Have a deep view into what people are curious about.

In combinatory logic for computer science, a fixed-point combinator (or fixpoint combinator),^: p.26 is a higher-order function (i.e. a function which takes a function as argument) that returns some fixed point (a value that is mapped to itself) of its argument function, if one exists.

Formally, if ${\displaystyle {\textsf {fix}}}$ is a fixed-point combinator and the function ${\displaystyle f}$ has one or more fixed points, then ${\displaystyle {\textsf {fix}}\ f}$ is one of these fixed points, i.e.

${\displaystyle f\ ({\textsf {fix}}\ f)={\textsf {fix}}\ f\ .}$

Fixed-point combinators can be defined in the lambda calculus and in functional programming languages and provide a means to allow for recursive definitions.

The Zope Object Database (ZODB) is an object-oriented database for transparently and persistently storing Python objects. It is included as part of the Zope web application server, but can also be used independently of Zope.

Features of the ZODB include: transactions, history/undo, transparently pluggable storage, built-in caching, multiversion concurrency control (MVCC), and scalability across a network (using ZEO).

A comparison of tax rates by countries is difficult and somewhat subjective, as tax laws in most countries are extremely complex and the tax burden falls differently on different groups in each country and sub-national unit. The list focuses on the main indicative types of taxes: corporate tax, individual income tax, and sales tax, including VAT and GST, but does not list capital gains tax.

Some other taxes (for instance property tax, substantial in many countries, such as the United States) and payroll tax are not shown here. The table is not exhaustive in representing the true tax burden to either the corporation or the individual in the listed country. The tax rates displayed are marginal and do not account for deductions, exemptions or rebates. The effective rate is usually lower than the marginal rate. The tax rates given for federations (such as the United States and Canada) are averages and vary depending on the state or province. Territories that have different rates to their respective nation are in italics.

Moin, moi or mojn is a Low German, Frisian, High German (moin [moin] or Moin, [Moin]), Danish (mojn) and Kashubian (mòjn) greeting from East Frisia, Southern Schleswig (including North Frisia and Flensburg), Bremen, Holstein, Mecklenburg-Vorpommern, the eastern and northern Netherlands, Southern Jutland in Denmark and parts of Kashubia.

It means "hello" and, in some places, "goodbye" as well.

The Darién Gap (UK: , US: , Spanish: Tapón del Darién [taˈpon del daˈɾjen], lit. 'Darién plug') is a geographic region in the Isthmus of Darien or Isthmus of Panama connecting the American continents within Central America, consisting of a large watershed, forest, and mountains in Panama's Darién Province and the northern portion of Colombia's Chocó Department.

The "Gap" interrupts the Pan-American Highway. Some 106 km (66 mi) of this between Yaviza, Panama, and Turbo, Colombia, has never been built. Road-building in this area is both expensive and detrimental to the environment. Political consensus in favor of road construction collapsed after an initial attempt failed in the early 1970s, with a proposal in the early 1990s halted by environmental concerns. As of 2023, there was no active plan to build a road through the Gap, although there has been discussion of reestablishing a ferry service.

The geography of the Darién Gap on the Colombian side is dominated primarily by the river delta of the Atrato River, which creates a flat marshland at least 80 km (50 mi) wide. The Serranía del Baudó range extends along Colombia's Pacific coast and into Panama. The Panamanian side, in stark contrast, is a mountainous rainforest, with terrain reaching from 60 m (197 ft) in the valley floors to 1,845 m (6,053 ft) at the tallest peak (Cerro Tacarcuna, in the Serranía del Darién).

The Darién Gap is home to the Embera-Wounaan and Guna people and was also home to the Cueva people who became extinct by 1535, following the Spanish invasion of Panama. Travel is often conducted with pirogues. On the Panamanian side, La Palma, the area's cultural center, is the capital of the province. Other population centers include Yaviza and El Real. The Darién Gap had a reported population of 8,000 in 1995 among five tribes. Maize, cassava, plantains, and bananas are staple crops on local farms.

