Relevant bibliographies by topics / RDC

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'RDC'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 June 2024

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Journal articles on the topic "RDC"

1

Pioli, Rosanna N., Eligio N. Morandi, María C. Martínez, Florencia Lucca, Alejandro Tozzini, Vilma Bisaro, and H. Esteban Hopp. "Morphologic, Molecular, and Pathogenic Characterization of Diaporthe phaseolorum Variability in the Core Soybean-Producing Area of Argentina." Phytopathology® 93, no. 2 (February 2003): 136–46. http://dx.doi.org/10.1094/phyto.2003.93.2.136.

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Isolates of the Diaporthe/Phomopsis (D/P) complex were collected in the main soybean producing area of Argentina during the 1996-97, 1997-98, and 1998-99 growing seasons. Twenty-three morphologic characters related to type of colonies, stroma, pycnidia and conidia, presence of perithecia, and asci length were studied by principal component analysis (PCA). Genomic DNA were analyzed by the random amplified polymorphic DNA (RAPD) technique. From both studies, 18 isolates were identified as D/P complex and grouped in four major taxa: (i) Diaporthe phaseolorum var. meridionalis, (ii) D. phaseolorum var. caulivora, (iii) D. phaseolorum var. sojae, and (iv) Phomopsis longicolla. In addition to distinguishing interspecific and intraspecific variability, molecular markers allowed the detection of differences among isolates within the same variety. Pathogenicity was assayed in the greenhouse, by the toothpick method, inoculating the D/P isolates to soybean genotypes carrying different resistance genes (Rdc1, Rdc2, Rdc3, and Rdc4) against soybean stem canker (SSC). Pathogenic analysis distinguished two main groups: (i) the SSC-producing isolates, including D. phaseolorum var. meridionalis and D. phaseolorum var. caulivora, and (ii) the non-SSC-producing isolates, including D. phaseolorum var. sojae and P. longicolla. Cultivar RA-702 (susceptible control) was compatible with both D. phaseolorum var. meridionalis and D. phaseolorum var. caulivora isolates; meanwhile, Tracy-M (Rdc1 and Rdc 2 genes) was incompatible with D. phaseolorum var. meridionalis but compatible with D. phaseolorum var. caulivora isolates. The fact that Rdc1 and Rdc2 together (as in Tracy-M) confer an almost immune reaction to all assayed isolates of D. phaseolorum var. meridionalis but were ineffective against the D. phaseolorum var. caulivora isolates evaluated suggests that the virulence or avirulence genes in D. phaseolorum var. meridionalis and D. phaseolorum var. caulivora are different. Moreover, physiological races of D. phaseolorum var. meridionalis were detected by using differential soybean genotypes carrying distinct single Rdc genes. As far as we know, this is the first report on the existence of physiological races of D. phaseolorum var. meridionalis in South America. Selective pressure due to deployment of resistant host cultivars may have changed the frequency of the virulence or avirulence genes within the population of D. phaseolorum var. meridionalis. On the whole, our results show that pathogenic variability of D. phaseolorum in the core soybean-producing area of Argentina is higher than previously recognized.
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Kachroo, Pradeep, Aardra Kachroo, Ludmila Lapchyk, David Hildebrand, and Daniel F. Klessig. "Restoration of Defective Cross Talk in ssi2 Mutants: Role of Salicylic Acid, Jasmonic Acid, and Fatty Acids in SSI2-Mediated Signaling." Molecular Plant-Microbe Interactions® 16, no. 11 (November 2003): 1022–29. http://dx.doi.org/10.1094/mpmi.2003.16.11.1022.

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The Arabidopsis mutants ssi2 and fab2 are defective in stearoyl ACP desaturase, which causes altered salicylic acid (SA)- and jasmonic acid (JA)-mediated defense signaling. Both ssi2 and fab2 plants show spontaneous cell death, express PR genes constitutively, accumulate high levels of SA, and exhibit enhanced resistance to bacterial and oomycete pathogens. In contrast to constitutive activation of the SA pathway, ssi2 and fab2 plants are repressed in JA-mediated induction of the PDF1.2 gene, which suggests that the SSI2-mediated signaling pathway modulates cross talk between the SA and JA pathways. In this study, we have characterized two recessive nonallelic mutants in the ssi2 background, designated as rdc (restorer of defective cross talk) 2 and rdc8. Both ssi2 rdc mutants are suppressed in constitutive SA signaling, show basal level expression of PR-1 gene, and induce high levels of PDF1.2 in response to exogenous application of JA. Interestingly, while the rdc8 mutation completely abolishes spontaneous cell death in ssi2 rdc8 plants, the ssi2 rdc2 plants continue to show some albeit reduced cell death. Fatty acid (FA) analysis showed a reduction in 16:3 levels in ssi2 rdc8 plants, which suggests that this mutation may limit the flux of FAs into the pro-karyotic pathway of glycerolipid biosynthesis. Both rdc2 and rdc8 continue to accumulate high levels of 18:0, which suggests that 18:0 levels were responsible for neither constitutive SA signaling nor repression of JA-induced expression of the PDF1.2 gene in ssi2 plants. We also analyzed SA and JA responses of the fab2-derived shs1 mutant, which accumulates levels of 18:0 over 50% lower than those in the fab2 plants. Even though fab2 shs1 plants were morphologically bigger than fab2 plants, they expressed PR genes constitutively, showed HR-like cell death, and accumulated elevated levels of SA. However, unlike the ssi2 rdc plants, fab2 shs1 plants were unable to induce high levels of PDF1.2 expression in response to exogenous application of JA. Together, these results show that defective cross talk in ssi2 can be restored by second site mutations and is independent of morphological size of the plants, cell death, and elevated levels of 18:0.
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Braga, Tiago Emmanuel Nunes, Alex Pereira Holanda, and Tatiana Canelhas Pignataro. "Resolução RDC-Arq Conarq." Revista Brasileira de Preservação Digital 3 (July 12, 2022): e022004. http://dx.doi.org/10.20396/rebpred.v3i00.16583.

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Introdução: Os repositórios arquivísticos digitais confiáveis buscam oferecer mecanismos para garantir a autenticidade dos objetos informacionais a partir de uma perspectiva arquivística. No Brasil a resolução 43/2015 do Conarq se encarregou de estruturar os requisitos para a implementação deste tipo de repositório e o Hipátia, modelo estruturado no âmbito do IBICT, buscou sistematizar sua implementação. Com a aproximação da publicação de uma atualização da resolução do Conarq, faz-se premente discutir quais serão os impactos no modelo atualmente proposto. Objetivo: Identificar os requisitos propostos pela nova resolução do Conarq e avaliar quais seus impactos no modelo Hipátia. Metodologia: A pesquisa se apoia no método de análise documental e possui caráter qualitativo. Ela também possui caráter exploratório, uma vez que avalia possíveis cenários a partir dos requisitos levantados. Resultados: A estrutura informacional dos requisitos presentes na resolução do Conarq foi sistematizada em quatro categorias. Estes requisitos foram analisados e suas características descritas. Ao final, foram identificados os desafios a serem superados para a sua incorporação no Hipátia. Considerações finais: O modelo Hipátia é inovador em vários sentidos, no entanto, resta claro que não é um modelo finalizado, uma vez que precisa constantemente incorporar avanços informacionais propostos pelas normas vigentes. Ao analisar a nova resolução do Conarq foi possível identificar os caminhos a serem percorridos e quais estratégias podem ser adotadas. Foi possível perceber que é possível sistematizar no modelo vigente mecanismos que permitam às instituições avançar na implementação de repositórios arquivísticos digitais confiáveis.
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Bouroubi, Sadek, and Louiza Rezkallah. "Rotating Disk Cryptosystem: RDC." Journal of Information and Optimization Sciences 41, no. 5 (November 7, 2019): 1193–205. http://dx.doi.org/10.1080/02522667.2019.1572977.

