bluuebunny/crossref_metadata_2025_split huggingface dataset:
Acid Zeolites as Alcohol Racemization Catalysts: Screening and Application in Biphasic Dynamic Kinetic Resolution
Authors: Wuyts S. , De Temmerman K. , De Vos D. E. , Jacobs P. A. 
Published: November 2004

AbstractAcid zeolites were screened as heterogeneous catalysts for racemization of benzylic alcohols. The most promising zeolites appeared to be H‐Beta zeolites, for which the optimal reaction conditions were studied in further detail. The zeolite performance was compared to that of homogeneous acids and acid resins under similar reaction conditions. In a second part of the research, H‐Beta zeolites were applied in dynamic kinetic resolution (DKR) of 1‐phenylethanol, which was conducted by means of a two‐phase approach and which resulted in yields smoothly crossing the 50 % border up to 90 %, with an enantiomeric excess of >99 %. To explore the applicability of this biphasic methodology, several other substrates were examined in the standard racemization reaction and in the biphasic dynamic kinetic resolution.
Appropriateness of breast‐conserving treatment of breast carcinoma in women with germline mutations in BRCA1 or BRCA2
Authors: Robson Mark , Svahn Tiffany , McCormick Beryl , Borgen Patrick , A. Hudis Clifford , Norton Larry , Offit Kenneth 
Published: November 2004

AbstractBACKGROUNDAlthough BRCA1 and BRCA2 were identified in 1994 and 1995, respectively, to the authors' knowledge the optimal management of women with BRCA‐associated breast carcinoma remains incompletely defined. The current study evaluates the appropriateness of breast‐conserving therapy (BCT) in women with BRCA mutations.METHODSBetween May 1992 and October 2003, 87 female participants in genetic testing protocols were identified who 1) were found to have deleterious germline BRCA mutations and 2) reported a history of invasive breast carcinoma that was treated with wide local excision and radiation therapy. Clinical records were reviewed and follow‐up was updated.RESULTSThe 87 subjects underwent BCT for 95 invasive breast tumors (8 women received BCT for metachronous bilateral tumors). In all 95 treated breasts, the 5‐year and 10‐year probabilities of metachronous ipsilateral breast carcinoma (MIBC) were 11.2% and 13.6%, respectively. Among the 87 subjects, the 5‐year and 10‐year probabilities of metachronous contralateral breast carcinoma (CBC) after treatment of the index tumor were 11.9% and 37.6%. No clinical factors were identified that were associated with either MIBC or CBC, including the use of tamoxifen or chemotherapy.CONCLUSIONSWomen with BRCA‐associated breast carcinoma who undergo BCT appear to have risks of MIBC that are similar to those reported for young women without known mutations. The indications for unilateral mastectomy in this group of women should be the same as those for women with nonhereditary carcinoma. However, significant risks of CBC and possibly late MIBC may prompt the serious consideration of bilateral mastectomy as a preventive measure. Cancer 2005. © 2004 American Cancer Society.
X‐ray Absorption Spectra of CuII and CuIII Complexes of N,N′‐1,2‐Phenylenebis(2‐mercapto‐2‐methylpropionamide)
Authors: Barone Giampaolo , La Manna Gianfranco , Duca Dario 
Published: November 2004

AbstractThe X‐ray absorption spectra of CuII and CuIII complexes of N,N′‐1,2‐phenylenebis(2‐mercapto‐2‐methylpropionamide) were recorded and analysed in solid phase. The EXAFS spectra of the two samples were refined with full multiple scattering path. Geometry optimisations on the CuII and CuIII complexes were performed by the B3LYP density functional method, with the 6‐31G(d,p) basis set, considering different spin multiplicities. The singlet state of the CuIII complex was shown to be more stable than the triplet state, and a good agreement between the calculated and the corresponding experimental structure was found. Further single‐point calculations on the optimised geometry were carried out at the Hartree−Fock level for obtaining molecular orbital eigenvectors and eigenvalues. The latter were employed as parameters in a new fitting approach to rationalise the shape of the K‐edge of the XAS spectra. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Novel Binary Compounds of Group 15 Elements: Synthesis and Characterisation of [Sb4(PSiMe2Thex)4], [Sb4(AsSiiPr3)4] and [Sb2(PSiPh2tBu)4]
Authors: Nikolova Donna , von Hänisch Carsten 
Published: November 2004