There is no road, not even a primitive one, across the Darién. One can bypass it by boat, and for some years there was an underused ferry service. The remaining option is to hike from Colombia to Panama by trail, which is possible but very strenuous and dangerous. Heavy rain and flash floods are frequent, law enforcement and medical support are non-existent, rapes and robberies are common, and a broken leg can be fatal, as there is no way to reach assistance. However, this route was taken by hundreds of thousands of migrants since the 2010s, primarily Haitians and Venezuelans, to reach the Mexico–United States border. By 2021, the number was more than 130,000. In 2022, there were 250,000, and by 2023, 360,000 had crossed the Gap.

Anatoli Petrovich Bugorski (Russian: Анатолий Петрович Бугорский), born 25 June 1942, is a Russian scientist.

Paris syndrome (French: syndrome de Paris, Japanese: パリ症候群, pari shōkōgun) is a condition exhibited by some individuals when visiting or going on vacation to Paris, as a result of extreme shock at discovering that Paris is different from their expectations. The syndrome is characterized by a number of psychiatric symptoms such as acute delusional states, hallucinations, feelings of persecution (perceptions of being a victim of prejudice, aggression, or hostility from others), derealization, depersonalization, anxiety, and also psychosomatic manifestations such as dizziness, tachycardia, sweating, and others, such as vomiting. Similar syndromes include Jerusalem syndrome and Stendhal syndrome. The condition is commonly viewed as a severe form of culture shock. It is particularly noted among Japanese travellers. It is not listed as a recognised condition in the Diagnostic and Statistical Manual of Mental Disorders.

Codd's twelve rules are a set of thirteen rules (numbered zero to twelve) proposed by Edgar F. Codd, a pioneer of the relational model for databases, designed to define what is required from a database management system in order for it to be considered relational, i.e., a relational database management system (RDBMS). They are sometimes jokingly referred to as "Codd's Twelve Commandments".

Crew resource management or cockpit resource management (CRM) is a set of training procedures for use in environments where human error can have devastating effects. Used primarily for improving aviation safety, CRM focuses on interpersonal communication, leadership, and decision making in the cockpit of an airliner. Its pioneer was David Beaty, a former Royal Air Force pilot and later a BOAC pilot who wrote his seminal book The Human Factor in Aircraft Accidents in the late 1950s. Despite the considerable development of electronic aids since then, many principles he developed continue to prove effective today.

Crew resource management formally began with a National Transportation Safety Board (NTSB) recommendation made during their investigation of the 1978 United Airlines Flight 173 crash. The issues surrounding that crash included a DC-8 crew running out of fuel over Portland, Oregon while troubleshooting a landing gear problem.

The term "cockpit resource management" (later generalized to "crew resource management") was coined in 1979 by NASA psychologist John Lauber who had studied communication processes in cockpits for several years. While retaining a command hierarchy, the concept was intended to foster a less authoritarian cockpit culture, where co-pilots were encouraged to question captains if they observed them making mistakes.

Crew resource management grew out of the 1977 Tenerife airport disaster where two Boeing 747 aircraft collided on the runway killing 583 people. A few weeks later, NASA held a workshop on the topic, endorsing this innovative training. United Airlines was the first airline to provide CRM training for its cockpit crews in 1981. By the 1990s, it had become a global standard.

United Airlines additionally trained their flight attendants to use CRM in conjunction with the pilots to provide another layer of enhanced communication and teamwork. Studies have shown that by both work groups using CRM together, communication barriers are reduced and problems can be solved more efficiently, leading to increased safety. CRM training concepts have been modified for application to a wide range of activities where people must make dangerous time-critical decisions. These arenas include air traffic control, ship handling, firefighting, and medical operating rooms.

An XML appliance is a special-purpose network device used to secure, manage and mediate XML traffic. They are most popularly implemented in service-oriented architectures (SOA) to control XML-based web services traffic, and increasingly in cloud-oriented computing to help enterprises integrate on premises applications with off-premises cloud-hosted applications. XML appliances are also commonly referred to as SOA appliances, SOA gateways, XML gateways, and cloud brokers. Some have also been deployed for more specific applications like Message-oriented middleware. While the originators of the product category deployed exclusively as hardware, today most XML appliances are also available as software gateways and virtual appliances for environments like VMWare.