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  • 1
    Electronic Resource
    Electronic Resource
    A local selection criterion for the composition of graded thermoelectric generators (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 1150-1152 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present a procedure that locally determines the composition (from a given set of available materials) of a segmented or graded thermoelectric generator leg in order to maximize its output power to a matched load. The method is based on a new interpretation of the electrical output relation, which is organized to resemble a differential output power along the device coordinate. The procedure is applied to calculate the segment length and output power of a segmented bismuth-telluride/iron-disilicide based thermoelectric generator leg. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.366808
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  • 2
    Electronic Resource
    Electronic Resource
    Lengthening osteotomy of the fibula for post-traumatic malunion (1998)
    Springer
    International orthopaedics 22 (1998), S. 149-152 
    Details
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Resumé. Nous avons analysé six cas de raccourcissement posttraumatique du péroné. Differents types de fracture et de traitement ont menés à cette situation, qui, cliniquement se caracterise par des douleurs au niveau de la cheville et une déviation en valgus et rotation externe du pied. Tous les péronés ont été corrigés par des osteotomies d’allongement (ORP), soit horizontalement ou en forme de ”z”. Nos résultats montrent que la réconstruction opératoire d’une mortaise élargie constitute une intervention relativement simple qui donne de bon résultats et qui peu ralentir ou même arrêter la progression d’une arthrose posttraumatique. En conséquence l’ORP devrait constituer le traitement de choix dans les cas de raccourcissement posttraumatique même si des signes de dégénerescence arthrosique sont présents.
    Notes: Summary. Relative shortening of the fibula may occur after any type of ankle fracture when the lateral malleolus is involved. Patients complain of pain and restriction of their daily and sporting activities. Clinically, there is valgus of the hind foot due to abduction and lateral rotation of the talus. The goal of treatment is to restore the initial length of the fibula by a horizontal or Z-osteotomy, which will also correct the malposition of the talus. This study shows that the operative reconstruction of a widened mortise is a relatively safe procedure, independent of the type of osteotomy used. Lengthening of the fibula is an important step in the treatment of the painful ankle when the fibula is short after trauma, even when degenerative changes of the joint are already present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002640050229
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  • 3
    Electronic Resource
    Electronic Resource
    Evidence for a symbiosis between bacteria of the genus Rhodobacter and the marine sponge Halichondria panicea : harbor also for putatively toxic bacteria? (1998)
    Springer
    Marine biology 130 (1998), S. 529-536 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Halichondria panicea (Pallas) is a marine sponge, abundantly occurring in the Adriatic Sea, North Sea, and Baltic Sea. It was the aim of the present study to investigate if this sponge species harbors bacteria. Cross sections through H. panicea were taken and inspected by electron microscopy. The micrographs showed that this sponge species is colonized by bacteria in its mesohyl compartment. To identify the bacteria, polymerase chain reaction (PCR) analysis of the 16S rRNA gene segment, typical for bacteria, was performed. DNA was isolated from sponge material that had been collected near Rovinj (Adriatic Sea), Helgoland (North Sea), and Kiel (Baltic Sea) and was amplified with bacterial primers by PCR. The data gathered indicate that in all samples bacteria belonging to the genus Rhodobacter (Proteobacteria, subdivision α) are dominant, suggesting that these bacteria live in symbiotic relationship with the sponge. In addition, the results show that the different samples taken contain further bacterial species, some of them belonging to the same genus even though found in sponges from different locations. The possibility of the presence of toxic bacteria was supported by the finding that organic extracts prepared from sponge samples displayed toxicity, when analyzed in vitro using leukemia cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002270050273