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Oshima, Katsuo. "People’s Willingness to Pay for Dental Checkups and the Associated Individual Characteristics: A Nationwide Web-Based Survey among Japanese Adults." International Journal of Environmental Research and Public Health 20, no. 5 (February 25, 2023): 4145. http://dx.doi.org/10.3390/ijerph20054145.

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This study aimed to determine the willingness-to-pay (WTP) values for dental checkups and analyze the association between the values and individual characteristics. This cross-sectional study was conducted using a nationwide web-based survey, and 3336 participants were allocated into groups that received regular dental checkups (RDC; n = 1785) and those who did not (non-RDC; n = 1551). There was a statistically significant difference in the WTP value for dental checkups between the RDC (median: 3000 yen [22.51 USD]) and non-RDC groups (2000 yen [15.01 USD]). In the RDC group, age 50–59 years, household income <2 million yen, homemaker and part-time worker employment status, and having children were significantly associated with decreased WTP values; male sex, household incomes ≥8 million yen, and tooth brushing ≥3 times daily were associated with increased WTP values. In the non-RDC group, age ≥30 years, household incomes <4 million yen, and having ≥28 teeth were significantly associated with decreased WTP values; household income ≥8 million yen was associated with increased WTP values. Conclusively, WTP values for dental checkups were lower in the non-RDC group than in the RDC group; in the non-RDC group, those with lower household income aged ≥30 years were more likely to propose lower WTP values, suggesting the need for policy intervention to improve access to RDC.
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Gonçalves, João Carlos, Raquel P. F. Guiné, Carolina Amoedo, and Paula Correia. "Customer knowledge and behavior on the use of food refrigerated display cabinets: A Portuguese case." Open Agriculture 7, no. 1 (January 1, 2022): 50–60. http://dx.doi.org/10.1515/opag-2021-0056.

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Abstract This article presents a study on customer knowledge and habits regarding the use of refrigerated display cabinets (RDC). The study was carried out on a sample of Portuguese retail stores’ customers, using a questionnaire survey available through an Internet platform. The sample consisted of 136 individuals, who voluntarily participated in the study. Questions included the characterization of the sociodemographic population involved. The questionnaire included different questions to related with RDC, namely customer knowledge about the appearance of each RDC equipment, questions to evaluate the respondents’ perception about the advantages and disadvantages related to open or glass-door closed RDC, questions to assess the participants’ habits and behavior when purchasing food products from glass-door closed RDC (frequency and duration of door open), questions to characterize the consumers’ habits on purchasing food products from RDC, and also questions to characterize the consumers’ shopping attitudes in the context of the COVID-19 pandemic, caused by SARS-CoV-2. The results seem to indicate that customers prefer closed RDC; for example, 61.8% of participants prefer products preserved in glass-door closed RDC, against 6.6% that admit to preferring products preserved in open RDC. Therefore, we can deduce that the existence of doors does not appear to be an obstacle to purchasing food products. Regarding the use of glass-door closed RDC, 80.1% of the participants say they just open the door once, and 53.7% of the costumers believe they keep the door open in the interval [4‒6 s]. This indicates that Portuguese customers are quite well informed about food safety issues and seem to follow assertive attitudes when purchasing food products from RDC. This study reinforces the benefits of replacing open RDC by closed glass-doors allowing significant energy savings.
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Lestari, Brigitta Swasti, Rasmi Rikmasari, and Setyawan Bonifacius. "Comparison of diagnosis of temporomandibular joint disorders based on RDC/TMD Axis I and DC/TMD Axis I." Indonesian Journal of Prosthodontics 2, no. 2 (December 18, 2021): 31–36. http://dx.doi.org/10.46934/ijp.v2i2.37.

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Introduction: The Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) has become the most widely used diagnostic protocol for research in temporomandibular disorders (TMD). The invalidity of RDC/ TMD in clinical application causes the revision of RDC/TMD to be the Diagnostic Criteria for Temporomandibular Disorder (DC/TMD). The purpose of this study was to determine the differences in diagnosis of TMD between RDC/ TMD examination and DC/TMD Axis I on students of Faculty of Dentistry, Padjadjaran University. Method: The type of this research was comparative survey approach using clinical examinations and questionnaires. The sample was collected from 48 people using random sampling techniques. The diagnosis of TMD was obtained by filling in the symptom questionnaire and clinical examination based on RDC/TMD Axis I and DC/TMD Axis I, which is then entered into the RDC/TMD diagnosis algorithm and DC/TMD decision tree. Results: The results showed that from 48 samples there were 36 (75%) people with the same diagnosis of RDC/TMD and DC/TMD, and 12 (25%) people with different diagnoses between RDC/TMD and DC/TMD. Conclusions: Based on the results of the study, the diagnosis of TMD based on RDC/TMD were still categorized the same as the diagnosis based on DC/TMD.
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Chen, Peiwei, Yicheng Luo, and Alexei A. Aravin. "RDC complex executes a dynamic piRNA program during Drosophila spermatogenesis to safeguard male fertility." PLOS Genetics 17, no. 9 (September 2, 2021): e1009591. http://dx.doi.org/10.1371/journal.pgen.1009591.

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piRNAs are small non-coding RNAs that guide the silencing of transposons and other targets in animal gonads. In Drosophila female germline, many piRNA source loci dubbed “piRNA clusters” lack hallmarks of active genes and exploit an alternative path for transcription, which relies on the Rhino-Deadlock-Cutoff (RDC) complex. RDC was thought to be absent in testis, so it remains to date unknown how piRNA cluster transcription is regulated in the male germline. We found that components of RDC complex are expressed in male germ cells during early spermatogenesis, from germline stem cells (GSCs) to early spermatocytes. RDC is essential for expression of dual-strand piRNA clusters and transposon silencing in testis; however, it is dispensable for expression of Y-linked Suppressor of Stellate piRNAs and therefore Stellate silencing. Despite intact Stellate repression, males lacking RDC exhibited compromised fertility accompanied by germline DNA damage and GSC loss. Thus, piRNA-guided repression is essential for normal spermatogenesis beyond Stellate silencing. While RDC associates with multiple piRNA clusters in GSCs and early spermatogonia, its localization changes in later stages as RDC concentrates on a single X-linked locus, AT-chX. Dynamic RDC localization is paralleled by changes in piRNA cluster expression, indicating that RDC executes a fluid piRNA program during different stages of spermatogenesis. These results disprove the common belief that RDC is dispensable for piRNA biogenesis in testis and uncover the unexpected, sexually dimorphic and dynamic behavior of a core piRNA pathway machinery.
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Homma, Yasuhiro, Tomonori Baba, Nobuhiko Sumiyoshi, Hironori Ochi, Hideo Kobayashi, Mikio Matsumoto, Takahito Yuasa, and Kazuo Kaneko. "Rapid Hip Osteoarthritis Development in a Patient with Anterior Acetabular Cyst with Sagittal Alignment Change." Case Reports in Orthopedics 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/523426.

