Scheffczyk Jan (26 results)

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Paperback. Condition: New. Optimal performance of chemical processes requires both optimized operating conditions and carefully selected molecules such as solvents. However, the search for optimal molecules and process concepts often has a limited focus: Either processes are optimized using a pre-defined set of molecules or molecules are selected for novel applications based on simplified process indicators. At the same time, the search for optimal molecules often relies on strongly simplified thermodynamic models that require experimentally determined group interaction parameters and confine the molecular design space. Overall, current design approaches often do not capture complex process trade-offs and are limited to prescriptive sets of molecules which likely results in suboptimal choices.To address the challenge of identifying optimal processes and molecules, this thesis presents an integrated computer-aided molecular and process design (CAMPD) approach. The design approach uses quantum mechanics (QM)-based property prediction by COSMO-RS and is thus independent of experimental determined group interaction parameters while not relying on group additivity. For reliable and fast evaluation of complex processes, advanced pinch-based process models are employed. These pinch-based process models account for the inherent trade-off in molecular properties while being both computationally efficient and accurate in comparison to rigorous process models. The integrated design approach in this thesis is stepwise extended from process-level molecular screenings towards molecular design for separation and reaction-separation processes. The application of the presented integrated design approach is illustrated for various examples of solvent selection and process optimization. In particular, process concepts and solvents are investigated for the purification of bio-based platform chemicals as well as the production of CO from CO2. Overall, this thesis successfully integrates COSMO-RS property prediction in CAMPD and thus significantly expands the range and applicability of current CAMPD approaches.…

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Paperback. Condition: new. Paperback. Optimal performance of chemical processes requires both optimized operating conditions and carefully selected molecules such as solvents. However, the search for optimal molecules and process concepts often has a limited focus: Either processes are optimized using a pre-defined set of molecules or molecules are selected for novel applications based on simplified process indicators. At the same time, the search for optimal molecules often relies on strongly simplified thermodynamic models that require experimentally determined group interaction parameters and confine the molecular design space. Overall, current design approaches often do not capture complex process trade-offs and are limited to prescriptive sets of molecules which likely results in suboptimal choices.To address the challenge of identifying optimal processes and molecules, this thesis presents an integrated computer-aided molecular and process design (CAMPD) approach. The design approach uses quantum mechanics (QM)-based property prediction by COSMO-RS and is thus independent of experimental determined group interaction parameters while not relying on group additivity. For reliable and fast evaluation of complex processes, advanced pinch-based process models are employed. These pinch-based process models account for the inherent trade-off in molecular properties while being both computationally efficient and accurate in comparison to rigorous process models. The integrated design approach in this thesis is stepwise extended from process-level molecular screenings towards molecular design for separation and reaction-separation processes. The application of the presented integrated design approach is illustrated for various examples of solvent selection and process optimization. In particular, process concepts and solvents are investigated for the purification of bio-based platform chemicals as well as the production of CO from CO2. Overall, this thesis successfully integrates COSMO-RS property prediction in CAMPD and thus significantly expands the range and applicability of current CAMPD approaches. Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

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Paperback. Condition: Brand New. 168 pages. German language. 8.27x5.91x0.79 inches. In Stock.

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Condition: New. 2018. 1st Edition. paperback. . . . . . Books ship from the US and Ireland.

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Paperback. Condition: New. Optimal performance of chemical processes requires both optimized operating conditions and carefully selected molecules such as solvents. However, the search for optimal molecules and process concepts often has a limited focus: Either processes are optimized using a pre-defined set of molecules or molecules are selected for novel applications based on simplified process indicators. At the same time, the search for optimal molecules often relies on strongly simplified thermodynamic models that require experimentally determined group interaction parameters and confine the molecular design space. Overall, current design approaches often do not capture complex process trade-offs and are limited to prescriptive sets of molecules which likely results in suboptimal choices.To address the challenge of identifying optimal processes and molecules, this thesis presents an integrated computer-aided molecular and process design (CAMPD) approach. The design approach uses quantum mechanics (QM)-based property prediction by COSMO-RS and is thus independent of experimental determined group interaction parameters while not relying on group additivity. For reliable and fast evaluation of complex processes, advanced pinch-based process models are employed. These pinch-based process models account for the inherent trade-off in molecular properties while being both computationally efficient and accurate in comparison to rigorous process models. The integrated design approach in this thesis is stepwise extended from process-level molecular screenings towards molecular design for separation and reaction-separation processes. The application of the presented integrated design approach is illustrated for various examples of solvent selection and process optimization. In particular, process concepts and solvents are investigated for the purification of bio-based platform chemicals as well as the production of CO from CO2. Overall, this thesis successfully integrates COSMO-RS property prediction in CAMPD and thus significantly expands the range and applicability of current CAMPD approaches.…

