enhanced machining of steel using femtosecond pulse pairs

... ablation of steel using femtosecond double -pulse trains. Double -pulse trains with pulse- to -pulse separations between 1 ps and 1 ns were used to machine micro-channels in a steel sample. The depths of ... investigate the use of femtosecond double -pulse trains to optimize the ma- chining of metal (steel) . Femtosecond double -pulse trains at several fluences were g...

Ngày tải lên: 06/05/2014, 08:53

... levels of alkaline and thermotolerant pectinase by solid state fermentation. Production of this enzyme was affected by nature of solid substrate, level of moisture content, presence or absence of ... by using a variety of solid substrates (wheat bran, rice bran, apple pomace). The original moisture content of the apple pomace was 80%. Effect of moisture contents on pectinase p...

Ngày tải lên: 01/04/2014, 00:21

... of the organic matrix of bone consists of collagen I, where it provides both the framework for mineralization and the tensile strength that gives bone elasticity. Collagen I is comprised of ... instructions (Applied Biosystems). Assessment of relative allele abundance of COL1A2 mRNA The software PeakPicker (17) was used to quan- tify ratios of the two COL1A2 alleles for al...

Ngày tải lên: 03/11/2012, 11:52

... walls of office buildings and the floors of residential units for temperature control, while only distributing the volume of air required for ventilation. This decoupled system allows for 100% of ... (0.3048 m) off of the rear wall as shown in Figure 4, which gives an area of 2.25 ft2 (0.2090 m2) for each vent. Case 1 has a volume of 1,368 ft 3 (38.74 m 3 ). By meeting the...

Ngày tải lên: 05/09/2013, 15:28

... sides of the single cell and collected in vessels atop of the electrolyser. 2.5 Performance of the membrane electrode assembly (MEA) The performance of prepared MEA is evaluated using in-house ... are collected in respective vessels. The yield of hydrogen is calculated by taking the volume of the vessel and length of the vessel and length of the hydrogen gas occupied i...

Ngày tải lên: 05/09/2013, 16:11

... dependence of cutting forces in HT of 16MnCr5 (AISI 5115) steel of 60–62 HRC hardness with CBN tools at cutting speed of 145 m/min and a p = 0.2 mm [4] and (b) the influence of steel hardness ... transition of HM technology is putting together the right combination of machine, tooling, programming and suppliers. Today, the machining of hard steels is often combin...

Ngày tải lên: 18/10/2013, 03:15

... necessarily mean the end of the service life of the structure. An integrated approach using scheduled inspections on the flawed members and analysis of fracture/fatigue resistance of the same members ... discontinuity can be seen as a shadow of different photographic density from that of the image of the surrounding material. Evaluation of the radiograph is based on a comp...

Ngày tải lên: 19/01/2014, 23:20

... function of hydraulic steel structures is to dam and control the release of water. Sources of repeated loading include changes in load due to pool fluctuations, operation of the hydraulic steel ... especially true of welds on riveted structures, since the structural steels typically used in older structures are not characterized as steels for welding. A discussion of struc...

Ngày tải lên: 19/01/2014, 23:20

... G198P and G198P) were constructed using the standard mutation protocol of the discovery studio Fig. 1. Ribbon plot of the three-dimensional structure of Ochr- MPH, using Pseud-MPH (PDB ID: 1P9E) ... 1, whereas the T 50 of G198P was lower than that of the WT enzyme. The T 50 of the double point mutant (G194P ⁄ G198P) was similar to that of the WT enzyme and between those of...

Ngày tải lên: 15/02/2014, 01:20

... direction of research appeared in the last decade, taking full advantage of the ”wisdom of crowds” (Surowiecki, 2004). In simple words, wis- dom of crowds enables parallel acquisition of opin- ions ... opinions of multiple an- notators/experts, which is referred to as ”wis- dom of crowds”. In this paper, we propose a new approach for modeling wisdom of crowds based on the Late...

Ngày tải lên: 20/02/2014, 05:20