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Rapidly destructive coxarthrosis (RDC) is rare and develops unusual clinical course. Recent studies suggest multiple possible mechanisms of the development of RDC. However the exact mechanism of RDC is still not clear. The difficulty of the study on RDC is attributed to its rareness and the fact that the data before the onset of RDC is normally unavailable. In this report, we presented the patient having the radiographic data before the onset who had rapid osteoarthritis (OA) development after contralateral THA, which meets the current criteria of RDC. We thought that the increased posterior tilt of the pelvis after THA reinforced the stress concentration at pre-existed anterior acetabular cyst, thereby the destruction of the cyst was occurred. As a result the rapid OA was developed. We think that there is the case of rapid osteoarthritis developing due to alternating load concentration by posterior pelvic tilt on preexisting anterior acetabular cyst such as our patient among the cases diagnosed as RDC without any identifiable etiology. The recognition of sagittal alignment changes and anterior acetabular cyst may play important role in prediction and prevention of the rapid hip osteoarthritis development similar to RDC.
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Hao, Xueli, Taeg S. Kim, and Thomas J. Braciale. "Differential Response of Respiratory Dendritic Cell Subsets to Influenza Virus Infection." Journal of Virology 82, no. 10 (March 19, 2008): 4908–19. http://dx.doi.org/10.1128/jvi.02367-07.

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ABSTRACT Dendritic cells (DC) are believed to play an important role in the initiation of innate and adaptive immune responses to infection, including respiratory tract infections, where respiratory DC (RDC) perform this role. In this report, we examined the susceptibilities of isolated murine RDC to influenza virus infection in vitro and the effect of the multiplicity of infection (MOI) on costimulatory ligand upregulation and inflammatory cytokine/chemokine production after infection. We found that the efficiency of influenza virus infection of RDC increased with increasing MOIs. Furthermore, distinct subpopulations of RDC differed in their susceptibilities to influenza virus infection and in the magnitude/tempo of costimulatory ligand expression. Additional characterization of the CD11c-positive (CD11c+) RDC revealed that the identifiable subsets of RDC differed in susceptibility to infection, with CD11c+ CD103+ DC exhibiting the greatest susceptibility, CD11c+ CD11bhi DC exhibiting intermediate susceptibility, and CD11c+ B220+ plasmacytoid DC (pDC) exhibiting the least susceptibility to infection. A companion analysis of the in vivo susceptibilities of these RDC subsets to influenza virus revealed a corresponding infection pattern. The three RDC subsets displayed different patterns of cytokine/chemokine production in response to influenza virus infection in vitro: pDC were the predominant producers of most cytokines examined, while CD103+ DC and CD11bhi DC produced elevated levels of the murine chemokine CXCL1 (KC), interleukin 12p40, and RANTES in response to influenza virus infection. Our results indicate that RDC are targets of influenza virus infection and that distinct RDC subsets differ in their susceptibilities and responses to infection.
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Dissertations / Theses on the topic "RDC"

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Geller, Alexander C. "Thermal Imaging of RDCs and the Characterization of an Operating Map for a Novel RDC Geometry." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin161368598622062.

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Zahn, Alexander R. "Characterization and Examination of Performance Parameters of a Back-pressurized RDC." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1554119639742205.

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Rubbers, Benjamin. "Congo Casino : Le monde social du capitalisme européen au Katanga (RDC)." Doctoral thesis, Universite Libre de Bruxelles, 2006. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210891.

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Les Européens (Belges, Grecs et Italiens) du Katanga, dont le nombre s’est considérablement réduit au cours de la période post-coloniale, forment aujourd’hui le groupe le plus puissant de l’économie de la région. Au vu des troubles qui ont marqué l’histoire du Congo depuis l’indépendance, pourquoi sont-ils restés sur place ?Comment ont-ils développé leurs affaires dans une économie sur le déclin, en voie de marginalisation, et dans une structure politique patrimoniale de plus en plus instable ?Et quelle est leur place au sein de la société congolaise ?Telle est la triple question de départ à laquelle tente de répondre cette thèse en abordant de façon successive, au fil des chapitres, leur parcours migratoire, leur insertion dans la société congolaise, la dynamique de leur communauté, leur rôle dans les deux plus gros secteurs de la région, et leurs rapports avec les représentants de l’Etat. Elle prend appui pour ce faire sur une recherche de terrain conduite entre 2003 et 2004.

If the number of Europeans (Belgians, Greeks and Italians) living in Katanga has considerably decreased during the post-colonial period, they represent today the most powerful entrepreneurial group of the local economy. Once considered the troubles they came across since independence, why did they remain in the Congo? How did they develop their business in a declining economy, in process of marginalization, and in a patrimonial political structure, which proves to be more and more unstable? Finally, what is their place and role in Congolese society? These are the three questions this thesis tries to give an answer. Through the chapters, it studies the migration of expatriates in Africa, their relationship with Congolese society, the dynamics of their community, their role in the two most important sectors of Katanga, and the way they interact with the agents of the State. For this purpose, it rests upon a fieldwork research led between 2003 and 2004.


Doctorat en sciences sociales, Orientation anthropologie
info:eu-repo/semantics/nonPublished
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Rubbers, Benjamin. "Congo Casino : Le monde social du capitalisme européen au Katanga (RDC)." Doctoral thesis, Paris, EHESS, 2006. http://www.theses.fr/2006EHES0227.

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Les Européens (Belges, Grecs et Italiens) du Katanga, dont le nombre s'est considérablement réduit au cours de la période post-coloniale, forment aujourd'hui le groupe le plus puissant de l'économie de la région. Au vu des troubles qui ont marqué l'histoire du Congo depuis l'indépendance, pourquoi sont-ils restés sur place? Comment ont-ils développé leurs affaires dans une économie sur le déclin, en voie de marginalisation, et dans une structure politique patrimoniale de plus en plus instable? Et quelle est leur place au sein de la société congolaise? Telle est la triple question de départ à laquelle tente de répondre cette thèse en abordant de façon successive, au fil des chapitres, leur parcours migratoire, leur insertion dans la société congolaise, la dynamique de leur communauté, leur rôle dans les deux plus gros secteurs de la région, et leurs rapports avec les représentants de l'Etat. Elle prend appui pour ce faire sur une recherche de terrain conduite entre 2003 et 2004
If the number of Europeans (Belgians, Greeks and Italians) living in Katanga has considerably decreased during the post-colonial period, they represent today the most powerful entrepreneurial group of the local economy. Once considered the troubles they came across since independence, why did they remain in the Congo? How did they develop their business in a declining economy, in process of marginalization, and in a patrimonial political structure, which proves to be more and more unstable? Finally, what is their place and role in Congolese society? These are the three questions this thesis tries to give an answer. Through the chapters, it studies the migration of expatriates in Africa, their relationship with Congolese society, the dynamics of their community, their role in the two most important sectors of Katanga, and the way they interact with the agents of the State. For this purpose, it rests upon a fieldwork research led between 2003 and 2004
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Lowe, Steven Robert. "A study of RDC-1 as a receptor for calcitonin gene-related peptide." Thesis, Queen Mary, University of London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246802.

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Nsunda, Balu Mathilde. "L'intégration sociale au Québec des immigrants de la République démocratique du Congo (RDC)." Mémoire, Université de Sherbrooke, 2004. http://savoirs.usherbrooke.ca/handle/11143/5260.