AbstractThe low‐temperature reactions of Me2ThexSiPLi2 (Thex = CMe2iPr) and iPr3SiAsLi2 with SbCl3 in a 3:2 molar ratio yields the cage compounds [Sb4(PSiMe2Thex)4] (1) and [Sb4(AsSiiPr3)4] (2), respectively. The metal salt SbBr3 reacts with tBuPh2SiPLi2 at −70 °C to give the bicyclic compound [Sb2(PSiPh2tBu)4] (3). Compounds 1−3 were characterised by NMR and IR spectroscopy, mass spectrometry, elemental analysis and single‐crystal X‐ray diffraction. The structures of 1 and 2 reveal that the both compounds adopt a structure similar to those of realgar (As4S4). The central structural motif is an Sb4Y4 cage (Y = P, As), consisting of four five‐membered rings with common edges. The bicyclic compound 3 is composed of five‐membered and three‐membered rings sharing a common Sb2 bridgehead. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Temperature‐Controlled Solvothermal Syntheses, Structures and Characterizations of a Novel Class of Zn Complexes Constructed from 1,4‐Bis[2‐(5‐phenyloxazolyl)]benzene
Authors: Chen Shu‐Mei , Lu Can‐Zhong , Zhang Quan‐Zheng , Liu Jiu‐Hui , Wu Xiao‐Yuan 
Published: November 2004

AbstractThree novel complexes, ZnCl2(H2O)(POPOP)·POPOP) (1), [ZnCl2(POPOP)]n (2), and {Zn2(CH3COO)(POPOP)1.5Cl3}n (3) {POPOP = 1,4‐bis[2‐(5‐phenyloxazolyl)]benzene}, of zinc−POPOP coordination polymers have been obtained from an identical starting mixture using temperature as the only independent variable. Complexes 1−3 all crystallize in the triclinic P$\bar 1$
space group, but their ZnII centers adopt different coordinations. Complex 1 consists of POPOP‐coordinated zinc units and discrete POPOP molecules, 2 features an interesting zigzag chain structure, and 3 consists of unique ladder‐like double‐chains bridged by POPOP units. Furthermore, 1−3 display some different fluorescent emissions based on their different coordination architectures. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
cyclo(β‐Asp‐β3‐hVal‐β3‐hLys) – Solid‐Phase Synthesis and Solution Structure of a Water Soluble β‐Tripeptide. Preliminary Communication
Authors: Büttner Frank , Erdélyi Máté , Arvidsson Per I. 
Published: November 2004

AbstractThe H2O‐soluble cyclic β3‐tripeptide cyclo(β‐Asp‐β3‐hVal‐β3‐hLys) (4) was obtained by on‐resin cyclization of the side‐chain‐anchored β‐peptide 3 (Scheme). In aqueous solution, 4 adopts a structure with uniformly oriented amide bonds and all side chains in lateral positions (Fig. 3).
Synthesis of Novel Chiral Ionic Liquids and Their Phase Behavior in Mixtures with Smectic and Nematic Liquid Crystals
Authors: Tosoni Martin , Laschat Sabine , Baro Angelika 
Published: November 2004

AbstractAlkylation of 1‐alkyl‐1H‐imidazoles 2a–f with citronellyl bromide 1b opens access to chiral 1H‐imidazolium bromides 3a–f (Scheme 1). A similar strategy yielded the chiral pyridinium ionic liquid 6 (Scheme 2). Dialkylation of 1H‐imidazole (7) gave the C2‐symmetric 1,3‐dicitronellyl‐1H‐imidazolium bromide (8) (Scheme 3). Differential scanning calorimetry and optical polarizing microscopy revealed smectic mesophases for 1‐citronellyl‐3‐tetradecy‐1H‐limidazolium bromide (3e) and 1‐citronellylpyridinium bromide (6) (Table). In binary mixtures with smectic and nematic liquid crystals 9 and 10, 1‐citronellyl‐3‐methyl‐1H‐imidazolium bromide (3a) behaved differently. Increasing quantities of 3a cause a decrease of the smectic‐phase width for the mixture 3a/9 (Fig. 3), whereas the phase width of the nematic phase for 3a/10 remained nearly constant (Fig. 4).
Adenanthusone, a New Ursane Type Nortriterpenoid from Isodon adenanthus
Authors: Xiang Wei , Song Qi‐Shi , Zhang Hong‐Jie , Li Rong‐Tao , Na Zhi , Sun Han‐Dong 
Published: November 2004

