Magnetic Birefrigence in Liquid Mixture

In this paper magnetic birefringence in the liquid mixture has been studied@IAC

A New Type of Magnetic Birefringence

@IAC

Magnetic Birefringence in Solutions of Sodium Chlorate and Sodium Bromate

This paper deals with the Magnetic Birefringence in Solutions of Sodium Chlorate and Sodium Bromate@IAC

The Effect of Wrist Position on Finger Tendon Loads Following Pulley Sectioning and Operative Reconstruction

© 2019 The Authors Purpose: Postoperative rehabilitation is important for maximizing patient outcomes after surgical pulley reconstruction. The purpose of this study was to identify the optimal wrist position in which rehabilitation should be undertaken to decrease the load on surgically reconstructed pulleys. Methods: We tested 14 digits composed of the index, middle, and ring fingers from 5 cadaveric specimens in a novel in vitro finger motion simulator designed to achieve full finger flexion and extension actively. Servo-motors were used to generate motion through tendons under load or position control while measuring tendon forces, joint range of motion, and tendon excursion. Flexor digitorum profundus (FDP) and flexor digitorum superficialis loads were measured sequentially with native intact pulleys and A2 and A4 pulleys sectioned, and with reconstructed A2 and A4 pulleys. Each condition was tested with the wrist neutral and with 30° wrist flexion or extension. The effect of wrist position on FDP and flexor digitorum superficialis loads under each condition was analyzed using repeated-measures analysis of variance. Results: With pulleys reconstructed, the wrist position had a significant effect on tendon load. The flexed wrist position resulted in a 31% reduction of FDP load compared with the neutral wrist position. Wrist extension also produced an apparent reduction of 14%, although not statistically significant. Conclusions: After pulley repair, placing the wrist in 30° flexion decreased tension in the FDP tendon compared with a neutral wrist. Clinical relevance: This study suggests that rehabilitation should be carried out with the wrist flexed to reduce the load on pulley reconstructions

Automatic differentiation for gradient-based optimization of radiatively heated microelectronics manufacturing equipment

Automatic differentiation is applied to the optimal design of microelectronic manufacturing equipment. The performance of nonlinear, least-squares optimization methods is compared between numerical and analytical gradient approaches. The optimization calculations are performed by running large finite-element codes in an object-oriented optimization environment. The Adifor automatic differentiation tool is used to generate analytic derivatives for the finite-element codes. The performance results support previous observations that automatic differentiation becomes beneficial as the number of optimization parameters increases. The increase in speed, relative to numerical differences, has a limited value and results are reported for two different analysis codes

Traces of Fallback Breccia on the Rim of Barringer Meteorite Crater (a.k.a. Meteor Crater), Arizona

Barringer Meteorite Crater (a.k.a. Meteor Crater), Arizona, is one of the youngest and best preserved impact craters on Earth. For that rea-son, it provides a baseline for similar craters formed in the geologic past, formed elsewhere in the Solar Sys-tem, and illuminates the astronomical and geological processes that produce them. The crater has not, how-ever, escaped erosion completely. While Shoemaker [1] mapped a breccia with fallback components inside the crater, he did not locate it beyond the crater rim. He only found remnants of that type of debris in re-worked alluvium [1; see also 2]. Fallback breccia and any base-surge deposits have, thus, been missing components in studies of material ejected beyond the transient crater rim

A Planning Model for Bioterrorism Response Logisitics

A Planning Model for Bioterrorism Response Logisitic

The Artistic Exploration of Wood Joinery

This abstract presents an innovative and interactive wooden box designed to provide an engaging educational experience focused on wood joinery techniques. The box incorporates a comprehensive collection of various wood joints, allowing users to explore and learn about different joinery methods commonly used in woodworking. The interactive wooden box serves as a tangible educational tool, enabling students, enthusiasts, and professionals to gain hands-on experience and deepen their understanding of wood joinery. The box features a wide range of joints, including but not limited to dovetail, mortise and tenon, box joint, rabbet, tongue and groove, and many others. Each joint is meticulously crafted and labeled for easy identification and reference. Users can manipulate the joints within the box, experiment with different combinations, and observe firsthand how the joints interlock and create sturdy connections. The tactile nature of the box encourages a multi-sensory learning experience, fostering a deeper appreciation for the craftsmanship and design principles involved in woodworking

The Application of Automatic Differentiation to Problems in Engineering Analysis

Automatic differentiation is a technique of computing the derivative of a function or a subroutine written in a higher level language such as FORTRAN or C. Significant progress has been made in this field in the last few years. Here, we give a short exposition to automatic differentiation and demonstrate its applicability to several fields of engineering analysis. 1 Introduction Engineering analysis often requires the calculation of gradients of functions written in the form of a program or a subroutine in a higher level language such as FORTRAN or C. Often, such functions are not available in an explicit form. A common practice is to approximate the gradients by finite differences. However, finite difference gradients are known to be expensive and inaccurate in several circumstances. Symbolic differentiation can be used if the function being computed is available in the form of a set of expressions. Analytical methods of differentiation have been developed in several areas, but they ..