In this paper, we develop a Mixed Integer Linear model for a practical multi-facility wood procurement-planning problem using a cut-to-length (CTL) bucking system. This forest management problem is difficult to solve since it integrates the forest bucking problem and the multi-facility supply planning problem. A priority list approach was used to generate adequate bucking patterns for the Easte...

An optimal tree-stem bucking system was developed for central Appalachian hardwood species using 3D modeling techniques. ActiveX Data Objects were implemented via MS Visual C++/OpenGL to manipulate tree data which were supported by a backend relational data model with five data tables for stems, grades and prices, logs, defects and stem shapes. Network analysis algorithm was employed to achieve...

We consider a two-echelon timber supply chain in which the first echelon consists of several stands to be harvested and the second echelon consists of mills to be procured with logs of different length. This problem aims at minimizing harvesting and transportation costs for one production period, while satisfying demand expressed as mix of volumes of specific log types. Harvesting cost, which i...

background and aim: total hip replacement (thr) is done comprehensively all over the world. despite the effects of braces on control of thr complications , few studies have been performed on this subject. the purpose of this study was to evaluate immediate effect of hip abduction brace on mobility and functional balance of patients with thr.    materials and methods: eight men and nine women wi...

Abstract—Nowadays, energy dissipation devices are commonly used in structures. High rate of energy absorption during earthquakes is the benefit of using such devices, which results in damage reduction of structural elements, specifically columns. The hysteretic damping capacity of energy dissipation devices is the key point that it may adversely make analysis and design process complicated. Thi...