Evaluation of the ‘Fugacity' (FEQUM) and the ‘Exams' Chemical Fate and Transport Models: A Case Study on the Pollution of the Norrsundet Bay (Sweden)

1988 ◽  
Vol 20 (2) ◽  
pp. 1-12 ◽  
Author(s):  
Knut Kolset ◽  
Anders Heiberg
Keyword(s):  
Dispersion Model ◽  
Correlation Coefficients ◽  
Fate And Transport ◽  
Transport Models ◽  
Water And Sediment ◽  
Sediment Flow ◽  
Kraft Mill ◽  
Using Data ◽  
Made In

Two different models have been used to investigate how chemicals present in wastewater from a kraft mill are transported and spread in an aquatic environment. The models, FEQUM (Fugacity EQUilibrium Model) and EXAMS, are presented, their characteristics explained and a comparison of the models is made. In FEQUM the concept of fugacity is considered as the driving force behind chemical transport. The EXAMS dispersion model uses water and sediment flow as the basis for calculating the dispersion of chemicals. FEQUM encompasses the whole environment, water, air, soil, sediments, suspended matter in water and biota, whereas EXAMS includes the aquatic domain only. Both models have been applied to the Norrsundet area. Norrsundet is a heavily polluted bay on the east coast of Sweden. The pollution is mainly due to a kraft mill located in the area. The models were calibrated using data on chloroform in wastewater and seawater, and then tested on four other pollutants present in the wastewater. Both models give satisfactory results for the compounds investigated, tetrachlorocatechol constituting the only exception. Correlation coefficients between calculated and measured concentrations vary from 0.86 to 0.97. The poor results obtained for tetrachlorocatechol are probably due to the especially high affinity of this compound for suspended particles.

scholarly journals Influence of the variability of the odour emission rate on its impact range: a case study of the selected industrial source

2019 ◽  
Vol 100 ◽  
pp. 00070 ◽  
Author(s):  
Elżbieta Romanik ◽  
Yaroslav Bezyk ◽  
Marcin Pawnuk ◽  
Urszula Miller ◽  
Agnieszka Grzelka
Keyword(s):  
Emission Rate ◽  
Dispersion Model ◽  
Grid Size ◽  
Model Calculations ◽  
Gas Treatment ◽  
Industrial Source ◽  
Odour Concentration ◽  
Made In ◽  
Dynamic Olfactometry

Odour concentration measurements in a chosen industrial source were made in this study using the method of dynamic olfactometry. The two different scenarios considered the variation of the odour emission rate as input for the dispersion model were compared for the period 2017 (before installation of the equipment for gas treatment) and 2018 (after implementation of purifying technologies). In this paper the odour impact range was determined by applying model calculations conducted in the Polish reference dispersion model – OPERAT FB software for the grid size 2 x 2 km. The conducted research shows a significant improvement in the odour impact range of chosen industrial source in year 2018 compared to 2017.

Uncertainty in multi-media fate and transport models: A case study for TNT life cycle assessment

2014 ◽  
Vol 494-495 ◽  
pp. 104-112 ◽  
Author(s):  
Michael Mayo ◽  
Zachary A. Collier ◽  
Vu Hoang ◽  
Mark Chappell
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Fate And Transport ◽  
Transport Models ◽  
Multi Media

scholarly journals Kesesuaian Operasional Produk Asuransi Syariah dengan Fatwa DSN MUI No:21/DSN-MUI/X/2001 (Studi Kasus AJB Bumiputera 1912 Cabang Surabaya)

2015 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
Rian Rahmat Hidayat ◽  
Irham Zaki
Keyword(s):  
Rapid Development ◽  
Secondary Data ◽  
Primary Data ◽  
Insurance Company ◽  
Investment Funds ◽  
Wide Range ◽  
Qualitative Descriptive ◽  
Using Data ◽  
Made In

Sharia insurance in Indonesia has experienced a fairly rapid development since the promulgation of MUI fatwa number:21/DSN-MUI/X/2001 about sharia insurance. However, that is still questionable is does the sharia insurance company really run the product operational based on MUI fatwa.This study aims to determine whether product operational of sharia insurance of AJB Bumiputera1912 is in conformity with the sharia rules to follow six indicator akkad, premi, claims, investment, reinsurance, and management of the fund from MUI fatwa or not.The research method is used is a case study with a qualitative descriptive approach. The data used in this study is that the data derived from primary data obtained from fieldwork and secondary data derived from the literature and a wide range of written document. This study using data derived from the management of sharia insurance AJB Bumiputera 1912 in the branch of Surabaya and sharia insurance participants of AJB Bumiputera 1912.The results of this research is operational products of sharia insurance of AJB Bumiputera 1912 were in accordance with Indonesian Ulama Council fatwa DSN Number:21/DSNMUI/X/2001. The suitability reflected from the existence of akkad tabarru’ and akkad tijarah as investment funds (mudharabah), management of premium funds based on sharia, claims fund based on first contract, investment made in accordance with the mandate of participants, then reinsurance process done only to sharia-based reinsurance company.

