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Online since: January 2022
Authors: Zhi Guo Gao
Babu[1] analyzed microstructure development of Ni-based superalloys turbine manufacture by selective electron beam melting, selective laser melting and direct energy deposition.
(d)Transition boundaries of dendrite growth, (e) solid aluminum concentration and (f) minimum dendrite tip undercooling in the (001)/[110] growth crystallography Figure 1.
After satisfactory application of coupling mathematical model, the results are conclusively obtained in brief as follows. 1.
References [1] S.S.
Materisls Sciences and Engineering A,479(2008),356-364
Online since: January 2012
Authors: Poppy Puspitasari, Noorhana Yahya, Krzysztof Koziol, Giuseppe Pavia
The solution was stirred for 1 day.
Fig. 1: Ammonia Synthesis Reactor.
T = 30oC-190oC, P = 1 atm, H-F = 1 T, Cat. = 0.2 g, GHSV = 12000 cm3/gcat.h, F = 40 cm3/min, H2:N2 = 3:1.
References [1] N.
Wenzhao, Chinese Journal of Catalysis 27 (2006) 479-484.
Online since: November 2011
Authors: Hong Yun Xun, Rong Ge Xiao, Bing Qian Wei, Wen Qiang Meng
A compound cross-sectional channel with a horizontal scale, 1/600 (1/Br), was built as the model flume (Fig.1) according to the plan.
Experimental conditions of the distorted model experiment Items Prototype Distorted model experiment Horizontal scale ――― 1/600 1/600 Vertical scale ――― 1/240 1/353 Degree of distortion ――― 2.5 1.7 Slope 1/138 1/55 1/81 Bed material Small gravels Sand Lapilli Specific gravity of the sediment 1.65 1.65 0.34 Grain diameter 71mm 0.75mm 1.66mm Discharge 700(m3/s) 900(m3/s) 0.426(l/s) 0.548(l/s) 0.146(l/s) 0.210 (l/s) Flood time 45hrs. 17min.38sec. 7min.51sec.
Experimental conditions in the straight flume Items Prototype Distorted model in the straight flume Horizontal scale ――― 1/333 1/333 Vertical scale ――― 1/177 1/263 Degree of distortion ――― 1.88 1.27 Slope 1/138 1/73.4 1/109 Bed material Small gravels Sand Lapilli Specific gravity of the sediment 1.65 1.65 0.34 Grain-size 71mm 0.75mm 1.66mm Discharge 700(m3/s) 900(m3/s) 1.10(l/s) 1.41(l/s) ――― 0.529(l/s) Flood time 45hrs 41min.51sec. 18min.54sec.
References [1] Einstein, H.
Hayakawa (1993.11), A Study on Similarity Law of Distorted River Models with Alternate Bar Beds, Journal of JSCE, No.479/II-25, pp.71-79 (In Japanese)
Online since: September 2011
Authors: Shi Chang Li, Dong Dong Wang, Zhao Yang Zhu, Hong Xia Liu, Min Wang, Shao Bin Gu
The low level (−1) and high level (+1) of each factor were listed in Table 1, a 12-run PB design (Table 2) was used to identify which variables have significant effects on lipid extraction.
According to the resulting effects of these seven variables on mass of lipid and the associated significant levels Table1 Range of different factors investigated with Plackett-Burman design Code Factors Level -1 +1 X1 Treatment time of HCL/min 30 60 X2 Disposing time of boiling water/min 5 8 X3 Vacancy 0 0 X4 Ultrasonic power/w 200 360 X5 Ultrasonic time /min 5 8 X6 Vacancy 0 0 X7 The rate of extracting solution (VCHCl3:VCH3OH) 1:1 2:1 X8 Extracting time /min 10 20 X9 The concentration of NaCl 0.15 % 0.25 % Table2 Plackett-Burman experiment design and response values Runs X1 X2 X3 X4 X5 X6 X7 X8 X9 The yield of lipid production /g/L 1 1 -1 1 -1 -1 -1 1 1 1 2.32 2 1 1 -1 1 -1 -1 -1 1 1 4.08 3 -1 1 1 -1 1 -1 -1 -1 1 1.96 4 1 -1 1 1 -1 1 -1 -1 -1 3.12 5 1 1 -1 1 1 -1 1 -1 -1 1.88 6 1 1 1 -1 1 1 -1 1 -1 2.12 7 -1 1 1 1 -1 1 1 -1 1 2.04 8 -1 -1 1 1 1 -1 1 1 -1 1.32 9 -1 -1 -1 1 1 1 -1 1 1 2.24 10 1 -1 -1 -1 1 1 1 -1 1 1.52 11 -1 1 -1 -1 -1 1 1 1 -1 1.96 12 -1 -1 -1 -1
-1 -1 -1 -1 -1 2.76 p value 0.0365 0.2766 — 0.0634 0.0105 — 0.0104 0.6725 0.2123 — significant * * * Table4 The Box–Behnken design forthe threeindependent variables Runs X1 X2 X3 Response Value/g/L 1 -1 -1 0 2.992 2 -1 1 0 2.652 3 1 -1 0 2.839 4 1 1 0 2.006 5 0 -1 -1 1.632 6 0 -1 1 3.026 7 0 1 -1 1.241 8 0 1 1 2.159 9 -1 0 -1 1.241 10 1 0 -1 1.632 11 -1 0 1 2.941 12 1 0 1 2.346 13 0 0 0 3.213 14 0 0 0 3.179 15 0 0 0 3.247 presented in Table 2, treatment time of HCl (p=0.036), ultrasonic time(p=0.0105) and rate of extracting solution (VCHCl3:VCH3OH) (p=0.0105) in the tested range were identified to have significant effects on lipid extraction.