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  • 4
    Electronic Resource
    Electronic Resource
    Is patellar replacement necessary in total knee endoprostheses? (1998)
    Springer
    Der Orthopäde 27 (1998), S. 637-641 
    Details
    ISSN: 1433-0431
    Keywords: Key words Total knee arthroplasty • Patellar replacement • Remodelling • Long term follow-up ; Schlüsselwörter Knietotalendoprothetik • Patellaersatz • Remodelling • Langzeitergebnisse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In der Totalendoprothetik des Kniegelenks ist die Patellarückfläche ein wesentliches Langzeitproblem. Die Diskussion, ob die Patellarückfläche ersetzt werden soll, oder nicht, bleibt kontrovers. Wir berichten über unsere Erfahrungen mit der „De Puy New Jersey LCS-Knieprothese“, die wir seit 1990 in über 700 Kniegelenken prinzipiell ohne Ersatz der Patellarückfläche implantiert haben. Seit mitte 1990 wurde standardisiert ein lateraler Zugang mit Osteotomie der Tuberositas tibiae verwendet. Die Patella wurde entweder von den Randosteophyten befreit, aus Narbensträngen lysiert oder vollständig unberührt gelassen. Die Patellarückfläche wurde in keinem Fall primär prothetisch versorgt. Die Erfahrung in den letzten 7 Jahren bezüglich des Femoropatellargelenks sind durchwegs erfreulich. Kein einziges Kniegelenk mußte wegen sekundär aufgetretenen femoropatellaren, nichttraumatischen Problemen revidiert werden. Radiologisch zeigt sich im Verlauf eine ossäre Remodellierungstendenz der Patella, die sich so dem Prothesendesign anpaßt. Parallel dazu hält oder verbessert sich die Kniegelenkfunktion (gemessen mit dem New Jersey Knee Score) kontinuierlich.
    Notes: Summary As shown in long term follow-up studies of Total Knee Arthroplasty (TKA), the femoropatellar joint is an important problem. We report our experience over the past seven years not having resurfaced the patella at the primary TKA at all. Between 1990 and 1997 more than 700 consecutive TKA with the De Puy New Jersey LCS® prosthesis were performed. A standardised lateral approach with osteotomy of the tibial tuberosity was used. The patella was redressed, either denervated or left untouched. In no case a primary patellar resurfacing was performed. X-rays of the patello-femoral joint showed a remodelling of the patella over the years, nicely matching the condylar design of the femoral prosthesis. Using a blood-supply-preserving approach and a biomechanically adequate implant, TKA without patellar replacement gives excellent long-term results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00003539
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  • 5
    Electronic Resource
    Electronic Resource
    The effect of manual therapy in acute low back pain (LBP) (1998)
    Springer
    Manuelle Medizin 36 (1998), S. 233-240 
    Details
    ISSN: 1433-0466
    Keywords: Key words Acute low back pain • Manual therapy • Spinal measurements • Triflexometer ; Schlüsselwörter Akute Lumbalgie • Manualtherapie • Messungen der Wirbelsäule • Triflexometer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 14 Patienten mit akuter Lumbalgie wurde der Effekt der Manualtherapie mit Hilfe des Triflexometers, eines elektromechanischen Meßgeräts zur Überprüfung der Form und Funktion der Wirbelsäule untersucht. Mit diesem Gerät ist es möglich, die Ruhestellung der Wirbelsäule ebenso wie ihre Beweglichkeit zu messen und auch lokalisierte Bewegungsstörungen aufzuzeichnen. Bei unseren Untersuchungen wurden die Messungen der Wirbelsäule von C7–S2 in der sagittalen und in der frontalen Ebene vorgenommen. Bei allen Patienten konnte nach den manualtherapeutischen Eingriffen durch die Triflexometermessung eine Besserung der Beweglichkeit sowohl bei der Ante- wie Retroflexion und der Lateralflexion nach beiden Seiten nachgewiesen werden, wobei auch lokalisierte Funktionsstörungen partiell oder komplett verschwanden. Die Studie zeigt, daß es mit Hilfe des Triflexometers möglich ist, die Effekte der Manualtherapie bei akuter Lumbalgie rasch zu erfassen und zu dokumentieren. Der Nachweis noch vorhandener lokalisierter Funktionsstörungen nach manueller Therapie könnte darauf hindeuten, daß bei diesen Patienten ein erhöhtes Risiko neu auftretender Lumbalgien und eventuell einer Chronifizierung der Lumbalgie vorhanden ist und deshalb ggf. noch zusätzliche Maßnahmen getroffen werden müssen.
