102 research outputs found

    Preventing Unstable Operation of a Synthesis Compressor Using Dynamic System Simulation

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    Case Study• An example of unexpected dynamic response • Results of an analysis using modeling of the complete compressor installation 1. Lay-out of the compressor system 2. Description of the problem 3. Measurements 4. Analysis by means of a computer model 5. Conclusion

    Preventing Unstable Operation of a Synthesis Compressor Using Dynamic System Simulation

    Get PDF
    Case Study• An example of unexpected dynamic response • Results of an analysis using modeling of the complete compressor installation 1. Lay-out of the compressor system 2. Description of the problem 3. Measurements 4. Analysis by means of a computer model 5. Conclusion

    Een parallel-serie omzetter

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    Sunlight Powered Continuous Flow Reverse Water Gas Shift Process Using a Plasmonic Au/TiO<sub>2</sub> Nanocatalyst

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    The continuous flow reverse water gas shift (rWGS) process was efficiently catalyzed by a plasmonic Au/TiO2 nanocatalyst using sunlight as sole and sustainable energy source. The influence of the catalyst bed thickness on the CO production rate was studied, and three different catalytic regimes were identified as direct plasmon catalysis (DPC), shielded plasmon catalysis (SPC) and unused plasmon catalysis (UPC). The CO2 : H2 ratio was optimized to 4 : 1 and a maximum CO production rate of 7420 mmol ⋅ m−2 ⋅ h−1 was achieved under mild reaction conditions (p=3.5 bar, no external heating, Ee=14.0 kW ⋅ m−2), corresponding to an aparent quantum efficiency of 4.15%. The stability of the Au/TiO2 catalyst was studied for 110 h continuous operation, maintaining more than 82% of the initial CO production rate. On/off experiments mimicking discontinuous sunlight powered processing furthermore showed that the Au/TiO2 catalyst was stable for 8 consecutive runs.</p

    Histoire des syndicats de fonctionnaires et du mouvement social en Seine Maritime de 1944 à 1981

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    In 1944, the National Council of Resistance decides to rebuild a welfare state, in continuation of the Popular Front, that the second World War stops it. The trade unions reunified, in CGT (except CFTC) decide to sustain this program. The trade unions of civil servants from Seine-Maritime organize themselves to take part in this rebuild that they waited for it. What are their demands ? On What do they lean themselves to put them before ? What are their values for which they fight? Do they wait all from the state ? What is their idea of this welfare state ? At least, what means do they use to fight for it and bring it to progress ? Getting the recognition of their freedom union laws, which includes right striking, they agree civil servant status which turn out very protective against their adminstration and its hierarchy. They get too the management of Health Security by their mutual insurances which lead them, in Seine-Maritme, to build a powerful departemental mutual insurance. However, the division of world in two blocks, one liberal and one communist, goes through these trade unions and leads to the break away of 1947 That does not prevent the participation to strikes of 1953 wich they are be able to save their retirement. If they sustain general De Gaulle in his decolonization policy and against seditious generals, they clash him on his institutional, économic and social policy. The strike of 1968 is the culmination of it, throuhgout adjournements. But in order to restore the welfare state that they hope, they must sustain lefts’ candidate, François Mitterrand, in their electoral compaigns of 1974 and 1981, who wins in this last year, in spite of their differences and thanks to the Will of unity of their activists.En 1944, le Conseil national de la Résistance décide de reconstruire un Etat social dans la continuité du Front populaire, avant que le second conflit ne l’interrompe. Les syndicats ouvriers réunifiés dans la CGT (sauf la CFTC) décident de soutenir ce programme. Les syndicats de fonctionnaires de Seine-Maritime s’organisent pour participer à cette reconstruction qu’ils attendaient. Quels sont leurs revendications ? Sur quoi s’appuient-ils pour les mettre en avant ? Quels sont les valeurs qu’ils défendent ? Attendent-ils tout de l’Etat social ? Quelle est leur conception de cet Etat social ? Enfin, quels moyens utilisent-ils pour le défendre et le faire progresser ? Obtenant la reconnaissance de leur liberté syndicale qui comprend le droit de grève, ils acceptent un statut qui se révèle fort protecteur vis-à-vis de l’administration et de sa hiérarchie. Ils obtiennent aussi la gestion de la Sécurité sociale par leurs mutuelles qui les entraînent, en Seine-Maritime, à construire une mutualité départementale unifiée et puissante. Toutefois, la division du monde en deux blocs, un libéral et un communiste, traverse ces syndicats et aboutit à la scission de 1947. Cela n’empêche pas la participation aux grèves de 1953 qui leur permet de sauver leur retraite. S’ils soutiennent le général de Gaulle (1890-1970) dans sa politique de décolonisation et contre les généraux factieux, ils l’affrontent sur sa politique institutionnelle, économique et sociale. La grève de 1968 en est l’aboutissement, par-delà les remises en cause. Mais pour rétablir l’Etat social qu’ils souhaitent, il leur faut soutenir les campagnes électorales de 1974 et 1981 du candidat de la gauche, François Mitterrand (1916-1996), qui l’emporte en 1981, en dépit de leurs divergences et grâce à la volonté unitaire de leurs militants

