This paper examines the factors that influence QWL and investigate the relationship between QWL and satisfaction among employees working in the Oil and Gas companies in the State of Qatar. While much of the attention been directed to the concept of QWL in developed countries, it has received...

Nachdem die Fahrleistungen von in Deutschland zugelassenen Kraftfahrzeugen nach der Jahrtausendwende zunächst kaum noch zunahmen, stiegen sie im Zuge der wirtschaftlichen Belebung nach 2009 sowohl bei Nutzfahrzeugen als auch bei Personenkraftwagen deutlich. Insgesamt lagen die Fahrleistungen...

Die Europäische Kommission hat in ihrem Grünbuch "Ein Rahmen für die Klima- und Energiepolitik bis 2030" dazu aufgefordert, Einschätzungen für umwelt- und energiepolitische Entwicklungen jenseits des Jahres 2020 zu entwickeln. Allerdings beruht das Grünbuch ebenso wie die "Energy Roadmap...

Die Umsetzung der Energiewende erfordert einen weiteren Ausbau von Windkraft und Photovoltaik in Deutschland. Die Stromerzeugungsmöglichkeiten beider Technologien schwanken stark je nach Wetterlage, Tages- und Jahreszeit. So kann es dazu kommen, dass temporär mehr Strom produziert wird, als zu...

In this paper, a fuzzy multiobjective mathematical programming model for operational transport planning in a supply chain is presented. The objectives of the proposed model are the minimization of the number of used trucks and the total inventory level, by considering vehicle capacities as a...

This paper presents a critical analysis of some of the techniques which are applied in practice to obtain composite indicators from a previous sub-indicator system. In studying each methodology, we identify the advantages and disadvantages associated with them, paying particular attention to...

This paper analyzes the importance of having a network of stations adapted to vehicles carrying dangerous goods. In the r̄st place, it is studied the current demand which is offered by the existing parking areas, and in the second place, it is explained a maximum coverage location model in...

The generalized truck-and-trailer routing problem (GTTRP) constitutes a uniēd model for vehicle routing problems with trailers and a fixed lorry-trailer assignment. The GTTRP is a generalization of the truck-and-trailer routing problem (TTRP), which itself is an extension of the well-known...

In this paper we investigate how to allocate the available budget for agri-environmental measures to maximise environmental benefits and to minimise potential negative side effects resulting for farmers from the implementation of agri-environmental measures. According to the governmental and EU...

In the present paper an analysis of the neo-classical optimization model with linear constraints is proposed. By introducing the dual problem it is shown that the solution to the maximization problem is also a solution to the minimization problem. The purely theoretical model proposes a...