11 results on '"CRISTEA, Oana-Diana"'
Search Results
2. INNOVATIVE METHODS FOR SPECIFIC APPLICATIONS AGAINST LATE SPRING FROST AFFECTING FRUIT TREES.
- Author
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COMAN, Mihai, CRISTEA, Oana-Diana, MURARU, Sebastian, MURARU-IONEL, Cornelia, MURARU, Vergil, and MARIN, Eugen
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FROST , *FRUIT trees , *ATMOSPHERIC temperature , *TREE farms , *SOIL temperature , *SOIL air - Abstract
The paper presents one of the important objectives approached by the IND-AGRO-POL Cluster Association on providing technical advice to the fruit- growing farmers by addressing innovative methods for specific applications against fruit trees late spring frosts. The paper presents briefly and easily understandable the current state of knowledge regarding the protection against frosts of fruit tree plantations, offering practical advice for optimal planning according to the working conditions of the Romanian fruit tree farms that lead to reducing the consequences and combating the frosts by reducing the radiative cooling, destructing the thermal inversion layer from the soil, homogenizing the air temperature in the microclimatic layer and consequently, maintaining the air temperature on the soil surface above 0°C. [ABSTRACT FROM AUTHOR]
- Published
- 2020
3. Research on methods, techniques and technologies of carbon sequestration in soil.
- Author
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Cristea, Oana Diana, Vlăduţ, Valentin, Ungureanu, Nicoleta, Popa, Diana Lorena, Isticioaia, Simona, Dumitrescu, Liliana, Matei, Gheorghe, and Apostol, Livia
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CARBON sequestration , *CARBON in soils , *BIOGEOCHEMICAL cycles , *ENVIRONMENTAL soil science , *CLIMATE change , *VEGETATION & climate , *FOOD security - Abstract
Soil is one of the natural reservoirs of the carbon biogeochemical cycle, incorporating approximately 6000 billion tons of carbon. Given that with the industrial development more and more carbon is emitted into the atmosphere, solutions, technologies and methods are being sought to reduce this carbon or, where appropriate, it is not eliminated into the atmosphere. The purpose of this paper is to study and identify the simplest methods to be applied in agriculture, for soil processing, by identifying the techniques, technologies and equipment to achieve this without turning the furrow, so that the carbon incorporated in the soil by plants remains sequestered there. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
4. OPEN INNOVATION IN AGRO-FOOD CLUSTERS IN ROMANIA.
- Author
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Muraru, Vergil-Marian, Cristea, Oana Diana, Muraru, Sebastian Lucian, Dulgheru, Ana, and Berevoianu, Bogdan
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OPEN innovation , *FOOD industry , *AGRICULTURAL economics , *NEW product development - Abstract
Open innovation is a new paradigm for the development of agribusiness in Romania and the Danube macro-region. Studies on agro-food chains and clusters are still scarce. In the Romanian agro-food sector, 7 regional and cross-regional clusters are very active. This study aims to present the state of the art on open innovation in agribusiness in Romania, identifying how it is adopted, the role of clusters and the factors that influence this process, a collaborative platform for agro-food clusters and their members and future research possibilities. Is a need for internal organizational changes, the support of communication tools and an intellectual property model that encourage knowledge sharing. The main obstacles to the implementation of the digitization process in the agro-food sector are lack of expertise, high costs or in compatibility with the field of activity. Open innovation is a field that needs to be explored in different links in the chain, clusters being facilitators of this process. The challenges of agribusiness today demand more complex and systemic innovations that can be achieved through more open processes of product development. Clusters from agro-food sector are increasingly opening their innovation processes, streamlining their research and development activities with the expectation of better results. In general, the main barrier in establishing innovation alliances refers to the inherent risk of knowledge sharing, which creates a lack of trust between partners. The study could be a good practice model for other countries from the Danube macro-region. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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5. CONSIDERATIONS ON THE IMPORTANCE OF THE CONDITIONING OF INDUSTRIAL HEMP SEEDS.
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BRĂCĂCESCU, Carmen, NEDELCU, Ancuta, CRISTEA, Oana--Diana, and ZAICA, Ana
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SEEDS , *CROP quality , *HEMP , *MANUFACTURING processes , *CULTURAL values - Abstract
Hemp (Cannabis sativa L) is a plant whose use is expanding in countless industries. Given that there are many facilities to purchase hemp now, it is important for growers to produce the best quality product for processing. In this article, different conditioning solutions (cleaning, sorting and storage) and technical equipment are analysed in order to obtain high quality seed material or raw materials for industrial hemp processing. The quality of a crop, as well as of the products obtained after processing, crucially depends on maintaining a favourable climate during the storage period, maintaining the physical and chemical properties of the seeds resulting from the harvest. Noncompliance with the rules cancel the good practices applied by farmers during each stage prior to this time. Seed damage is associated with genotype, history and physical and chemical compositions. Hemp seed can be dried to a low moisture content and stored at low temperature for several years. In order to process, store and capitalize the seeds for sowing, immediately after harvest, must be maintained the properties of biological value, of improvement and maintenance of those of cultural value, of carrying out appropriate treatments against diseases and pests, of packaging and labelling the seeds according to destination and the provisions of the regulations in force, to periodically analyse the seeds in accredited laboratories and to deliver or use them only on the basis of quality certificates or analysis bulletins. [ABSTRACT FROM AUTHOR]
- Published
- 2022
6. INNOVATIVE AND CROSS-SECTORAL CLUSTERS AS FACILITATORS OF VALUE ADDED CHAINS IN AGRICULTURE - SMART AGRO CLUSTERS IN ROMANIA.
