All about photo.com: photo contests, photography exhibitions, galleries, photographers, books, schools and venues.
Win a Solo Exhibition in July 2026 + An Exclusive Interview!
Win a Solo Exhibition in July 2026 + An Exclusive Interview!
Taisuke Sato
Taisuke Sato
Taisuke Sato

Taisuke Sato

Country: Japan
Birth: 1969

Taisuke was born in Nagoya, Japan in 1969.
After graduating from the Department of Sociology at Ritsumeikan University, Kyoto, Japan, he worked in housing sales and management for a major Japanese housing company. When he turned 50, he chose to spend his life exploring arts, photography and its philosophy, then turned to be a photographer.
He takes pictures in the style of street photography. They have some feelings, lonely, surreal, and humorous. He also has a unique sensitivity to the distance between society and people, and the perspective from which he views them. This is because when he was a boy, he moved every three years due to his father's job transfer.
As a result, he learned how to blend in quickly and get along with the existing community by observing closely and understanding the distance and atmosphere between people. This is because in Japan's collectivist and relationship-oriented society, it is difficult to join an existing group.
In addition, the fact that he himself is an existence that "Appears one day and disappears the next" has given him a subjective and objective perspective and thinking, but even so, in Japanese society dominated by the exclusivity of the community and "the Atmosphere of the place", his identity without a hometown or geographical ties is very uncertain and unstable.
For this reason, his works are photographed with a unique sensibility, and their atmosphere reflects his worldview.
His main theme is the relationship between himself, people, and society. In his work, he presents a methodology that takes a multifaceted view of human life and society and transforms it into a "Acceptance of impermanence".
And more, he has deep insights into social behavioral psychology, social science, mental health, social class, Japanese organizational philosophies, housing and family, which are largely reflected in his work.
 

Inspiring Portfolios

Call for Entries
AAP Magazine #59 Shapes
Publish your work in our printed magazine and win $1,000 cash prizes
 
Stay up-to-date  with call for entries, deadlines and other news about exhibitions, galleries, publications, & special events.

More Great Photographers To Discover

Philippe Halsman
Latvia/United States
1906 | † 1979
Philippe Halsman was born in Riga, Latvia and began his photographic career in Paris. In 1934 he opened a portrait studio in Montparnasse, where he photographed many well-known artists and writers — including André Gide, Marc Chagall, Le Corbusier, and André Malraux, using an innovative twin-lens reflex camera that he designed himself. Part of the great exodus of artists and intellectuals who fled the Nazis, Halsman arrived in the United States with his young family in 1940, having obtained an emergency visa through the intervention of Albert Einstein. Halsman’s prolific career in America over the next 30 years included reportage and covers for every major American magazine. These assignments brought him face-to-face with many of the century’s leading statesmen, scientists, artists and entertainers. His incisive portraits appeared on 101 covers for Life magazine, a record no other photographer could match. Part of Halsman’s success was his joie de vivre and his imagination — combined with his technological prowess. In 1945 he was elected the first president of the American Society of Magazine Photographers (ASMP), where he led the fight to protect photographers’ creative and professional rights. In 1958 Halsman’s colleagues named him one of the World’s Ten Greatest Photographers. From 1971 to 1976 he taught a seminar at The New School entitled Psychological Portraiture. Halsman began a thirty-seven-year collaboration with Salvador Dali in 1941 which resulted in a stream of unusual photographs of ideas, including Dali Atomicus and the Dali’s Mustache series. In the early 1950s, Halsman began to ask his subjects to jump for his camera at the conclusion of each sitting. These uniquely witty and energetic images have become an important part of his photographic legacy. Writing in 1972, Halsman spoke of his fascination with the human face. “Every face I see seems to hide – and sometimes fleetingly to reveal – the mystery of another human being. Capturing this revelation became the goal and passion of my life.”Source: Magnum Photos Over the course of his career, Halsman enjoyed comparing his work to that of a good psychologist who regards his subjects with special insight. With his courtly manners and European accent, Halsman also fit the popular stereotype at a time