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Qu'est-ce que l'intégration? Existe-t-il des personnes intégrées et des personnes non intégrées ou mal intégrées dans la société québécoise? Sur quelles variables pouvons-nous nous baser pour déterminer le niveau d'intégration. Quel est l'impact des politiques d'immigration et d'intégration appliquées par le gouvernement du Québec en vue de promouvoir ou développer et accélérer l'intégration des immigrants d'origine congolaise? Pourquoi le cas des immigrants congolais nécessite-t-il une intervention spéciale de la part de toutes les instances décisionnelles: législatif, financiers et socioculturel? Cette étude tente d'apporter des éléments de réponse à ces questions sur la base d'une enquête qualitative auprès de quelques membres de la communauté congolaise de Montréal.
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Antoniassi, Rosemar. "Desacidificação de oleo de milho com etanol em coluna de discos rotativos (RDC)." [s.n.], 1996. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255814.

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Orientadores: Walter Esteves e Antonio Jose de Almeida Meirelles
Tese (doutorado) - Universidade Estadula de Campinas, Faculdade de Engenharia de Alimentos
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Resumo: O processo contínuo de desacidificação de óleo de milho com etanol foi realizado em um extrator de discos rotativos (RDC), com 74 cm de altura total, 31 cm de altura na região de extração e 5 cm de diâmetro interno. As condições operacionais favoráveis ao processo de desacidificação de óleo de milho no RDC utilizado foram: etanol como fase contínua e óleo como fase dispersa, seis discos na região de extração de 20% de área livre de escoamento, carga total de 40 a 70 gramas/minuto e relação óleo/solvente de 0,5/1 e 1/1. Devido à insolubilização dos fosfatídios no etanol, foi estudado um processo de pré-tratamento do óleo de milho bruto, envolvendo etapas de degomagem e branqueamento. A degomagem do óleo de milho bruto foi conduzida em diversas temperaturas, com agentes de degomagem ácidos, neutros e alcalinos. Maior remoção de fósforo ocorreu na degomagem com água à temperatura de 30°C. Quando a degomagem do óleo de milho bruto foi realizada abaixo de 30°C, independente do agente de degomagem utilizado, ocorreram degomageme winterização simultâneas. O pré-tratamento do óleo de milho bruto com até 400 ppm de fósforo, para alimentação da coluna de discos rotativos, foi realizado através de degomagem com água à temperatura de 30°C. A seguir, o óleo degomado foi tratado com 0,1% de sílica Trysil3000, sob vácuo, às temperaturas de 70 ou 80°C, por 15 minutos, seguido de branqueamento com 1 % de terra branqueadora, à temperatura de 100°C por 30 minutos. O etanol hidratado com 5,83% de água foi selecionado como solvente para o processo contínuo, com base em sua seletividade, coeficiente de distribuição e solubilidade no óleo. O processo de desacidificação do óleo de milho branqueado com conteúdo de ácidos graxos livres de 0,96 a 7,74% e etanol, foi estudado no RDC nas relações alimentação/solvente de 0,5/1 e 1/1, na faixa de temperatura de 24 a 32°C, variando-se a velocidade de agitação até 300 rpm. A eficiência do processo de desacidificação, a fração de ácidos graxos livres e diglicerídios transferida e as perdas de triglicerídios aumentaram com a velocidade de agitação. O aumento da relação óleo/solvente reduziu as perdas de triglicerídios e a transferência de diglicerídios e de ácidos graxos livres. Nas condições utilizadas, ocorreu remoção de até 80% da acidez inicial do óleo. A eficiência do processo foi de até 1,5 estágios de equilíbrio. Os resultados obtidos possibilitaram estabelecer as condições operacionais do RDC na desacidificação de óleo milho com etanol, que se revelou um processo promissor, que se caracteriza pela alta carga processada e alta eficiência.
Abstract: Deacidification of com oil with ethanol by a continuous process was conduded in a perforated rotating-disc-contador (RDC). Since the phosphatides are insoluble in ethanol, different pre-treatments were performed such as degumming and bleahing to reduce the phosphorus content. Water degumming of crude com oil was more efficient than acid degumming with citric acid, at different temperatures varying from 10 to 70°C. The degumming of high acidity com oil was more efficient when neutral degumming agents were used. Samples of oils degummed at temperatures of 30°C and below passed the Cold Test (6 hours at O°C), independently of the degumming agents used. Under these conditions, simultaneous degumming and dewaxing occurred. Therefore, a separate winterization is not necessary at these temperatures. Degummed oil was treated with 0.1 % Silica at 70 or 80°C for 15 minutes under vacuum and bleached with 1 % of bleaching earth at 100°C for 30 minutes under vacuum. The bleached oil was used in the liquid-liquid extradion. The experimental operating conditions used in this study were: temperature ¬ 24 to 32°C; rotating speed - up to 300 rpm; feed/solvent ratio - 0.5/1 and 1/1; feed and solvent flow - 20 to 50 grams/min. The specification of the column was: length of 74 cm, diameter of 5 cm and extradion zone height of 31 cm, with 6 disks with free area of 20%. Azeotropic ethanol was chosen based on its seledivity and its capacity to extrad free fatty acid and diglyceride. The free fatty acid content varied from 0.96 to 7.74% and from 0.37 to 4.68%, for bleached and refined oil, respectively. The redudion of free fatty acid and diglyceride contents depended on the feed/solvent ratio and rotation speed. The perforated rotating disc contador was efficient in the deacidification of bleached com oil with a free fatty acid content of up to 7.80%.
Doutorado
Doutor em Tecnologia de Alimentos
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Ikanga, A.-Mponga Bakand’Olinga. "Causes et conséquences des programmes d’ajustement structurel en République Démocratique du Congo (RDC)." Thesis, Paris 10, 2014. http://www.theses.fr/2014PA100035/document.

