Operations research has had a long and distinguished history of work in emergency preparedness and response, airline security, transportation of hazardous materials, and threat and vulnerability analysis. Since the attacks of September 11, 2001 and the formation of the US Department of Homeland Security, these topics have been gathered under the broad umbrella of homeland security. In addition,...

The authors thank the referee for the constructive and helpful comments. Our detailed replies to the referee 2’s comments (in Italic) are given below. Anonymous Referee 2 This manuscript discusses an important topic, the contribution of ion-induced nucleation on atmospheric new particle formation. It is well-written, and in its current form, discreet, compared to the original manuscript. It is ...

Crew scheduling is an important production planning of airlines. Being optimized crew scheduling could make full use of human resources, and reduce operating costs. The traditional airline crew scheduling model is deterministic and does not include potential disruptions due to weather, air traffic control, etc. To take into account of effects of random factors such as weather, air traffic contr...

This article explores the development of previous models to determine hubs in a competitive environment. In this paper, by comparing parameters of the ticket price, travel time and the service quality of hub airports, airline hubs are divided into six categories. The degree of importance of travel time and travel cost are determined by a multivariate Lagrange interpolation method, which can pla...

Statistical algorithms have been developed to detect unusual events or aberrations that may indicate serious problems; e.g., high incidence of infectious diseases (possible epidemics), excessive charges on a credit card or telephone (possible stolen card), or random operations on a computer (attack by a virus). Similar algorithms can be developed to detect unusual combinations of characteristic...

The Flight Operations Risk Assessment System (FORAS) is a risk modeling methodology which represents risk factors and their interrelationships as a fuzzy expert system. A FORAS risk model provides a quantitative relative risk index representing an estimate of the cumulative effects of potential hazards on a single flight operation. FORAS systematizes the process of eliciting human expertise, pr...

The purpose of this paper is to focus on the landing technique during the visual approach, analyze the risk at landing and make instruction to avoid the risk especially for unexperienced pilots. Airline has adopted several dozen of ab initio pilots every year and they normally become captains after flying about ten years as co-pilot. It is necessary in co-pilot for airline to make flight operat...

A global airline has cargo operations in multiple nations and locations. In this paper, we study optimal policies for managing sales agents. At present, for each flight, headquarters retains a portion of the total capacity and allocates the rest to sales agents. Capacity retained by the headquarters is used only after the allocated capacity is exhausted. While each agent is allowed to use any p...

Recently, Radio Frequency Identification (RFID) has received considerable attention and is considered to be the next wave of information technology revolution. The number of RFID applications in different industries is increasing continuously. Cumulative sales of RFID tag is up in 2006 which shows RFID adoption trend in industries to improve their efficiency of operations and to gain a competit...

Megaprogramming is a technology for programming with large modules called megamodules that capture the functionality of services provided by large organizations like banks, airline reservation systems, and city transportation systems. Megamodules are internally homogeneous, independently maintained software systems managed by a community with its own terminology, goals, knowledge, and programmi...