scholarly journals Evaluation of operating conditions of cargo transportation by cabotage in Brazil: A multicriteria approach from the shipowners’ point of view

2021 ◽  
Vol 10 (8) ◽  
pp. e55410817693
Author(s):  
Aldery Silveira Júnior ◽  
Rafael Rabelo Nunes ◽  
Evaldo César Cavalcante Rodrigues
Keyword(s):  
Decision Aid ◽  
Evaluation Model ◽  
Point Of View ◽  
Operating Conditions ◽  
Brazilian Coast ◽  
Multicriteria Decision Aid ◽  
Global Evaluation ◽  
Transportation Mode ◽  
Transportation Services ◽  
Cargo Transportation

The purpose of this study was to develop and apply a model to evaluate the operating conditions of cargo transportation by cabotage in Brazil, from the perspective of Brazilian shipping companies operating in this segment. The evaluation model was developed based on the Multicriteria Decision Aid (MCDA) methodology, conceived under the constructivist paradigm and with the participation of a team of experts in cabotage, who built a framework for evaluation of this transportation mode. The global evaluation of the conditions of cargo transportation by cabotage in Brazil, based on this framework, was scored 3.9, - on a scale of zero to ten, - a score considered extremely low for a segment of cargo transportation so important and with such weight to the Brazilian economy. It was concluded that this score reflects the situation of shortage, neglect, and abandonment currently faced by shipping companies that offer cargo transportation services along the Brazilian coast. This work contributes to the construction of a multicriteria evaluation model, which can be replicated for other modes of transportation, with the necessary adjustments.

scholarly journals Multicriteria decision aid tool for the operational management of an industry: a constructivist case

2017 ◽  
Vol 14 (2) ◽  
pp. 165
Author(s):  
Sandro César Bortoluzzi ◽  
Sandra Rolim Ensslin ◽  
Leonardo Ensslin ◽  
Marcos Ottoni De Almeida
Keyword(s):  
Performance Evaluation ◽  
Organizational Performance ◽  
Decision Aid ◽  
Evaluation Model ◽  
Research Result ◽  
Multicriteria Decision Aid ◽  
Multicriteria Decision ◽  
Performance Evaluation Model ◽  
Operational Management ◽  
A Performance

The objective of this work is to construct a performance evaluation model to provide support to a production director in the management of the productive operations of a furniture industry. In this sense, we sought through the Multicriteria Decision Aid Constructivist Methodology (i) to identify the factors considered important by the production director for evaluating the performance of productive operations, (ii) to measure each criterion of performance evaluation, (iii) to integrate the criteria to allow the evaluation of organizational performance at the tactical and strategic levels and (iv) to develop a process to manage the actions of productive operations improvement.As a research result we have a performance evaluation model for supporting the management of the productive operations. We conclude that the MCDA-C allowed for building the knowledge of the decision-maker on how to identify and measure the critical variables and manage the performance of the productive operations. 

Tertiary Nitrification Pilot Plants on Parisian Waste Water

1990 ◽  
Vol 22 (1-2) ◽  
pp. 347-352 ◽  
Author(s):  
C. Paffoni ◽  
B. Védry ◽  
M. Gousailles
Keyword(s):  
Waste Water ◽  
Metropolitan Area ◽  
Fixed Bed ◽  
Point Of View ◽  
Operating Conditions ◽  
Research Center ◽  
Daily Output ◽  
Practical Point ◽  
Fixed Bed Reactors

The Paris Metropolitan area, which contains over eight million inhabitants, has a daily output of about 3 M cu.meters of wastewater, the purification of which is achieved by SIAAP (Paris Metropolitan Area Sewage Service) in both Achères and Valenton plants. The carbon pollution is eliminated from over 2 M cu.m/day at Achères. In order to improve the quality of output water, its tertiary nitrification in fixed-bed reactors has been contemplated. The BIOFOR (Degremont) and BIOCARBONE (OTV) processes could be tested in semi-industrial pilot reactors at the CRITER research center of SIAAP. At a reference temperature of 13°C, the removed load is approximately 0.5 kg N NH4/m3.day. From a practical point of view, it may be asserted that in such operating conditions as should be at the Achères plant, one cubic meter of filter can handle the tertiary nitification of one cubic meter of purified water per hour at an effluent temperature of 13°C.