AbstractA new ursane‐type nortriterpenoid, adenanthusone (=(11α,12α)‐4‐demethyl‐11,12‐epoxy‐3,13‐dihydroxy‐2‐oxoursa‐3,20(30)‐diene‐28‐oic acid γ‐lactone; 1) was isolated from Isodon adenanthus. Its structure was determined by NMR spectra and X‐ray crystallographic diffraction analysis. The biogenetic implication of the nortriterpene is discussed.
Four Novel Dihydroisocoumarin (=3,4‐Dihydro‐1H‐2‐benzopyran‐1‐one) Glucosides from the Fungus Cephalosporium sp. AL031
Authors: Bi Yun‐Mei , Bi Xu‐Bin , Zhao Qian‐Rong , Chen Yuan‐Teng , Xie Jin‐Lun 
Published: November 2004

AbstractFour novel dihydroisocoumarin (=3,4‐dihydro‐1H‐2‐benzopyran‐1‐one) glucosides were isolated from a culture broth of a strain of the fungus Cephalosporium sp. AL031. Their structures were elucidated as (2E,4E)‐5‐[(3S)‐5‐acetyl‐8‐(β‐D‐glucopyranosyloxy)‐3,4‐dihydro‐6‐hydroxy‐1‐oxo‐1H‐2‐benzopyran‐3‐yl]penta‐2,4‐dienal (1), (2E,4E)‐5‐[(3S)‐5‐acetyl‐8‐(β‐D‐glucopyranosyloxy)‐3,4‐dihydro‐6‐methoxy‐1‐oxo‐1H‐2‐benzopyran‐3‐yl]penta‐2,4‐dienal (2), (3S)‐8‐(β‐D‐glucopyranosyloxy)‐3‐[(1E,3E,5E)‐hepta‐1,3,5‐trienyl]‐3,4‐dihydro‐6‐hydroxy‐5‐methyl‐1H‐2‐benzopyran‐1‐one (3), and (3S)‐8‐[(6‐O‐acetyl‐β‐D‐glucopyranosyl)oxy]‐3‐[(1E,3E,5E)‐hepta‐1,3,5‐trienyl]‐3,4‐dihydro‐6‐methoxy‐5‐methyl‐1H‐2‐benzopyran‐1‐one (4) by spectroscopic methods, including 2D‐NMR techniques and chemical methods.
Amphiphilic Dendrimers with Heteroleptic Bis([2,2′: 6′,2″]terpyridine)‐Ruthenium(II) Cores
Authors: Joester Derk , Gramlich Volker , Diederich François 
Published: November 2004

AbstractA new series of dendrimers was assembled through formation of homo‐ and heteroleptic RuII complexes with [2,2′: 6′,2″]terpyridine ligands bearing hydrophilic and hydrophobic dendrons, with the aim to develop amphiphilic vectors for potential use in gene delivery (Scheme 1). The synthesis started with the preparation of the 4′‐(3,5‐dihalo‐4‐methoxyphenyl)‐[2,2′: 6′,2″]terpyridine ligands 1a,b via the Kröhnke pyridine synthesis (Scheme 2), followed by attachment of dendrons 10a–10f (Fig. 2) by Sonogashira cross‐coupling to give the dendritic ligands 11–16 (Schemes 3 and 4). Ligands were subsequently introduced into the coordination sphere of RuIII to give the stable intermediates [Ru(11)Cl3] (24; Scheme 7) and [Ru(14)Cl3] (27; Scheme 8). These were transformed under reductive conditions into the heteroleptic complexes [Ru(11)(13)](PF6)2 (25) and [Ru(13)(14)](PF6)2 (29). Removal of the (tert‐butoxy)carbonyl (Boc) protecting groups in 25 and 29 then gave the desired amphiphilic dendrimers 26 (Scheme 7) and 30 (Scheme 8) with branchings of generations 0 and 1. Complex formation was analyzed by high‐resolution matrix‐assisted laser‐desorption‐ionization Fourier‐transform ion‐cyclotron‐resonance mass spectrometry (HR‐MALDI‐FT‐ICR‐MS), which provided spectra featuring unique fragment‐ion series and perfectly resolved isotope distribution patterns (Figs. 4 and 5). The preparation of homo‐ and heteroleptic complexes with terpyridine ligands bearing generation‐2 dendrons failed due to steric hindrance by the bulky wedges.
Study of the Fire Performance of Magnesium Hydroxide Sulfate Hydrate Whisker Flame Retardant Polyethylene
Authors: Lu Hongdian , Hu Yuan , Yang Ling , Wang Zhengzhou , Chen Zuyao , Fan Weicheng 
Published: November 2004

