Santa Cruz

Santa Cruz (or Santacruz) may refer to:

Places

Africa

Asia and Oceania

India

Philippines

Europe

Portugal

Azores

Romani people

The Romani (also spelled Romany; /ˈroʊməni/, /ˈrɒ-/), or Roma, are a traditionally itinerant ethnic group living mostly in Europe and the Americas, who originate from the northwestern regions of the Indian subcontinent, specifically from Northern India, presumably from the northwestern Indian states Rajasthan,Haryana and Punjab. The Romani are widely known among English-speaking people by the exonym and racial slur "Gypsies" (or "Gipsies"), which, according to many Romani people, connotes illegality and irregularity. Other exonyms are Ashkali and Sinti.

Romani are dispersed, with their concentrated populations in Europe — especially Central, Eastern and Southern Europe including Turkey, Spain and Southern France. They originated in Northern India and arrived in Mid-West Asia, then Europe, around 1,000 years ago, either separating from the Dom people or, at least, having a similar history; the ancestors of both the Romani and the Dom left North India sometime between the sixth and eleventh century.

Dub

Dub, Dubs, Dubí, or dubbing may refer to:

Places

Many places in Slavic countries, where "dub" means "oak tree":

Music

Catalysis

Catalysis (/kəˈtælᵻsᵻs/) is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalyst (/ˈkætəlᵻst/). With a catalyst, reactions occur faster and require less activation energy. Because catalysts are not consumed in the catalyzed reaction, they can continue to catalyze the reaction of further quantities of reactant. Often only tiny amounts are required.

Technical perspective

In the presence of a catalyst, less free energy is required to reach the transition state, but the total free energy from reactants to products does not change. A catalyst may participate in multiple chemical transformations. The effect of a catalyst may vary due to the presence of other substances known as inhibitors or poisons (which reduce the catalytic activity) or promoters (which increase the activity). The opposite of a catalyst, a substance that reduces the rate of a reaction, is an inhibitor.

Catalyzed reactions have a lower activation energy (rate-limiting free energy of activation) than the corresponding uncatalyzed reaction, resulting in a higher reaction rate at the same temperature and for the same reactant concentrations. However, the detailed mechanics of catalysis is complex. Catalysts may affect the reaction environment favorably, or bind to the reagents to polarize bonds, e.g. acid catalysts for reactions of carbonyl compounds, or form specific intermediates that are not produced naturally, such as osmate esters in osmium tetroxide-catalyzed dihydroxylation of alkenes, or cause dissociation of reagents to reactive forms, such as chemisorbed hydrogen in catalytic hydrogenation.

Music festival

A music festival is a festival oriented towards music that is sometimes presented with a theme such as musical genre, nationality or locality of musicians, or holiday. They are commonly held outdoors, and are often inclusive of other attractions such as food and merchandise vending, performance art, and social activities. Many festivals are annual, or repeat at some other interval. Some, including many rock festivals, are held only once. Some festivals are organized as for-profit concerts and others are benefits for a specific cause. Another type of music festival is the educative type, organized annually in local communities, regionally or nationally, for the benefit of amateur musicians of all ages and grades of achievement.

History

The Pythian Games at Delphi included musical performances, and may be one of the earliest festivals known. During the Middle Ages festivals were often held as competitions.

Another type of music festival is the educative type, organized annually in local communities, regionally or nationally, for the benefit of amateur musicians of all ages and grades of achievement. While entrants perform prepared pieces in the presence of an audience which includes competitors, the essential feature of this type of festival is that each participant receives verbal and written feedback, there and then, from a highly qualified, professional adjudicator—someone whom they might never meet in any other way. They also usually receive a certificate, classified according to merit, and some may win trophies. The competitive element is often played down, however, as the important aspect is that participants can learn from one another. Such festivals aim to provide a friendly and supportive platform for musicians to share in the excitement of making music. For many they provide a bridge between lessons & examinations and performing confidently in public.