when Americans regarded psychology with fascinated skepticism. In fact, Halsman was proud of his ability to reveal the character of his sitters. As he explained, "It can't be done by pushing the person into position or arranging his head at a certain angle. It must be accomplished by provoking the victim, amusing him with jokes, lulling him with silence, or asking impertinent questions which his best friend would be afraid to voice." In the spring of 1952, Halsman put his signature technique to work when Life sent him to Hollywood to photograph Marilyn Monroe. Halsman asked Monroe to stand in a corner, and placed his camera directly in front of her. Later, he recalled that she looked "as if she had been pushed into the corner cornered with no way to escape." Then Halsman, his assistant, and Life's reporter staged a "fiery" competition for Monroe's attention. "Surrounded by three admiring men she smiled, flirted, giggled and wriggled with delight. During the hour I kept her cornered she enjoyed herself royally, and I . . . took between 40 and 50 pictures." In this widely familiar portrait, Monroe wears a white evening gown and stands with her back against two walls, one dark, the other light, her eyes half-closed and her dark, lipsticked mouth partly open. Yet Halsman deftly avoided any explicit representation of the true subject of the picture. Using the euphemistic language of the time, Halsman's assistant admired the photographer's ability to make "suggestive" pictures of beautiful women which still showed "good taste," emphasizing "expression" rather than "physical assets." And then the assistant added, "Halsman is very adept at provoking the expression he wants."Source: National Portrait Gallery
Sima Bivolarska-Stoyanova
Sima is a portrait photographer and retoucher based in Bulgaria, where she lives and works while continuously seeking inspiration through travel. With over a decade of experience in photography and more than five years working professionally, her practice is rooted in a deep interest in human presence and emotional nuance. Her work focuses on creating emotionally driven fine art portraits that exist between reality and abstraction. Guided by a strong sensitivity to light, texture, and subtle expression, she develops images that feel both intimate and cinematic. For Sima, retouching is not a corrective step but an integral part of the visual language—an extension of the image itself. Inspired primarily by people, her work explores the space between what is visible and what is felt. Rather than documenting reality, she reconstructs it through emotion, atmosphere, and quiet transformation, often blurring the line between the real and the imagined. Her work has been recognized in international photography awards, and she continues to explore the evolving relationship between photography and artificial intelligence as part of her creative practice. Statement My work explores the space between what is visible and what is felt. Through portraiture, I move beyond documentation, using light, texture, and subtle transformation to reconstruct reality as an emotional experience. My images exist in a quiet, suspended state, where presence is suggested rather than defined. Identity becomes secondary, giving way to atmosphere, gesture, and the intangible. Retouching is an essential part of my process—not as correction, but as a continuation of the image itself. It allows me to shift the work away from the literal and into a more subjective, interpretative space. At the core of my practice is an interest in what cannot be fully seen, but can still be deeply felt. Awarded Photographer of the Week - Week 15, 2026
Stefano De Luigi
I was born in Koln and spent all my life so far, between Rome, Milan and Paris. Even if we are living in a time where is not really trendy, I feel myself deeply Europeen. I choose photography to became my language, because I felt it is universal, the only filter you have to use is your own mind-eyes. Below the essential of my biography I am a photographer since 1989. I attended 2 years of courses at ISF (Instituto Superiore di Fotografia) in Rome between 1987/89 and moved, for the first time, to Paris from 1989 to 1996, working, among others for the Louvre Museum. Back and forth from France to Italy In 2000 I received the Honorable Mention of Leica Oskar Barnack Award. That same year I started the project Pornoland, a photographic journey on pornographic movie sets around the world. In 2004 Pornoland became a book enclosing 16 pages of text by English writer Martin Amis. Pornoland has been published by : Thames & Hudson, Knessebeck, La Martinière and Contrasto. This work has been exhibited at REA gallery (Paris 2004), Santa Cecilia gallery (Rome 2005), Lanificio (Naples 2006), Festival Transphotographiques (Lille 2007), New York Photo