Study on Evaluation Efficiency of Investment for Regional Public Works

The estimation of the influence of a public investment program should include not only the direct effects but also the indirect ones. In these cases the most important benefits are indirect, since they make production possible in other sectors of the economy. In this drafting, the author deals with an evaluation efficiency of investment for regional public works from the standpoint of indirect effects, by preparing the simplified model along the criterion of Jorge Ahumada. Thereupon, such efficiency is defined as the ratio of total value added in the region to the total amortization of direct costs plus associated costs. Then, the Econometric Model and Interregional Input-Output Analysis are promoted to the assumption of the value added and associated costs

Study on a Mathematical Basis of Critical Path Method and its Application

This paper is concerned with establishing the mathematical basis of the Critical Path Method—a new tool for planning and scheduling projects. The mathematical model upon which the Critical Path Method is based is a parametric linear program that has the objective of computing the utility of a project as a function of its duration. In order to solve the parametric linear program, primal dual algorithm may effectively be used and be solved efficiently by network flow method. This paper contains also the application of this algorithm to the scheduling of quaywall construction at Pier No.8E, Port of Kobe

Study on Process of Construction Planning and its Application

In this paper the planning process based on the network techniques is dealt with for a construction project where the project is defined as a function of sequence among jobs included in the project. The planning process consists of three processes : In the first process the set of alternatives of job sequences which satisfy the restriction for the completion time is obtained by the use of devised branch and bound algorithm. In the second process every kind of performance which is useful for the evaluation of construction project is computed for each alternative and further actual restrictions are established for all performances. In the last process alternatives which satisfy all restrictions are obtained by the filtering procedure and an optimal project is selected from them by a definite criterion. An application of this planning process is shown for the elevated railway construction of the New Sanyo Trunk Line

Study on Optimizing Airport Runway Design by Economic Analysis

A rapid increase of air traffic is anticipated by the main airports in Japan. The existing airport facilities of the main airports in Japan are already thought to be insufficient, and it is earnestly requested that these facilities will be reinforced as urgently as possible. It is vital that we determine the ultimate runway capacity to make a plan more accurately for long range development of adequate airport facilities on a schedule which will meet the projected increase in air traffic. Mathematical models have been developed that can be used in forecasting the operating rates of runways with associated delays. These models have been devised covering delays under preemptive priority type operations. The optimum runway design is that which will manage to keep the balance between operating cost and total annual costs of runway. The optimum design then is determined by the economic analysis of the factors that affect runway operations. Economic analysis have been developed that could be used in determining the break-even volume for the improvement of runways

Modeling Multi-Objective, Interbasin, Surface Water Development System with Supplementary Use of Reclamation System

This paper centers on the multi-objective, interbasin, surface water development system, whereby, if necessary, the conjunctive use of reclamation system is assumed to be available. The major objectives of the paper include (i) analysis of the quality of industrial waters blended with renovated waters ; (ii) identification of the relation between the blended water demand and its blending ratio and (iii) modeling and analysis of the coordinated attainments of multiple goals involved in the stated system. A case study is conducted at the interbasin system of the southern part of Hyogo Prefecture and some informative results obtained point to the need of this kind of alternative water utilization systems. The major findings of the study include : (1) The reclamation system is required to be implemented on a certain scale to supplement the industrial water supply. (2) In cases where the permitted-levels of the collection goals related to each river basin are set to be relatively higher, the total amounts of water supply that must be covered by the reclamation systems should be allocated to the system of each basin roughly in proportion to the amounts of its industrial water demand. (3) The increased attainments of the amounts of collection, and in consequence, the increased attainments of the improvement in the blended water quality are achievable only at the sacrifice of economic efficiency. (4) The attainments of the goals are seen to be well-balanced and not biased to any of them, chiefly owing to the L-type utility function underlying the model

Localized Surface Plasmon Resonance Sensor Based on Hetero-core Structured Fiber Optic

AbstractLocalized surface plasmon resonance (LSPR) sensor is constructed by immobilizing gold nanoparticles (AuNPs) on the surface of hetero-core structured fiber optic and characterized as a refractive index sensor. According to increasing of dipping time of the aminated sensing part in the AuNPs suspension, the propagating light intensity near 545nm decreased. According to increasing of the sensor length, in addition, the propagating light intensity at 540nm decreased. The sensor showed that the propagating loss at 545nm increased according to increasing of ethanol concentration in water, derived from the refractive index increase of the mixture