Paperback. Condition: new. Paperback. Optimal performance of chemical processes requires both optimized operating conditions and carefully selected molecules such as solvents. However, the search for optimal molecules and process concepts often has a limited focus: Either processes are optimized using a pre-defined set of molecules or molecules are selected for novel applications based on simplified process indicators. At the same time, the search for optimal molecules often relies on strongly simplified thermodynamic models that require experimentally determined group interaction parameters and confine the molecular design space. Overall, current design approaches often do not capture complex process trade-offs and are limited to prescriptive sets of molecules which likely results in suboptimal choices.To address the challenge of identifying optimal processes and molecules, this thesis presents an integrated computer-aided molecular and process design (CAMPD) approach. The design approach uses quantum mechanics (QM)-based property prediction by COSMO-RS and is thus independent of experimental determined group interaction parameters while not relying on group additivity. For reliable and fast evaluation of complex processes, advanced pinch-based process models are employed. These pinch-based process models account for the inherent trade-off in molecular properties while being both computationally efficient and accurate in comparison to rigorous process models. The integrated design approach in this thesis is stepwise extended from process-level molecular screenings towards molecular design for separation and reaction-separation processes. The application of the presented integrated design approach is illustrated for various examples of solvent selection and process optimization. In particular, process concepts and solvents are investigated for the purification of bio-based platform chemicals as well as the production of CO from CO2. Overall, this thesis successfully integrates COSMO-RS property prediction in CAMPD and thus significantly expands the range and applicability of current CAMPD approaches. Shipping may be from our Sydney, NSW warehouse or from our UK or US warehouse, depending on stock availability.…

