204 World-wide trends in the incidence of cancer of the pancreas in relation to the incidence of endocrine tumors at other sites

1983 ◽  
Vol 19 ◽  
pp. 68
Author(s):  
A.M. Walker
Keyword(s):  
World Wide ◽  
Endocrine Tumors ◽  
Incidence Of Cancer ◽  
Cancer Of The Pancreas

Ricerche sulla Familiarità delle Neoplasie delle Vie Biliari e del Pancreas

1965 ◽  
Vol 14 (S1) ◽  
pp. 14-22
Author(s):  
A. Maltarello ◽  
P. E. Beolchini ◽  
V. Gualandri
Keyword(s):  
Cancer Patients ◽  
Digestive System ◽  
Familial Occurrence ◽  
Patients With Cancer ◽  
Incidence Of Cancer ◽  
Cancer Of The Pancreas ◽  
Biliary Ducts ◽  
Healthy Persons

SUMMARYThe AA. have undertaken a study on the familial occurrence of cancer cases in the families of 142 patients with cancer of the biliary ducts, and of 208 patients with cancer of the pancreas, in comparison with the families of equal numbers of healthy persons (controls). On the basis of the collected data, neither for the cases of cancer of the pancreas nor for the cases of cancer of the biliary ducts, a higher incidence of cancer (both same site or all sites) than in the families of the controls has been observed. On the contrary, a significantly higher incidence of cancer of the digestive system has been demonstrated in the families of the two groups of cancer patients taken together.

Rotational Characteristics of the Green Solar Corona: 1947-1991

1994 ◽  
Vol 144 ◽  
pp. 139-141 ◽  
Author(s):  
J. Rybák ◽  
V. Rušin ◽  
M. Rybanský
Keyword(s):  
Solar Corona ◽  
World Wide ◽  
Rotation Period ◽  
Original Data ◽  
Coronal Emission ◽  
Time Intervals ◽  
Data Set ◽  
The World ◽  
Coronal Emission Line ◽  
Homogeneous Data

AbstractFe XIV 530.3 nm coronal emission line observations have been used for the estimation of the green solar corona rotation. A homogeneous data set, created from measurements of the world-wide coronagraphic network, has been examined with a help of correlation analysis to reveal the averaged synodic rotation period as a function of latitude and time over the epoch from 1947 to 1991.The values of the synodic rotation period obtained for this epoch for the whole range of latitudes and a latitude band ±30° are 27.52±0.12 days and 26.95±0.21 days, resp. A differential rotation of green solar corona, with local period maxima around ±60° and minimum of the rotation period at the equator, was confirmed. No clear cyclic variation of the rotation has been found for examinated epoch but some monotonic trends for some time intervals are presented.A detailed investigation of the original data and their correlation functions has shown that an existence of sufficiently reliable tracers is not evident for the whole set of examinated data. This should be taken into account in future more precise estimations of the green corona rotation period.

Electron Microscopy of Silicon Nitride-Based Ceramics

1991 ◽  
Vol 49 ◽  
pp. 926-927
Author(s):  
Gareth Thomas
Keyword(s):  
Electron Microscopy ◽  
High Temperature ◽  
Silicon Nitride ◽  
World Wide ◽  
Sintering Temperature ◽  
Liquid Phase Sintering ◽  
High Temperature Strength ◽  
Sintering Additives ◽  
Glass Forming ◽  
Dense Product

Silicon nitride and silicon nitride based-ceramics are now well known for their potential as hightemperature structural materials, e.g. in engines. However, as is the case for many ceramics, in order to produce a dense product, sintering additives are utilized which allow liquid-phase sintering to occur; but upon cooling from the sintering temperature residual intergranular phases are formed which can be deleterious to high-temperature strength and oxidation resistance, especially if these phases are nonviscous glasses. Many oxide sintering additives have been utilized in processing attempts world-wide to produce dense creep resistant components using Si3N4 but the problem of controlling intergranular phases requires an understanding of the glass forming and subsequent glass-crystalline transformations that can occur at the grain boundaries.

The Diagnosis of Cancer of the Pancreas, Biliary Tract, and Duodenum by Combined Cytologic and Secretory Methods

1958 ◽  
Vol 34 (6) ◽  
pp. 996-1008 ◽  
Author(s):  
Howard F. Raskin ◽  
Julius Wenger ◽  
Manuel Sklar ◽  
Sylvia Pleticka ◽  
Willard Yarema
Keyword(s):  
Biliary Tract ◽  
Cancer Of The Pancreas ◽  
Diagnosis Of Cancer

Internet Addiction: Ein Literaturüberblick

2002 ◽  
Vol 48 (1) ◽  
pp. 29-46 ◽  
Author(s):  
Ralf Demmel
Keyword(s):  
World Wide Web ◽  
Internet Addiction ◽  
World Wide ◽  
Psychische Störungen ◽  
Online Gambling ◽  
Online Relationships ◽  
E Mail

Zahlreiche Falldarstellungen sowie die Ergebnisse einer Reihe empirischer Untersuchungen lassen vermuten, dass die exzessive Nutzung von Onlinediensten mit erheblichen Beeinträchtigungen der Lebensführung einhergehen kann. In der Literatur wird oftmals auf Ähnlichkeiten zwischen der sog. <I>Internet Addiction</I> einerseits und Abhängigkeitserkrankungen oder Störungen der Impulskontrolle andererseits hingewiesen. Die Validität des Konstrukts ist jedoch umstritten. In Abhängigkeit von der jeweiligen Symptomatik können verschiedene Subtypen der Internet»sucht« beschrieben werden:<I><OL><LI>addiction to online sex, <LI>addiction to online gambling, <LI>addiction to online relationships, <LI>addiction to web cruising and e-mail checking</I> und <I><LI>addiction to multi-user dungeons.</OL></I> Zur Prävalenz der Internet»sucht« in der Allgemeinbevölkerung liegen bislang keine zuverlässigen Schätzungen vor. Verschiedene Personenmerkmale (Alter, Geschlecht, psychische Störungen etc.) sowie spezifische Merkmale der verschiedenen Onlinedienste (Anonymität, Ereignishäufigkeit etc.) scheinen das Risiko einer exzessiven und somit möglicherweise schädlichen Nutzung zu erhöhen. Die vorliegenden Daten sind widersprüchlich und erlauben lediglich vorläufige Schlussfolgerungen, da sich die Soziodemographie der Nutzer innerhalb weniger Jahre deutlich verändert hat und darüber hinaus hinsichtlich der Nutzung des World Wide Web nach wie vor erhebliche geographische Ungleichheiten vorausgesetzt werden müssen. Vor dem Hintergrund erheblicher Forschungsdefizite einerseits und zahlreicher »Schnittstellen« andererseits erscheint es naheliegend und dringend notwendig, dass die Forschung auf diesem Gebiet künftig in weitaus stärkerem Maße als bislang von den Fortschritten anderer Disziplinen profitiert. Aufgabe empirischer Forschung sollte neben der Entwicklung reliabler und valider Erhebungsinstrumente und der Durchführung aufwändiger Längsschnittstudien an repräsentativen Zufallsstichproben die Formulierung evidenz-basierter Behandlungsempfehlungen sein.

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