scholarly journals A practical method for evaluating worker allocations in large-scale dual resource constrained job shops

2014 ◽  
Vol 46 (11) ◽  
pp. 1209-1226 ◽  
Author(s):  
Benjamin J. Lobo ◽  
James R. Wilson ◽  
Kristin A. Thoney ◽  
Thom J. Hodgson ◽  
Russell E. King
Keyword(s):  
Large Scale ◽  
Practical Method ◽  
Job Shops ◽  
Resource Constrained

A Simple Synthesis of the Anticancer Drug Altretamine

2020 ◽  
Vol 17 (8) ◽  
pp. 628-630
Author(s):  
Vu Binh Duong ◽  
Pham Van Hien ◽  
Tran Thai Ngoc ◽  
Phan Dinh Chau ◽  
Tran Khac Vu
Keyword(s):  
Aqueous Solution ◽  
Anticancer Drug ◽  
Potassium Hydroxide ◽  
Large Scale ◽  
Synthesis Method ◽  
Practical Method ◽  
Cyanuric Chloride ◽  
Simple Synthesis ◽  
High Yield ◽  
One Step

A simple and practical method for the synthesis on a large scale of altretamine (1), a wellknown antitumor drug, has been successfully developed. The synthesis method involves the conversion of cyanuric chloride (2) into altretamine (1) by dimethylamination of 2 with an aqueous solution of 40% dimethylamine and potassium hydroxide in 1, -dioxan 4in one step to give altretamine (1) in high yield.

Decentralized MRAC for Large-Scale Interconnected Systems With State and Input Delays by Integrators Inclusion

2017 ◽  
Vol 139 (9) ◽  
Author(s):  
Seyed Hamid Hashemipour ◽  
Nastaran Vasegh ◽  
Ali Khaki Sedigh
Keyword(s):  
Large Scale ◽  
Practical Method ◽  
Open Loop ◽  
Loop System ◽  
Input Delay ◽  
Time Varying ◽  
Delay Compensation ◽  
State And Input Delays ◽  
Input Delays ◽  
Model Reference Adaptive

This paper investigates the problem of decentralized model reference adaptive control (MRAC) for a class of large-scale systems with time-varying delays in the interconnected terms and state and input delays. The upper bounds of interconnection terms with time-varying delays and external disturbances are assumed to be completely unknown. By integrators inclusion, a dynamic input delay compensator is established for input delay compensation and it is used as a practical method for state calculation x(t + R). Also, a method is presented for a class of decentralized feedback controllers, which can evolve the closed-loop system error uniformly bounded stable. As a numerical example, the proposed technique is applied to an unstable open-loop system to show the feasibility and effectiveness of the method.

The Production of Reduced Graphene Oxide by a Low-Cost Vacuum System for Supercapacitor Applications

2018 ◽  
Vol 930 ◽  
pp. 609-612
Author(s):  
Quezia Cardoso ◽  
Franks Martins Silva ◽  
Ligia Silverio Vieira ◽  
Julio Cesar Serafim Casini ◽  
Solange Kazume Sakata ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Large Scale ◽  
Low Cost ◽  
High Vacuum ◽  
Cost Effective ◽  
Practical Method ◽  
Raw Material ◽  
Vacuum System ◽  
X Ray ◽  
Pump Pressure

Graphene has attracted significant interest because of its excellent electrical properties. However, a practical method for producing graphene on a large scale is yet to be developed. Graphene oxide (GO) can be partially reduced to graphene-like sheets by removing the oxygen-containing groups and recovering the conjugated structure. GO can be produced using inexpensive graphite as the raw material via cost-effective chemical methods. High vacuum and temperature (10−7 mbar and 1100°C, respectively) conditions are well-known to enable the preparation of reduced powder at the laboratory scale. However, a large-scale high vacuum reduction system that can be routinely operated at 10−7 mbar requires considerable initial capital as well as substantial operational and maintenance costs. The current study aims at developing an inexpensive method for the large-scale reduction of graphene oxide. A stainless steel vessel was evacuated to backing-pump pressure (10−2 mbar) and used to process GO at a range of temperatures. The reduction of GO powder at low vacuum pressures was attempted and investigated by X-ray diffraction and Fourier transform infrared spectroscopy. The experimental results of processing GO powder at various temperatures (200–1000°C) at relatively low pressures are reported. The microstructures of the processed materials were investigated using scanning electron microscopy and chemical microanalyses via energy dispersive X-ray analysis.

