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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 37 (1999), S. 0 
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: One of the challenges of monitoring network design in a fractured rock setting is the heterogeneity of the rocks. This paper summarizes the activities and problems associated with the monitoring of contaminated groundwater in porous, low-permeability fractured chalk in the Negev Desert, Israel. Preferential flow documented in the study area required siting the monitoring boreholes in the predominant fracture systems. Lineaments traced from aerial photographs were examined in the field to sort out the large-extension, through-going, multilayer fracture systems crossing the study area. At each proposed drilling site, these fractures were exposed below the sediment cover using trenches. Slanted boreholes were drilled at a distance from the fracture systems so that each borehole would intersect the targeted fracture plane below the water table. Based on their short recovery period and contaminated ground water, these newly drilled, fracture-oriented boreholes appeared to be better connected to preferential flowpaths crossing the industrial site than the old boreholes existing on site. Other considerations concerning the drilling and logging of monitoring boreholes in a fractured media were: (1) coring provides better documentation of the vertical fracture distribution, but dry augering is less costly and enables immediate ground water sampling and the sampling of vadose rock for contaminant analysis; (2) caliper and TV camera logs appear to provide only partial information regarding the vertical fracture distribution; and (3) the information gained by deepening the monitoring boreholes and testing fractures crossing their uncased walls has to be carefully weighed against the risk of potential cross-contamination through the monitoring boreholes, which is enhanced in fractured media.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The homes of 120 patients with asthma, 57 in Vancouver and 63 in Winnipeg, were studied. The characteristics of the homes were assessed by a questionnaire. Dust samples were collected and the indoor relative humidity was measured four times during the year covering all four seasons in both cities. Mite allergen levels were determined using monoclonal antibodies against Der p I and Der f I by the ELISA method. The mean levels of both mite allergens in mattress and floor samples in the homes in Vancouver and in Winnipeg were relatively low for all seasons. Mite allergen levels were found to be associated with city, season and individual home differences. They were significantly higher in Vancouver than in Winnipeg. Der p I and Der f I in mattress samples in both cities and Der f I in floor samples in Vancouver, varied by season. The indoor relative humidity level in the homes in Vancouver were also significantly higher than those in Winnipeg. There was, however, no significant association between the levels of indoor relative humidity and the levels of mite allergens after adjusting for variations in city, season and individual home. Although individual home differences were highly associated with mite allergen levels, only a few home characteristics were found to be related to mite allergen levels such as the type and the age of the home, the type of heating, the use of feather pillows and the number of occupants in the homes. Whether low levels of mite allergens are partially responsible for the relatively low prevalence of childhood asthma in Canada remains to be investigated.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 20 (1997), S. 0 
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract— This paper presents the results of an experimental testing programme to examine the uniaxial creep, low cycle fatigue and creep/fatigue interaction behaviour of a Ni-base superalloy at 700°C. The material is used in the manufacture of aeroengine turbine discs. A creep continuum damage mechanics model is shown to be capable of accurately predicting the creep and creep rupture behaviour of the material. A healing term has been incorporated into the damage mechanics model to allow the behaviour under creep/fatigue conditions to be described.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 163 (1953), S. 494-498 
    ISSN: 1434-4726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 118 (1941), S. 695-705 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Es wird die Einwirkung von α-Strahlen auf normale Selenphotoelemente verfolgt mit der Absicht, mit diesen intensiven Energieträgern im wesentlichen diejenige Zone — Randschicht — zu erfassen, welche für die charakteristischen Eigenschaften dieser Leiter-Halbleitersysteme als verantwortlich betrachtet wird und deren strukturelle Ergründung fortgesetzte Aufgabe des Experiments ist. Es findet sich, daß die α-Strahlung selbst in der verwandten Stärke keine meßbare elektromotorische Wirkung besitzt, daß sie aber die Photowirkung in einer Weise herabsetzt, die einer zeitlich schnell fortschreitenden, nahe vollständigen und nicht rückgängigen Zerstörung der für die Photowirkung maß-gebenden Bedingungen gleichkommt. Die Ursache dieser Erscheinung liegt, soweit bisher geprüft, weder in Veränderungen der optischen Eigenschaften, noch in groben Modifikationsänderungen des Selens. Auch sind elektrische Veränderungen im Gesamtmaterial des Halbleiters offenbar von nicht wesentlichem Einfluß, da die Wirkung ausschließlich der α-Strahlung zukommt, während intensive γ-Bestrahlung vergleichsweise bedeutungslos bleibt.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 165 (1954), S. 229-235 
