scholarly journals Experimental Investigation of Fatigue Quality of Structure Under Tensile Load with Unloaded Fasteners Which Rivet Bucktail Overrides Bend Radius (Parallel to Load) in Civil Aircraft

2021 ◽  
Vol 687 (1) ◽  
pp. 012091
Author(s):  
Huang Zhirong ◽  
Tu jiayi ◽  
Chen Zixiong ◽  
Diao Chuntao ◽  
Wen Jie
Keyword(s):  
Experimental Investigation ◽  
Tensile Load ◽  
Bend Radius ◽  
Civil Aircraft ◽  
Quality Of Structure

scholarly journals Validation of the Chinese version of the Care Evaluation Scale for measuring the quality of structure and process of end-of-life care from the perspective of bereaved family

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Juanjuan Zhao ◽  
Liming You ◽  
Hongmei Tao ◽  
Frances Kam Yuet Wong
Keyword(s):  
End Of Life ◽  
End Of Life Care ◽  
Mainland China ◽  
Chinese Version ◽  
Life Care ◽  
Quality Of Dying ◽  
Bereaved Family ◽  
Quality Of Structure ◽  
Care Evaluation

Abstract Background Assessing the quality of structure and process of end-of-life care can help improve outcomes. There was currently no valid tool for this purpose in Mainland China. The aim of this study is to validate the Chinese version of the Care Evaluation Scale (CES). Methods From January to December 2017, a cross-sectional online survey was conducted among bereaved family members of cancer patients from 10 medical institutes. The reliability of the CES was assessed with Cronbach’s α, and structural validity was evaluated by confirmatory factor analysis. Concurrent validity was tested by examining the correlation between the CES total score and overall satisfaction with end-of-life care, quality of dying and death, and quality of life. Results A total of 305 valid responses were analyzed. The average CES score was 70.7 ± 16.4, and the Cronbach’s α of the CES was 0.967 (range: 0.802–0.927 for the 10 domains). The fit indices for the 10-factor model of CES were good(root-mean-square error of approximation, 0.047; comparative fit index, 0.952; Tucker–Lewis index, 0.946; standardized root mean square residual, 0.053). The CES total score was highly correlated with overall satisfaction with medical care (r = 0.775, P < 0.01), and moderately correlated with patients’ quality of life (r = 0.579, P < 0.01) and quality of dying and death (r = 0.570, P < 0.01). In addition, few associations between CES total score and demographic characteristics, except for the family members’ age. Conclusions The Chinese version of the CES is a reliable and valid tool to evaluate the quality of structure and process of end-of-life care for patients with cancer from the perspective of bereaved family in Mainland China.

INFLUENCE OF RECTANGULAR STEEL SPLICE-SLEEVE FOR PRECAST CONCRETE CONNECTION

2015 ◽  
Vol 77 (12) ◽  
Author(s):  
Ahmad Baharuddin Abd Rahman ◽  
Tan Kee Hong ◽  
Izni Syahrizal Ibrahim ◽  
Roslli Noor Mohamed
Keyword(s):  
Structural Integrity ◽  
Precast Concrete ◽  
Tensile Load ◽  
Steel Plates ◽  
Steel Bar ◽  
Tensile Performance ◽  
Bond Property ◽  
The Many ◽  
Steel Sleeve

Precast concrete building system has gained its popularity in Malaysia because of the many advantages such as high quality of structural components, less labour intensive at the construction site, and shorter completion time of a project. One of the constraints in precast concrete structures is to ensure that the connections are strong enough to ensure the structural integrity and robustness of the overall frames. In this study, a total of nine rectangular steel splice-sleeve connections were tested experimentally under incremental tensile loads. Two steel plates were inserted and welded to each end of the steel splice-sleeve. The steel plates act as shear key to provide the interlocking mechanism to the grout and to enhance the bond property between the grout and the splice. These plates were adopted to prevent the grout slippage from the sleeve. The grout strength, embedded steel bar lengths and the size of the steel sleeve splice were varied among the specimens to study their effect on the tensile performance of the connection. The results showed that the higher strength of grout, longer embedded length of steel bar and smaller size of the sleeve contributes to a higher ultimate tensile load.

scholarly journals An Experimental Investigation of the External Wind Effects on the Ceiling Temperature Distribution of Fire-Induced Thermal Flow in a Corridor Connected to a Compartment