The Impact of Learning and Labor Attrition on Worker Flexibility in Dual Resource Constrained Job Shops

1993 ◽  
Vol 24 (3) ◽  
pp. 641-664 ◽  
Author(s):  
Manoj K. Malhotra ◽  
Timothy D. Fry ◽  
Hemant V. Kher ◽  
Joan M. Donohue
Keyword(s):  
Job Shops ◽  
Resource Constrained ◽  
Worker Flexibility ◽  
The Impact

scholarly journals Industry, government, and community: power and leadership in a resource constrained DMO

2014 ◽  
Vol 69 (1) ◽  
pp. 47-58 ◽  
Author(s):  
Susan L. Slocum ◽  
Sally Everett
Keyword(s):  
Rural Development ◽  
Small Businesses ◽  
Large Scale ◽  
Rural Landscape ◽  
Destination Marketing ◽  
Resource Constrained ◽  
Content Type ◽  
Study Approach ◽  
Development Agencies ◽  
Marketing Messages

Purpose – The purpose of this paper is to explore a resource-constrained Destination Marketing Organization (DMO) to assess the power struggles inherent in community tourism initiatives when leadership is weakened through shrinking resources. Design/methodology/approach – Using a comparative instrumental case study approach, this paper analyses three separate studies within Experience Bedfordshire to develop a comprehensive picture of governance within a single tourism destination. Findings – The results show that privately held attractions, hospitality businesses, and transportation authorities retain control over key marketing messages. Visitor and stakeholder surveys indicate that a more sustainable form of rural development, based on natural/cultural attractions and the development of bed and breakfast and artisan small businesses is the preferred development path. Unfortunately, the increasing use of Tourism Information Centres by local residents, as opposed to tourists, has reduced support by key power holders in the community, thereby forcing major industry restructure. Research limitations/implications – This research was conducted during the transitionary period as the Rural Development Agencies were being dissolved in the UK and the new Local Enterprise Partnership system was being implemented in early 2011. It is still too early to anticipate how this new system will affect destination marketing in the long run. Practical implications – This paper argues that commercial interests ultimately control the destination image in this resource-constrained region, and its marketing messages which are currently focused on high adventure and large scale development are pursued to the detriment of local wishes and rural landscape development. Originality/value – This paper is the first article to address the transition from the Rural Development Agencies to the Local Enterprise Partnerships within a tourism and destination marketing framework.

Practical Method for Damage Evaluation Based on Point Estimate Considering Uncertainty of Structural Properties

2015 ◽  
Vol 802 ◽  
pp. 255-260
Author(s):  
Kahori Iiyama ◽  
Masataka Hoso ◽  
Takanori Ishida ◽  
Kohei Fujita ◽  
Yoshihiro Yamazaki ◽  
...  
Keyword(s):  
Structural Properties ◽  
Model Uncertainty ◽  
Structural Damage ◽  
Large Scale ◽  
Practical Method ◽  
Point Estimate ◽  
Damage Evaluation ◽  
Building Structures ◽  
Large Scale Simulation ◽  
Seismic Simulation

This study introduces a practical method for evaluating structural damage based on a large-scale simulation targeting expansive areas, like whole cities. In such a seismic simulation that deals with numerous building structures, it is desirable to estimate the damage based on a stochastic evaluation considering the uncertainty of structural properties. This is because an accurate modeling of numerous building structures, according to each designed value, would require a great deal of time. However, a damage evaluation considering the model uncertainty generally involves numerous calculations and is inadequate for such a large-scale simulation. Therefore, we propose a method using the point estimate technique which can estimate the probability of damage under model uncertainty from a small number of calculations. The applicability and usefulness of the proposed method is evaluated by comparing it to the method based on a Monte Carlo simulation.

Applications of Modified Equivalent Load Method in the Possibility of the Transportation of Large Equipment

2011 ◽  
Vol 243-249 ◽  
pp. 1957-1962
Author(s):  
Jun Tao Kang ◽  
Hui Hui Zhang
Keyword(s):  
Large Scale ◽  
Practical Method ◽  
Distribution Coefficients ◽  
Affecting Factors ◽  
Check Calculation ◽  
Equivalent Load Method ◽  
Discriminative Method ◽  
Pass Through ◽  
Equivalent Load ◽  
Feasible Study

When the transport vehicles of large equipment pass through bridges, the main check-calculation coefficients affecting the bridge bearing capacity are the load transverse distribution coefficients, impact coefficient and load safety coefficient. Base on these affecting factors, this paper put forward a discriminant for modified equivalent load method. The triangle influencing line method is applied in measuring the equivalent load of commonly used vehicle plates for transportation of large equipment. Finally this seeks to verify and modify the accuracy and convenience of equivalent load discriminative method through engineering examples and thus suggests a concise and practical method for engineers and technicians： to conduct feasible study for bridge transportation for large scale equipments.

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