fschieber/wit-captions huggingface dataset:
Doppler NEXRAD radar image of two mesocyclones with one supercell passing over Northern Michigan on July 3rd, 1999 at 23:41 UTC. Rotations is seen as small couplets of red (away) and green (toward) radial velocities. The thick circles represents 3D vortices which have been classified as mesocyclones near the ground by a detection algorithm. The left mesocyclone is associated with a tornado while to the right a larger area of rotation has developed.
English: Detection by the WSR-88D radar (NEXRAD) two mesocyclones with a supercell passing over Northern Michigan July 3rd, 1999 at 23:41 UTC. Thin yellow circles represent incipient or weak 3D vortex detections, Thick yellow and red circle represents a 3D vortex which has been classified as a mesocyclone, with its base detected at the 0.5 degree elevation sweep of the volume scan. A tornado and associated mesocyclone are seen while to the east a larger area of rotation has developed. Français : Détection de mésocyclones par un radar américain WSR-88D (NEXRAD) sur le nord du Michigan le 3 juillet 1999. Les minces cercles jaunes sont la détection d’une faible rotation en trois dimensions (3D) alors que le grand cercle jaune et rouge représente un mésocyclone 3D avec sa base détectée à l’angle le plus bas de 0,5 degré. Une tornade est associée avec la rotation à gauche alors qu’une zone de mésocyclone se développe à droite.
Esempio di form in HTML di un'applicazione web per la raccolta dati di un profilo utente (logica di presentazione): i dati inseriti ed inviati vengono poi passati alla logica di business dell'application server per l'elaborazione e l'inserimento eventuale nel database (data layer) (architettura three-tier); al rovescio un'applicazione web può visualizzare i dati su richiesta dell'utente passando per la logica di business ed un'interrogazione del DB
Campione di web form
Teatro de operações da Primeira Guerra Púnica entre 261 e 259 a.C..

  Território siracusano
  Território cartaginês
  Territórios romanos
1. Vitória naval dos cartagineses na Batalha das ilhas Líparas (260 a.C. & 258-7 a.C.).

2. Vitória naval romana na Batalha de Milas (260 a.C.).

3. Romanos liberam o cerco de Segesta (260 a.C.).

4. Romanos são derrotados por Amílcar (não o Barca) em Hímera (260 a.C.).

5. Amílcar toma Enna e Camarina (259 BC).
Una lucha simplificada de ko en un tablero de 9×9. El ko está en punto marcado con un cuadrado—Negro ha "tomado el ko" primero. La lucha de ko determina la vida de los grupos A y B—solo uno sobrevive, el otro es capturado. Blanco puede jugar C como una amenaza ko, y Negro responde apropiadamente en D. Blanco puede luego "tomar el ko" jugando en el punto marcado con un cuadrado (capturando la piedra negra). E es una posible amenaza de ko para Negro.
English: Simplified example of a ko fight, with a sizeable ko and listed ko threats.
Учесници ЛКС 1967, 1968. и 1969. били су смештени испод стрмих литица Куновичке површи (посебне морфотектонске и предеона целина Нишке котлине у коју је усечена Сићевачка клисура Нишаве), у живописном пределу под називом Кусача, испод њеног највишег врха „Големи камен“ (771 m), у викенд насељу и синдикалном опдмаралишту, а у непосредно уз манастирски комплекс Свете Богородице Сићево (оивичен жутом бојом) окруженом густом претежно листопадном шумом.
Srpski (latinica)‎: Mikrolokacija Manstira Sićevo This is a photo of Cultural Heritage site of Serbia number СК 230
Вторият випуск лесовъди пред Агрономо-лесовъдния факултет на Софийския университет (сега Биологически факултет), юни 1930 година. Отпред седнали преподавателите. Отляво надясно: Васил Стоянов (лесоползване), Борис Стефанов (дендрология, анатомия на дървото, горска фитоценология), Тодор Димитров (частно лесовъдство (горски култури)), Темелко Иванчев (горска таксация, лесоустройство), Тома Захариев (общо лесовъдство), Методи Русков (общо лесовъдство)
Български: Вторият випуск лесовъди пред Агрономо-лесовъдния факултет (сега Биологически факултет), юни 1930 година. Преподавателите: седнали отляво надясно: Васил Стоянов (лесоползване), Борис Стефанов (дендрология, анатомия на дървото, горска фитоценология), Тодор Димитров (частно лесовъдство (горски култури)), Темелко Иванчев (горска таксация, лесоустройство), Тома Захариев (общо лесовъдство), Методи Русков (общо лесовъдство).