Festival (NY 2011). Personal exhibitions in these years, among others, include WHO Headquarter (Geneva 2010), VII Gallery (New York 2010), 10b Gallery (Rome 2010), Museum of Modern Art (Rovereto 2011), Photofestival (Athens 2011/15), Fondazione Stelline (Milan, 2013) FotoIstanbul (2015) , Candiani Cultural Center ( Venice 2017) Plenum Gallery ( Catania 2018) Museum of Palazzo Ducale ( Genes 2019) Image Gibellina 2021, Photolux (Lucca 2022) Planches Contact (Deauville 2022). From 2003 to 2010, I worked on Blindness-, my main work, which lasted 8 years. A photographic project on the life condition of blind and low vision people, around the world. Blindness received the patronage of Vision 2020- World Health Organisation and won the W.E. Smith Fellowship Grant in 2007. In 2006 I embarked on the project Cinema Mundi, a World Cinema exploration of the alternative cinematographic scene external to the Hollywood dream factory including China, Russia, Iran, Argentina, Nigeria, South Korea and India. Cinema Mundi has been also transformed into a 7 minutes short movie screened at Locarno International Film Festival on August 4th, 2007. I have been awarded in the World Press Photo contest four times in different categories (1998-2007-2010-2011). In 2009 the Moving Walls of Open Society Foundation exhibited my work in Washington and New York. In 2010 I was the recipient of the Days Japan International Photojournalism Award and the Getty Grant for Editorial Photography, Syngenta Prize 2015, CNC grant for the documentary"Mare Amarum" 2019, Planches Contacts grant 2021 and I was the recipient of Strategie Fotografia grant from the Italian Ministry of Culture in 2022. I published 6 books Pornoland (Contrasto 2004), Blanco, (Trolley book 2010) iDyssey, (Edition Bessard 2017) Babel with Michela Battaglia (Postcart 2018) Pornoland Redux (Self-published 2021) Il Bel Paese (L'Artiere 2023). T.I.A Africa is a continent. But Africa is also a well-defined place in my mind. Africa is unique. Every time I have had the opportunity of going there I have come face to face with incredible tragedies but also with the unwavering hope of its people. Ever since my first journey to South Africa in 1989, where I saw Walter Sisulu walk free in Soweto after years of imprisonment, I continue to be both deeply moved and deeply shocked by all the stories I have witnessed and heard. Every time I step onto African soil I know I will experience something deep, something that inevitably leads to a search for the meaning of life, something that, for me at least, surfaces from deep within when I am in Africa. The questions raised call for humbleness, since often they are without answers. We know that the truth often lies in the middle folds of things. This project aims to raise questions and provoke thoughts which could, perhaps, lead to some answers and which in turn could correspond to some truths. I have tried to conceive this project as a poem. Or perhaps it would better be described as a ballad. The ballad with verses which challenge and play with each other. In the space between two facing photographs there is a story. One of the thousand stories I witnessed in Africa, one of the thousand questions I asked myself, one of the thousand experiences I was fortunate to live. The photographs represent the two extremes of the story that links them: the beginning and the end. I couldn't find a better form of expressive language to convey how Africa is an all-encompassing experience for any human being wishing to embrace it to its full. A painful yet joyful ballad of my personal and ongoing relationship with this continent. This is why I have called it "This is Africa". I should probably have called it "This is my vision of Africa" but it didn't sound the same. By no means does this mean it is the only view of Africa. I know it may seem inadequate and subjective. But so is everything in life, I guess. So, This is Africa. Blanco How does the look of a blind person look like? Can the blind show joy, happiness, disappoint, pain, suffering, pity, regret, with the only use of their eyes? The absence of sight can mean also the absence of complicity behind the camera's lens? We always use the term blind to characterize a person, such as blond, fat, poor, rich. And maybe, in some way, it is the truth. It doesn't matter if it happens in Africa, Asia, or the old Europe. The fact is, they cannot see the light, the colors, the daily scenes, how awful or gorgeous they can be. The blind are a contrast. It is easier to ignore them, their handicap is hidden, but they do have it. It's not necessary to turn the face to something or someone else, they won't see it. They seem 'normal', but they're not. They have their own world, the same and another than ours, made of different feelings, different images, different colors. And dark.
