Cleaning Device for Greenhouses Soft Roofs

2004 ◽  
Author(s):  
Gedalyahu Manor ◽  
Amos Geva ◽  
David Jacobs ◽  
Semion Tabak ◽  
Livio Singer ◽  
...  
Keyword(s):  
2017 ◽  
Vol 07 ◽  
pp. 19
Author(s):  
Duy, N.H.A. ◽  
Ngon, N.C. ◽  
Khanh, N.V.

2021 ◽  
Vol 209 ◽  
pp. 300-314
Author(s):  
Lijun Wang ◽  
Jin Chai ◽  
Housheng Wang ◽  
Yingshuai Wang

2018 ◽  
pp. 65-65
Author(s):  
Khuram Amber ◽  
Imdad Hussain ◽  
Anila Kousar ◽  
Muhammad Bashir ◽  
Mohammad Aslam ◽  
...  

1999 ◽  
Vol 130 (1) ◽  
pp. 104-108 ◽  
Author(s):  
ROGER L. ISAACS ◽  
BRADLEY B. BEISWANGER ◽  
JODIE L. CRAWFORD ◽  
MELISSA S. MAU ◽  
HOWARD PROSKIN ◽  
...  

Endoscopy ◽  
2018 ◽  
Vol 51 (01) ◽  
pp. 85-92 ◽  
Author(s):  
Kelly van Keulen ◽  
Helmut Neumann ◽  
Jörn Schattenberg ◽  
Aura van Esch ◽  
Wietske Kievit ◽  
...  

Abstract Background The importance of high quality preprocedural bowel preparation is widely acknowledged, but suboptimal bowel cleansing still occurs in up to 20 % of all colonoscopy patients. The aim of this study was to evaluate the performance of a novel intraprocedural cleaning device for cleaning poorly prepared colons. Methods This multicenter feasibility study included patients aged 18 – 75 years who were referred for colonoscopy. Intraprocedural cleaning was performed in patients after a limited preprocedural bowel preparation regimen (2 days of dietary restrictions and 2 × 10 mg bisacodyl). The primary outcome was the proportion of adequately prepared patients (Boston Bowel Preparation scale [BBPS] ≥ 2 in each segment) before and after segmental washing with the new device. Secondary outcomes included: cecal intubation rate, procedure time, system usability, patient satisfaction, and safety. Results 47 patients (42.6 % male), with a median age of 61 years (interquartile range [IQR] 46 – 67 years), were included at three clinical sites. Cecal intubation was achieved in 46/47 patients (97.9 %). The cleaning device significantly improved the proportion of patients with adequate bowel cleansing (from 19.1 % to 97.9 %; P < 0.001) and median BBPS score (from 3.0 [IQR 0.0 – 5.0] to 9.0 [IQR 8.0 – 9.0]). Median cecal intubation time and total procedure time were 16.5 minutes (IQR 9.0−28.3) and 34.0 minutes (IQR 25.0 – 42.8), respectively. Physicians were satisfied with the ease of use of the device and it was well tolerated by patients. No severe adverse events occurred during the study period. Conclusions This feasibility study suggests that the intraprocedural cleaning device appears to be safe and effective in cleaning poorly prepared colons to an adequate level, allowing a thorough colorectal examination.


Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 336 ◽  
Author(s):  
Jingyu Qu ◽  
Tie Yan ◽  
Xiaofeng Sun ◽  
Zijian Li ◽  
Wei Li

The hole cleaning device is a powerful application which can effectively slow down the deposition of cuttings during drilling. However, in this complicated swirl flow created by the device, the decay of the swirl flow and the particle behavior are not evident yet. In this paper, the decay of the swirl flow and the particle behavior in the swirl flow field are studied by the Eulerian–Eulerian two-fluid model (TFM) coupled with the kinetic theory of granular flows (KTGF), and sliding mesh (SM) technique for simulating the fluid flow. The results show that the swirl intensity decays exponentially along the flow direction under laminar flow conditions. The swirl flow has a longer acting distance at a higher rotational speed, which can effectively slow down the deposition of cutting particles. The initial swirl intensity of swirl flow induced by the blades increases significantly with the increase of blade height and the decrease of the blade angle. The tangential velocity of the cutting particles in the annulus is more significant near the central region, gradually decreases toward the wall in the radial direction, and rapidly decreases to 0 at the wall surface. The decay rate is negatively correlated with the initial swirl intensity. The results presented here may provide a useful reference for the design of the hole cleaning device.


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