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Ekvidistansen anger höjdskillnaden mellan två höjdkurvor (bruna). Om ekvidistansen är 5 meter har kullen till vänster en stigning på 8×5 = 40 m. Var femte höjdkurva är extra markerad, vilket gör det enkelt att snabbt avläsa större höjdskillnader. De streckade kurvorna är så kallade hjälpkurvor som är 2,5 meter mellan höjdkurvorna för att visa ytterligare aspekter av terrängen. Kurvorna till höger har ett tvärstreck som betyder att de utgör en grop.
English: Contour lines for orienteering maps. Created by MrD (in the cartography program OCAD Svenska: Höjdkurvor för orienteringskartor. Skapad av MrD (i kartritningsprogrammet OCAD)
They heard a drunken cough, and a tall, black-bearded peasant wearing a winter cap came into the hut, and was the more terrible because his face could not be seen in the dim light of the little lamp. It was Kiryak. Going up to his wife, he swung his arm and punched her in the face with his fist. Stunned by the blow, she did not utter a sound, but sat down, and her nose instantly began bleeding.

Ilya Repin's illustration for the 1899 French edition
English: Chekhov's Peasants illustrated by Ilya Repin
Cartoon examples of common tensile fracture mechanisms in laboratory rock samples. A) Axial stretching: tension is applied far from the crack. B) Hydraulic fracturing: tension or compression is applied far away from the crack and fluid pressure increases, causing tension on the face of the cracks. C) Brazilian disc test: applied compressive loads parallel to the crack cause the sides of the disk to bulge out and tension to occur on the crack faces.
English: Tensile fracture mechanisms in rock.
Jacinto de Molina Mendoza: Retrato del pintor Miguel Pérez de Aybar, óleo sobre lienzo, 83 x 62 cm, Granada, Museo de Bellas Artes. Inscripción: «Nº Hº Miguel Pérez de Aybar, varón de excelentes virtudes, natural / de Tudela de Navarra. Murió a 15 de ag[to] de 1697. Está separ[do] su cu / erpo en la parroq de Sr. Sn. Jospeh en esta ciudad. Cap[lla] del Sagrarº. Fue / recibido en esta Sta. escuela jueb[s] 6 de Marcª de 1664 y uno de sus fundadores».
Español: Retrato del pintor español Miguel Pérez de Aibar († 1697).
Recirculação da ureia. Mecanismo pelo qual alta concentração de ureia é mantida na medula (1) à custa da sua difusão da luz do ducto coletor medular interno para a papila e reabsorção ao nível da porcão fina ascendente da alca de Henle (entapas 1 a 7) e (2) à custa da sua retirada do interstício pelos vasa recta sendo novamente filtrada e lancada na luz tubular. Adaptado de Valtin, H. e Schafer, J.A. Renal Function, Little, Brown and Company, 1995.
Português: Sistema unitário
El efecto óptico de Talbot para la luz monocromática, mostrado como una "alfombra de Talbot". A la izquierda de la imagen, la luz se puede ver difractándose a través de una red, y ese patrón exacto se reproduce a la derecha de la imagen. (una longitud de Talbot lejos de la red). A mitad de la distancia, se observa la imagen desplazada hacia un lado, y , en fracciones regulares de la longitud de Talbot, se pueden apreciar claramente las subimágenes.
Español: El efecto óptico de Talbot para la luz monocromática, mostrado como una "alfombra de Talbot". A la izquierda de la imagen, la luz se puede ver difractandose a través de una red, y ese patrón exacto se reproduce a la derecha de la imagen. (una longitud de Talbot lejos de la red). A mitad de la distancia, se observa la imagen desplazada hacia un lado, y ,en fracciones regulares de la longitud de Talbot, se pueden apreciar claramente las subimágenes.
Ikonen waren und sind Hauptbestandteile von Prozessionen. Diese Form öffentlicher Fürbitte und Heils wurde über Jerusalem nach Konstantinopel übertragen.  So fanden seit dem 6. Jahrhundert jeweils Dienstags und Freitags zwei große Ikonenprozessionen statt, die durch die wundertätigen Ikonen der Theotokos, Hodegetria, Theotokos Eleusa und Theotokos Blachernitissa angeführt wurden. Diesen Hauptikonen schlossen sich zahlreiche weitere Marienikonen an.