Alexander Gronsky
Alexander Gronsky was born in 1980 in Tallinn, Estonia. He moved to Russia in 2006 and he became member of the Photographer.Ru agency in 2004. His works have been published in numerous international newspapers and magazines, such as The Sunday Times, Esquire, Le Monde 2, Vanity Fair, Spiegel, Bolshoy Gorod, Ojode Pez. He was awarded the Aperture Portfolio Prize in 2009, the Foam Paul Huf Award in 2010 and the World Press Photo 3rd place for Daily Life stories in 2012. Alexander Gronsky is represented by Agency.Photographer.Ru and Gallery.Photographer.Ru.Alexander Gronsky has joined INSTITUTE for Artist Management in 2012. About Pastoral In his photographic account Pastoral, Alexander Gronsky portrays the outskirts of Moscow: the places where humanity takes refuge to find solace far from the cities, colliding with urban expansion and frailty of nature. The space explored lives “in between”, suspended in the nothingness of the unknown and what stands “on the other side”. Gronsky is a landscape photographer with an incredibile ability to capture natural scenes with an allegorical meaning: expanses and hills, spectacular lights, broad horizons. His skilful use of perspective and his ability in composition, lead the observer’s eye deeply into the landscape, generating a sense of astonishment for every place portrayed in photo. In the images, human presence is constant, Gronsky looks for infrequent but precious moments of relief and diversion in woody areas and open beaches, in remote corners and common meeting places. Meanwhile, he always bears in mind the proximity of the big city: glimpses of skyscrapers and industrial parks can be seen in the distance between the trees or, sometimes, surprisingly close to the people “surrounded by nature”. (Source: www.contrastobooks.com)
Aaron Siskind
United States
1903 | † 1991
Aaron Siskind was born on December 4, 1903 in New York. He was the son of Russian Jewish immigrants and the fifth of six children. After receiving his Bachelor of Social Science degree from the College of the City of New York in 1926, he went on to teach high school English in the New York public school system for 21 years. His first loves were music and poetry, but he took an interest in photography after his 1929 wedding, when he received his first camera as a honeymoon present. He began his career in photography as a documentarian in the New York Photo League in 1932. From 1936 to 1940, he oversaw the League’s Feature Group as they created documentary photo essays of political importance, fueled by a desire for social change.On the invitation of Harry Callahan, Siskind joined the faculty of the Institute of Design in Chicago in 1951, taking over as head of the photography program in 1961, when Callahan left. Siskind and Callahan, famous for their synergy as teachers and photographers, reunited in 1971 when SIskind left the Institute of Design for the Rhode Island School of Design where Callahan then taught. Siskind continued to teach at RISD until his retirement in 1976. He traveled broadly, making multiple trips to Mexico and Italy, including a stint in Rome, funded by his 1966 John Simon Guggenheim Memorial Fellowship.Siskind died at age 87 in Providence, Rhode Island. The Aaron Siskind Centennial Celebration took place in 2003 and 2004, with exhibitions at more than a dozen institutions across the country, each devoted to a different period or theme of his life and work.
Alexey Titarenko
Russia/United States
1962
Alexey Titarenko is a Russian-born photographer and visual artist best known for his black-and-white photos that investigate the link between time, location, and memory. He was born in Leningrad (now Saint Petersburg) in 1962 and grew up in the Soviet Union during a period of rapid political and cultural change. Before pursuing photography as a fine art form, Titarenko studied journalism at Leningrad State University and worked as a writer and photographer for a local newspaper. He was drawn to photography because of its ability to record and preserve moments in time, as well as reveal the nuances of the world around us. In the early 1990s, Alexey Titarenko moved to the United States and continued to develop his unique style of photography. He is best known for his series The City is a Novel, which was created in the early 1990s and was inspired by the architecture, history, and atmosphere of St. Petersburg. In these images, Titarenko employs a slow shutter speed to create a dream-like quality, blurring the movement of people and objects in the city's busy streets and squares. The result is a series of haunting and evocative images that capture the feeling of the city as well as its history and identity. Titarenko's work has been widely exhibited and published, and he has received numerous awards and accolades for his contributions to the field of photography. He has continued to explore themes of time, memory, and identity in his work, and has been particularly interested in the idea of "hauntology" – the study of the way that past experiences and events continue to influence our present and future. One of Titarenko's most significant contributions to the field of photography is his use of the technique of layering. In many of his images, he blends multiple exposures of the same scene, creating a complex and layered image that is both abstract and representational. This layering technique allows Titarenko to express his ideas about the relationship between time and memory, as well as to create images that are visually stunning and emotionally resonant. Titarenko's work has had a profound influence on the field of photography, and he is widely regarded as one of the most innovative and original photographers of his generation. His images are powerful and thought-provoking, and they invite us to contemplate the world around us in new and meaningful ways. Alexey Titarenko is a world-renowned photographer and visual artist whose work continues to inspire and enchant audiences worldwide. He has made an important contribution to the field of photography, and his photos will definitely continue to inspire and thrill future generations.