Research on Related Model for Urban Public Crisis Handle Mechanism

2014 ◽  
Vol 989-994 ◽  
pp. 5540-5543
Author(s):  
Yong Chang Ren
Keyword(s):  
Crisis Management ◽  
Evaluation Model ◽  
Point Of View ◽  
Theoretical Point ◽  
Analysis Model ◽  
The Public ◽  
Public Crisis ◽  
Crisis Events ◽  
Response And Recovery ◽  
The Relationship

China is in a critical period of urbanization, and various social contradictions continue to be accumulated, emerged and enlarged, so public crisis management mechanism has been highly valued by governments at all levels with the public crisis events are occurred frequently. The paper conducts study for the problems in the current urban public crisis handle mechanism. First, the evaluation model of crisis management can be researched, and crisis management can be divided into four stages to evaluate respectively, they are Reduction, Readiness, Response and Recovery; then, we should research crisis prediction model to strengthen prediction, prevention and monitoring of the crisis before the crisis happened; finally, stakeholders analysis model should be studied, and scientific analyzing the interests of the various stakeholders and the relationship among them. From the theoretical point of view, the paper carries on a study for crisis handle mechanism to provide support for improving the crisis handle level.

Assessing non-additive utility for multicriteria decision aid

2004 ◽  
Vol 158 (3) ◽  
pp. 734-744 ◽  
Author(s):  
Silvia Angilella ◽  
Salvatore Greco ◽  
Fabio Lamantia ◽  
Benedetto Matarazzo
Keyword(s):  
Decision Aid ◽  
Multicriteria Decision Aid ◽  
Multicriteria Decision ◽  
Additive Utility

Model choice in multicriteria decision aid

1997 ◽  
Vol 97 (3) ◽  
pp. 550-560 ◽  
Author(s):  
Tarik Al-Shemmeri ◽  
Bashar Al-Kloub ◽  
Alan Pearman
Keyword(s):  
Decision Aid ◽  
Multicriteria Decision Aid ◽  
Model Choice ◽  
Multicriteria Decision

ADVANCED TYPES OF CHECKERWORK OF REGENERATIVE HEAT EXCHANGERS FOR GLASS FURNACES

2021 ◽  
pp. 3-10
Author(s):  
O. Koshelnik ◽  
S. Hoisan
Keyword(s):  
Phase Transition ◽  
Heat Exchangers ◽  
Heat Storage ◽  
Point Of View ◽  
Operating Conditions ◽  
Flue Gases ◽  
Regenerative Heat ◽  
Exchange Processes ◽  
Glass Furnaces ◽  
Refractory Bricks

One of the ways to increase glass furnaces energy efficiency is to apply heat exchangers for flue gases thermal potential utilization. Flue gases losses is up to 25-40 % of the total amount of heat supplied in the furnace. These losses are influences by such factors as fuel type, furnace and burners design and manufactured product type. Regenerative heat exchangers with various types of heat storage packing is more efficient for high-power furnaces. Such types of regenerator checkerwork as Cowper checkerwork, two types of Siemens checkerwork, Lichte checkerwork and combined checkerwork have already been sufficiently researched, successfully applied and widely used for glass furnaces of various designs. All of its are made of standard refractory bricks. Basket checkerwork and cruciform checkerwork that are made of fused-cast molded refractory materials have been widely used recently as well. Further improvement of regenerative heat exchangers thermal efficiency only by replacing the checkerwork does not seem possible unless their size being increased. But this enlarging is not always realizable during the modernization of existing furnaces. From this point of view heat storage elements with a phase transition, where metal salts and their mixtures are used as a fusible agent look promising for glass furnaces. These elements can accumulate additional amount of heat due to phase transition, which allows to increase significantly heat exchanger thermal rating without its size and operating conditions changing. However, it is necessary to carry out additional studies of this type of checkerwork dealing with analysis of complex unsteady heat exchange processes in regenerators and selection of appropriate materials that satisfy the operating conditions of regenerative heat exchangers so that the checkerwork can be widely used for glass furnaces.

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