Двусторонняя выносная икона. Богоматерь Одигитрия Смоленская. На обороте - Никола, Борис и Глеб. Two-sided portable icon for Crucession: A. Our Lady of Smolensk. B. Ss. Nicolas, princes Boris and Gleb
Corridas de Toros en España:      Corridas de toros prohibidas.[20]​      Sin prohibición, pero históricamente las corridas no se realizan.      Corridas prohibidas, pero otras actividades donde se lidian toros protegidas por ley.[21]​      Corridas legales, pero prohibidas en algunos lugares,[22]​ o permitidas con límites.      Corridas legales.      Corridas legales y declaradas Bien de Interés Cultural o Patrimonio Cultural Inmaterial.[23]​[24]​
Español: Corridas de Toros en España en 2015ː    Corridas de toros prohibidas.    Sin prohinbición, pero históricamente las corridas no se realizan.    Corridas prohibidas, pero otros festejos donde participan toros, protegidos por ley.    Corridas legales, pero prohibidas en algunos lugares.    Corridas legales.    Corridas legales y protegidos por ley (declaradas Bien de Interés Cultural o Patrimonio Cultural Inmaterial). English: Bullfighting in Spain in 2015ː    Bullfighting banned.    Bullfighting legal, but traditionally not practiced.    Bullfighting banned, but other spectacles involving cattle protected by law.    Bullfighting legal, but banned in some places.    Bullfighting legal.    Bullfighting legal and protected by law (declared as Cultural Interest or Intangible Cultural Heritage).
Dante cerca di persuadere Scarpetta Ordelaffi a muovere contro Firenze a capo dei fuoriusciti romagnoli e toscani. In questo dipinto del 1854 di Pompeo Randi, Dante cerca l'appoggio dell'Ordelaffi contro i guelfi. Dante in quel periodo era infatti esule e fu ospitato a Forlì nel marzo del 1303 dall'Ordelaffi,  vir nobilis et ghibellinorum in Forlivio princeps. Dante ricoprì l'incarico di epistolarum dictator, una sorta di consigliere dell'Ordelaffi
Italiano: In questo dipinto, Dante cerca l'appoggio dell'Ordelaffi contro i guelfi. Dante in quel periodo era infatti esule e fu ospitato a Forlì nel marzo del 1303 dall'Ordelaffi, vir nobilis et ghibellinorum in Forlivio princeps. Dante ricoprì l'incarico di epistolarum dictator, una sorta di consigliere dell'Ordelaffi.
Vidimus, en latin, par Philippe le Bel d’un acte, en français, de sa tante Jeanne d’Alençon et de deux de ses propres actes, le premier en latin et le second en français, par lesquels est confirmé l’amortissement à l’abbaye de la Clarté-Dieu d’une somme de cent livres tournois à percevoir chaque année à la Toussaint sur la rente annuelle de 3000 livres tournois qu’il a faite à sa tante en échange du comté de Chartres. Archives nationales de France.
Français : Vidimus, en latin, par Philippe le Bel d’un acte, en français, de sa tante Jeanne d’Alençon et de deux de ses propres actes, le premier en latin et le second en français, par lesquels est confirmé l’amortissement à l’abbaye de la Clarté-Dieu d’une somme de cent livres tournois à percevoir chaque année à la Toussaint sur la rente annuelle de 3000 livres tournois qu’il a faite à sa tante en échange du comté de Chartres.
The IMSR uses a passive, always-on backup cooling system for the reactor. A cooling path is provided between the outside of the guard vessel that surrounds the Core-unit. Any heatup of the Core-unit will increase heat transfer to the guard vessel, in turn increasing heat loss to the natural circulation gas. The heated gas is cooled by the reactor building metal roof, and is returned to the guard vessel to be heated again. Click on image to enlarge.
