This paper argues the widespread adoption of Just-in-Time (JIT) logistics provides a key to understanding the growth in the U.S. trade share. To do so, I develop a dynamic trade model based on the choice of the logistics technology used in a firm’s supply chain. The model’s predicted trade dynamics depend on how the set of firms using JIT with international suppliers changes over time. A numeri...

Many studies have shown that the careful planning of construction logistics can result in significant saving. However, despite attempts to improve the logistics of construction materials, the purchase, delivery, storage and movement of materials are still conducted in a rather unstructured manner. In this paper, construction logistics are modeled and analyzed using Petri Net (PN) techniques. Th...

We introduce straf, a Scala framework for recording and optimizing execution traces of an interpreter it is composed with. For interpreters that satisfy the requirements detailed in this paper, this composition requires but a small effort from the implementer to result in a trace-based JIT compiler. We describe the framework, and illustrate its composition with a Scheme interpreter that satisfi...

For virtual machine implementations to achieve high performance, some form of translation of the virtual machine's input language into the native code of the host machine seems necessary. This translation process is often called justin-time (a.k.a. JIT) compilation, or sometimes dynamic compilation. The use of JIT compilation introduces a tension in virtual machine design: compilation time adds...

In widely-used actor-based programming languages, such as Erlang, sequential execution performance is as important as scalability of concurrency. In order to improve sequential performance of Erlang, we develop Pyrlang, an Erlang virtual machine with a just-in-time (JIT) compiler by applying an existing meta-tracing JIT compiler. In this paper, we overview our implementation and present the opt...

Optical burst switch (OBS) is considered to be a promising switch technology for the future network. In this paper, just-in-time (JIT), just-enough-time (JET) and horizon signalling schemes for OBS are presented. These signalling schemes run over a core dynamic wavelength division multiplexing (DWDM) network. The network is proposed to support IP, ATM and burst traffic. We apply the Poisson and...

Most modern languages are implemented using Virtual Machines (VMs). While the best VMs use Just-In-Time (JIT) compilers to achieve good performance, JITs are costly to implement, and few VMs therefore come with one. The RPython language allows tracing JIT VMs to be automatically created from an interpreter, changing the economics of VM implementation. In this paper, we explain, through two conc...

In this paper we consider production economic and cost related yield rate in a JIT (Just in Time) system. Based on the traditional EPQ (Economic Production Quantity) model, we establish the relation between cost and yield rate. The geometric programming approach is applied in our model to solve this optimizing posynomials problem. A numerical example is carried out to verify the proposed model....