    Biomarkers in anal cancer: from biological understanding to stratified treatment

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    Squamous cell carcinomas of the anus and anal canal represent a model of a cancer and perhaps the first where level 1 evidence supported primary chemoradiotherapy (CRT) in treating locoregional disease with curative intent. The majority of tumours are associated with infection with oncogenic subtypes of human papilloma virus and this plays a significant role in their sensitivity to treatment. However, not all tumours are cured with CRT and there remain opportunities to improve outcomes in terms of oncological control and also reducing late toxicities. Understanding the biology of ASCC promises to allow a more personalised approach to treatment, with the development and validation of a range of biomarkers and associated techniques that are the focus of this review

    A dualistic model of primary anal canal adenocarcinoma with distinct cellular origins, etiologies, inflammatory microenvironments and mutational signatures: implications for personalised medicine.

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    Primary adenocarcinoma of the anal canal is a rare and aggressive gastrointestinal disease with unclear pathogenesis. Because of its rarity, no clear clinical practice guideline has been defined and a targeted therapeutic armamentarium has yet to be developed. The present article aimed at addressing this information gap by in-depth characterising the anal glandular neoplasms at the histologic, immunologic, genomic and epidemiologic levels. In this multi-institutional study, we first examined the histological features displayed by each collected tumour (n = 74) and analysed their etiological relationship with human papillomavirus (HPV) infection. The intratumoural immune cell subsets (CD4, CD8, Foxp3), the expression of immune checkpoints (PD-1, PD-L1), the defect in mismatch repair proteins and the mutation analysis of multiple clinically relevant genes in the gastrointestinal cancer setting were also determined. Finally, the prognostic significance of each clinicopathological variable was assessed. Phenotypic analysis revealed two region-specific subtypes of anal canal adenocarcinoma. The significant differences in the HPV status, density of tumour-infiltrating lymphocytes, expression of immune checkpoints and mutational profile of several targetable genes further supported the separation of these latter neoplasms into two distinct entities. Importantly, anal gland/transitional-type cancers, which poorly respond to standard treatments, displayed less mutations in downstream effectors of the EGFR signalling pathway (i.e., KRAS and NRAS) and demonstrated a significantly higher expression of the immune inhibitory ligand-receptor pair PD-1/PD-L1 compared to their counterparts arising from the colorectal mucosa. Taken together, the findings reported in the present article reveal, for the first time, that glandular neoplasms of the anal canal arise by HPV-dependent or independent pathways. These etiological differences leads to both individual immune profiles and mutational landscapes that can be targeted for therapeutic benefits
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