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  • The purpose of this work is to analyze the current projects of the World Energy Agency (IEA) aimed at exploring the potential for reducing the cost of producing new types of biofuels, in terms of methodology, status and first results. As a result, it was revealed that, as a methodological basis, IEA projects use a top-down approach to the analysis of primary data (top-down), the theory of learning curves for forecasting and classical project analysis. Expert surveys, meta-analysis of primary data, and sensitivity analysis of projects are used as the main research methods. The main results of the IEA projects indicate that despite the significant potential for cost reduction in the production of many types of biofuels, it is not possible to achieve price parity with traditional fuels based on hydrocarbons in the medium term. Keywords: bioenergy, cost reduction, biofuel production, project analysis. Целью настоящей работы является анализ текущих проектов Мирового Энергетического Агентства (МЭА), направленных на изучение потенциала для снижения затрат на производство новых видов биотоплива, с точки зрения методологии, статуса и первых результатов. В результате было выявлено, что как методологическую основу проекты МЭА используют нисходящий подход к анализу первичных данных (top-down), теорию кривых обучения для прогнозирования и классический проектный анализ. В качестве основных методов исследования используют экспертные опросы, мета-анализ первичных данных, анализ чувствительности проектов. Основные результаты проектов МЭА свидетельствуют о том, что несмотря на существенный потенциал снижения затрат при производстве многих видов биотоплив, достичь ценового паритета с традиционными видами топлива, основанными на углеводородах, в среднесрочной перспективе не удается. Экономический вестник ИПУ РАН, Выпуск 3 2022, Pages 45-52

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    Authors: Andreev M.V; Borovikov Yu.S; Gusev A.S.; Ruban N.Yu.; +3 Authors

    The electric power system (EPS) is a large, multi-parameter, non-linear and dynamic system. The problem of calculation of relay protection (RP) settings has become more urgent nowadays. The situation is exacerbated by the active implementation of renewable energy sources, FACTS, etc., which significantly change the “traditional” EPS and their operating modes. The problem can be solved by deep analysis of functioning of main elements of RP devices in the specific operating conditions and revision of coefficients used in settings calculation. That can be done using RPs detailed mathematical models and modern EPS simulators. The results of the analysis will make it possible to formulate a new methodology for setting up RP. That is a final goal. In the framework of solving this problem, the novel approach for developing RPs’ detailed mathematical models is formulated and theoretically proved. On the basis of this approach, mathematical models of the system “instrumental transformer - auxiliary transformer - analog filter” (measuring part of digital transformer differential protection) for different types of auxiliary current transformers (active and passive) and filters (Butterworth, Chebyshev, Bessel) are developed. A comparative numerical analysis of their frequency and phase responses is carried out, including taking into account the magnetization of instrumental current transformers. Summarizing, the theoretical and practical studies presented in the article allows formulating requirements for RPs’ detailed mathematical models, which will be used in the further research. 

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  • Ð’ данной работе представлено проектирование двухэтажного коттеджа, рассчитанного на 1 семью, с выполнением всех условий по энергоэффективности с учетом климатических особенностей района строительства. Результатами проектирования являются: 1. BIM модель проектируемого здания; 2. Теплотехнический расчет ограждающих конструкций и подбор изоляционного материала; 3. Расчет тепловой характеристики здания с учетом трансмиссионных теплопотерь; 4. Выбор рекуператора, теплового насоса и расчет зондов; 5. Расчет системы водоснабжения с учетом сбора дождевой воды; 6. Расчет и подбор солнечных батарей в качестве дополнительного источника электропитания. Настоящая работа выполнена в соответствии с нормативными документами. При написании работы активно использовались современные информационные технологии, в том числе программное обеспечение Autodesk Revit 2022, AutoCAD 2022, Microsoft Word 2016, Excel 2016. This paper presents the design of a two-storey cottage designed for 1 family, with the fulfillment of all conditions for energy efficiency, taking into account the climatic features of the construction area. The design results are: 1. BIM model of the projected building; 2. Thermal engineering calculation of enclosing structures and selection of insulating material; 3. Calculation of the thermal characteristics of the building taking into account transmission heat losses; 4. Selection of recuperator, heat pump and calculation of probes; 5. Calculation of the water supply system taking into account the collection of rainwater; 6. Calculation and selection of solar panels as an additional power source. This work was carried out in accordance with regulatory documents. While writing the work, modern information technologies were actively used, including Autodesk Revit 2022, Autocad 2022, Microsoft Word 2016, Excel 2016 software.