AbstractSummary: Halogen‐free, flame retardant low density polyethylene (LDPE) composites, using magnesium hydroxide sulfate hydrate (MHSH) whiskers as a flame retardant, combined with microencapsulated red phosphorous (MRP) as a synergist, have been prepared using a two‐roll mill. Their fire properties were determined by using the limiting oxygen index (LOI), the UL‐94 test and cone calorimetry. The results showed that MRP was a good synergist in improving the flame retardance of the LDPE/MHSH whisker system. Poly[ethylene‐co‐(vinyl acetate)] (EVA), used as a compatibilizer, increased the fire performance of LDPE/MHSH whisker composites.HRR curves for LDPE/MHSH whisker composites.magnified imageHRR curves for LDPE/MHSH whisker composites.
Eigenvalue sensitivity and parametric optimization of the large rotating systems
Authors: Byrtus Miroslav , Zeman Vladimír , Hajžman Michal 
Published: November 2004

AbstractThe contribution presents the modal synthesis method of the mathematical modelling of the large rotating systems. The condensed mathematical model is used for deriving analytical formula for eigenvalue sensitivity calculation. According to the sensitivity analysis suitable design parameters are chosen and the optimization process for the purpose of steady state response minimization in a certain operating speed area is performed. The theory is applied to a simple test‐gearbox. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Ein Modell zur Untersuchung des dynamischen Verhaltens von Oberbausystemen
Authors: Hochrainer M. J. 
Published: November 2004

AbstractIm Eisenbahnwesen basiert die Modellierung und Berechnung von Oberbausystemen auch heute noch hauptsächlich auf der Analyse von elastisch gebetteten Balken und der Formel von Zimmermann. Für dieses Modell wird eine dynamische Erweiterung vorgestellt, welche unter anderem auch die Berücksichtigung einer diskreten Schienenlagerung, unterschiedlicher Oberbausysteme oder bewegter dynamischer Lasten erlaubt. Die numerische Berechnung erfolgt auf Basis einer finiten Elemente Formulierung für bewegte Referenzsysteme und ermöglicht, im Unterschied zu analytischen Lösungen, große Flexibilität in der System‐ und Parameterwahl. Die allgemeine Beschreibung eignet sich unter anderem zur Untersuchung der Fahrzeug‐Fahrweg‐Interaktion für Schotteroberbau, Feste Fahrbahn oder Masse‐Feder‐Systeme, sowie zur Abschätzung der Schwingungsanregung für eine nachfolgende Untersuchung der Erschütterungsausbreitung im Untergrund. Durch den Einsatz von Substrukturmethoden können auch komplexe Fahrzeug‐ und Untergrundmodelle in die Oberbausimulation eingebunden werden. Eine Optimierung der Vertikaldynamik von Oberbausystemen ist für Bahnerhalter, Anrainer und Reisende von Bedeutung, weil dadurch einerseits die mechanische Belastung der Bahnstrecken, die Erhaltungskosten und die Abstrahlung von Lärm und Erschütterungen minimiert und andererseits die Basis für einen erhöhten Reisekomfort geschaffen wird. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Stabilizing and destabilizing effect of small velocity‐dependent forceson non‐conservative systems: new results
Authors: Kirillov Oleg 
Published: November 2004

