Air quality in tramway and high-level service buses: A mixed experimental/modeling approach to estimating users' exposure

2018 ◽  
Vol 65 ◽  
pp. 244-263 ◽  
Author(s):  
Bogdan Muresan ◽  
Denis François
Keyword(s):  
Air Quality ◽  
Experimental Modeling ◽  
Modeling Approach ◽  
High Level

scholarly journals Methodology of synchronization among strategy and operation. A standards-based modeling approach

2017 ◽  
Vol 37 (2) ◽  
pp. 111-119
Author(s):  
VICTOR EDWIN COLLAZOS ◽  
HELGA DUARTE AMAYA
Keyword(s):  
Information Technology ◽  
Information System ◽  
Enterprise Architecture ◽  
Business Processes ◽  
Modeling Approach ◽  
Operational Level ◽  
Alignment Process ◽  
Level Design ◽  
High Level ◽  
Help Model

Enterprise Architecture (EA) has gained importance in recent years, mainly for its concept of “alignment” between the strategic and operational levels of organizations. Such alignment occurs when Information Technology (IT) is applied correctly and timely, working in synergy and harmony with strategy and the operation to achieve mutually their own goals and satisfy the organizational needs.Both the strategic and operational levels have standards that help model elements necessary to obtain desired results. In this sense, BMM and BPMN were selected because both have the support of OMG and they are fairly well known for modelling the strategic level and operational level, respectively. In addition, i* modeling goal can be used for reducing the gap between these two standards. This proposal may help both the high-level design of the information system and to the appropriate identification of the business processes that will support it.This paper presents a methodology for aligning strategy and the operation based on standards and heuristics. We have made a classification for elements of the models and, for some specific cases, an extension of the heuristics associated between them. This allows us to propose methodology, which uses above-mentioned standards and combines mappings, transformations and actions to be considered in the alignment process.

scholarly journals Effect of Air Purifier Use in the Classrooms on Indoor Air Quality—Case Study

Atmosphere ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1606
Author(s):  
Małgorzata Basińska ◽  
Michał Michałkiewicz ◽  
Katarzyna Ratajczak
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Air Purification ◽  
Portable Devices ◽  
Microscopic Fungi ◽  
Before And After ◽  
Air Purifier ◽  
High Level

Dissatisfaction with indoor air quality is common even in relatively new or renovated Polish school buildings. To improve air quality in educational buildings, portable devices have seen increased use, for which manufacturers guarantee a high level of indoor air purification. However, their optimized operation largely depends on their correct use. The aim of this article was to determine the effectiveness of air purification in a primary school using an air purification device with an analysis of the classroom indoor air quality (IAQ). Two criteria were used, microbiological and particulate matter concentration. Measurements were made before device installation and during its continuous operation, and before and after lessons on chosen days. Measurements related to IAQ did not detect clear differences in the analyzed measurement periods. For microbiological contamination, in the morning before lessons, the total count for all bacteria and microscopic fungi was definitely lower than after lessons. Comparing the periods before and after device installation, no clear tendency for reducing the bacteria count or microscopic fungi occurred during air purifier operation, nor was there any noticeable trend in the reduction of particulate matter. There was no improvement in air quality in the classrooms during the operation of the purification devices.

scholarly journals Air quality analysis through measurement of pb levels in blood using atomic absorption spectrophotometer

2021 ◽  
Vol 1 (2) ◽  
pp. 89-95
Author(s):  
Uitumen Erdenezul
Keyword(s):  
Air Quality ◽  
Atomic Absorption ◽  
Threshold Value ◽  
Daily Activities ◽  
Atomic Absorption Spectrophotometer ◽  
Quality Analysis ◽  
Observational Method ◽  
The Poor ◽  
Pb Exposure ◽  
High Level

Air pollution is a problem that needs attention, especially pollution by heavy metals such as lead (Pb). This research was conducted to measure the levels of Pb in the blood of people who do a lot of daily activities on the highway in the Ulaanbaatar region, Mongolia, so that an overview of the level of exposure to Pb in the air is obtained. The study was conducted using an observational method by measuring the blood directly from the participants using an atomic absorption spectrophotometer. The participants involved were 20 people who met the criteria. The results showed that the average level of Pb in the blood of people who had daily activities on the highway was 8.97 ppm. Where the smallest level is 5.12 ppm and the highest level is 12.06 ppm. This value is far above the threshold value determined by WHO, which is 0.05 ppm. Therefore, it can be concluded that the air quality in the Ulaanbaatar area is in the poor category with a high level of Pb exposure.

Molecular Thermodynamics for Aggregation of Surfactants with Alkylbenzene or Branched Alkane Tails: An Experimental-Modeling Approach

2021 ◽  
Vol 532 ◽  
pp. 112918
Author(s):  
G.D. Barbosa ◽  
C.L.M. Camargo ◽  
G.B. Freitas ◽  
A.C.P. Duncke ◽  
L.B.S. Balestrin ◽  
...  
Keyword(s):  
Experimental Modeling ◽  
Modeling Approach ◽  
Molecular Thermodynamics

scholarly journals Oligomer formation in the troposphere: from experimental knowledge to 3-D modeling

2016 ◽  
Vol 9 (4) ◽  
pp. 1361-1382 ◽  
Author(s):  
Vincent Lemaire ◽  
Isabelle Coll ◽  
Florian Couvidat ◽  
Camille Mouchel-Vallon ◽  
Christian Seigneur ◽  
...  
Keyword(s):  
Air Quality ◽  
Secondary Organic Aerosol ◽  
Organic Aerosol ◽  
Kinetic Process ◽  
Critical Element ◽  
Order Kinetic ◽  
Continental Scale ◽  
Oligomer Formation ◽  
Modeling Approach ◽  
Ph Dependent

Abstract. The organic fraction of atmospheric aerosols has proven to be a critical element of air quality and climate issues. However, its composition and the aging processes it undergoes remain insufficiently understood. This work builds on laboratory knowledge to simulate the formation of oligomers from biogenic secondary organic aerosol (BSOA) in the troposphere at the continental scale. We compare the results of two different modeling approaches, a first-order kinetic process and a pH-dependent parameterization, both implemented in the CHIMERE air quality model (AQM) (www.lmd.polytechnique.fr/chimere), to simulate the spatial and temporal distribution of oligomerized secondary organic aerosol (SOA) over western Europe. We also included a comparison of organic carbon (OC) concentrations at two EMEP (European Monitoring and Evaluation Programme) stations. Our results show that there is a strong dependence of the results on the selected modeling approach: while the irreversible kinetic process leads to the oligomerization of about 50 % of the total BSOA mass, the pH-dependent approach shows a broader range of impacts, with a strong dependency on environmental parameters (pH and nature of aerosol) and the possibility for the process to be reversible. In parallel, we investigated the sensitivity of each modeling approach to the representation of SOA precursor solubility (Henry's law constant values). Finally, the pros and cons of each approach for the representation of SOA aging are discussed and recommendations are provided to improve current representations of oligomer formation in AQMs.

A High Level Modeling Approach for Reconfigurable System Architecting

2009 ◽  
Vol 42 (21) ◽  
pp. 7-12
Author(s):  
L. Dorie ◽  
O. Pasquier ◽  
S. Le Nours ◽  
JF. Diouris
Keyword(s):  
Modeling Approach ◽  
Reconfigurable System ◽  
High Level Modeling ◽  
High Level
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