5. Johann Wolfgang Brügels Übersetzung von Gerald Reitlingers The Final Solution

2021 ◽  
pp. 145-190
Keyword(s):  
Author(s):  
Sterling P. Newberry

The beautiful three dimensional representation of small object surfaces by the SEM leads one to search for ways to open up the sample and look inside. Could this be the answer to a better microscopy for gross biological 3-D structure? We know from X-Ray microscope images that Freeze Drying and Critical Point Drying give promise of adequately preserving gross structure. Can we slice such preparations open for SEM inspection? In general these preparations crush more readily than they slice. Russell and Dagihlian got around the problem by “deembedding” a section before imaging. This some what defeats the advantages of direct dry preparation, thus we are reluctant to accept it as the final solution to our problem. Alternatively, consider fig 1 wherein a freeze dried onion root has a window cut in its surface by a micromanipulator during observation in the SEM.


Author(s):  
Geoffrey Karimi Njogu

The article sets out to unveil the challenge of drugs in Njega and Kamuiru secondary schools of Kenya. With drug challenge becoming the single major threat to the entire education system in tropical Africa, the sampling of the two schools will help in opening up the matter for decisive action by the relevant stakeholders. Methodologically, the article begins by theorizing the issues regarding drug menace as it wonders: Why do teens engage in this vice? What are the practical effects of drug abuse? And more importantly, what can we do to arrest the challenge? Even though the article has not given the final solution on how it can comprehensively be tackled, it has however opened up possibilities that can lead to the final onslaught. The materials in this article are gathered via oral interviews, some selected readings, participant observation especially through visiting the specific sites, and through critical analysis.


2000 ◽  
Vol 41 (9) ◽  
pp. 89-95 ◽  
Author(s):  
G. Ladiges ◽  
N-P. Bertram ◽  
R. Otterpohl

The Hamburger Stadtentwässerung (HSE) is planning to take on a further approximately 250,000 PE in addition to the 1.85 m PE already served by its combined wastewater treatment plants at Köhlbrandhöft/Dradenau. To cope with the increased load, a concept for the extension of the plants had to be developed. Various concepts were compared and evaluated using a dynamic computer simulation. The very wide-ranging simulation study showed that the required effluent standards can still be achieved after the volume of the sludge liquor storage capacity has been increased. As many concepts had been assessed in detail, the final solution chosen was considerably less expensive than if the wastewater treatment plants had been extended in a traditional manner.


2020 ◽  
Author(s):  
George L. Mosse
Keyword(s):  

2013 ◽  
Vol 321-324 ◽  
pp. 1947-1950
Author(s):  
Lei Gu ◽  
Xian Ling Lu

In the initialization of the traditional k-harmonic means clustering, the initial centers are generated randomly and its number is equal to the number of clusters. Although the k-harmonic means clustering is insensitive to the initial centers, this initialization method cannot improve clustering performance. In this paper, a novel k-harmonic means clustering based on multiple initial centers is proposed. The number of the initial centers is more than the number of clusters in this new method. The new method with multiple initial centers can divide the whole data set into multiple groups and combine these groups into the final solution. Experiments show that the presented algorithm can increase the better clustering accuracies than the traditional k-means and k-harmonic methods.


1994 ◽  
Vol 22 (3) ◽  
pp. 126-127
Author(s):  
Johnpeter Horst Grill
Keyword(s):  

Author(s):  
James Tyacke ◽  
Richard Jefferson-Loveday ◽  
Paul Tucker

Nine Large Eddy Simulation (LES) methods are used to simulate flow through two labyrinth seal geometries and are compared with a wide range of Reynolds-Averaged Navier-Stokes (RANS) solutions. These involve one-equation, two-equation and Reynolds Stress RANS models. Also applied are linear and nonlinear pure LES models, hybrid RANS-Numerical-LES (RANS-NLES) and Numerical-LES (NLES). RANS is found to have a maximum error and a scatter of 20%. A similar level of scatter is also found among the same turbulence model implemented in different codes. In a design context, this makes RANS unusable as a final solution. Results show that LES and RANS-NLES is capable of accurately predicting flow behaviour of two seals with a scatter of less than 5%. The complex flow physics gives rise to both laminar and turbulent zones making most LES models inappropriate. Nonetheless, this is found to have minimal tangible results impact. In accord with experimental observations, the ability of LES to find multiple solutions due to solution non-uniqueness is also observed.


Sign in / Sign up

Export Citation Format

Share Document