In this paper we consider the problem of no-wait cyclic scheduling of identical parts in an m-machine production line in which a robot is responsible for moving each part from a machine to another. The aim is to find the minimum cycle time for the so-called 2-cyclic schedules, in which exactly two parts enter and two parts leave the production line during each cycle. The earlier known polynomia...

In this report we describe a case of typhoid fever in a Czech patient with history of travel to India and discuss antibiotic treatment failure which led to the relapse of fever. Case report Travel history A previously healthy 31-year-old man from the Czech Republic visited India from 2 October to 28 November 2008. Before leaving the Czech Republic he had received neither vaccination (travellers...

In two empirical studies, the impact of attitudes and environmental knowledge on driving distance, travel behaviour and acceptance of various trac restrictions was investigated. The ®rst study included the population in Lund, southern Sweden, and the second the politicians and civil servants responsible for transports and environment in the same city. Comparisons of the two samples revealed si...

Halo coronal mass ejections (HCMEs) are responsible of the most severe geomagnetic storms. A prediction of their geoeffectiveness and travel time to Earth’s vicinity is crucial to forecast space weather. Unfortunately coronagraphic observations are subjected to projection effects and do not provide true characteristics of CMEs. Recently, Michalek (2006, Solar Phys., 237, 101) developed an asymm...

Aerospace medicine is the medical discipline responsible for assessing and conserving the health, safety, and performance of individuals involved in air and space travel. With the upward trend in airline travel, flight-related oral conditions requiring treatment have become a source of concern for aircrew members. Awareness and treatment of any potential physiological problems for these aircrew...

The United Nations Environment Programme (UNEP) and the World Tourism Organization (WTO) define sustainable tourism as a “„Tourism that takes full account of its current and future economic, social and environmental impacts, addressing the needs of visitors, the industry, the environment and host communities”. It requires informed participation of relevant stakeholders and strong political lead...

Infectious disease threat events (IDTEs) are increasing in frequency worldwide. We analyzed underlying drivers of 116 IDTEs detected in Europe during 2008-2013 by epidemic intelligence at the European Centre of Disease Prevention and Control. Seventeen drivers were identified and categorized into 3 groups: globalization and environment, sociodemographic, and public health systems. A combination...

This article aims at identifying the factors involved in affecting the travel demand to Iran. The hypothesis of the research specifies the variable of “domestic social unrest and insecurity” as the most significant obstacle that stands against an expansion of the demand for travel to Iran. To test the above hypothesis, first several demand models that have been proposed to study demand for tour...

Travel journals from different historical periods contain valuable insights that could be analyzed from different aspects and through that we can understand other people’s points of view about us. Description of different cities in travel literature represents French travelers’ views about these cities besides informing us about the quality and quantity of those cities at the times. “Represen...