Jan Grarup
Denmark
1968
Born in Denmark in 1968. In 1991, the year he graduated, Grarup won the Danish Press Photographer of the Year award, a prize he would receive on several further occasions. In 1993, he moved to Berlin for a year, working as a freelance photographer for Danish newspapers and magazines. During his career, Grarup has covered many wars and conflicts around the world including the Gulf War, the Rwandan genocide, the Siege of Sarajevo and the Palestinian uprising against Israel in 2000. His coverage of the conflict between Palestine and Israel gave rise to two series: The Boys of Ramallah, which also earned him the Pictures of the Year International World Understanding Award in 2002, followed by The Boys from Hebron. His book, Shadowland (2006), presents his work during the 12 years he spent in Kashmir, Sierra Leone, Chechnya, Rwanda, Kosovo, Slovakia, Ramallah, Hebron, Iraq, Iran, and Darfur. In the words of Foto8's review, it is "intensely personal, deeply felt, and immaculately composed." His second book, Darfur: A Silent Genocide, was published in 2009. In 2017 he realised the prizewinning bestseller AND THEN THERE WAS SILENCE and he is one of the most hired keynote speakers and lectures for world issues around the word. Jan has won an incredible amount of prizes, but to mention a few he has won 8 World Press Awards, Pictures of the Year International World Understanding Award, UNICEF Children photo of the year award, Visa d'or, Leica Oskar Barnack Award, just to mention a few of the more prestigious ones Per Folkver, Picture Editor in Chief of the Copenhagen daily Politiken, where Grarup has worked, has said of Grarup that "He is concerned about what he is seeing and doing longer stories and returning to the same places." The Country that Drowned
Frieke Janssens
Belgium
1980
Over the past 25 years, Frieke Janssens has acquired a reputation as a photographer of surreal staged tableaux and group portraits, often originating in a specific concept, and almost always stemming from an inexhaustible interest in human diversity. Her series often stand out because of their confrontational nature. Notable series include, among others, Smoking Kids, Your last shot, Diana's, Animalcoholics, and recently Lightness. In the same way that an oil painter builds up a work layer by layer, she too meticulously creates each image, down to the smallest detail. In every picture we can recognise the same artistic touch, the same technical perfection, combined with a playful duality between reality and fiction. At first glance, her images attract the viewer because of their pared-down beauty. Yet once one really starts to look in earnest, one realises that there are always multiple layers of meaning. It seems as if the people portrayed are trying to tell us something. However, they are silent, and consequently have to rely on the viewers to create the story for themselves. Frieke does not adopt any particular position, but aims to convey the feeling that one is not only looking at a photograph, but at a mirror as well. As such, she leaves the viewers free in their interpretation, yet never leaves them indifferent. She sometimes lends her pared-down style to clients with whom she has a good connection, like a cultural centre, or a campaign, or a newspaper or magazine. In recent years, Frieke Janssens has exhibited in New York, Chicago, London, Hull, Bilbao and obviously also in her own country, including in Antwerp and Knokke-Heist. Her work has appeared in The Guardian, The Atlantic, Huffington Post, Knack, De Morgen, De Tijd and NRC, among others. Her book The Sweetest Taboo won gold at the 2019 Henry Van De Velde awards. In 2022, her third book Lightness was published on the occasion of the eponymous exhibition in Foto Knokke-Heist.
Advertisement
AAP Magazine #59 Shapes
Win a Solo Exhibition in July
AAP Magazine #59 Shapes

Latest Interviews

Exclusive Interview with Trevor Cole: Pastoral Peoples and Practices
For this interview, we wanted to focus specifically on The Face of the Mundari and the wider Pastoral Peoples and Practices series. We spoke with Trevor about his long-term work among the Mundari, what continues to draw him back to their cattle camps, and the experience of documenting a culture whose identity remains deeply connected to livestock, tradition, and the natural environment.
Exclusive Interview with Frank Meo
In our latest exclusive feature for All About Photo, I speak with veteran photography representative Frank Meo about what it truly takes to build a sustainable creative career today. Frank brings decades of experience working with Fortune 500 companies, major agencies, and documentary photographers to the table. We dive into the critical business skills often left out of art school curriculums, the power of mentorship, and the inspiring evolution of PROJECTIONS—his international salon platform for visual storytellers. It’s an essential read for anyone navigating the commercial or editorial photography landscape today.