    Notes: Summary In 14 patients with acute LBP the effect of manual therapy was examined. The examination was conducted with the Triflexometer, which is an electromechanical measuring instrument for examination of the posture and function of the spine. This instrument makes possible the measurement of the spine in resting as well as in moving positions, and it is also suitable for recording local disturbances of the movement. In our study we measured the spine from C7 to S2 in the sagittal and frontal planes. Improvement in movement was detected in all patients following manual therapy, as well as in ante-, retro- and lateral flexion on both sides, and local functional disturbances also disappeared partially or totally. Our study shows that the Triflexometer makes it possible to record the effect of manual therapy in acute LBP. The proof of the local functional disturbances after manual therapy indicates that these patients have a higher risk of new episodes of acute LBP or perhaps of chronic LBP, and because of that there it is necessary to use other treatment forms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003370050080
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  • 6
    Electronic Resource
    Electronic Resource
    The trace class conjecture in the theory of automorphic forms. II (1998)
    Springer
    Geometric and functional analysis 8 (1998), S. 315-355 
    Details
    ISSN: 1420-8970
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract. Let G be the group of real points of a reductive algebraic $ \Bbb {Q} $ -group satisfying the assumptions made in [H, Chapter I] and let $ \Gamma $ be an arithmetic subgroup of G. Let $ R_{\Gamma} $ be the right regular representation of G on $ L^2(\Gamma \backslash G) $ and denote by $ R^d_\Gamma $ the restriction of $ R_\Gamma $ to the discrete subspace. In this paper we prove that for every integrable rapidly decreasing function f on G, the operator $ R^d_\Gamma (f) $ is of the trace class.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000390050059
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  • 7
    Electronic Resource
    Electronic Resource
    Interdisziplinäre Gruppentherapie für die Fibromyalgie (1998)
    Springer
    Zeitschrift für Rheumatologie 57 (1998), S. 89-94 
    Details
    ISSN: 0340-1855
    Keywords: Schlüsselwörter Fibromyalgie ; Gruppentherapie ; Psychotherapie ; Key words Fibromyalgia ; group treatment ; psychotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Fibromyalgia is present in 2% of the general population and leads to impairment by chronic pain and fatigue. It does not improve without therapy directed at the symptoms of fibromyalgia. We describe our interdisciplinary group treatment for patients with fibromyalgia. They received a physical examination, ergometry and psychometric tests both at admission and before discharge, and they were questioned to the degree and localization of their pain, to fatigue, sleeping disorders and functional symptoms. Therapy included information about fibromyalgia, learning of coping strategies, relaxation and endurance training. Our results show that our interdisciplinary group treatment is effective for fibromyalgia and improves anxiety, depression and well being after a period of 5 weeks of in-patient rehabilitation.