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  • Ключевые технологии, позволяющие реализовать надёжный котёл суперсверхкритического давления (ССКД), описаны на основе исследований и разработок начиная с 1980-х годов, с акцентом на пять аспектов, таких как применение ферритных сталей с повышенным пределом ползучести (ФСПП), подавление высокотемпературной коррозии, контроль качества воды, разработка экранов водяного испарителя и использования экологически благоприятного оборудования. В частности, необходим осознанный подход к применению стали ФСПП. The key technologies which enable the realization of reliable USC boiler are described, based on the research and development activities since 1980s, focusing on five issues, such as to manage creep strength enhanced ferritic steel (CSEF), to suppress high temperature corrosion, to control water quality, to design water wall evaporator and to adopt environmentally friendly equipment. Particularly, deliberate approach to apply CSEF steel is highly desirable. №5(1054) (2019)

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  • Несмотря на поддержку технологий микрогенерации энергии со стороны правительства России, потребительский интерес к микрогенерации остается низким. В этой статье анализируется текущее понимание мотивов и барьеров, влияющих на внедрение микрогенерации, а также изучаются возможности устранения или минимизации барьеров. Результаты проведенного исследования предложений на рынке оборудования и услуг в сфере микрогенерации свидетельствуют о том, что принятие нового закона, позволяющего продавать излишки в сеть, не увеличили существенно спрос среди домохозяйств и предприятий малого бизнеса, так как данные меры государственной политики не учитывают в достаточной мере наиболее серьезное препятствие – высокие капитальные затраты и большой срок окупаемости. Экологическая польза пока что не является настолько значимой мотивацией, чтобы потребители были готовы платить за это дополнительно. Despite support from the Russian government to stimulate the introduction of microgeneration technologies, consumer interest remains low. This article analyzes the current understanding of the motivations and barriers affecting the adoption of microgeneration in order to identify opportunities for improved adoption. The findings show that the adoption of a new law allowing the sale of surplus to the network did not significantly increase demand among households and small businesses. Public policy measures do not adequately take into account the most serious obstacle as capital costs and long payback periods. The environmental benefit may seem like a strong motivation for installation, but consumers are not willing to pay extra for it. Экономический вестник ИПУ РАН, Выпуск 1 (7) 2022, Pages 89-101

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  • В статье исследован мировой опыт проектирования зданий с применением технологий «зеленого» строительства. Сегодня имеет место рост негативных антропогенных воздействий на природу, что ставить перед мировой общественностью вопрос о том, каким образом необходимо решать проблемы, возникающие при взаимодействии природы и человека, в том числе, в условиях развития цифровизации и обеспечения цифровой безопасности. Среди таких проблем особое место отводится программе энергосбережения. Указанная проблема является новой, её поднимали специалисты ещё в конце XX века. В качестве актуальной также следует назвать проблему экологического кризиса. Значительно ухудшает экологическое состояние, наряду с другими факторами, и архитектура. К процессам возведения и эксплуатации зданий становится источником выбросов в окружающую среду значительного количества вредных веществ. The article explores the world experience in the design of buildings using green building technologies. Today there is an increase in negative anthropogenic impacts on nature, which poses to the world community the question of how to solve problems arising from the interaction of nature and man, including in the context of the development of digitalization and digital security. Among such problems, a special place is given to the energy conservation program. This problem is new, it was raised by experts at the end of the 20th century. The problem of the environmental crisis should also be called relevant. Significantly worsens the ecological state, along with other factors, and architecture. By the processes of construction and operation of buildings, it becomes a source of significant amounts of harmful substances into the environment.

