sold or the auctioneer decides to stop. This auction format is different from a traditional English auction, where the price starts low and bidders compete by raising the bid. Dutch auctions are commonly used for selling multiple identical items or in situations where speed is essential, as they can finalize a sale quickly.

Dynamic Mode Decomposition (DMD) is a data-driven technique used in the analysis of dynamical systems, particularly for identifying patterns and extracting coherent structures from time-series data. It was introduced as a method for analyzing fluid flows and has since found applications in various fields such as engineering, biology, finance, and more. ### Key Concepts: 1. **Data Representation**: DMD decomposes a set of snapshots of a dynamical system into modes that represent the underlying dynamics.

The Global Forecast System (GFS) is a numerical weather prediction model developed and operated by the National Centers for Environmental Prediction (NCEP), which is part of the National Oceanic and Atmospheric Administration (NOAA) in the United States. The GFS is designed to provide forecasts of weather conditions globally by simulating the atmosphere's physical processes using mathematical equations.

Dynamic Topic Models (DTM) are a variant of topic modeling that extend traditional static topic models (like Latent Dirichlet Allocation, or LDA) to account for the evolution of topics over time. Traditional topic models identify themes in a collection of documents, but they typically analyze the documents as a static set, treating their content as a snapshot without considering any temporal aspects. DTM, on the other hand, is designed to analyze a corpus of documents that spans multiple time periods.

Earthquake swarms are sequences of earthquakes that occur in a specific area within a relatively short time frame, but unlike traditional earthquakes, they do not have a single main shock followed by aftershocks. Instead, swarms consist of multiple earthquakes of varying magnitudes, often with no clear main event. Key characteristics of earthquake swarms include: 1. **Duration**: Swarms can last from days to months or even longer.

In the context of complexity theory, \( E \) typically refers to the complexity class of problems that can be solved by a deterministic Turing machine in exponential time. More formally, a decision problem is in \( E \) if there exists a deterministic Turing machine that can solve the problem in time \( 2^{p(n)} \) for some polynomial \( p(n) \), where \( n \) is the size of the input.

"Edisonade" is a term used to describe a subgenre of speculative fiction, particularly science fiction, that emerged in the late 19th and early 20th centuries. The term is derived from the name of Thomas Edison, the famous inventor and businessman, as well as other contemporary inventors and scientific figures. Edisonades typically feature young protagonists, often boys or young men, who are inventors or amateur scientists.

Édmée Chandon is a brand of sparkling wine produced in the Champagne region of France. It is typically categorized as a premium sparkling wine, and it may be associated with the broader category of Champagne or similar products. Chandon itself is a well-known producer that originated as a branch of Moët & Chandon, one of the most prestigious Champagne houses. Chandon has expanded its operations to various regions around the world, creating sparkling wines that reflect local terroirs.

Rail transport varies significantly by location, influenced by factors such as geography, history, economic development, and population density. Below are some key regions and their characteristics regarding rail transport: ### North America - **United States**: Features an extensive freight network, primarily serving the transportation of goods. Notable passenger services include Amtrak, which operates several long-distance routes. Urban areas often have commuter rail services. - **Canada**: Similar to the U.S. with a focus on freight transport.