he mid-frontobasal approach can be carried out with the help of several tools, thanks to the technical improvements in the neurosurgical field. Cutting thick bone is one of the drawbacks of the power saw, this needs rongeuring of the bone or the use of manual spiral wire with handle.1 The use of the Gigli saw2 requires additional time compared with power-driven drills, however, this is amply co...

Given a simple (cuttable) polygon Q drawn on a piece of planar material R, we cut Q out of R by a (small) circular saw with a total number of cuts no more than twice the optimal. This improves the previous approximation ratio of 2.5 obtained by Demaine et al. in 2001.

The purpose of this study was to compare the knee joint dynamics for males and females performing constrained cutting tasks to an unanticipated running and cutting maneuver. Sixteen male and 17 female recreational athletes were recruited to perform four cutting tasks; unanticipated run and cut (CUT), stride land and cut (SLC), far box-land and cut (FLC), and close box-land and cut (CLC). Three-...

Most cut-to-length (CTL) harvesters provide sensors for measuring dtameter of trees as they are cut and processed. Among other uses, this capability provides a data collection tool for marketing of logs in real time. Logs can be sorted and stacked based on up-to-date market information, then transportation systems optimized to route wood to proper destinations at lowest cost. This capability do...

One of the most significant and effective criteria in the process of cutting dimensional rocks using the gang saw is the maximum energy consumption rate of the machine, and its accurate prediction and estimation can help designers and owners of this industry to achieve an optimal and economic process. In the present research work, it is attempted to study and provide models for predicting the m...

In the last lecture, we introduced the classic problem of maximum cut, where the objective is to find a cut of the given graph with maximum weight. We also saw some techniques give 1/2-approximation, such as random assignment and local search. In this lecture we will introduce the semidefinite-programming (SDP) relaxation for this problem. This approach, proposed by Goemans &Williamson in 90’s,...

It is widely acknowledged that induced earthquakes may be linked to the fluid mass injection into subsurface in a manner of reactivating preexisting natural faults. To better understand potential effect tectonic boundary conditions on fault slip behavior, we performed injection-induced shear experiments critically stressed saw-cut sandstone samples under constant piston displacement (CPD test) ...

Two Surface acoustic wave (SAW) resonators were fabricated on langasite substrates with Euler angle of (0°, 138.5°, 117°) and (0°, 138.5°, 27°). A dipole antenna was bonded to the prepared SAW resonator to form a wireless sensor. The characteristics of the SAW sensors were measured by wireless frequency domain interrogation methods from 20 °C to 600 °C. Different temperature behaviors of the se...

The demand for liquefied-natural-gas-fueled tanks on ships is growing in accordance with IMO 2020 regulations. use of high manganese steel has increased recently, as this material can be applied at cryogenic service temperatures according to IGF code and economic advantages over other materials. In study, the heat input welding process, which involves one-side submerged arc (SAW) cut wire, inve...