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  • The article describes the features of the technical implementation of intellectual energysaving control systems of various energyintensive multidimensional and onedimensional dynamic industrial objects. As an example, the variants of implementation of control systems of a multisection conveyor electric furnace, a rotary rubber mixer, a group of chamber electric furnaces and an electric water heater on the basis of various microcontrollers are considered. В статье рассмотрены особенности технической реализации интеллектуальных систем энергосберегающего управления различными энергоемкими многомерными и одномерными динамическими промышленными объектами. В качестве примера рассмотрены варианты реализации систем управления многосекционной конвейерной электрической печью, роторным резиносмесителем, группой камерных электропечей и электрическим водонагревателем на базе различных микроконтроллеров. №12 (2019)

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  • Ð’ данной работе рассматривается перспективность создания микротурбинных установок (МТУ) с внешним подводом тепла для предприятий альтернативной энергетики. Основной отличительной особенностью данной установки является наличие двух пластинчато-ребристых теплообменников. This paper discusses the potential of creating microturbine units with external heat supply for alternative energy enterprises. The main distinctive feature of this installation is the presence of two plate-ribbed heat exchangers.

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    Authors: Belik, I. S.; Starodubets, N. V.; Yachmeneva, A. I.;

    One of the important problems of the environmental economics is the development of methodology for quantifying the assimilative capacity (AC) of a territory. The article analyzes the existing approaches to determining and assessing the AC of a territory. We justify the advantages of using the energy approach. The authors' method consists in using the maximum permissible energy load (MPEL) for quantitative assessment of the AC of a territory. MPEL is a value that the ecological and economic system can withstand for a long time without changing its properties. We determine MPEL on the basis of data on the ability of various categories of land to absorb greenhouse gases (GHG), as well as the specific GHG emissions per ton of conventional fuel. Further, we compare the calculated value of MPEL in fuel equivalents with the actual consumption of fuel resources for the needs of the national economy. These values ratio can serve as a standard for measuring and balancing the environmental and economic system. The authors have validated the described method on the example of the Sverdlovsk region, which is characterized by a high level of man's impact. Calculations show that the actual consumption of fossil fuels in the region exceeds MPEL. That indicates an imbalance in the ecological and economic system and may lead to further deterioration of the environmental quality in the region. The proposed methodological approach and calculations can be used when developing strategic planning documents for a territory, including its energy strategy. Рассмотрены существующие подходы к определению и оценке ассимиляционного потенциала территории. Предложен методический подход, особенностью, которого является применение для количественной оценки ассимиляционного потенциала территории предельно допустимой энергетической нагрузки, которую может на протяжении длительного времени переносить эколого-экономическая система без нарушения своих основных свойств. Апробация методики расчета предельно-допустимой энергетической нагрузки проведена на примере Свердловской области, территория которой подвергается высокому антропогенному воздействию.

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    Authors: V.P. Kravchenko; V.S. Kirov; M.P. Galatsan;

    The analysis of the world electric-energy balance revealed the advantage of steam turbine plants. An increase in their efficiency through the improvement of the initial parameters runs into difficulties associated with creation of new materials. The efficiency increase that results from the final pressure reduction requires an improvement of the circulating water supply system. The aim of this work is to determine the effect of the water-cooling tower on the electric power station profitability. This goal was reached by the creation of a mathematical model of the water-cooling tower and turbine plant with a condenser connected to each other. The calculations were made for two types of cooling tower fill packing: asbestos cement sheets and mesh elements made of polyethylene. Further, according to it, the vapor condensation temperature was determined. The latter affects the vapor discharge in the condenser, the capacity of the turbine plant and the temperature of the cooling water at the condenser output, i.e. at the cooling tower input. The novelty of this work consisted of consideration of the interaction between the cooling tower and turbine plant. Significance of the obtained results lies in the fact that, taking into account the reciprocal influence of the turbine plant and cooling tower, the efficiency of the fill packing replacement turns out to be major comparatively to the case without considering this influence. The replacement of the fill packings the half-a-year average temperature of condensation will become lower by 2.34 °С, electricity production increases by 41.72 GWh.