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Notre recherche a consisté a nous faire une opinion raisonnée sur les interventions des Institutions de Bretton-Woods en République Démocratique de Congo, en nous appuyant sur une analyse de long terme de l’endettement extérieur du pays, et par conséquent à la mise en œuvre des programmes des stabilisations dans les années 70 et d’ajustement structurel depuis les années 80. Cette analyse nous a permis de mettre en lumière les contraintes économiques et sociales, internes et extérieures, auxquelles le pays a dû faire face. Loin de soulager cette économie rentière, les thérapies de choc préconisées par ces Institutions ont provoqué des coûts ou effets secondaires négatifs, délibérément cherché ou non sur d’autres variables (revenu global, niveau des prix, inflation/hyperinflation…). D’autre part, elles ont eu un coût social élevé, et ont contribuées lourdement à une détérioration de la répartition des revenus entre les diverses couches sociales du pays. L’échec des programmes d’ajustement structurel étant aujourd’hui reconnu, il était devenu donc impératif d’imaginer d’autres types d’approches moins superficielles, qui puissent intégrer non-seulement l’équilibre des variables macro et/ou micro-économiques, mais aussi méso-économique ; et donc l’accent doit être désormais mis sur l’amont (discussions des politiques) et sur l’aval (mis au point des projets ou programmes). C’est ainsi que furent mis en place, depuis le milieu des années 90, les mesures d’allègement ou d’annulation de la dette extérieure. L’austérité préconisée aujourd’hui, face à la crise de la dette dans la zone euro, semble ne pas tenir compte des conséquences que les politiques d’inspiration monétariste ont entraînées partout où elles ont été mises en œuvre, et particulièrement en Afrique. Ainsi, nous-nous demandons si le Libéraux ont-ils retenu les leçons des échecs des programmes d’ajustement structurel (PAS) dans les pays ajustés. Pour ce faire, nous-nous sommes permis de proposer quelques perspectives ou voies de sortie afin d’éviter de retomber dans le cycle de la dette que la RD Congo a connut
Our research was to give us a reasoned opinion on the actions of the Bretton-Woods in DR Congo, relying on an analysis of long term external debt of the country, and therefore the implementation of programs stabilization in the 70s and structural adjustment since the 80s. This analysis allowed us to highlight the economic and social constraints, internal and external, that the country faced. Far from alleviating the rentier economy, shock therapies advocated by these institutions have caused costs or negative side effects, deliberately sought or not other variables (total income, inflation/hyperinflation…). On the other hand, they had a high social cost, and contributed heavily to the deterioration of income distribution among different social strata of the country. The failure of structural adjustment programs (SAPs) is regnized today, it has become imperative to imagine other types of less superficial approaches that can integrate not only the balance of macro variables and/or micro-economic, but also meso, and therefore the emphasis should now be placed on the upstream (policy discussion) and downstream (developed projects or programs). Thus were established since the mid 90s, the relief measures or cancellation of the external debt. The austerity advocated today, faced with the debt crisis in the euro area seems to ignore the impact that monetary policies have led to inspiration wherever they have been implemented, particularity in Africa. Thus, we ask whether we Liberals have learned from the failures of adjustment programs (SAPs) in the country originates, the former adjusted. To do this, we have allowed us to propose a few prospects or output channels to avoid failing into the cycle of debt that DR Congo has experienced so far
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Lardeux, Laurent. "De l'exil au retour : dispositifs de rapatriement et carrières migratoires des retournés congolais (RDC)." Thesis, Lyon 2, 2011. http://www.theses.fr/2011LYO20124.

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A l'interface de la sociologie des migrations et de la sociologie politique, la thèse porte sur les migrations de retour des réfugiés congolais à partir des principaux pays d'acceuil l'afrique centrale. loin d'être regardées dans une perspective linéaire et statique entre deux sédentarités mais analysées à partir d'observation in situ et d'entretiens biographiques réalisés pendant près de seize mois dans les espaces d'accueil et de retour, les migrations de retour son intégrées ici dans un espace migratoire dynamique fait d'oppositions et de transactions entre les dispositifs du flux migratoire qui organisent et réglementent les migrations de retour, et les multiples pratiques formelles et informelles du sujet dont les intenses jeux de tension s'inscrivent dans un contexte soutenu de limitation des flux migratoires et l'accroissement de nouvelles formes de mobilité dans l'espace migratoire d'afrique centrale
In the interface of the sociology of migration and political sociology, the thesis focuses on return migration of Congolese refugees from the main host countries of central Africa. Far from being observed in a linear and static perspective between two sedentarinesses but analyzed starting from in situ observations and from biographical interviews conducted during 16 months in host and return areas, the migrations of return are integrated in a dynamic migratory space constituted by oppositions and transactions between the biopolitic plans of retention of flows and the circulatory practices of the refugees. The accent is particularly focused on negotiating "biographical crossroads" and migratory careers of refugees from the social, spatial and political capital acquired during the refuge time. How, in these intersections between migratory careers and biopolitical plans, the returnees can define and negotiate their installations in the environment of return ?
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Djela, Longondjo. "Un système de pensée oublié ?La sorcellerie et ses entours chez les Tetela (RDC)." Doctoral thesis, Universite Libre de Bruxelles, 2020. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/312742.

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La recherche sur la croyance à la sorcellerie d’antan, c’est-à-dire avant la colonisation de l’Afrique subsaharienne. Le savoir de ces données survivait dans la mémoire de certains aînés qui peuvent se rappeler. Nous avons découvert que pour être sorcier (Nkangadoka) chez les Tetela, il faut être initié. On a deux types de sorciers :celui qui vit dans l’anonymat et celui qui se dévoile parce qu’il est à la fois sorcier et devin-thérapeute. Il y a la notion de personne avec les principes spirituels, quatre pour la personne ordinaire, le double, c’est-à-dire 4 x deux, pour le sorcier. Nous avons aussi découvert l’importance que les Tetela apportent à la vie post-morte, donc la réincarnation. La permanence de cette croyance jusqu’aujourd’hui malgré la métamorphose de la société (industrie, médecine, écoles, les églises de réveil…)
Doctorat en Philosophie
info:eu-repo/semantics/nonPublished
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Books on the topic "RDC"

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Katembo, Kiripi. Transit -- RDC. Bruxelles: Africalia, 2015.

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Institut national de la statistique (Congo), ed. Carte statistique de la RDC. Kinshasa: Ministère du plan, Institut national de la statistique, 2008.

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1951-, Mutunda Mwembo, ed. Justice et société en RDC. Kinshasa: Institut pour la démocratie et le leadership politique, 1999.

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Crouse, Chuck. Budd car: The RDC story. Mineola, N.Y: Weekend Chief Pub., 1990.

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Sammy, Baloji, and Kalimasi Vincent Lombume, eds. Congo Eza: Photographes de RDC. Roeselaere: Roularta Books, 2007.

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Croyances & rites des Ngbaka-Minagende,RDC. Ghent, Belgium: ReCALL Publications, Research Centre of African Languages and Literatures, 2009.

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Les institutions politiques de la RDC. Paris: Harmattan, 2010.

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Florence, Boloko Mularika, and Union nationale des femmes (Congo), eds. Femme et droits humains en RDC. Kinshasa: UNAF, 2002.

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L'ONU face à l'irrationnel en RDC. Paris: L'Harmattan, 2011.

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KASHEMA, Justin-Gr M. DROITS DE L'HOMME ENDEUILLE EN RDC. Belgique, LIEGE: EUROCEBADAC Edition Center, 2012.

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Book chapters on the topic "RDC"

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Hoeck, Casper Rønn. "Tensor Free RDC Calculations." In Solving a 3D Structural Puzzle, 177–212. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-96172-9_8.

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McCarthy, Alan, and Steve Hay. "The RDC Ten-Point Plan." In Advanced Negotiation Techniques, 61–100. Berkeley, CA: Apress, 2015. http://dx.doi.org/10.1007/978-1-4842-0850-2_7.

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Ballet, Jérôme, Benoit Lallau, and Claudine Dumbi. "The Exploitation of Sorcerer Children in Kinshasa (RDC)." In Child Exploitation in the Global South, 125–40. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91177-9_8.

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Yao, Dexu, Aimin Li, Deqi Liu, and Mengfan Cheng. "RDC-YOLOv5: Improved Safety Helmet Detection in Adverse Weather." In MultiMedia Modeling, 313–26. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-53311-2_23.

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Nyssen, Marc, Frank Verbeke, Marcel Remon, and Yannik Hallet. "Eb@le-Santé: Networked Electronic Health Records in Academic Hospitals in RDC." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 270–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-41178-6_28.

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Bonn, Gottfried. "The Impact of Real-Time on the Fault-Tolerant Distributed RDC-System." In Real Time Computing, 536–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-88049-0_39.

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Nadjeh, Nibel, Sabrina Abdellaoui, and Fahima Nader. "RDC-Repair: Towards a Relevance-Driven Approach for Data and Constraints Repair." In Lecture Notes in Computer Science, 448–68. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-55326-4_22.