Hardcover. Condition: gut. Auflage: 1 (18. September 2003). Digitale Dokumente langfristig archivieren E-Mails elektronische Bilanzen Fotos Satellitenbilder Konstruktionszeichnungen Speicherung Risiken über längere Zeiträume hinweg zugreifbar und authentisch öffentliche wissenschaftliche Bibliotheken Unternehmen Behörden Bibliothekare Archivare Informatiker langfristige Nutzbarkeit digitaler Dokumentenbestände Langzeitarchivierung von elektronischen Dokumenten Langzeitverfügbarkeit Ziel Daten, Bilder, Dokumente verläßlich und dauerhaft zu archivieren Hochschulbibliotheken OAIS-Referenzmodell für elektronische Archive Lösungskonzepte Migration Emulation Dokumentenbeschreibungssprachen TIFF PDF XML Metadatenauszeichnung Projekte der Migration und Emulation Informationssystem Archive Information und Dokumentation IuD Datenspeicherung Archivierung Datenbank Access Metadatenauszeichnung Migration Emulation Digitale Dokumente existieren heute in Form von E-Mails und elektronische Bilanzen, Fotos und Satellitenbilder, Konstruktionszeichnungen u.v.a.m. Ihre Speicherung birgt aber einige Risiken, besonders, wenn sie über längere Zeiträume hinweg zugreifbar und authentisch bleiben sollen. Dies betrifft nicht nur öffentliche oder wissenschaftliche Bibliotheken, sondern auch viele Unternehmen und Behörden. Wie Langzeitarchivierung in diesen Bereichen funktionieren kann und welche Methoden derzeit erprobt und eingesetzt werden ist Thema dieses Buchs. Das Buch wendet sich vor allem an Bibliothekare, Archivare und Informatiker, die für die langfristige Nutzbarkeit ihrer digitalen Dokumentenbestände verantwortlich sind. Dieses Buch führt umfassend in den gesamten Problembereich der Langzeitarchivierung von elektronischen Dokumenten ein. Dr. Leskien, Generaldirektor der Bayerischen Staatsbibliothek, spricht in seinem Geleitwort zudem von Langzeitverfügbarkeit und weist so zu Recht auf einen weiteren Aspekt hinzum einen muß es das Ziel sein, Daten, Bilder, Dokumente usw. verläßlich und dauerhaft zu archivieren, zum anderen soll aber auch der Anspruch erfüllt werden, Wissen in einer digitalen Welt sofort verfügbar machen zu können. Wissen und Bildung sind nicht zuletzt die Grundpfeiler einer modernen Industrie- und Dienstleistungsgesellschaft und als solche in den Rang eines Produktionsfaktors aufgestiegen. Wissen wird heute aber in erster Linie elektronisch gespeichert und ist dadurch in seinem materiellen Bestand weit mehr gefährdet als in den Jahrhunderten zuvor. Langzeitarchivierung ist immer noch Grundlagenarbeit und wird in Deutschland von Wissenschaftlern der verschiedensten Disziplinen und den Bibliothekaren der Hochschulbibliotheken betrieben. Entsprechend gründlich werden in diesem Buch alle wesentlichen Bereiche eingeführt, die bei einer Lösung der Langzeitarchivierung eine Rolle spielen könnten und derzeit in der Diskussion sind. Der Leser wird mit der generellen Problematik der Langzeitarchivierung digitaler Dokumente vertraut gemacht, dann in das OAIS-Referenzmodell für elektronische Archive eingeführt und lernt zwei grundlegende Lösungskonzepte, das der Migration und der Emulation, kennen. In den weiteren Kapiteln gehen die Autoren auf die Frage der semantischen Beschreibung von Dokumenten ein und stellen die gängigen Dokumentenbeschreibungssprachen (TIFF, PDF, XML) vor. Die Autoren stellen schließlich einen vierstufigen, kombinierten Lösungsansatz vor, mit dem sie dem Problem der Langzeitarchivierung begegnen wollen. Den Abschluß bildet ein praktischer Teil, in dem konkrete Umsetzungen beschrieben werden. Es werden die verschiedenen Ansätze der Metadatenauszeichnung in der Praxis und die laufenden Projekte der Migration und Emulation vorgestellt. Fazit Dieses Buch ist für alle geeignet, die eine fundierte Einführung in die Fragen und Probleme der Langzeitarchivierung erwarten. Es ist aber kein Buch, das mit abschließenden Konzepten aufwartet. Für die Unternehmen ist das Thema zumeist Neuland. Sie können sich zunächst an den Ansätzen der Wissenschaft orientieren und müssen in der Folge ihren eigenen Lösungsweg - passend zu ihren Problemen und Ansprüchen, die andere als die der Wissenschaft sind - entwickeln. Hierzu erhalten sie eine gute Grundlage, was dieses Buch sehr empfehlenswert macht. Langzeitarchivierung. Methoden zur Rettung digitaler Datenbestände Uwe M. Borghoff Peter Rödig Jan Scheffczyk Verlagsort Heidelberg Sprache deutsch Maße 165 x 240 mm Einbandart gebunden Mathematik Informatik Informatik Datenbanken Mathe Informatik Informatiker Theorie Studium Archive Datenbank Dokumentation Informationssystem Information und Dokumentation IuD ISBN-10 3-89864-245-3 3898642453 ISBN-13 978-3-89864-245-3 9783898642453 In deutscher Sprache. 300 pages. 24 x 17,2 x 2,4 cm.…

Condition: New. Print on Demand pp. 292 49:B&W 6.14 x 9.21 in or 234 x 156 mm (Royal 8vo) Perfect Bound on White w/Gloss Lam.

Condition: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Describes important techniques like migration and emulationDetails the OAIS (Open Archival Information System) Reference Model developed through the Open Archives InitiativePresents the most relevant projects such as the Dublin Core Metadat.…

Condition: New. PRINT ON DEMAND pp. 292.

Condition: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Describes important techniques like migration and emulationDetails the OAIS (Open Archival Information System) Reference Model developed through the Open Archives InitiativePresents the most relevant projects such as the Dublin Core Metadat.…