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  • The purpose of this work is to analyze the current projects of the World Energy Agency (IEA) aimed at exploring the potential for reducing the cost of producing new types of biofuels, in terms of methodology, status and first results. As a result, it was revealed that, as a methodological basis, IEA projects use a top-down approach to the analysis of primary data (top-down), the theory of learning curves for forecasting and classical project analysis. Expert surveys, meta-analysis of primary data, and sensitivity analysis of projects are used as the main research methods. The main results of the IEA projects indicate that despite the significant potential for cost reduction in the production of many types of biofuels, it is not possible to achieve price parity with traditional fuels based on hydrocarbons in the medium term. Keywords: bioenergy, cost reduction, biofuel production, project analysis. Целью настоящей работы является анализ текущих проектов Мирового Энергетического Агентства (МЭА), направленных на изучение потенциала для снижения затрат на производство новых видов биотоплива, с точки зрения методологии, статуса и первых результатов. В результате было выявлено, что как методологическую основу проекты МЭА используют нисходящий подход к анализу первичных данных (top-down), теорию кривых обучения для прогнозирования и классический проектный анализ. В качестве основных методов исследования используют экспертные опросы, мета-анализ первичных данных, анализ чувствительности проектов. Основные результаты проектов МЭА свидетельствуют о том, что несмотря на существенный потенциал снижения затрат при производстве многих видов биотоплив, достичь ценового паритета с традиционными видами топлива, основанными на углеводородах, в среднесрочной перспективе не удается. Экономический вестник ИПУ РАН, Выпуск 3 2022, Pages 45-52

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Andreev M.V; Borovikov Yu.S; Gusev A.S.; Ruban N.Yu.; +3 Authors

    The electric power system (EPS) is a large, multi-parameter, non-linear and dynamic system. The problem of calculation of relay protection (RP) settings has become more urgent nowadays. The situation is exacerbated by the active implementation of renewable energy sources, FACTS, etc., which significantly change the “traditional” EPS and their operating modes. The problem can be solved by deep analysis of functioning of main elements of RP devices in the specific operating conditions and revision of coefficients used in settings calculation. That can be done using RPs detailed mathematical models and modern EPS simulators. The results of the analysis will make it possible to formulate a new methodology for setting up RP. That is a final goal. In the framework of solving this problem, the novel approach for developing RPs’ detailed mathematical models is formulated and theoretically proved. On the basis of this approach, mathematical models of the system “instrumental transformer - auxiliary transformer - analog filter” (measuring part of digital transformer differential protection) for different types of auxiliary current transformers (active and passive) and filters (Butterworth, Chebyshev, Bessel) are developed. A comparative numerical analysis of their frequency and phase responses is carried out, including taking into account the magnetization of instrumental current transformers. Summarizing, the theoretical and practical studies presented in the article allows formulating requirements for RPs’ detailed mathematical models, which will be used in the further research. 

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  • Ð’ данной работе представлено проектирование двухэтажного коттеджа, рассчитанного на 1 семью, с выполнением всех условий по энергоэффективности с учетом климатических особенностей района строительства. Результатами проектирования являются: 1. BIM модель проектируемого здания; 2. Теплотехнический расчет ограждающих конструкций и подбор изоляционного материала; 3. Расчет тепловой характеристики здания с учетом трансмиссионных теплопотерь; 4. Выбор рекуператора, теплового насоса и расчет зондов; 5. Расчет системы водоснабжения с учетом сбора дождевой воды; 6. Расчет и подбор солнечных батарей в качестве дополнительного источника электропитания. Настоящая работа выполнена в соответствии с нормативными документами. При написании работы активно использовались современные информационные технологии, в том числе программное обеспечение Autodesk Revit 2022, AutoCAD 2022, Microsoft Word 2016, Excel 2016. This paper presents the design of a two-storey cottage designed for 1 family, with the fulfillment of all conditions for energy efficiency, taking into account the climatic features of the construction area. The design results are: 1. BIM model of the projected building; 2. Thermal engineering calculation of enclosing structures and selection of insulating material; 3. Calculation of the thermal characteristics of the building taking into account transmission heat losses; 4. Selection of recuperator, heat pump and calculation of probes; 5. Calculation of the water supply system taking into account the collection of rainwater; 6. Calculation and selection of solar panels as an additional power source. This work was carried out in accordance with regulatory documents. While writing the work, modern information technologies were actively used, including Autodesk Revit 2022, Autocad 2022, Microsoft Word 2016, Excel 2016 software.

