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  • 1
    Electronic Resource
    Electronic Resource
    Anal sphincter reconstruction: Anterior overlapping muscle repair (1991)
    Springer
    Diseases of the colon & rectum 34 (1991), S. 739-743 
    Details
    ISSN: 1530-0358
    Keywords: Anal incontinence ; Sphincter reconstruction ; Perineal drain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Anal sphincter reconstruction for anal incontinence was performed in 55 women between 1973 and 1987 at The Jewish Hospital of St. Louis. The mean age was 34 years (range, 22–75 years). Incontinence was due to obstetric injury in 48 patients and to fistulotomy in 7 patients. Patients suffered from complete incontinence (41), incontinence of liquid stool and flatus (11), or incontinence of flatus only (3). All patients underwent an anterior overlapping sphincter muscle reconstruction, and one patient also had a posterior repair. Complete continence was restored in 28 patients, and partial continence was achieved in 24 patients. Only three patients remained totally incontinent. Clinical assessment did not accurately reflect functional outcome after 1 year of follow-up. No factor predicting outcome was found retrospectively. Clinical assessment of a patient's outcome may be inaccurate unless specific questions are asked. The use of a perineal drain reduced infection but did not affect outcome. Previous repair or associated rectovaginal fistula does not affect outcome. Sphincter injury owing to fistula disease may result in poor outcome after repair.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02051061
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    A Discrete Maintenance and Replacement Model under Technological Breakthrough Expectations (2000)
    Springer
    Annals of operations research 99 (2000), S. 351-372 
    Details
    ISSN: 1572-9338
    Keywords: machine maintenance ; machine replacement ; sep optimal control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract Two cases of the discrete time finite horizon technology replacement problem are solved. The first deals with two available machines, one in use and a better one that can be purchased to replace it. The second case considers, in addition, a third machine of future technology that will be available at some random future time. The maintenance level of each used machine is chosen for each period in order to economically control performance deterioration. For solving the model, we first derive an optimal preventive maintenance policy by showing that “bang-bang” (i.e., full or non), non-increasing, maintenance efforts are optimal. Employing the optimal maintenance policy, we reformat the problem and conduct a numerical search in order to derive the replacement policy that will maximize the expected net present profit. Numerical examples demonstrate that management may improve profitability by delaying (but not necessarily foregoing) replacement with an available better machine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019236203575
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    Paper (German National Licenses)
    Fulltext
  • 3
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    New evidence of Melithaea erythraea colonization in the Mediterranean (2020)
    Elsevier
    Details
    Publication Date: 2023-02-08
    Description: Highlights: • A stable population of a migrant octocoral was found on a natural substrate. • No genetic differences were found between Mediterranean and the Red Sea specimens. • The bacterial epibiota has undergone change following migration. • Stable-isotope analysis suggests no nutritional barrier to migration for the coral. • Larval connectivity model supports Port of Hadera origin of expansion hypothesis. Abstract: The Indo-Pacific gorgonian coral Melithaea erythraea (Melithaeidae, previously Acabaria) was first recorded in the Mediterranean in 1999 in the harbor of the Hadera power station, Israel. This species is the only octocoral known to have invaded the Mediterranean Sea. In the past two decades, it has demonstrated a stable population in this harbor, and never found outside this location, not even on the adjacent natural rocky reefs. Then, during 2015, several specimens of M. erythraea were found on a natural substrate at Nahsholim, Israel, about 23 km north of the power station. This is the first evidence of this coral's existence beyond the power plant harbor. The number of colonies there suggests that the population is sustainable, but further study is needed. Although no genetic differences were found among specimens from Nahsholim, Hadera, and the Red Sea, their bacterial epibiota has undergone change following migration. The carbon source and trophic position are similar between the Red Sea and the Mediterranean, suggesting that there is no nutritional barrier to migration for the coral. The larval connectivity model supports the hypothesis that the planulae that have settled in Nahsholim originated from the Port of Hadera, although other arrival scenarios are also possible. The spread of this species suggests that the eastern Mediterranean is becoming increasingly suitable for migrating corals, joining the many other Indo-Pacific migrants that have already established populations there.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Ocean warming is the key filter for successful colonization of the migrant octocoral Melithaea erythraea (Ehrenberg, 1834) in the Eastern Mediterranean Sea (2020)
    PeerJ
    Details
    Publication Date: 2023-02-08
    Description: Climate, which sets broad limits for migrating species, is considered a key filter to species migration between contrasting marine environments. The Southeast Mediterranean Sea (SEMS) is one of the regions where ocean temperatures are rising the fastest under recent climate change. Also, it is the most vulnerable marine region to species introductions. Here, we explore the factors which enabled the colonization of the endemic Red Sea octocoral Melithaea erythraea (Ehrenberg, 1834) along the SEMS coast, using sclerite oxygen and carbon stable isotope composition (delta O-18(SC) and delta C-13(SC)), morphology, and crystallography. The unique conditions presented by the SEMS include a greater temperature range (similar to 15 degrees C) and ultra-oligotrophy, and these are reflected by the lower delta C-13(SC) values. This is indicative of a larger metabolic carbon intake during calcification, as well as an increase in crystal size, a decrease of octocoral wart density and thickness of the migrating octocoral sclerites compared to the Red Sea samples. This suggests increased stress conditions, affecting sclerite deposition of the SEMS migrating octocoral. The delta(OSC)-O-18 range of the migrating M. erythraea indicates a preference for warm water sclerite deposition, similar to the native depositional temperature range of 21-28 degrees C. These findings are associated with the observed increase of minimum temperatures in winter for this region, at a rate of 0.35 +/- 0.27 degrees C decade(-1) over the last 30 years, and thus the region is becoming more hospitable to the IndoPacific M. erythraea. This study shows a clear case study of "tropicalization" of the Mediterranean Sea due to recent warming.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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