The traditional method in Iran of cracking walnut manually, using harmer or knife cutter is laborintensive, slow and tedious; besides, most mechanical crackers do not give satisfactory results in terms of kernel extraction quality. A prototype machine was developed to crack walnut. A walnut cracker was designed, constructed and tested to evaluate its performance. The cracker, which consists of ...

Finite element method in pavement analysis is a type of mechanistic analysis that has widely been used by road and transportation engineers these days. This method is used with related programs such as ABAQUS/CAE which is one of the powerful software on this task. Modeling in this software has been developed from 2D static models to 3D dynamic models which are closer to reality due to the more ...

• Autogenous laser welding produces concave end-crater in 17–4 PH that is prone to solidification cracking. Solidification cracking at weld causes leakage. The use of novel zigzag power ramp-down profile significantly shorter, discontinuous, and leakage free cracks. An analysis presents a problems automotive pressure sensor, caused by crater A two-beam (TBLW) was used circumferential weld, whic...

Girth weld cracking is one of the main failure modes in oil and gas pipelines; girth weld cracking inspection has great economic and social significance for the intrinsic safety of pipelines. This paper introduces the typical girth weld defects of oil and gas pipelines and the common nondestructive testing methods, and systematically generalizes the progress in the studies on technical principl...

Database indices provide a non-discriminative navigational infrastructure to localize tuples of interest. Their maintenance cost is taken during database updates. In this work we study the complementary approach, addressing index maintenance as part of query processing using continuous physical reorganization, i.e., cracking the database into manageable pieces. Each query is interpreted not onl...

Rainbow attack is a very efficient attack which uses rainbow tables to offer an almost optimal time-memory tradeoff in the process of recovering the plaintext password from ciphertext hash. In this paper, we proposed a new method which can crack DES password quickly with less power consumption on a coarse grain reconfigurable architecture (CGRA) named reconfigurable encrypt-decrypt system (REED...

Occurrence of top down and bottom up fatigue cracking in asphaltic pavements is common. Conventional pavement analysis methods ignore the existence of cracks in asphaltic layers. However, it seems that the responses of cracked pavement would not be the same as a pavement without crack. This paper describes effects of crack type, position and length, and vehicles tire inflation pressure and axle...

abstract: in this paper, a new population-based search called the bees algorithm (ba) is presented to estimate the time-dependent heat transfer coefficient and the corresponding heat flux at the boundaries of a two-dimensional body subjected to transient heat conduction, using the temperature measurements at discrete nodal locations on the boundaries, where heat flux is specified as the boundar...

The influence coefficient method, which has advantages for conducting inverse analysis and sensitivity studies, is extended to simulate cohesive cracking in three-dimensional bodies when the crack path is known in advance. The method is combined with a focal point model to allow simulation of unload–reload cycles as well. This paper summarizes the theory behind the influence coefficient method ...

Large changes in stiffness associated with cracking and yielding of reinforced concrete sections may be expected to occur during the dynamic response of reinforced concrete frames to earthquake ground shaking. These changes in stiffness in stories that experience cracking might be expected to cause relatively large peak interstory drift ratios. If so, accounting for such changes would add compl...