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  • Ключевые технологии, позволяющие реализовать надёжный котёл суперсверхкритического давления (ССКД), описаны на основе исследований и разработок начиная с 1980-х годов, с акцентом на пять аспектов, таких как применение ферритных сталей с повышенным пределом ползучести (ФСПП), подавление высокотемпературной коррозии, контроль качества воды, разработка экранов водяного испарителя и использования экологически благоприятного оборудования. В частности, необходим осознанный подход к применению стали ФСПП. The key technologies which enable the realization of reliable USC boiler are described, based on the research and development activities since 1980s, focusing on five issues, such as to manage creep strength enhanced ferritic steel (CSEF), to suppress high temperature corrosion, to control water quality, to design water wall evaporator and to adopt environmentally friendly equipment. Particularly, deliberate approach to apply CSEF steel is highly desirable. №5(1054) (2019)

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  • Несмотря на поддержку технологий микрогенерации энергии со стороны правительства России, потребительский интерес к микрогенерации остается низким. В этой статье анализируется текущее понимание мотивов и барьеров, влияющих на внедрение микрогенерации, а также изучаются возможности устранения или минимизации барьеров. Результаты проведенного исследования предложений на рынке оборудования и услуг в сфере микрогенерации свидетельствуют о том, что принятие нового закона, позволяющего продавать излишки в сеть, не увеличили существенно спрос среди домохозяйств и предприятий малого бизнеса, так как данные меры государственной политики не учитывают в достаточной мере наиболее серьезное препятствие – высокие капитальные затраты и большой срок окупаемости. Экологическая польза пока что не является настолько значимой мотивацией, чтобы потребители были готовы платить за это дополнительно. Despite support from the Russian government to stimulate the introduction of microgeneration technologies, consumer interest remains low. This article analyzes the current understanding of the motivations and barriers affecting the adoption of microgeneration in order to identify opportunities for improved adoption. The findings show that the adoption of a new law allowing the sale of surplus to the network did not significantly increase demand among households and small businesses. Public policy measures do not adequately take into account the most serious obstacle as capital costs and long payback periods. The environmental benefit may seem like a strong motivation for installation, but consumers are not willing to pay extra for it. Экономический вестник ИПУ РАН, Выпуск 1 (7) 2022, Pages 89-101

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  • В статье исследован мировой опыт проектирования зданий с применением технологий «зеленого» строительства. Сегодня имеет место рост негативных антропогенных воздействий на природу, что ставить перед мировой общественностью вопрос о том, каким образом необходимо решать проблемы, возникающие при взаимодействии природы и человека, в том числе, в условиях развития цифровизации и обеспечения цифровой безопасности. Среди таких проблем особое место отводится программе энергосбережения. Указанная проблема является новой, её поднимали специалисты ещё в конце XX века. В качестве актуальной также следует назвать проблему экологического кризиса. Значительно ухудшает экологическое состояние, наряду с другими факторами, и архитектура. К процессам возведения и эксплуатации зданий становится источником выбросов в окружающую среду значительного количества вредных веществ. The article explores the world experience in the design of buildings using green building technologies. Today there is an increase in negative anthropogenic impacts on nature, which poses to the world community the question of how to solve problems arising from the interaction of nature and man, including in the context of the development of digitalization and digital security. Among such problems, a special place is given to the energy conservation program. This problem is new, it was raised by experts at the end of the 20th century. The problem of the environmental crisis should also be called relevant. Significantly worsens the ecological state, along with other factors, and architecture. By the processes of construction and operation of buildings, it becomes a source of significant amounts of harmful substances into the environment.