English: Description of the IMSR passive closed cooling system, IRVACS
Տեսական ֆիզիկայի ամբիոնի աշխատակիցները, 5-ը մայիսի, 2011 թ.:  Ամբիոնի վարիչ՝  ակադեմիկոս, պրոֆեսոր Էդվարդ Չուբարյան։  
Պրոֆեսորներ՝  Ռոլանդ Ավագյան, Արամ Սահարյան, Գագիկ Կրյուչկյան, Բաբկեն Խաչատրյան, Լևոն Գրիգորյան, Գոհար Հարությունյան, Կարեն Շահաբասյան։  
Դոցենտներ՝  Վաչագան Հարությունյան, Լևոն Մարդոյան, Աշոտ Հովսեփյան։  
Ասիստենտներ՝  Վադիմ Օհանյան, Արամ Մխիթարյան, Ռուբիկ Պետրոսյան։  
Դասախոսներ՝  Վահագն Պողոսյան, Տիգրան Հակոբյան, Ավետիս Սադոյան։
English: 2011 05 Edvard Chubaryan 75th Birthday 57
Fotografía de Juan Czajkowski (a la izquierda, de pie) junto a su esposa Teresa Jaskolowski, sus padres Mariana Smichowski y Andrés Czajkowski (sentados, en el centro), sus hermanas Josefa, Helena, Isabel y Clara (a la derecha, de pie), y sus seis primeros hijos (de izquierda a derecha: Agnes (Inés), Uladislada Salesia (Salka), Casimira (Ángela), Rafael, Juana y Cecilia. Fotografía de diciembre de 1927, en la aldea de Azara (provincia de Misiones).
Navidad de 1925 de 3 generaciones de la Familia Czajkowski en su casa de Azara, Misiones, Argentina. Sentados al centro Mariana Sniechowska y Andreas Czajkowski. Izq. sentada Teresa Jaskolowska y de pie Juan Czajkowski (sus hijos Rafael, Celicia Helena, Juana Casimira, Casimira, Uladislada Salesia y Agnes).
Representación del individuo como un círculo. A la izquierda el modelo de Donald Winnicott (1963). Representa una personalidad cerrada con un trastorno neurótico. Los trastornos se ilustran por las líneas blancas en su interior. Vamik Volkan (2001) completó la ilustración con una más (a la derecha)en la que representa los rasgos disociativos de la llamada "organización borderline". Las áreas blancas son mayores y se sitúan sobre el nivel neurótico.
The Image illustrates dissociation in the field of psychology, according to the ideas of Donald Winnicott (1963) and Vamik Volkan (2001). It refers to Borderline Personality Disorder (BPD).
Modélisation de l'« animal théorique », par le zoologiste Paul Bert (1833-1886), qui l'utilisait au XIXe siècle comme modèle fictif et pédagogique pour présenter les systèmes associés qui caractérisent selon lui l'organisme animal[1].
D : appareil digestif ; 
R : appareil respiratoire ; 
E : appareil excréteur ;
C : appareil circulatoire ;
N : appareil nerveux. 
Les flèches désignent les flux de nutriments, d'oxygène, d'excréments et/ou d'excrétas.
Français : Reprise et mise en couleur de l' "Animal théorique" ; Légende : D, appareil digestif ; R, appareil respiratoire ; E, appareil excréteur ;C, appareil circulatoire ; N appareil nerveux (d'après la figure 24 - dans le domaine public, car publiée en 1881- ) du cours de zoologie de Paul Bert (1833-1886), Paul Bert (1833-1886), Leçons de zoologie" 1881 ; Éditeur : G. Masson (Paris) English: Recovery and coloring of the "Animal theoretical"; Legend: D, digestive system, R, respiratory system, E, excretory system, C, circulatory system, N, nervous system (from Figure 24 during zoology Paul Bert (1881)
An example of one of Sylvanus Morley's drawings of Maya hieroglyphic inscriptions, taken from his 1915 publication. This illustrates the text appearing on a lintel in the Chichen Itza building commonly known as the "Temple of the Initial Series", as it is the only inscription for the site known to show a Maya Long Count Calendar date. The date shown here (starting row 2, ending at A5) is 10.2.9.1.9 9 Muluk 7 Sak (equivalent to July 30, 878 CE).[34]
Ngôi mộ của vua Numidia Massinissa (khoảng năm 238–148 TCN). Massinissa, tù trưởng của bộ lạc Massyli, ban đầu là đồng minh của người Carthage và đã chiến đấu chống lại người La Mã ở Iberia, nhưng sau trận Ilipa vào năm 206 TCN, ông ta chuyển phe. Sự trợ giúp của ông trong trận Zama có ý nghĩa quan trọng với chiến thắng của người La Mã. Massinissa là đồng minh của Roma cho tới hết cuộc đời mình. Địa điểm: Shoumaa el-Khroub, gần Constantine, Algeria
Soumaa El'Khroub, Tomb of Massinissa (Algeria) photo token by M.GASMI 2004. Source= Own photograph by uploader. Author= M.GASMI. Removed watermark read: © Moslim GASMI Long thought to be the tomb of Massinissa, it is now considered to be the tomb of his son, Micipsa. See Christine Hamdoune, "Massinissa, roi african et allié de Rome" No. 345 (2009) L'Histoire 82-87 at p. 87.
