Siméon Denis Poisson (1781–1840) was a French mathematician and physicist known for his contributions to various fields, including mathematics, physics, and probability theory. He is best known for the Poisson distribution in probability theory, which describes the number of events occurring in a fixed interval of time or space under certain conditions, reflecting events that occur independently and with a known constant mean rate.

In geometry, similarity refers to a fundamental relationship between two shapes or figures that have the same form but may differ in size. Two geometric figures are considered similar if they have: 1. **The same shape**: This means that the angles of both figures are congruent (equal), and the sides of the figures are in proportion. 2. **Proportional corresponding sides**: The lengths of the corresponding sides of the two figures maintain a constant ratio.

Simple Public Key Infrastructure (SPKI) is a method for managing public key cryptography that simplifies some of the complexities associated with traditional Public Key Infrastructure (PKI). While traditional PKI often involves a hierarchical structure of Certificate Authorities (CAs) to issue and manage digital certificates, SPKI aims to provide a more straightforward and flexible approach.

Single molecule fluorescent sequencing (SMFS) is a next-generation sequencing technology that allows for the direct observation and sequencing of individual DNA or RNA molecules using fluorescent labeling. This technique stands out from traditional sequencing methods, which typically involve amplifying DNA before sequencing, as it provides higher accuracy and the ability to analyze longer contiguous sequences.

In the context of global governance, a "singleton" refers to a theoretical concept where there is a single, overarching authority or entity that has the power to govern or regulate global issues. This could mean a world government or a central institution that holds authority over international law, security, economic policies, and environmental regulations, among other areas.

In the context of module theory, the concept of a singular submodule arises when studying modules over a ring in relation to their annihilators. Specifically, given a module \( M \) over a ring \( R \), a submodule \( N \) of \( M \) is called a **singular submodule** if it consists of elements that can be "killed" by some non-zero element of the ring \( R \).

Sketch recognition is a technology and field of research that focuses on identifying and interpreting hand-drawn sketches and diagrams made by users. The goal is to enable computers to understand and process these sketches in a way that mimics human understanding. ### Key Aspects of Sketch Recognition: 1. **Input Types**: - Sketch recognition can involve various forms of input, including freehand drawings, geometric shapes, and diagrams created with styluses or touchscreens.

Skill chaining is a concept often used in the context of education, training, and personal development. It refers to the process of linking together multiple skills or competencies in a sequence, allowing individuals to build upon their existing knowledge and abilities to achieve more complex tasks or goals. In practical terms, skill chaining can involve: 1. **Breaking Down Complex Skills**: Complex skills are often broken down into smaller, manageable components or individual skills.

Slice preparation often refers to a process used in various scientific and industrial contexts, most commonly in biology and materials science. The specific meaning can vary depending on the context. Below are a few interpretations of "slice preparation": 1. **Histology (Biological Context)**: - In histology, slice preparation involves cutting thin sections of biological tissues for microscopic examination.

Slot insulation refers to the materials used to insulate the slots in electric motors, generators, and transformers. The slots are the spaces within the stator or rotor where the windings (coils of wire) are placed. Proper insulation is critical in these applications for several reasons: 1. **Electrical Insulation**: It prevents short circuits between the windings and the core, ensuring that electrical energy flows correctly through the motor or generator.

The term "sluice" can refer to different things depending on the context in which it is used. Here are a few common meanings: 1. **Water Management**: In hydraulic engineering, a sluice is a water channel or gate used to control the flow of water. It can be part of a larger irrigation system, dam, or waterway, allowing for the regulation of water levels and flow rates.

Słupsk Bank, also known as Bank Słupsk, was a regional cooperative bank located in the city of Słupsk, Poland. It primarily served local communities and small businesses, offering various banking services such as savings accounts, loans, and other financial products tailored to the needs of its clientele. Cooperative banks in Poland, like Słupsk Bank, typically focus on local development and community engagement.

In mathematics, particularly in the field of algebraic topology, a **Smith space** refers to a specific type of topological space associated with the concept of **homology**. The most basic Smith space is related to the construction of the **Smith homology** theory, which is used to study the algebraic properties of topological spaces. In particular, Smith spaces can be viewed in the context of generalized homology theories and derived functors in algebraic topology.

Smokeless powder is a type of propellant used in firearms and ammunition that produces very little smoke when ignited, which is a key advantage over traditional black powder. It is composed of nitrocellulose, often with the addition of other chemical substances to modify its properties and performance. The main types of smokeless powder are single-base, which contains primarily nitrocellulose, and double-base, which includes both nitrocellulose and nitroglycerin.

A smooth clean surface refers to a surface that is even, free of imperfections, and has a uniform texture and appearance. This can apply to various materials, including metal, glass, wood, plastic, and more. Key characteristics of a smooth clean surface include: 1. **Even Texture:** The surface should be free of bumps, scratches, or pits that can create friction or hinder cleaning.

Snappy is a compression and decompression library developed by Google designed for high throughput and low latency. Unlike some other compression algorithms that prioritize maximum compression ratio, Snappy focuses on speed and efficiency, making it particularly suitable for applications where speed is critical and where some loss in the compression ratio can be tolerated. ### Key Features of Snappy: 1. **Speed**: Snappy is optimized for fast compression and decompression, making it ideal for real-time applications.

"Social in the City" can refer to various initiatives, events, or concepts that focus on socializing and building community within an urban environment. However, without more specific context, it's challenging to pinpoint exactly what you're referring to, as the phrase could be used in various ways.

Social intuitionism is a psychological and philosophical theory concerning moral judgments and ethical decision-making. It posits that moral reasoning is primarily intuitive—rooted in automatic, emotional responses—rather than a result of deliberate, rational thought. This concept was notably developed by psychologist Jonathan Haidt. Key aspects of social intuitionism include: 1. **Intuition over Reason**: The theory suggests that people often arrive at moral judgments through quick, instinctive reactions.

The Söderala vane is a type of traditional Swedish wooden wind vane that originates from Söderala, a locality in the municipality of Söderhamn, Sweden. These vanes are often intricately carved and were historically used on the roofs of buildings to indicate the direction of the wind. The design typically features decorative elements, and they are appreciated both for their practical use and as pieces of folk art.