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  • The article describes the features of the technical implementation of intellectual energysaving control systems of various energyintensive multidimensional and onedimensional dynamic industrial objects. As an example, the variants of implementation of control systems of a multisection conveyor electric furnace, a rotary rubber mixer, a group of chamber electric furnaces and an electric water heater on the basis of various microcontrollers are considered. В статье рассмотрены особенности технической реализации интеллектуальных систем энергосберегающего управления различными энергоемкими многомерными и одномерными динамическими промышленными объектами. В качестве примера рассмотрены варианты реализации систем управления многосекционной конвейерной электрической печью, роторным резиносмесителем, группой камерных электропечей и электрическим водонагревателем на базе различных микроконтроллеров. №12 (2019)

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  • Ð’ данной работе рассматривается перспективность создания микротурбинных установок (МТУ) с внешним подводом тепла для предприятий альтернативной энергетики. Основной отличительной особенностью данной установки является наличие двух пластинчато-ребристых теплообменников. This paper discusses the potential of creating microturbine units with external heat supply for alternative energy enterprises. The main distinctive feature of this installation is the presence of two plate-ribbed heat exchangers.

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    Authors: Belik, I. S.; Starodubets, N. V.; Yachmeneva, A. I.;

    One of the important problems of the environmental economics is the development of methodology for quantifying the assimilative capacity (AC) of a territory. The article analyzes the existing approaches to determining and assessing the AC of a territory. We justify the advantages of using the energy approach. The authors' method consists in using the maximum permissible energy load (MPEL) for quantitative assessment of the AC of a territory. MPEL is a value that the ecological and economic system can withstand for a long time without changing its properties. We determine MPEL on the basis of data on the ability of various categories of land to absorb greenhouse gases (GHG), as well as the specific GHG emissions per ton of conventional fuel. Further, we compare the calculated value of MPEL in fuel equivalents with the actual consumption of fuel resources for the needs of the national economy. These values ratio can serve as a standard for measuring and balancing the environmental and economic system. The authors have validated the described method on the example of the Sverdlovsk region, which is characterized by a high level of man's impact. Calculations show that the actual consumption of fossil fuels in the region exceeds MPEL. That indicates an imbalance in the ecological and economic system and may lead to further deterioration of the environmental quality in the region. The proposed methodological approach and calculations can be used when developing strategic planning documents for a territory, including its energy strategy. Рассмотрены существующие подходы к определению и оценке ассимиляционного потенциала территории. Предложен методический подход, особенностью, которого является применение для количественной оценки ассимиляционного потенциала территории предельно допустимой энергетической нагрузки, которую может на протяжении длительного времени переносить эколого-экономическая система без нарушения своих основных свойств. Апробация методики расчета предельно-допустимой энергетической нагрузки проведена на примере Свердловской области, территория которой подвергается высокому антропогенному воздействию.

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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Institutional reposi...arrow_drop_down
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    Authors: V.P. Kravchenko; V.S. Kirov; M.P. Galatsan;

    The analysis of the world electric-energy balance revealed the advantage of steam turbine plants. An increase in their efficiency through the improvement of the initial parameters runs into difficulties associated with creation of new materials. The efficiency increase that results from the final pressure reduction requires an improvement of the circulating water supply system. The aim of this work is to determine the effect of the water-cooling tower on the electric power station profitability. This goal was reached by the creation of a mathematical model of the water-cooling tower and turbine plant with a condenser connected to each other. The calculations were made for two types of cooling tower fill packing: asbestos cement sheets and mesh elements made of polyethylene. Further, according to it, the vapor condensation temperature was determined. The latter affects the vapor discharge in the condenser, the capacity of the turbine plant and the temperature of the cooling water at the condenser output, i.e. at the cooling tower input. The novelty of this work consisted of consideration of the interaction between the cooling tower and turbine plant. Significance of the obtained results lies in the fact that, taking into account the reciprocal influence of the turbine plant and cooling tower, the efficiency of the fill packing replacement turns out to be major comparatively to the case without considering this influence. The replacement of the fill packings the half-a-year average temperature of condensation will become lower by 2.34 °С, electricity production increases by 41.72 GWh.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ ZENODOarrow_drop_down
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ ZENODOarrow_drop_down
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