National Defence University, Pakistan

About: National Defence University, Pakistan is a education organization based out in Islamabad, Pakistan. It is known for research contribution in the topics: Context (language use) & Decision support system. The organization has 802 authors who have published 816 publications receiving 3701 citations. The organization is also known as: National Defence University of Pakistan & National Defence University Islamabad.

Evaluation Of Investment Alternatives Using Present Worth Analysis With Simplified Neutrosophic Sets

Abstract: Engineering economics is the method of evaluating and choosing the best alternative among many alternatives according to specified economic criteria. Investment analysis is a branch of engineering economics focuses on choosing the most profitable investment option for a company. Because of the insufficient data in investment analysis, decision makers use fuzzy logic in order to make evaluation easier. This paper develops simplified neutrosophic present worth analysis methodology in order to overcome difficulties in defining membership function. The numerical example illustrates the applications of the developed formula. The result of developed methodology is compared with classical present worth analysis and intuitionistic present worth analysis. The comparison results indicate that investment evaluation problem can be tackled by using the proposed methodology effectively.DOI: http://dx.doi.org/10.5755/j01.ee.29.3.19392

A multi-objective location analytics model for temporary emergency service center location decisions in disasters

Abstract: This study presents a real-world multi-objective facility location analytics model for determining the number and locations of Temporary Emergency Service Centers (TESCs) for a regional natural gas distribution company in Turkey. These centers are set up temporarily after natural disasters (i.e., earthquakes, floods, storms) in response to emergencies like gas leaks and distribution problems. The proposed model considers three objectives, including p-median, maximal coverage, and p-center to minimize average and maximum transfer time while accommodating as many victims as possible within predetermined ranges. The proposed method uses the ITER-FLOC (Iterative Facility Location) algorithm to solve the TESC location problem. The proposed model employs an integrated and iterative branch and bound algorithm with goal programming. The solution approach provides decision-makers with a set of Pareto optimal solutions and a unique compromise solution for all objectives incorporated in the decision analytics model.

Synthesis of the Structure of Multilevel Hierarchical Systems of Increased Survivability Based on a Subjective Probability Model

Abstract: The paper is devoted to the synthesis of complex, multilevel hierarchical systems of high survivability, in particular, telecommunication (computer) networks. The computer network is constantly exposed to the destructive effects of the environment in which it operates. Therefore, there is an urgent problem of increasing survivable telecommunication (computer) networks for counteract of such influences, and maintaining the efficiency of such systems.Destructive effects on the network are usually random, but the assessment of such random events, based on classical probability theory, encounters serious difficulties because such events are not systematic and are not massive, which are necessary to assess the frequency of events that determine their classical probabilities.The paper proposes a model for the synthesis of a survivable hierarchical telecommunication (computer) networks. This model is formulated as the problem of nonlinear Boolean programming. The model uses subjective probabilities of efficiency of connection of various devices of a network in the conditions of destructive influences. The network is formed according to the criterion of maximum survivability (subjective probability of network operation under destructive influences).The proposed approach is studied on hierarchical telecommunication (computer) networks. However, the generality of the approach to the construction of survivable hierarchical systems, gives hope for the implementation of the developed approach to the synthesis of survivable multilevel hierarchical systems in other areas, including organizational management, political and economic systems.

Observation of Forward Neutron Multiplicity Dependence of Dimuon Acoplanarity in Ultraperipheral Pb-Pb Collisions at sNN =5.02 TeV

Abstract: The first measurement of the dependence of $\gamma\gamma \to \mu^{+}\mu^{-}$ production on the multiplicity of neutrons emitted very close to the beam direction in ultraperipheral heavy ion collisions is reported. Data for lead-lead interactions at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV, with an integrated luminosity of approximately 1.5 nb$^{-1}$, were collected using the CMS detector at the LHC. The azimuthal correlations between the two muons in the invariant mass region 8 $\lt m_{\mu\mu} \lt$ 60 GeV are extracted for events including zero, one, or at least two neutrons detected in the forward pseudorapidity range $|\eta| \lt$ 8.3. The back-to-back correlation structure from leading-order photon-photon scattering is found to be significantly broader for events with a larger number of emitted neutrons from each nucleus, corresponding to interactions with a smaller impact parameter. This observation provides a data-driven demonstration that the average transverse momentum of photons emitted from relativistic heavy ions has an impact parameter dependence. These results provide new constraints on models of photon-induced interactions in ultraperipheral collisions. They also provide a baseline to search for possible final-state effects on lepton pairs caused by traversing a quark-gluon plasma produced in hadronic heavy ion collisions.