We consider a typical problem in the assembly of printed circuit boards (PCBs) in a two-machine flow shop system to simultaneously minimize the weighted sum of weighted tardiness and weighted flow time. The investigated problem is a group scheduling problem in which PCBs are assembled in groups and the interest is to find the best sequence of groups as well as the boards within each group to mi...

Solar activity plays a quintessential role in influencing the interplanetary medium and space-weather around Earth. Remote sensing instruments onboard heliophysics space missions provide pool of information about Sun's via measurement its magnetic field emission light from multi-layered, multi-thermal, dynamic solar atmosphere. Extreme UV (EUV) wavelength observations help understanding subtlet...

Most Gram-negative bacteria contain lipopolysaccharide (LPS), a glucosamine-based phospholipid, in the outer leaflet of the outer membrane (OM). LPS is unique to the bacterial OM and, in most cases, essential for cell viability. Transport of LPS from its site of synthesis to the cell surface requires eight essential proteins, MsbA and LptABCDEFG. Although the key players have been identified, t...

The ribosome is a complex macromolecular machine and serves as an ideal system for understanding biological macromolecular assembly. Direct observation of ribosome assembly in vivo is difficult, as few intermediates have been isolated and thoroughly characterized. Herein, we deploy a genetic system to starve cells of an essential ribosomal protein, which results in the accumulation of assembly ...

Translation of assembly code to high-level language code is of importance in the maintenance of legacy code, as well as in the areas of program understanding, port-ing, and recovery of code. We present techniques used in the asm2c translator, a SPARC assembly to C translator. The techniques involve data and control ow analyses. The data ow analysis eliminates machine dependencies from the assem...

This paper aims to demonstrate the application of multi-objective evolutionary optimization, namely an adaptation of NSGA-II, to simultaneously optimize the assembly sequence plan as well as selection of the type and number of assembly stations for a production shop that produces three different models of wind propelled ventilators. The decision variables, which are the assembly sequences of ea...

This work presents a vision-based quality assurance system that does assembly line monitoring. The is developed using machine learning hand tracking and object detection methods to monitor the worker’s movement while evaluating correctness of assembly. Feedback about order steps worker has taken continuously shown user. potential reduce amount manual required for in line.

A new approach is proposed to translate existing software programs from one instruction set other instruction sets at the assembly level. The behaviors of instructions are abstractly represented as manipulation of the machine state. The behavior of each basic block of the software program is then represented as state transition pair. Instruction set retargeting is then modeled as the problem of...

Parrot is a virtual machine designed to be a target for languages that have traditionally been run using an interpreter. The virtual machine and its assembly language include many high-level features such as objects, thread synchronization support, and garbage collection. It is set apart from other virtual machines by its register-machine structure, while many other contemporary VMs use a stack...