A case study of global ULF pulsations using data from space-borne and ground-based magnetometers and a SuperDARN radar

2011 ◽  
Vol 17 (6) ◽  
pp. 54-67
Author(s):  
A.S. Potapov ◽  
◽  
E. Amata ◽  
T.N. Polyushkina ◽  
I. Coco ◽  
...  
Keyword(s):  
Using Data

Sediment transport under dry weather conditions in a small sewer system

1998 ◽  
Vol 37 (1) ◽  
pp. 155-162
Author(s):  
Flemming Schlütter ◽  
Kjeld Schaarup-Jensen
Keyword(s):  
Sediment Transport ◽  
Field Data ◽  
Field Measurements ◽  
Weather Conditions ◽  
Sewer System ◽  
Transport Models ◽  
Sewer Systems ◽  
Combined Sewer ◽  
Initial Results

Increased knowledge of the processes which govern the transport of solids in sewers is necessary in order to develop more reliable and applicable sediment transport models for sewer systems. Proper validation of these are essential. For that purpose thorough field measurements are imperative. This paper renders initial results obtained in an ongoing case study of a Danish combined sewer system in Frejlev, a small town southwest of Aalborg, Denmark. Field data are presented concerning estimation of the sediment transport during dry weather. Finally, considerations on how to approach numerical modelling is made based on numerical simulations using MOUSE TRAP (DHI 1993).

The Interactional Foundations of Economic Forecasting

2018 ◽  
Author(s):  
Werner Reichmann
Keyword(s):  
Economic Forecasting ◽  
Political Actors ◽  
Social Legitimacy ◽  
Using Data ◽  
Economic Future ◽  
Economic Forecasts ◽  
Epistemic Process

How do economic forecasters produce legitimate and credible predictions of the economic future, despite most of the economy being transmutable and indeterminate? Using data from a case study of economic forecasting institutes in Germany, this chapter argues that the production of credible economic futures depends on an epistemic process embedded in various forms of interaction. This interactional foundation—through ‘foretalk’ and ‘epistemic participation’ in networks of internal and external interlocutors—sharpens economic forecasts in three ways. First, it brings to light new imaginaries of the economic future, allowing forecasters to spot emerging developments they would otherwise have missed. Second, it ensures the forecasts’ social legitimacy. And finally, it increases the forecasts’ epistemic quality by providing decentralized information about the intentions and assumptions of key economic and political actors.

scholarly journals Extending Geodemographics Using Data Primitives: A Review and a Methodological Proposal

2021 ◽  
Vol 10 (6) ◽  
pp. 386
Author(s):  
Jennie Gray ◽  
Lisa Buckner ◽  
Alexis Comber
Keyword(s):  
Social Dynamics ◽  
Feature Space ◽  
Social Processes ◽  
Multiple Time ◽  
Current State ◽  
Cluster Label ◽  
Static Data ◽  
The Social ◽  
Using Data

This paper reviews geodemographic classifications and developments in contemporary classifications. It develops a critique of current approaches and identifiea a number of key limitations. These include the problems associated with the geodemographic cluster label (few cluster members are typical or have the same properties as the cluster centre) and the failure of the static label to describe anything about the underlying neighbourhood processes and dynamics. To address these limitations, this paper proposed a data primitives approach. Data primitives are the fundamental dimensions or measurements that capture the processes of interest. They can be used to describe the current state of an area in a multivariate feature space, and states can be compared over multiple time periods for which data are available, through for example a change vector approach. In this way, emergent social processes, which may be too weak to result in a change in a cluster label, but are nonetheless important signals, can be captured. As states are updated (for example, as new data become available), inferences about different social processes can be made, as well as classification updates if required. State changes can also be used to determine neighbourhood trajectories and to predict or infer future states. A list of data primitives was suggested from a review of the mechanisms driving a number of neighbourhood-level social processes, with the aim of improving the wider understanding of the interaction of complex neighbourhood processes and their effects. A small case study was provided to illustrate the approach. In this way, the methods outlined in this paper suggest a more nuanced approach to geodemographic research, away from a focus on classifications and static data, towards approaches that capture the social dynamics experienced by neighbourhoods.

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