70. A Full-Scale Experimental Apparatus to Study MDR-TB Transmission

2006 ◽  
Author(s):  
S. Parsons ◽  
P. Jensen ◽  
C. Wells ◽  
M. First ◽  
E. Nardell ◽  
...  
2006 ◽  
Author(s):  
S. Parsons ◽  
P. Jensen ◽  
C. Wells ◽  
M. First ◽  
E. Nardell ◽  
...  

2008 ◽  
Vol 15 (6) ◽  
pp. 687-696 ◽  
Author(s):  
John Leavitt ◽  
James E. Bobrow ◽  
Faryar Jabbari

This paper describes the design of a novel actuator capable of protecting a full scale structure from severe load conditions. The design includes a cylinder filled with pressurized nitrogen and uses commercially available components. We demonstrate that the actuator behaves like a spring with an adjustable unstretched length, and that the effective spring stiffness can be changed easily by changing the initial cylinder pressure. In order to test the actuator on a full scale structure, an effective spring constant of approximately 10,000 pounds/inch was required over a two inch stroke. Because of the spring-like behavior, rather than damper-like behavior, the actuator does not transmit high forces to a vibrating structure like linear viscous dampers do when velocities are high. We analyze features of critical importance to the design of the actuator such as the cylinder dimensions, operating pressure, and valve selection. We then investigate the performance using a novel experimental apparatus that mimics the dynamics of a single story building, but has 1/400 the weight.


1999 ◽  
Vol 20 (02) ◽  
pp. 146-147
Author(s):  
Gina Pugliese ◽  
Martin S. Favero
Keyword(s):  

2011 ◽  
Vol 68 (7) ◽  
pp. 365-368 ◽  
Author(s):  
Otto Brändli ◽  
Jean Pierre Zellweger
Keyword(s):  
Mdr Tb ◽  

Die Tuberkulose (TB) ist heute in der Schweiz zwar eine seltene Krankheit mit nur noch 2.8 Neuerkrankungen pro Jahr unter Schweizern. Sie kommt aber mit einem Anteil von 70 % in ausländischen Bevölkerungsgruppen noch relativ häufig vor. Nachdem die Gesamtzahlen während über 100 Jahren rückläufig waren, wurde zwischen 2007 und 2009 eine Zunahme von 478 auf 556 Fälle beobachtet, deren Ursache unklar bleibt. Das Auftreten von multiresistenten Formen (1.4 % MDR- TB) und die verzögerte Diagnosestellung erfordern weiterhin die volle Aufmerksamkeit der Ärzte und der Gesundheitsbehörden. Die Lungenligen engagieren sich bei der Umgebungsuntersuchung und Behandlung der TB und unterstützen die Ärzte mit dem „TB-Handbuch“ und einer Gratis-Hotline.


2000 ◽  
Vol 16 (2) ◽  
pp. 107-114 ◽  
Author(s):  
Louis M. Hsu ◽  
Judy Hayman ◽  
Judith Koch ◽  
Debbie Mandell

Summary: In the United States' normative population for the WAIS-R, differences (Ds) between persons' verbal and performance IQs (VIQs and PIQs) tend to increase with an increase in full scale IQs (FSIQs). This suggests that norm-referenced interpretations of Ds should take FSIQs into account. Two new graphs are presented to facilitate this type of interpretation. One of these graphs estimates the mean of absolute values of D (called typical D) at each FSIQ level of the US normative population. The other graph estimates the absolute value of D that is exceeded only 5% of the time (called abnormal D) at each FSIQ level of this population. A graph for the identification of conventional “statistically significant Ds” (also called “reliable Ds”) is also presented. A reliable D is defined in the context of classical true score theory as an absolute D that is unlikely (p < .05) to be exceeded by a person whose true VIQ and PIQ are equal. As conventionally defined reliable Ds do not depend on the FSIQ. The graphs of typical and abnormal Ds are based on quadratic models of the relation of sizes of Ds to FSIQs. These models are generalizations of models described in Hsu (1996) . The new graphical method of identifying Abnormal Ds is compared to the conventional Payne-Jones method of identifying these Ds. Implications of the three juxtaposed graphs for the interpretation of VIQ-PIQ differences are discussed.


1996 ◽  
Vol 12 (1) ◽  
pp. 27-32 ◽  
Author(s):  
Louis M. Hsu

The difference (D) between a person's Verbal IQ (VIQ) and Performance IQ (PIQ) has for some time been considered clinically meaningful ( Kaufman, 1976 , 1979 ; Matarazzo, 1990 , 1991 ; Matarazzo & Herman, 1985 ; Sattler, 1982 ; Wechsler, 1984 ). Particularly useful is information about the degree to which a difference (D) between scores is “abnormal” (i.e., deviant in a standardization group) as opposed to simply “reliable” (i.e., indicative of a true score difference) ( Mittenberg, Thompson, & Schwartz, 1991 ; Silverstein, 1981 ; Payne & Jones, 1957 ). Payne and Jones (1957) proposed a formula to identify “abnormal” differences, which has been used extensively in the literature, and which has generally yielded good approximations to empirically determined “abnormal” differences ( Silverstein, 1985 ; Matarazzo & Herman, 1985 ). However applications of this formula have not taken into account the dependence (demonstrated by Kaufman, 1976 , 1979 , and Matarazzo & Herman, 1985 ) of Ds on Full Scale IQs (FSIQs). This has led to overestimation of “abnormality” of Ds of high FSIQ children, and underestimation of “abnormality” of Ds of low FSIQ children. This article presents a formula for identification of abnormal WISC-R Ds, which overcomes these problems, by explicitly taking into account the dependence of Ds on FSIQs.


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