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Gaur, Prerna, Bhim Singh, A. P. Mittal, and Seema Arora. "Implementation of ANFIS Controller-Based Algorithm Measuring Speed to Eliminate RDC Hardware in Resolver-Based PMSM." In Lecture Notes in Electrical Engineering, 147–59. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0665-5_12.

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Sasan, Avesta, Fadi J. Kurdahi, and Ahmed M. Eltawil. "Resizable Data Composer (RDC) Cache: A Near-Threshold Cache Tolerating Process Variation via Architectural Fault Tolerance." In Near Threshold Computing, 57–73. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-23389-5_4.

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Möller, Hans-Jürgen, and Detlev v. Zerssen. "Operationalisierte Schizophrenie-Diagnostik (DSM-III, RDC), ihre Beziehung zur traditionellen und ICD-Diagnostik und ihre prädiktive Validität." In Der Verlauf schizophrener Psychosen, 245–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-71021-6_30.

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Conference papers on the topic "RDC"

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Talukdar, Shaon, Dalton Langner, Apurav Gupta, and Ajay K. Agrawal. "Performance Characteristics of a Rotating Detonation Combustor Exiting Into a Pressurized Pleunum to Simulate Gas Turbine Inlet." In ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/gt2023-104181.

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Abstract The present study aims to experimentally characterize the performance of a rotating detonation combustion (RDC) system integrated with a pressurized downstream plenum to simulate the high-pressure inlet conditions of power generating gas turbines. A thorough understanding of the operational behavior including wave mode behavior, static pressure profile along the combustor length, and dynamic features of pressure fluctuations is crucial for successful integration of RDC with the turbine. In this study, two RDC configurations are investigated, RDC with a constant area annulus and RDC with a converging nozzle. In both cases, the RDC flow exited into a plenum chamber kept at pressures varying from 155 kPa to 330 kPa. RDC was operated on methane and oxygen-enriched air to represent reactants used in land-based power generation. Experiments were conducted for the two RDCs configurations operated at three reactant mass flow rates (0.23, 0.32, 0.46 kg/s). The RDC performance is characterized by time-averaged static pressures measurements, and wave velocity determined by ionization probes. In addition, dynamic pressure measurements were recorded both inside and near the exit of RDC channel to investigate wave interactions between RDC and downstream plenum. Results show that the RDC with the converging nozzle achieved superior performance while minimizing detrimental interactions with the reflected shock and/or acoustic waves from the downstream plenum.
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Tobias, J., D. Depperschmidt, C. Welch, R. Miller, M. Uddi, A. K. Agrawal, and Ron Daniel. "OH* Chemiluminescence Imaging of the Combustion Products From a Methane-Fueled Rotating Detonation Engine." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-77255.

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Pressure gain combustion (PGC) has been conceived to convert fuel’s chemical energy into thermal energy and mechanical energy, thereby reducing the entropy production in the process. Recent research has shown that the rotating detonation combustion or combustor (RDC) can provide excellent specific thrust, specific impulse, and pressure gain within a small volume through rapid energy release by continuous detonation in the circumferential direction. The RDC as a PGC system for power generating gas turbines in combined cycle power plants could provide significant efficiency gains. However, few past studies have employed fuels that are relevant to power generation turbines, since RDC research has focused mainly on propulsion applications. In this study, we present experimental results from RDC operated on methane and oxygen-enriched air to represent reactants used in land-based power generation. The RDC is operated at a high pressure by placing a back-pressure plate downstream of the annular combustor. Past studies have focused mainly on probe measurements inside the combustor, and thus, little information is known about the nature of the products exiting the RDC. In particular, it is unknown if chemical reactions persist outside the RDC annulus, especially if methane is used as the fuel. In this study, we apply two time-resolved optical techniques to simultaneously image the RDC products at framing rate of 30 kHz: (1) direct visual imaging to identify the overall size and extent of the plume, and (2) OH* chemiluminescence imaging to detect the reaction zones if any. Results show dynamic features of the combustion products that are consistent with the probe measurements inside the RDE. Moreover, presence of OH* in the products suggests that the oblique shock wave and reactions persist downstream of the detonation zone in the RDC.
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Bundalo, Igor, Miloš Stojić, Goran Jakupović, Nina Stojanović, Željko Aćimović, and Ninel Čukalevski. "ISKUSTVA SA PUŠTANJA U RAD SCADA/EMS SISTEMA U REGIONALNOM DISPEČERSKOM CENTRU BEOGRAD." In 35. Savetovanje Srpskog nacionalnog komiteta Međunarodnog saveta za velike električne mreže. Srpski nacionalni komitet Međunarodnog saveta za velike električne mreže CIGRE Srbija, 2023. http://dx.doi.org/10.46793/cigre35.0723b.

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This paper describes the experiences from the commissioning of the IMP VIEW4 SCADA / EMS system in the Regional Dispatch Center (RDC) Belgrade, and the emphasis is placed on the commissioning of network applications that are part of the EMS subsystem. The system configuration intended for RDC includes the following network applications: Network Topology Processor (NTP), State Estimator (SE), Bus Load Forecast (BLF), and Dispatcher Power Flow (DPF). This is the second implementation of the system in RDCs. The first implementation was performed in RDC Novi Sad, and it is planned to implement the system in the remaining RDCs (Bor, Krusevac and Valjevo). The main motive for the introduction of the new SCADA/EMS system is to provide functionality, both dynamic coloring of the elements of the power system on displays, and security analysis that did not exist in previous SCADA systems in RDCs. During the implementation of the new system in RDC Belgrade, the SCADA source database was migrated from the existing IMP VIEW2 SCADA system, which accelerated the network modeling process and significantly reduced the possibilities for error entry compared to manual input. As this database contains only topological parameters of the connection of power system elements, but not energy parameters that are necessary for the operation of network applications, a tool for importing these parameters from the application database (ABP) of the existing IMP VIEW4 SCADA / EMS system in the National dispatch center (NDC) to the appropriate ABP of the new system was developed. Using the functionality of pre-estimation analysis, which is part of the NTP, errors were identified in the model. After the elimination of these errors SE and DPF were successfully put into operation. At the moment, network applications can be used in RDC Belgrade in the study mode, and the commissioning of the SE in real time is in progress.
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Naples, Andrew, Ryan Battelle, John Hoke, and Fred Schauer. "T63 Turbine Response to Rotating Detonation Combustor Exhaust Flow." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-75534.

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This paper describes testing an axial turbine response when driven by a Rotating Detonation Combustor (RDC). A T63 (C20-250) gas turbine is modified by replacing the combustor with a RDC. The stator vanes of the T63 are heavily instrumented for measurement of flow enthalpy and pressure. The engine is run at multiple power levels with the stock combustor using JetA and hydrogen fuel. The engine is then modified to have an open loop configuration, and is run with both the RDC and the stock combustor hardware with hydrogen fuel. Temperature pattern factor, flow unsteadiness, and turbine component efficiency are measured for all setups. High speed pressure transducers show substantially higher unsteadiness generated by the RDC than the conventional combustor. RDC turbine component efficiencies are compared to the conventional combustor. Results suggest that RDC unsteadiness does not significantly impact turbine efficiency.
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5

Nemec, Mitja, and Vanja Ambrozic. "Comparison of different RDC techniques." In 2015 9th International Conference on Compatibility and Power Electronics (CPE). IEEE, 2015. http://dx.doi.org/10.1109/cpe.2015.7231104.