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1826
Author(s):  
Bei Cao ◽  
Xiaodong Zhou ◽  
Yubiao Huang ◽  
Yuan Zheng ◽  
Kai Ye ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Temperature Distribution ◽  
Wind Velocity ◽  
Shielding Effect ◽  
Temperature Profiles ◽  
Building Structures ◽  
Thermal Flow ◽  
Ceiling Temperature ◽  
Higher Temperature

Fire-induced thermal flow is the greatest threat to trapped people and the heat-resistant quality of building structures. This paper presents an experimental investigation of the effects of external wind on the ceiling temperature distribution of fire-induced thermal flow in a one-sixth scale corridor connected to a compartment. In the experiments, the fire source was placed in the compartment with hot thermal flow spilled into the connected corridor. The heat release rate (HRR) was changed from 10 to 20 kW and the external wind velocity was changed from 0 to 2.09 m/s. The ends of the corridor could be adjusted to be fully or partially open to the environment with dam-boards arranged at the ends of the corridor. An effective corridor HRR, Qcorridor, was defined to account for the amount of the spilled plume into the corridor. Results show that the temperature under the ceiling changed in a non-monotonic way with wind velocity: it first increased and then decreased with wind velocity. It was revealed that the dam-boards at the corridor opening had an evidently shielding effect, leading to higher temperature compared to the fully open environment. Finally, uniform correlations are proposed for predicting the attenuation law of ceiling temperature profiles in corridors for different wind conditions.

The Experimental Investigation of Scroll Expanders Operating in the ORC System with HFE7100 as a Working Medium

2016 ◽  
Vol 831 ◽  
pp. 245-255 ◽  
Author(s):  
Tomasz Z. Kaczmarczyk ◽  
Eugeniusz Ihnatowicz
Keyword(s):  
Experimental Investigation ◽  
Magnetic Coupling ◽  
Gear Pump ◽  
Working Medium ◽  
Maximum Current ◽  
Glycol Solution ◽  
Thermal Oil ◽  
Scroll Expanders ◽  
Regenerative Cycle

The paper presents the results of experimental investigation on the ORC system with a droplet separator (which was used to improve the quality of working medium vapour) and two scroll expanders, which operated individually. The research aimed at verifying the correctness of scroll expanders performance in the ORC installation, equipped with the electric flow heater for thermal oil as a heat source. The paper contains the characteristics of the heat exchangers installation that were obtained for the ORC system variant using a regenerative cycle. The tests were conducted for selected flow rates and various temperatures of the working medium HFE7100, glycol solution and thermal oil. The unit with a gear pump and a magnetic coupling functioned as a circulating pump. Following the results of tests carried out on two scroll expanders it may be concluded that the electric power output that was measured at the generator terminals was approximately 750 W. The maximum voltages generated by the expanders amounted to around 200 V and the maximum current was about 4 A.

Experimental investigation of the quality of transmission in transparent mesh networks with mixed fiber types

2010 ◽  
Author(s):  
Pascal Henri ◽  
Christian Simonneau ◽  
Florence Leplingard ◽  
Jean-Christophe Antona ◽  
Laurence Lorcy
Keyword(s):  
Experimental Investigation ◽  
Mesh Networks ◽  
Fiber Types ◽  
Quality Of Transmission

MPF, a multipurpose figure of merit for phasing procedures

2017 ◽  
Vol 73 (1) ◽  
pp. 69-76 ◽  
Author(s):  
Maria Cristina Burla ◽  
Benedetta Carrozzini ◽  
Giovanni Luca Cascarano ◽  
Carmelo Giacovazzo ◽  
Giampiero Polidori
Keyword(s):  
Ab Initio ◽  
Figure Of Merit ◽  
Computing Time ◽  
Correct Solution ◽  
Unknown Structure ◽  
Quality Of Structure

The efficient multipurpose figure of merit MPF has been defined and characterized. It may be very helpful in phasing procedures. Indeed, it might be used for establishing the centric or acentric nature of an unknown structure, for identifying the presence of some pseudotranslational symmetry, for recognizing the correct solution in multisolution approaches and for estimating the quality of structure models as they become available during the phasing process. Thus, phase improvement or deterioration may be monitored and useless models may be discarded to save computing time. It is also shown that MPF may be applied in different phasing approaches, no matter ifab initioor nonab initio.

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