References [1] D.
Ripmeester, “Comparative study of three laboratory methods for the extraction of bitumen from oil sands,” Fuel, vol. 61, May. 1982, pp. 477-479, doi:10.1016/0016-2361(82)90077-1 [11] R.
Online since: August 2013
Authors: Sumiani Yusoff, T.S. Loh
The nation’s primary energy demand was projected to grow at 3.5% per year from 56Mtoe in 2002 to 147Mtoe in 2030 mainly due to the increase in demand for coal, oil and gas (APEC, 2006).Table 1 shows the electricity generation mix in Malaysia for selected years: Table 1: Electricity Generation Mix in Malaysia (%) (1990-2030) (Source: APERC Analysis, 2005) 1990 2002 2010 2020 2030 Oil 50 9 1 1 0 Gas 20 74 56 48 45 Coal 12 6 36 45 50 Hydro 17 11 7 6 4 Others 0 0 1 1 1 Analysis shows that the heavy dependence on fossil fuels will prolong even till the year 2030, considering no drastic changes occur.
between Annex 1 proponent nations.
Malaysia, in all its potential, utilizes less than 1% of its renewable energy capacity.
References [1] Australian Business Council for Sustainable Energy (2005).
J LCA (OnlineFirst): 1-9
Online since: December 2024
Authors: Nguyen Duc Long, Doan Van Diep, Nguyen Thanh Liem
Table 1.
Formulations of the NBR compounds Ingredients Content (phr) NBR 100 Zinc oxide 5,0 Stearic acid 1,5 Antioxidant TMQ 1,0 Accelerator MBT 1,0 Accelerator TMTD 0,2 Carbon black N330 60 Tricresyl phosphate 15 Sulfur 1,5 APP Change EG Change Methods of characterization The tensile test was used to examine the mechanical properties of the NBR compounds.
This hypothesis is supported by the SEM analysis, as showed in Fig. 1.
From the test results, we can see the EG/APP=2/1, the LOI value reached the best is 27.2 and reached V-1 rating in the UL-94 vertical combustion test.
References [1] R.
Online since: November 2010
Authors: P. Akbarzadeh, Saeid Hadidi-Moud
(1) Where E=206 GPa and v=0.3 were the specific material properties within the range of temperatures.
Under SSY conditions, the crack driving force may be expressed for convenience in terms of a KJ -value, i.e., KJ = 2 1/ vEJ − .
Wallin [1], Jason, Petti and Dodds [4], Kozak et al. [5] and some others assumed the fixed value of four for this exponent.
Taking advantage of symmetry it was sufficient to model one quarter of CT specimen only as shown in Fig.1.
Fig. 1.
Online since: December 2022
Authors: Jay Carlo S. Aguilar, Renee Rose Reginio, Ariane Jan Tongco
As a result, biodiesel, an alternative and renewable fuel, are in high demand [1,2].
WCOs as raw materials have the added benefit of reducing waste management concerns [1].
Table 1.
References [1] M.
Brezny, Effect of Accelerated Aging Rate on the Capture of Fuel-Borne Metal Impurities by Emissions Control Devices, SAE International Journal of Fuels and Lubricants 7 (2) (2014) 471–479
Online since: December 2022
Authors: Khairul Faizal Pa'ee, Nur Suraya Abd Wahab, Nadia Razali, Kelly Tau Len Yong, Emmy Liza Anak Yaji, Norfahana Abd Talib, Mohamad Zulkeflee Sabri
Table 1 Summary of potential ACE inhibitors derived from fish (Collagen Type 1 Alpha 1).
References [1] B.
Res., vol. 61, no. 1, 2017
Int., vol. 2014, pp. 1–9, 2014
Food Sci., vol. 1, no. 1, pp. 28–37, 2015
Online since: March 2021
Authors: Abdulwahab Giwa, Saidat Olanipekun Giwa, Maku Barbanas Haggai
(1) Figure 1.
Table 2: Biodiesel yield at various operating conditions Run Catalyst weight (g) Molar ratio Temperature (ºC) Catalyst type %Yield at 30 min %Yield at 45 min %Yield at 60 min 1 0.2 1:4 60 KC 8 13 18 2 0.4 1:4 60 KC 9 15 19 3 0.6 1:4 60 KC 9 16 22 4 0.2 1:6 60 KC 10 13 18 5 0.4 1:6 60 KC 12.5 14 19 6 0.6 1:6 60 KC 13.5 14 17 7 0.5 1:4 60 ESC 12.5 17 25 8 1.0 1:4 60 ESC 13.5 17 27 9 1.5 1:4 60 ESC 14.5 18 28 10 0.5 1:6 60 ESC 15 19 27 11 1.0 1:6 60 ESC 16 19 28 12 1.5 1:6 60 ESC 16 17 29 From the results obtained and presented in Table 2, increasing the catalyst concentration was observed to increase the oil yield up to a certain value, but further increment beyond this was found not to have much impact on oil yield.
References [1] A.K.
ARPN Journal of Engineering and Applied Sciences, 8(7) (2013) 473-479
ABUAD Journal of Engineering Research and Development, 1(1) (2018) 49-60
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