AbstractA theory of the destabilization paradox in general non‐conservative systems with small dissipative and gyroscopic forces is presented. The problem is investigated by the approach based on the sensitivity analysis of multiple eigenvalues. An explicit asymptotic expression for the critical load as a function of the dissipation and gyroscopic parameters allowing to calculate a jump in the critical load is derived. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Analysis of Nonlinear Discrete‐time Control Systems based on Lie‐Groups
Authors: Holl Johann , Schlacher Kurt 
Published: November 2004

AbstractThis contribution is concerned with the observability and accessibility analysis of nonlinear explicit discrete‐time control systems. The presented approach is fundamental based on the fact that the geometric interpretation known from the analysis of continuous‐time systems based on Lie groups is also appropriate in the discrete‐time case. It is shown that by investigation of invariants of Lie groups acting on the solution of the system it is possible to state conditions for local observability and accessibility without calculating the solution. These methods provide tests which can be done by computer algebra. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
A modal approach to flatness‐based control of flexible structures
Authors: Meurer Thomas , Zeitz Michael 
Published: November 2004

AbstractModal coordinates are used to construct a state and input parameterizing flat output for flexible structures and to design open‐loop controls. This is illustrated for the boundary control of a Timoshenko beam model. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
On synchronized solutions of coupled Van‐der‐Pol equations
Authors: Teufel Andreas 
Published: November 2004

AbstractTwo linearly coupled Van‐der‐Pol oscillators are considered in the case of a small frequency detuning of the oscillators as well as weak coupling. The occurring resonant Hopf bifurcation leading to synchronized motions is examined and analytical approximations of the oscillation amplitudes and the synchronous frequency are derived. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Seilkraftoptimierung für redundante Parallelmanipulatoren mit Seilantrieben
Authors: Franitza Daniel , Fang Shiqing 
Published: November 2004

AbstractSeilgetriebene Parallelkinematiken bieten unter den heute verfügbaren Handhabungssystemen die besten dynamischen Voraussetzungen für schnelle Bewegungen. Allerdings stehen der geringen zu bewegenden Masse restriktive Nebenbedingungen gegenüber, die die übertragbaren Seilkräfte nach oben und unten mit endlichen Werten begrenzen. Für eine vollständige Nutzung von n Freiheitsgraden sind daher m > n Seile zur Anlenkung des Endeffektors nötig, was zu gewollten Verspannungen innerhalb der eingeleiteten Seilkräfte führt. Der Beitrag beschäftigt sich mit einer anwendungsorientierten Formulierung der Seilkraftoptimierung und stellt alternative Konzepte für eine gegebene Plattformbewegung gegenüber. Der Algorithmus wird am einem Prüfstand mit sieben Seilen zur Bewegung einer Plattform mit sechs Freiheitsgraden verifiziert. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Ein O(n) Verfahren zum Lösen von starren Mehrkörperketten mit Kontaktbedingungen
Authors: Gattringer Hubert , Bremer Hartmut 
Published: November 2004

AbstractBei der Modellierung von Mehrkörperketten (starr oder elastisch), wie das bei Robotern der Fall ist, entstehen sehr große Bewegungsgleichungen. Für deren Simulation ist die explizite Invertierung der Massenmatrix (On3) notwendig. Bei dem in dieser Arbeit vorgestellten On Verfahren, welches die Invertierung der Massenmatrix aufgrund der speziellen Struktur der Bewegungsgleichungen rekursiv durchführt, wird die Rechenzeit deutlich reduziert. Treten bei Mehrkörperketten noch zusätzliche Kontakte auf, so kann dies durch die Hinzunahme eines Lagrangeschen Parameters zur Bewegungsgleichung erfolgen. Zur Berechnung dieser Zwangskraft wäre bei der herkömmlichen Modellierung wieder die inverse Massenmatrix notwendig. Der in dieser Arbeit präsentierte Algorithmus kommt ohne eine explizite Invertierung zur Berechnung des Lagrangeschen Parameters aus. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Dynamische Modellierung hybrider Knickarmroboter unter Berücksichtigung
Authors: Mitterhuber Ralph , Gattringer Hubert , Bremer Hartmut 
Published: November 2004