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Raj, Piyush, Shaon Talukdar, Dalton Langner, Apurav Gupta, Joseph Meadows, and Ajay Agrawal. "Validation of Rotating Detonation Combustor CFD for Predicting Unsteady Supersonic-Subsonic Flow Field at the Exit." In ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/gt2023-104194.

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Abstract Rotating detonation combustors (RDC) have gained increased interest for integration with power-generating gas turbines due to the potential to increase thermal efficiency. The unsteady flow field exiting the RDC is fundamentally different compared to traditional swirl-stabilized combustors. Successful integration of RDC with gas turbines will depend on the ability to properly condition the unsteady flow to achieve performance levels comparable to swirl-stabilized combustors. RDC simulations require significant computational resources due to the small spatial and temporal time scales required to resolve the detonation phenomenon. Furthermore, traditional steady-state computational fluid dynamics (CFD) analyses are not possible for RDC simulations. The present study develops and validates a computationally efficient approach for predicting unsteady flow fields exiting the combustor using 2D, transient reacting CFD with periodic boundary conditions in the combustor and a downstream plenum. Validation is performed by comparing the CFD results to various experimental measurements: i) wave speed obtained from high-speed ion probe and dynamic pressure data, ii) average wall static pressure measurements, and iii) time-resolved particle image velocimetry (PIV) at 100 kHz at the RDC exit. Results indicate good agreement between CFD and experiments with respect to velocity field exiting the RDC, detonation wave speed, and static pressure distribution.
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Bischoff, Konstantin, Sebastian Rehberg, Provence Barnouin, Eric Bach, Christian O. Paschereit, and Myles Bohon. "Effects of Increased RDC Injector Diodicity." In AIAA AVIATION 2023 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2023. http://dx.doi.org/10.2514/6.2023-4142.

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8

Welch, C., D. Depperschmidt, R. Miller, J. Tobias, M. Uddi, A. K. Agrawal, and Scott Lowe. "Experimental Analysis of Wave Propagation in a Methane-Fueled Rotating Detonation Combustor." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-77258.

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Recently, pressure gain combustion (PGC) has been a subject of intense study because of its potential to increase the thermodynamic efficiency of power generating gas turbines by several percentage points. The rotating detonation combustion/combustor (RDC) can provide large pressure gain within a small volume through rapid heat release by detonation wave(s) that propagate continuously in the circumferential direction. The RDC has been investigated mainly for propulsion applications using hydrogen fuel. In contrast, we present experimental results from an RDC operated on methane and oxygen-enriched air mixtures to represent the reactants in advanced power generating gas turbines. The propagation of detonation and oblique shock waves in the RDC is investigated through High Speed Video (HSV) imaging and Ion Probe (IP) data. HSV imaging requires optical access to the RDC, which can be difficult especially when the RDC is integrated with the gas turbine inlet hardware. Additionally, HSV systems are quite expensive. In contrast, IPs are inexpensive and have the advantages of small size and flexibility in the placement location and can be flush mounted causing minimal interference with the propagating wave. In this study, the detonation wave is tracked by high-resolution HSV imaging at framing rate of 200 kHz. At the same time, IPs are used to detect the rotating oblique shock wave inside the RDC, and different analysis techniques are explored to quantify the wave speed. IP voltage data are analyzed by differentiation, correlation and fast-Fourier transform methods to compute the wave speed (or rotation frequency), and the results are compared with those from the HSV image analysis. The uncertainty of different methods is discussed, and finally, the analysis techniques are applied to investigate the wave characteristics during an experiment.
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Strakey, Peter A., and Donald H. Ferguson. "Experimental Measurements and CFD Predictions of NOx Emissions From a Water-Cooled Rotating Detonation Engine." In ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/gt2023-100851.

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Abstract A water-cooled Rotating Detonation Combustor (RDC) operating on hydrogen and air and utilizing a pintle-style injector with an axial air flow path was operated over a wide range of mass flowrates, equivalence ratios and back-pressures producing a variety of wave modes. Measurements of NOx as well as O2 were conducted by sampling the combustor exhaust just downstream of the throat after the combustor reached a thermally steady-state condition. 2D RDC simulations were conducted with several detailed hydrogen-air chemical mechanisms along with detailed NO formation chemistry to investigate the sensitivity of the results to the chemical mechanisms as well as to derive a better understanding of where in the detonation wave NO is being formed. 3D simulations using a Large Eddy Simulation approach with a Partially Stirred Reactor model were conducted and validated against the experimental data. Wall heat losses were included and validated against global wall heat losses measured in the water-cooled RDC. While the simulations generally predicted higher NOx emissions than what was measured, the trends with equivalence ratio were well predicted. The implications of this study are that NOx emissions from RDCs are not unreasonably high and CFD can be used to predict NOx emissions as well as to optimize injector geometry. Selection of an appropriate NOx chemistry sub-model along with experimental validation is key to improving the reliability on the simulations.
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Roy, Arnab, Clinton Bedick, Donald Ferguson, Todd Sidwell, and Peter Strakey. "Investigating Instabilities in a Rotating Detonation Combustor Operating With Natural Gas-Hydrogen Fuel Blend: Effect of Air Preheat and Annulus Width." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-90938.

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Abstract Propagation characteristics of a detonation wave in an air-breathing Rotating Detonation Combustor (RDC) using natural gas-hydrogen fuel blends is presented in this paper. Short duration (∼up to 6s) experiments were performed on a 152.4mm OD uncooled RDC with two different annulus gap widths (5.08mm and 7.62mm) over a range of equivalence ratios (0.6–1.0) at varying inlet air temperatures (∼65°C-204°C) and natural gas content (up to 15%) with pre-combustion operating pressure slightly above ambient. It was observed that the RDC, with an annulus gap width of 5.08mm, was inherently unstable when natural gas (NG) was added to the hydrogen fuel while operating at pre-combustion pressures near ambient and at an inlet air temperature of 65°C. Increasing the annulus gap width to 7.62mm improved the stability of the detonation wave at similar temperatures and pressure permitting operation with as much as 5% NG by volume. While observed speeds of the detonation waves were still below theoretical values, an increase in inlet air temperature reduced the variability in wave speed. The frequency analysis thus explored in this study is an effort to quantify detonation instability in an RDC under varying operational envelope. The data presented is relevant towards developing strategies to sustain a stable detonation wave in an RDC using natural gas for land based power generation.
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Reports on the topic "RDC"

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Sandrin, F., and B. Ikati. Basic Necessities Survey dans le paysage Ituri, RDC: Établissement de la Situation Socio-économique de Base des Ménages du Paysage Ituri, RDC. Wildlife Conservation Society and FAO and CIFOR and CIRAD, 2020. http://dx.doi.org/10.19121/2020.report.49714.

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Gupta, Sweta, Gauthier Marchais, Cyril Brandt, Samuel Matabishi, Pierre Marion, Jean-Benoît Falisse, Deborah West, et al. Projet BRiCE RDC et Niger : Rapport intermédiaire Bien-être des enseignants et qualité de l’enseignement dans les contextes fragiles et affectés par les conflits. Institute of Development Studies, June 2022. http://dx.doi.org/10.19088/ids.2022.089.