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MURARU-IONEL, Cornelia, MURARU, Sebastian Lucian, CRISTEA, Oana-Diana, and CONDRUZ, Paula
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VALUE chains , *MANUFACTURING processes , *ECONOMIC sectors , *ORIGINALITY , *JOB creation - Abstract
Clusters play an important role in driving competitiveness, innovation and jobs creation in the EU. Romania currently has successful clusters in various economic sectors and services, including 7 clusters in agro-food. Agriculture has been and remains the support of the human existence, which is an important pillar of the Romanian rural economy. The agro-food sector had oscillating evolutions in the post-accession period, mainly generated by the need to get in line with the EU requirements. Stimulating smart technology assimilation across all economic sectors including agro-food value chains, promoting enterprise growth and clusters 4.0 is critical to many EU Member States. Partnerships between countries, regions, cities and clusters are essential in the next industrial modernization process, based on innovation. Clusters 4.0 calls for development of a generation of advanced cluster policies to respond to these new industrial challenges by facilitating cross-sectoral value chains, fostering internationalization, stimulating inter-regional investment and accelerating entrepreneurship and skills in digital production, environmental production, circular economy, service innovation and creative economy. In order to be ready for the future, clusters must be geared towards creating a smart value chains, international cooperation and cross-sectoral partnerships. This research paper proposes a model as a tool for agro-clusters to become "smart", also this proposal providing information on the most important steps in the creation and development of smart agro-clusters. The used research methodology was based on analysis and synthesis of the information on the economic and social aspects of the development of the agro-food sector and of clusters in Romania. In conclusion, the authors of this paper wanted to emphasize the necessity of the development of smart agro-clusters for the future smart specialization of the regions. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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7. ESTIMATION OF THE RANDOM INTENSITY OF THE SOIL TILLAGE DRAFT FORCES IN THE SUPPORTS OF THE WORKING BODIES OF A CULTIVATOR.
- Author
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CARDEI, Petru, CONSTANTIN, Nicolae, MURARU, Vergil, PERSU, Catalin, SFIRU, Raluca, and CRISTEA, Oana-Diana
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TILLAGE , *CULTIVATORS , *MACHINE design , *MATHEMATICAL models , *SOILS - Abstract
The investigation on the unpredictability of the distribution of traction resistance forces on the working bodies of a specific type of MCLS complex cultivator is presented in the paper. The validation of the random character of the force that loads the active bodies is used to indicate the mathematical model that must be followed for the research of the soil processing system. Also, the research results elucidate some hypotheses issued in the conception and design of the machine: the more intense load for the working bodies located immediately after the tractor, the existence of working bodies that are constantly more intensively stressed and the causes. According to the literature, it is to be assumed that the forces that demand the working bodies, the supports, and the machine frame have a random nature. The conclusions of the descriptive, inferential statistical study (which do not quantify the random intensity) are explained together with the results. The experimental loads are compared to some of the most random strings to produce a quantitative estimate of the random intensity. As a result, processes that use random functions and the entirety of their approach are recommended in mathematical modelling for further research. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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8. THE PECULIARITIES OF SEEDS AND THE QUALITY OF THE GREEN MASS OF SOME NON-TRADITIONAL CROPS IN THE REPUBLIC OF MOLDOVA.
- Author
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CEREMPEI, Valerian, ȚÎȚEI, Victor, VLĂDUT, Nicolae-Valentin, and CRISTEA, Oana-Diana
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FLAX , *CROPS , *SESAME , *ANIMAL feeds , *RENEWABLE natural gas , *SEED quality , *RADISHES - Abstract
The article presents the results of the studies on the peculiarities of the seeds and the quality indices of the green mass, obtained from the non-traditional crops Amaranthus hypochondriacus, Raphanus sativus var. olifera, Sinapsis alba, Linum usitatissimum, Sesamum indicum and the hybrid Rumex tianschanicus × Rumex patientia. The results reflect the values of dimensional parameters, friability, seed structure and quality indices of the harvested green mass (nutritive value, biochemical potential to obtain biomethane). It has been demonstrated that the criterion of dimensional proportionality Kdp, used in the present research, shows the real structure of the seeds. The harvested green mass from non-traditional crops has the optimal content of protein and carbohydrates for animal feed and biomethane production. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
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9. MOBILE SYSTEM FOR THE PRODUCTION OF ELECTRICITY FROM ALTERNATIVE SOURCES (SOLAR + WIND) .