    Notes: Zusammenfassung Die Fibromyalgie betrifft 2% der Bevölkerung und führt bei den Betroffenen zu einer deutlichen Beeinträchtigung durch chronische Schmerzen und Müdigkeit. Ohne gezielte Therapie bessern sich die Symptome der Fibromyalgie nicht. Wir behandelten Fibromyalgiepatienten interdisziplinär in Gruppen. Dabei wurden die Patienten bei Aufnahme und vor Entlassung ärztlich, leistungsphysiologisch und psychometrisch untersucht und zur Ausprägung und Lokalisation ihrer Schmerzen, zu ihrer Müdigkeit, Schlafstörungen und funktionellen Symptomen befragt. Die Behandlung schloß Informationen zum Krankheitsbild, Erlernen von Bewältigungsstrategien, Entspannungstechniken und Ausdauertraining ein. Unsere Untersuchungen zeigen, daß die ärztlich und psychologisch geleitete interdisziplinäre Gruppentherapie in der Behandlung der Fibromyalgie effektiv ist und am Ende der 5-wöchigen Behandlungsdauer Angst, Depression und Befindlichkeit der Fibromyalgiepatienten bessert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003930050065
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  • 8
    Electronic Resource
    Electronic Resource
    Spinal factors in the generation of fibromyalgia syndrome (1998)
    Springer
    Zeitschrift für Rheumatologie 57 (1998), S. S36 
    Details
    ISSN: 0340-1855
    Keywords: Key words Fibromyalgia ; spinal column ; Schlüsselwörter Fibromyalgie ; Wirbelsäule
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei der Fibromyalgie beobachtet man in gleicher Weise wie bei unspezifischen chronischen Lumbalgien klinisch und röntgenologisch sehr häufig Haltungsstörungen der Wirbelsäule, insbesondere Skoliosen. Darüber hinaus lassen sich ebenfalls bei beiden Erkrankungen in einem hohen Prozentsatz segmentale oder ausgedehnte Funktionsstörungen des Achsenorgans nachweisen. Vermutlich sind die Wirbelsäulenveränderungen oft für die Erstmanifestation der Fibromyalgie verantwortlich, die sich ja meist monolokulär vor allem in der Lumbal- und Cervicalregion findet. Die spätere Ausbreitung der Schmerzen erfolgt wahrscheinlich auf neuralen und muskulären Wegen, wobei psychische Faktoren akzentuierend wirken dürften.
    Notes: Summary In fibromyalgia as well as in low back pain we frequently find disturbances of the posture of vertebral column clinically and radiologically. Also, reduction in the mobility of whole spine and localized movement impairments in both conditions was present. It is likely that the disturbances are responsible for the first manifestations of fibromyalgia in a single localization, especially in lumbar and cervical regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003930050232
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  • 9
    Electronic Resource
    Electronic Resource
    Electrochemical characterisation of laser welding tracks (1998)
    Springer
    Fresenius' journal of analytical chemistry 361 (1998), S. 662-666 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The advantages of laser welding are high process velocity, the possibility to joint alloys, which are not solderable, and the high bonding strength. During the laser welding process a high energy input in a very short time and a small area is performed, resulting in possible changes of structure and composition. Direct information of the change of the electrochemical behaviour of dental alloys after Laser welding procedure does not exist. The aim of this work was, therefore, to assess the electrochemical behaviour of laser welded joints in comparison with the bulk material using the mini-cell system. The logI vs. E curves performed on the bulk material show a complete change concerning the characteristic data, the shape and the position in comparison to such curves measured on the laser track. The characterisation of the electrochemical behaviour of laser welding tracks seems to be very easy by using the mini-cell system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160050985
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  • 10
    Electronic Resource
    Electronic Resource
    On the origin of surface states in a correlated local-moment film (1998)
    Springer
    The European physical journal 2 (1998), S. 249-257 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 75.70.-i Magnetic films and multilayers - 73.20.At Surface states, band structure, electron density of states - 75.50.Pp Magnetic semiconductors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The electronic quasiparticle structure of a ferromagnetic local moment film is investigated within the framework of the s-f model. For the special case of a single electron in an otherwise empty energy band being exchange coupled to a fully ordered localised spin system the problem can be solved exactly and, for the spin- electron, some marked correlation effects can be found. We extend our model to incorporate the influence of the surface on the electronic structure. Therefore we modify the hopping integrals in the vicinity of the surface. This leads to the existence of surface states, both for the spin- and the spin- spectral density of states. The interplay between the modification of the hopping integrals and the existence of surface states and correlation effects is discussed in detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510050247
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