AbstractDie dynamische Modellbildung von kettenförmigen Mehrkörpersystemen, bestehend aus starren und elastischen Einzelkörpern, führt mit zunehmender Anzahl von Körpern rasch zu sehr großen, partiellen Bewegungsgleichungen. Unter der Annahme von linearisierbar kleinen elastischen Deformationen kann mittels Ritzansätzen auf eine Beschreibung mit gewöhnlichen Differentialgleichungen übergegangen werden. Bei der Herleitung der Bewegungsgleichungen ist es zielführend, das System geeignet zu strukturieren, um so interpretierbare Zwischenergebnisse zu erhalten. Diese Vorgangsweise führt zur Verwendung der Projektionsgleichung, einer synthetischen Methode, welche Impuls‐ und Drallbeziehungen der Einzelkörper unter Elimination der Zwangskräfte in den Raum der Minimalgeschwindigkeiten projiziert. Unter Berücksichtigung der Struktur des betrachteten Systems lassen sich zudem einzelne Körper zu Gruppen, sogenannten Subsystemen, mit entsprechenden beschreibenden Geschwindigkeiten zusammenfassen. Die Dimensionen der resultierenden Massenmatrix des Gesamtsystems entsprechen der Dimension des Minimalgeschwindigkeitsvektors. Der Rechenaufwand zur Invertierung der Massenmatrix und somit zur numerischen Lösung explodiert förmlich mit der kubischen Ordnung der Freiheitsgrade. Aufgrund der kettenförmigen Struktur des elastischen Mehrkörpersystems lässt sich jedoch ein einfach strukturiertes Verfahren angeben, bei dem nur Matrizen der Dimensionen der Relativfreiheitsgrade der Subsysteme zu invertieren sind. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
The Relationships between the Shape of the Workspace and GeometricalDimensions of Parallel Manipulators
Authors: Pisla D. , Pisla A. 
Published: November 2004

AbstractIn this paper, a new simulation program for the workspace analysis of parallel robots is presented. The system consists of modules, which enable a complex study of the parallel structures. A special method for generating the workspace of the parallel structures is used. The simulation program offers the possibility to generate automatically the virtual model of the parallel robot using the facilities of a 3D modeling software. The structure geometric parameters, which could be modified within the modeling software, influence the simulation environment. These facilities enable to establish the relationships between the workspace shape, elements links and geometrical parameters of the structure. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Integrated motion measurement of rigid multibody systems
Authors: Wagner Jörg F. 
Published: November 2004

AbstractDuring the last years, integrated navigation systems based on gyros, accelerometers, and GPS receivers became powerful devices for the guidance of aircraft and ships. Comparable equipment using especially wheel sensors exists for cars. The kernel of such systems is a Kalman filter estimating the relevant vehicle motion. The filter design in turn requires a kinematical model to settle on the motion components considered and to describe the mechanical meaning of the measurements employed. Until now, usual models consider only one to six degrees of freedom of a single rigid body.The assumption of a solitary rigid body is not a consequence of the basic concept of integrated navigation; it reflects merely classical navigation requirements. In principle, determining the motion of multibody systems, representing certain vehicle types of varying shape, is possible if appropriate kinematical models and sensor arrangements are available.Based on the theory of integrated navigation systems, the paper outlines the fundamentals of designing integrated motion measurement systems for rigid multibody structures. The example of a double pendulum with a movable inertial support and with equipment of microelectromechanical inertial sensors and of small radar units illustrates this approach. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Generalized inertia forces of rigid and flexible bodies
Authors: Zahariev Evtim V. 
Published: November 2004

AbstractIn the paper a method for deriving the dynamic equations of motion of rigid and flexible multibody systems is presented. Three dimensional matrices are applied for working out the configuration space dynamic equations. Finite elements are used for modeling of flexible systems. Novel generalized Newton‐Euler equations and relations for inertia forces in nodes of flexible elements are proposed. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
On the dynamics of axially moving strings
Authors: Renezeder Hans C. , Steindl Alois , Troger Hans 
Published: November 2004

AbstractWe investigate an axially moving cable with large sag modelled as string and calculate the steady state solution between two rolls. Alternatively we model the cable as beam with very small bending stiffness and compare this solution with the string solution. The validity of the analytically found boundary layer solution is verified by numerical methods. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)