- Author
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CRISTEA, Larisa C., MATEESCU, Marinela, PREDA, Dragos, DURAN, Bogdan, and CRISTEA, Oana–Diana
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GRIDS (Cartography) , *RENEWABLE energy sources , *ELECTRICITY , *CROPS , *SHEEP ranches , *FOSSIL fuels - Abstract
The paper presents a mobile system for the production of electricity from alternative sources (solar + wind) which is intended for use in any isolated place, where there is no possibility to connect to an electricity grid, to ensure the electricity needed by various consumers in agricultural applications and agricultural crop monitoring, remote transmission and management services. At the same time, this mobile system, which is an ecological and economical electricity generator, can be used in the following locations without electricity: holiday homes, cottages, sheep farms, farms, greenhouses, caravans, bee trailers, boarding houses, monasteries, etc. The results of the research allow useful recommendations for farmers who want to use alternative energy sources in isolated farms, to reduce dependence on volatile and uncertain fossil fuel markets, especially oil and gas ones. [ABSTRACT FROM AUTHOR]
- Published
- 2022
10. Obtaining thermal energy from renewable sources in rural areas using a combined energy system.
- Author
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Dumitrescu, Liliana, Cristescu, Corneliu, Rădoi, Radu, Pavel, Ioan, Dragomir, Florian, and Cristea, Oana Diana
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SOLAR energy conversion , *BIOMASS energy , *ELECTRIC power production , *TOTAL energy systems (On-site electric power production) , *HEAT transfer , *RENEWABLE energy sources , *SOLAR panels , *HOT water heating - Abstract
The article presents an energy system solution in which the heat energy required to get domestic hot water needed for a family home is obtained by the cumulative conversion of energy from 2 renewable sources: solar energy and biomass energy. Compared to the classic variants of thermal systems, which exploit a single source and provide only partially the energy needed, the combined use consists of energy supply from one source when the other is unavailable or insufficient. In the present case, when the domestic hot water requirement is no longer covered by the solar thermal panels (consumption during the night, days without sun or temporary consumption higher than the usual one), energy from biomass is used in the same system. It is converted to thermal energy using a generator where the gasification module uses the TLUD process. In addition to a higher yield of biomass, this process allows the use of a wide range of biomass types, existing in rural areas. The article presents the results obtained from the experimentation of the system that uses 4 solar panels and a thermal energy generator with a power of approx. 10 kW. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
11. USING SPEECH RECOGNITION IN AGRICULTURE.
- Author
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CONDRUZ, PAULA, MURARU, SEBASTIAN-LUCIAN, MURARU, VERGIL, MURARU-IONEL, CORNELIA, and CRISTEA, OANA DIANA
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SPEECH perception , *AUTOMATIC speech recognition , *INTERACTIVE voice response (Telecommunication) , *HUMAN-machine systems , *NATURAL language processing , *PROGRAMMING languages - Abstract
The importance of computers has become very popular, the interaction between man and machine is indispensable every day. People's need and desire to communicate with machines naturally led to the evolution of natural language processing. While progress is being made in this area, it is likely that voice interaction systems will replace most portable and digital devices such as keyboards, card readers, etc. This paper presents the main paradigms for speaker recognition, being one of the most important and needed biometric feature and it also focuses on the use of these biometric technology for interactive voice response system for agriculture assistance to farmers. Agriculture has been the primary occupation of human being. Generally farmers do not have the scientific information or competence to find out the cause and solution of any situation that could appear as diseases of their animals or even crops, behavioral features etc. They could have difficulties with understanding machine language or even typing. To facilitate the farmer’s access to information regarding the solution of a specific kind of livestock or crops matter this paper proposes a concept of an interactive voice response system through their mobile phones; a model with voice response in many languages. This model will be advantageous in following conditions: for people with disabilities, people with few PC knowledge or even those who are very busy. Biometric recognition or, simply, biometrics refers to the automatic recognition of individuals based on their physiological and/or behavioral characteristics. The voice is a physiological feature (each person has a different vocal tract), but the recognition of a speaker is mainly based on the study of how it speaks, usually classified as behavioral. Speech recognition is a multi-application domain: security of any kind, telecommunication, daily activities, and now it could be used in agricultural situation. Speech Recognition summarizes a variety of issues such as recognizing isolated words, identifying speakers based on their voice tag, recognizing phonemes, etc. The utility of identifying people based on their voice is growing with the development of automation and telecommunication, and, also regarding the new-entry telephone line applications, the need to recognize the speaker has become more pressing. Speech recognition has a particularly high applicability due to the fact that this method is non-intrusive, universally accepted, with acceptable accuracy, and speech samples are easily sampled either by phone or by microphone. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
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