Experimental Study and CFD Analysis of the Volumatic® Spacer

Author(s):  
Sofia Abreu ◽  
Lui´s Silva ◽  
Senhorinha F. C. F. Teixeira ◽  
Henedina Antunes ◽  
Helena Marques ◽  
...  

The aim of the present study was to evaluate the performance of Ventilan® coupled to the Volumatic® spacer. An experimental study was conducted using the four stage Multistage Liquid Impinger (MSLI). This enabled the observation that half of the pharmacological dose is retained within the body of the spacer. Therefore, the air flow inside the spacer was studied, along the respiratory cycle, using Fluent™. Several recirculation regions were observed inside the spacer that may influence the aerosol flow and also the deposition of the drug.

Author(s):  
Tetsuhiro Tsukiji ◽  
Shinsuke Katsumata

There are many devices that use air flow characteristics. Recently an electric fan without propeller using air jet flow and a vacuum cleaner using swirling air flow have been developed by Dyson Ltd. Furthermore, as one of the applications of such air flow, a non-contact holder that can hold a body such as a work piece, disc etc., using low-pressure region generated by air flow without contact was developed by a Japanese company. Some bodies such as work piece are brought without contact with the holder. The mechanism to hold them is explained by Bernoulli’s theorem. However, systematic research has not been done in the present stage and the effect of the geometry of the non-contact holder on the holding force is not clear. In this paper, we calculated the flow in a non-contact holder and obtained the force to hold a body by CFD analysis. The effect of the deflector and inside geometry of the holder on the velocity and pressure distribution, and holding force is investigated. The deflector is a device fixed with the holder to increase the holding force using low-pressure region. CFD was done using both incompressible and compressible flow, and k-ε turbulent model was used. The calculated pressure distributions of a simpler model of the holder are compared with the previous experimental results to confirm our calculation method. The design policy of a non-contact holder is discussed based on the calculated results of velocity and pressure distributions and holding force. Consequently we show that the deflector is very useful to obtain high holding force and the concept to design the non-contact holder is required to get the holding force according to the weight of the body and to achieve high efficiency.


2021 ◽  
pp. 1354067X2110040
Author(s):  
Josefine Dilling ◽  
Anders Petersen

In this article, we argue that certain behaviour connected to the attempt to attain contemporary female body ideals in Denmark can be understood as an act of achievement and, thus, as an embodiment of the culture of achievement, as it is characterised in Præstationssamfundet, written by the Danish sociologist Anders Petersen (2016) Hans Reitzels Forlag . Arguing from cultural psychological and sociological standpoints, this article examines how the human body functions as a mediational tool in different ways from which the individual communicates both moral and aesthetic sociocultural ideals and values. Complex processes of embodiment, we argue, can be described with different levels of internalisation, externalisation and materialisation, where the body functions as a central mediator. Analysing the findings from a qualitative experimental study on contemporary body ideals carried out by the Danish psychologists Josefine Dilling and Maja Trillingsgaard, this article seeks to anchor such theoretical claims in central empirical findings. The main conclusions from the study are used to structure the article and build arguments on how expectations and ideals expressed in an achievement society become embodied.


Author(s):  
E.M. Starinskaya ◽  
N.B. Miskiv ◽  
A.D. Nazarov ◽  
V.V. Terekhov ◽  
V.I. Terekhov ◽  
...  
Keyword(s):  

Author(s):  
YOHAN KURNIAWAN ◽  
ALEXANDER STRAK ◽  
BURHAN BIN CHE DAUD ◽  
HISHAMUDDIN MD. SOM ◽  
ABDUL AZIZ BIN SUAIB

Kewujudan jin merupakan suatu kepercayaan yang telah lama wujud dalam kalangan masyarakat Melayu di Nusantara, khususnya di Malaysia. Kewujudan jin telah diterangkan secara jelas dalam kitab suci Al-Quran. Walaupun terdapat sumber maklumat yang sahih akan tetapi kewujudan jin ini belum dapat dibuktikan secara saintifi k. Kajian yang dijalankan ini bertujuan untuk mengenal pasti dan memahami fenomena kewujudan jin berdasarkan warna aura. Kajian yang dijalankan merupakan kajian eksperimental dan melibatkan seorang responden yang memiliki saka. Kaedah pengumpulan data yang digunakan dalam kajian ini adalah perubahan warna aura dan temu bual. Peralatan kajian yang digunakan adalahperalatan WinAura untuk mendapatkan data perubahan warna aura, dan peralatan rakaman untuk data temu bual. Hasil kajian mendapati kewujudan jin dalam badan seseorang ditandai dengan warna merah yang wujud secara tiba-tiba dan konsisten pada bahagian badan tertentu terutamanya pada bahagian dahi, tekak atau pada bahagian badan sebelah kiri. Hasil temu bual mendapati rawatan perubatan Islam yang dilakukan oleh responden mengatakan bahawa terdapat jin dalam diri responden. Kajian ini berjaya membuktikan kewujudan jin dalam diri responden berdasarkan perubahan warna aura.   The existence of the jinn is a phenomena that has long existed among the Malay community in Nusantara, especially in Malaysia. The existence of the jinn has been described clearly in the Holy Quran. Although there is a valid source of information, unfortunately the existence of the genie has not been scientifically proven. The study was aimed to identify and understand the phenomenon of jinn existence based on aura color. The study was an experimental study and involved a respondent who has saka. Data collection methods were used in this study was aura change color and interview. The equipments was used in this research were the WinAura machine to obtain of changing color data of the aura. The study found that the existence of genie in a person’s body was characterized by suddenly and consistent appear of red color in certain parts of the body, especially on the forehead, throat or on the left side of the body. The interviews also found that the characteristics and experience that the respondent’s surrounding and the there are energy or strength that followed respondent. This study proved the existence of supernatural beings (genie) based on aura change color.


1963 ◽  
Vol 53 (5) ◽  
pp. 955-963
Author(s):  
Henry N. Pollack

Abstract The motion near a seismic source is synthesized from experimentally obtained seismograms of non-dispersed body waves. The body waves were emitted from an explosive source submerged in a lake with a frozen surface. The seismograms were recorded at several distances by moving the source to a greater depth for each record, while the seismometer remained in a fixed position on the surface ice sheet. All syntheses of the waveform one meter from the source yield the impulsive nature of the source. Deviations between the synthesized one-meter record and the observed one-meter motion are thought to reflect primarily the changing character of the shot medium with depth from the ice. These results indicate that over the short propagation distances (about three wavelengths for the higher frequencies recorded) through the simple medium of this experiment, the observed waveforms and their associated spectra retain characteristics of the source function. The records also yield some information regarding the nature and structure of the elastic medium about the source.


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