L'Abeille Megachile rotundata est l'un des hyménoptères qui sont de bons pollinisateurs de la luzerne[33]. Elle fait pour cette raison l'objet de programme de gestion restauratoire en Amérique du Nord[34],[35], comme d'autres abeilles sauvages[36], alors que l'abeille domestique est également en forte régression. Les grandes monocultures intensives de luzerne peuvent aussi favoriser la pullulation de prédateurs des pollinisateurs de la luzerne [37]
The Westinghouse Atom Smasher, an early Van de Graaff accelerator built 1937 at the Westinghouse Research Center in Forest Hills, Pennsylvania. The cutaway shows the fabric belts that carry charge up to the mushroom-shaped high voltage electrode.  To improve insulation the machine was enclosed in a 65 ft. pressure vessel which was pressurized to 120 psi during operation.  The high pressure air increased the voltage on the machine from 1 MV to 5 MV.
English: Cutaway drawing of the Westinghouse Atom Smasher, a Van de Graaff generator built in 1937 at the Westinghouse Corporation research center at Forest Hills, Pennsylvania, USA. It consists of a Van de Graaff generator which generates 5 million volts (MV) on its dome shaped electrode, which is used to accelerate charged subatomic particles through an evacuated tube parallel to the generator's charge carrying belt. Since open-air Van de Graaff machines are limited to about 1 MV by leakage of current from its electrode by arcs and corona discharge, the machine is enclosed in an onion-shaped air tank pressurized to a pressure of 120 pounds per square inch, which allows it to reach a voltage of 5 MV.
Results for the Chamber of Deputies (left) and Senate of the Republic (right) in single-member constituencies. The color corresponds to the party that won more votes in that area. Blue represents the Pole of Freedoms/Pole of Good Government, red the Alliance of Progressives, yellow the Pact for Italy, dark blue the National Alliance, black the South-Tyrolean People's Party, indigo the Southern Action League, and turquois the Aosta Valley coalition.
Esquartelado: I e IV - Mendonça: Mendonça: franchado: 1 e 4 - de verde, com banda de vermelho perfilada de ouro; II e III - de ouro, com o caracteres a negro AVE MARIA; II - Moreira: de vermelho, com nove escudetes de prata carregados com uma cruz florenciada de verde, postos 3, 3 e 3; III - Pais: de prata, nove lisonjas veiradas de azul e vermelho. Coroa de barão. Medalha; cavaleiro da Imperial Ordem de Cristo e oficial da Imperial Ordem da Rosa..
Português: Esquartelado: I e IV - Mendonça: Mendonça: franchado: 1 e 4 - de verde, com banda de vermelho perfilada de ouro; II e III - de ouro, com o caracteres a negro AVE MARIA; II - Moreira: de vermelho, com nove escudetes de prata carregados com uma cruz florenciada de verde, postos 3, 3 e 3; III - Pais: de prata, nove lisonjas veiradas de azul e vermelho. Coroa de Barão. Medalhas; cavaleiro da Imperial Ordem de Cristo e oficial da Imperial Ordem da Rosa.
Illustration of the effect of varying the Stokes number. Orange and green trajectories are for small and large Stokes numbers, respectively. Orange curve is trajectory of particle with Stokes number less than one that follows the streamlines (blue), while green curve is for a Stokes number greater than one, and so the particle does not follow the streamlines. That particle collides with one of the obstacles (brown circles) at point shown in yellow.
English: This shows the result of a Lattice Boltzmann simulation of a a fluid (air) flowing around obstacles, in two dimensions. The obstacles are discs (shown in brown), and streamlines showing the air flow are in blue; the arrows indicate the direction of flow (from bottom to top). Trajectories of two particles are shown. The orange trajectory is for a Stokes number less than one, and so the particle follows the streamlines, and curves around the obstacles. The green trajectory is for a Stokes number greater than one, and so particle does not follow the streamlines, it tends to go straight ahead. In this case it then collides with an obstacle, collision is shown in yellow.