Exclusive Interview with Carolyn Moore
American photographer Carolyn Moore explores the inner landscape of emotion, memory, and personal transformation through a deeply intuitive photographic practice. Her work unfolds as a quiet dialogue between artist and viewer, where images become a space for reflection, vulnerability, and connection.
Exclusive Interview with Luca Desienna and Laura Estelle Barmwoldt
For over seven years, Of Lilies and Remains has explored the depths of the goth and darkwave underground, unfolding in Leipzig—a city long associated with a vibrant and enduring subcultural scene. Moving between iconic gatherings such as Wave-Gotik-Treffen and more intimate moments on the fringes, the project offers a rare and immersive glimpse into a world often misunderstood, yet rich in expression and community. Created by Luca in collaboration with Laura Estelle Barmwoldt, the work embraces a cinematic and deeply personal approach. Rather than documenting from a distance, it moves within the scene itself, capturing its atmosphere, its codes, and its quiet contradictions. The title Of Lilies and Remains hints at this duality—where beauty and darkness, fragility and strength coexist. As the book prepares for its release, we spoke with both artists about the origins of the project, their process, and what it means to document a subculture that continues to evolve while remaining true to its spirit.
Exclusive Interview with Matthew Finley
American photographer Matthew Finley turns inward, using photography as a way to explore identity, memory, and emotional truth. Based in Los Angeles, his practice moves between performance, gesture, and found imagery, creating a visual language that is both intimate and deeply personal
Exclusive Interview with Jan Janssen
Dutch photographer Jan Janssen explores universal human experiences through his long-term project It Matters, winner of the May 2025 Solo Exhibition. Begun in 2016, the series captures intimate moments of everyday life—love, loss, connection, and belonging—across Central and Eastern Europe. Working in countries such as Turkey, Azerbaijan, and Armenia, Janssen spends extended time within communities, building relationships based on trust and respect. His approach allows him to move beyond observation, revealing deeply human and authentic moments. Rooted in travel and personal discovery, It Matters reflects Janssen’s search for what connects us all in an increasingly divided world. The project is ongoing and will culminate in a photobook scheduled for publication in 2026.
Exclusive Interview with Henk Kosche
German photographer Henk Kosche turns his lens toward the streets of Halle an der Saale, capturing everyday life in the late years of the former German Democratic Republic. At the time, Kosche was studying design and exploring the city with his camera, drawn to the atmosphere of its industrial landscape and the quiet rhythms of daily life. His series Street Photography at the End of the 80s, selected as the Solo Exhibition for July 2025, revisits a body of work created just before a period of profound change. Rediscovered decades later in a small box of 35mm negatives, these photographs offer glimpses of a city and its people at a moment suspended between the familiar and the unknown.
Exclusive Interview with Anastasia Samoylova
Anastasia Samoylova is an American artist whose photographic practice is shaped by close observation and a deep attentiveness to place. Working between documentary and formal exploration, she photographs landscapes, architecture, and everyday scenes with a sensitivity to light, structure, and atmosphere. Since relocating to Miami in 2016, her work has increasingly focused on how environments—both natural and built—carry social, cultural, and emotional traces. We asked her a few questions about her practice and her way of seeing, to better understand the thoughts and experiences that shape her work—while allowing the images themselves to remain open and speak in their own time.
Exclusive Interview with Marijn Fidder
Marijn Fidder is a Dutch documentary photographer whose work powerfully engages with current affairs and contemporary social issues. Driven by a deep sense of social justice, she uses photography to speak on behalf of the voiceless and to advocate for the rights of those who are most vulnerable. Her images have been widely published in major international outlets including National Geographic, CNN Style, NRC Handelsblad, Volkskrant, GUP New Talent, and ZEIT Magazin. Her long-term commitment to disability rights—particularly through years of work in Uganda—culminated in her acclaimed project Inclusive Nation, which earned her the title of Photographer of the Year 2025 at the All About Photo Awards. She is also the recipient of multiple prestigious honors, including awards from World Press Photo and the Global Peace Photo Award. We asked her a few questions about her life and work.
Call for Entries
Win A Solo Exhibition in July
Get International Exposure and Connect with Industry Insiders