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Ce rapport présente les résultats de l'étude intermédiaire du projet de recherche Building Resilience in Crises through Education (BRiCE), qui est dirigé par l'Institute of Development Studies (IDS) et l'Institut Supérieur Pédagogique de Bukavu (ISP Bukavu). Le projet de recherche fait partie du programme d'éducation BRiCE, financé par la Direction Générale des Partenariats Internationaux de la Commission Européenne et dirigé par Save the Children au Niger et en République Démocratique du Congo (RDC). Ce rapport présente les résultats de l'évaluation à mi-parcours de deux composantes du programme éducatif BRiCE : le développement professionnel des enseignants (DPE) et l'amélioration des environnements d'apprentissage ensemble (ILET). Il présente également une analyse approfondie du bien-être des enseignants et de la qualité de l'enseignement dans les régions de Zinder et Diffa au Niger, et d'Uvira et Fizi dans la province du Sud-Kivu en RDC. De manière plus spécifique, le rapport explore plusieurs facteurs clés du bien-être des enseignants : leur statut professionnel, qui structure les inégalités dans la profession d'enseignant au Niger et en RDC ; leur identité sociale, avec un accent particulier sur le genre et l'ethnicité, qui jouent un rôle important dans la vie professionnelle et sociale des enseignants ; et leur exposition à la violence, en analysant comment les conflits violents pénètrent dans l'environnement scolaire et affectent le travail des enseignants.
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Maubert, Camille, Jeremy Allouche, Irene Hamuli, Eustache Kuliumbwa Lulego, Gauthier Marchais, Ferdinand Mushi Mugumo, and Sohela Nazneen. Le pouvoir d’action des femmes et la protection humanitaire au Nord et au Sud-Kivu, RDC. Institute of Development Studies, March 2023. http://dx.doi.org/10.19088/ids.2023.015.

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Ce Working Paper analyse le rôle et les pratiques des groupes de femmes en lien avec la protection des femmes dans les provinces du Nord et du Sud-Kivu en République démocratique du Congo (RDC). En confrontant les éléments qualitatifs provenant des communautés au Congo et la littérature sur le pouvoir d’action des femmes, nous explorons les lieux, les stratégies et les répertoires utilisés par les femmes pour augmenter leur participation dans les structures de protection de la communauté.
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Briere, M. Dive Lab XLDS RDC-3 and Interspiro DP2 as Candidates for an Extreme Lightweight Diving System (Unmanned). Fort Belvoir, VA: Defense Technical Information Center, January 2006. http://dx.doi.org/10.21236/ada445089.

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Marchais, Gauthier, Sweta Gupta, and Cyril Owen Brandt. Bien-être des étudiants dans les contextes de conflit violent prolongé. Institute of Development Studies, September 2021. http://dx.doi.org/10.19088/ids.2021.061.

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Dans les contextes de conflit violent prolongé, les milieux scolaires jouent un rôle clé dans le bien-être psychologique, social et émotionnel des enfants. Les recherches menées en République démocratique du Congo (RDC) par le projet éducatif REALISE permettent de mieux comprendre comment les conflits violents pénètrent dans les écoles, les relations entre le personnel scolaire, les élèves, les parents et la communauté locale, et le rôle de l’entourage social des enfants. Elles permettent d’identifier les considérations clés pour les projets d’éducation opérant dans ces contextes et la manière dont ils peuvent soutenir au mieux le bien-être des enfants, y compris ceux qui sont extrêmement isolés ou qui subissent une marginalisation basée sur le sexe ou sur leur appartenance à une minorité.
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Marchais, Gauthier, Sweta Gupta, and Cyril Owen Brandt. Améliorer l’accès à l’éducation des filles marginalisées dans les zones de conflit. Institute of Development Studies, August 2021. http://dx.doi.org/10.19088/ids.2021.060.

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Une grande partie des enfants non scolarisés dans le monde vivent dans des zones de conflit. Un des principaux défis dans l’élimination des obstacles à l’instruction des filles marginalisées dans ces contextes réside dans la compréhension des formes multiples et croisées de la marginalisation et des changements dans leurs dynamiques au cours des conflits violents. Les recherches menées en République démocratique du Congo (RDC) dans le cadre du projet d’éducation REALISE identifient des éléments clés à prendre en compte dans les programmes d’éducation destinés aux filles marginalisées dans les zones de conflit, tels que l’éducation inclusive pour les filles et les garçons, les liens entre l’éducation et la consolidation de la paix, et les activités périscolaires favorisant les liens sociaux.
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Hunter, Janine, Lorraine van Blerk, Thomas d'Aquin Rubambura, Cold Musiwa Mubigalo, Luc Mufano, Wayne Shand, Anabelle, et al. Vie de rue dans la ville à la frontière: Des jeunes de la rue racontent leurs vies quotidiennes à Bukavu, RDC. StreetInvest, August 2022. http://dx.doi.org/10.20933/100001259.

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Bukavu, une ville située sur les rives du lac Kivu, à l'est de la République démocratique du Congo (RDC), abrite plus d'un million de personnes, dont de nombreuses personnes déplacées par la pauvreté et les conséquences des conflits armés qui continuent d'affecter l'est du Congo. Plus de 10 000 enfants et jeunes de la rue vivent ici dans des situations de rue. 19 jeunes de la rue ont aidé à créer cette carte narrative en enregistrant toutes les données visuelles et en partageant leurs histoires sur leur vie quotidienne. La carte narrative comprend 9 sections et 2 galeries montrant la vie quotidienne des enfants et des jeunes des rues à Bukavu et le travail de PEDER, partenaire de la société civile Grandir dans la rue, pour les aider. Les chapitres comprennent des détails sur la façon dont les enfants et les jeunes des rues collectent les plastiques sur les rives du lac Kivu pour les vendre, ils cuisinent et partagent de la nourriture ensemble, ou achètent dans des restaurants ou des étals. Les jeunes femmes gagnent leur vie dans le travail du sexe et s'occupent de leurs enfants et les jeunes hommes se détendent, créent des liens et espèrent gagner de l'argent supplémentaire en jouant et en pariant. La langue originale enregistrée dans les vidéos est le swahili, elle a été traduite en anglais et en français pour les deux versions de la carte. Tout le matériel visuel et contextuel a été créé par des jeunes de la rue vivant dans les rues de Bukavu, à savoir : Annabelle, Armel, Baba, Baridi, Bikulo, Cornelia, Diomo, Edouard, Francis, Georges, Ginette, Jasmine, Nicaise, Noah, Remi, Royal, Yvette and Zachary.
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Marivoet, Wim, John M. Ulimwengu, David M. Bugeme, Blandine Sanginga, and Sarah Thontwa. Typologies spatiales de la sécurité alimentaire et nutritionnelle appliquées à l’agriculture et aux chaînes de valeur alimentaires dans l’Est de la RDC. Washington, DC: International Food Policy Research Institute, 2020. http://dx.doi.org/10.2499/p15738coll2.134210.

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A., Muley-Byayuwa, and Cheteu L.B. Agroforesterie et gestion durable des ressources naturelles pour l'atténuation et l'adaptation dans l'hinterland du Parc National de Kahuzi- Biega en RDC. Center for International Forestry Research (CIFOR), 2014. http://dx.doi.org/10.17528/cifor/005064.

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Marivoet, Wim, John M. Ulimwengu, and Abdallah Cissé. Analyse des flux physiques, performances économiques et relations au sein des filières de manioc, de riz, de lait et de poisson au Sud-Kivu et Tanganyika RDC 2021. Washington, DC: International Food Policy Research Institute, 2023. http://dx.doi.org/10.2499/p15738coll2.136602.

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