    ISSN: 1434-4726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. In a randomized study, prevention of goiter recurrence with l-thyroxine was compared with pure iodide substitution after thyroid surgery for nodular goiter in an iodine-deficient area. Altogether 107 patients were followed up for 52 weeks after thyroid resection. The thyroid volume was determined sonographically. Free thyroxine, total thyroxine, thyrotropin, thyroglobulin, and antibodies to thyroglobulin and thyroid peroxidase were measured. The thyroid volume decreased slightly over the course of a year in the two therapy groups. There was no significant difference between the two groups. Recurrences were seen with both l-thyroxine medication and iodide substitution. The thyroglobulin levels fell significantly over the 52-week follow-up period in the iodide group. Antibody formation was not observed under iodine substitution. In an area of iodine deficiency, substitution with iodide is just as effective as medicating the patients with l-thyroxine for preventing recurrences.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 118 (1941), S. 357-374 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Es wird ein auf kleinsten Gehalt noch weit unterhalb 0,01 mg Ra-Äquiv. anwendbares Verfahren zur raschen quantitativen Bestimmung von Ra, MTh und Ra Th in einem beliebigen Gemisch dieser Stoffe beschrieben und seine Leistungsfähigkeit und Zuverlässigkeit durch eine eingehende systematische Untersuchung nachgewiesen. Dasselbe besteht in einer kombinierten Anwendung von Emanations-undγ-Strahlmessungen an Lösungen unter Berücksichtigung der besonderen Verhältnisse, welche die Gegenwart von Thor-Emanation mit sich bringt.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 122 (1944), S. 49-61 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Es wird die Lichtdurchlässigkeit von durch Kathodenzerstäubung hergestellten amorphen roten Selenschichten verschiedener Dicke im sichtbaren Gebiet und im anschließenden Ultrarot bis gegen 5 μ hin systematisch untersucht und ihre Abhängigkeit von der Temperatur zwischen − 150 und + 150° C verfolgt. Wenn auch die Genauigkeit der quantitativen Einzelergebnisse offenbar durch die Schwierigkeit der Dickenbestimmung und durch geringe, aus der Herstellungsweise der Schichten sich ergebende strukturelle Verschiedenheiten derselben beschränkt ist, so führt doch die mögliche einheitliche Zusammenfassung des umfangreichen Beobachtungsmaterials zu einer einwandfreien Kenntnis des durchschnittlichen Verhaltens des untersuchten Stoffes. Der festgestellte Temperatureinfluß besteht in einer mit abnehmender Temperatur erheblich steigenden Begünstigung der Durchlässigkeit nach kürzeren Wellen kin, während er im langwelligen Gebiet stark zurücktritt.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1433-0563
    Keywords: Key words Impotence • Veins • Penile venous surgery • Penile erection ; Schlüsselwörter Impotenz • Penile Venenchirurgie • Prognosefaktoren
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In den letzten Jahren wurde vermehrt über schlechtere Langzeiterfolge der Penisvenenchirurgie bei venösem Leck berichtet. Dies veranlaßte uns, unser Patientenkollektiv von 126 Patienten, die zwischen 1987 und 1996 einer dorsalen Penisvenenligatur unterzogen wurden, im Rahmen einer erneuten klinischen Visite oder durch ein standardisiertes Telefoninterview bzw. einen Fragebogen im Langzeit-Follow-up zu evaluieren. Den klinischen Ausgang teilten wir in folgende 3 Gruppen ein: volle spontane Erektion, postoperatives Ansprechen auf Schwellkörperautoinjektionstherapie (SKAT) und keine Veränderung der Erektionsfähigkeit postoperativ. Der Kurzzeiterfolg nach 1–3 Monaten betrug auf diese Gruppen bezogen 31 (24,6 %), 25 (19,8 %) und 70 (55,6 %) Patienten. Nach einer Langzeitbeobachtung von 6–76 Monaten (Mittelwert 33 ± 19,6) verschlechterten sich diese Werte auf 14 (11,2 %), 24 (19 %) und 88 (69,8 %) Patienten. Eine erneute Verschlechterung eines anfänglichen Operationserfolges trat in 86 % der Fälle innerhalb des ersten postoperativen Jahres auf (p K 0,001). Als günstige Prognosefaktoren konnten wir ein präoperatives Bestehen der Erektionsstörung unter 7 Jahre, ein normales Corpus-cavernosum-Elektromyogramm (CC-EMG) und ein Maintenance-Flow unter 45 ml/min bestimmen. Waren alle drei Parameter gegeben, so stieg die Langzeiterfolgsrate (spontane Erektion plus SKAT-Responder) von 30 % im gesamten Patientengut auf 67 % bei diesem günstigen Patientenkollektiv (p K 0,001). Diese Studie zeigt, daß die Langzeiterfolge der DPVL bei nicht-selektionierten Patienten enttäuschend sind, eine Selektion der Patienten jedoch mit bestimmten Prognosefaktoren vorgenommen werden kann.
    Notes: Summary Poor longterm success has been reported for penile vein ligation the last few years. Therefore, we decided to re-investigate our group of 147 patients who were operated on between 1987 and 1996. All patients showed a negative response to intracavernous injection therapy at the time of diagnosis and revealed a maintenance flow 〉 15 ml/min, as well as a pathological venous flow with pharmacocavernosometry or pharmacocavernosography. These patients underwent ligation of all superficial dorsal veins and resection of the deep dorsal vein of the penis. An up-to-date record of the success of the operation was kept either by a renewed clinical visit or by a standardized telephone interview or questionnaire. A total of 126 patients were available here for long-term follow-up. We divided the findings into three groups: complete spontaneous erection, postoperative response to cavernous auto-injection therapy and no changes in erectile competency postoperatively. The short-term success rate for these groups after 1–3 months was an outcome of 31 (24.6 %), 25 (19.8 %) and 70 (55.6 %) patients; 86 % of the cases whose results deteriorated after the initial operation success rate had this happen within the first postoperative year (p K 0.001). Favorable prognostic factors were preoperative erectile dysfunction of K 7 years, a normal CC-EMG and a maintenance flow of K 45 ml/min. If all three parameters were present, the long-term success rate (spontaneous erection plus response to intracavernous injection) of 30 % of all patients was found to rise to 67 % in this selected group of patients (p K 0.001). This study reveals that long-term success for unselected patients undergoing penile venous surgery is disappointing; however, careful selection of patients by certain prognostic factors can improve long-term results.
    Type of Medium: Electronic Resource
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