Konung Gustav IV Adolf var Sveriges regent och ledde krigsinsatsen. Han hade stundvis sitt högkvarter på Åland, men på grund av att han höll tillbaka förstärkningarna, blev han så skarpt kritiserad av officerskåren att de under ledning av Carl Johan Adlercreutz den 13 mars 1809 avsatte honom och fängslade honom på Gripsholms slott. Han gick sedermera i landsflykt och levde på kontinenten under namnet Överste Gustavsson. Teckning av Albert Edelfelt.
Die Kommandierenden Generale der deutschen Armeekorps im Krieg von 1870/71:  I.  Edwin Freiherr v. Manteuffel. – II. Eduard Friedrich v. Fransecky. – III. Constantin v. Alvensleben. IV. Gustav v. Alvensleben. – V. Hugo Ewald v. Kirchbach. – VI. Wilhelm v. Tümpling. – VII: Heinrich Adolph v. Zastrow. – VIII. August v. Goeben. – IX. Gustav v. Manstein. – X. Constantin Bernhard v. Voigts-Rhetz. – XI. Julius v. Bose. – XII. Kronprinz Albert von Sachsen
Bild aus Seite 573 in "Die Gartenlaube". Image from page 573 of journal Die Gartenlaube, 1870. Deutsch: Bildunterschrift: „Die Befehlshaber der zwölf norddeutschen Armeecorps. Armeecorps 1: Edwin Freiherr v. Manteuffel. – A.-C. 2: Eduard Friedrich v. Fransecky. – A.-C. 3: Constantin v. Alvensleben. – A.-C. 4: Gustav v. Alvensleben. – A.-C. 5: Hugo Ewald v. Kirchbach. – A.-C. 6: Wilhelm v. Tümpling. – A.-C. 7: Heinrich Adolph v. Zastrow. – A.-C. 8: August v. Goeben. – A.-C. 9: Gustav v. Mastein. – A.-C. 10: Constantin Bernhard v. Voigts-Rhetz. – A.-C. 11: Julius v. Bose. – A.-C. 12: Kronprinz Albert von Sachsen.“ English: caption: "Die Befehlshaber der zwölf norddeutschen Armeecorps. Armeecorps 1: Edwin Freiherr v. Manteuffel. – A.-C. 2: Eduard Friedrich v. Fransecky. – A.-C. 3: Constantin v. Alvensleben. – A.-C. 4: Gustav v. Alvensleben. – A.-C. 5: Hugo Ewald v. Kirchbach. – A.-C. 6: Wilhelm v. Tümpling. – A.-C. 7: Heinrich Adolph v. Zastrow. – A.-C. 8: August v. Goeben. – A.-C. 9: Gustav v. Mastein. – A.-C. 10: Constantin Bernhard v. Voigts-Rhetz. – A.-C. 11: Julius v. Bose. – A.-C. 12: Kronprinz Albert von Sachsen."
Minnetavle ved Wernersholm i Bergen til minde om, at Bjørnstjerne Bjørnson skrev Ja, vi elsker her.
Gerhard Gran skriver: »Dette digt, som er blevet den norske nationalsang, indeholder i sterk forkortning hele Bjørnsons politiske og nationale program, hans ømme kjærlighed til fædrelandet, hans beundring for landets historie – et helt lidet 'anegalleri' til patriotismens opbyggelse, hans frihetsbegeistring, ja endogsaa hans skandinavisme er med.«[4]
Memorial for the building where Bjørnstjerne Bjørnson wrote "Ja, vi elsker", the Norwegian national hymn.
Fig. 1. Electron transfer occurs between donor (D) and acceptor (A) species separated by distance R that may be found in many forms in both condensed phases and the gas phase. Internal structure, external structure, or chance collisions provide interconnection between the species. Upon electron transfer, the structure of the local chemical environments involving D and A change, as does the polarization these species induce on any surrounding media.
English: Electron transfer between two redox centres
Plot of image density (D) vs. log exposure (H), yields a characteristic S-curve (H&D curve) for each type of film to determine its sensitivity. Changing the emulsion properties or the processing parameters will move the curve to the left or right. Changing the exposure will move along the curve, helping to determine what exposure is needed for a given film. Note the non-linear response at the far left ("toe") and right ("shoulder") of the curve.[8]