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.

scholarly journals Field testing two flux footprint models

2021 ◽  
Vol 14 (11) ◽  
pp. 7147-7152
Author(s):  
Trevor W. Coates ◽  
Monzurul Alam ◽  
Thomas K. Flesch ◽  
Guillermo Hernandez-Ramirez
Keyword(s):  
Field Study ◽  
Release Rate ◽  
Emission Rate ◽  
Dispersion Model ◽  
Field Testing ◽  
Gas Emission ◽  
Flux Footprint ◽  
Model Calculations ◽  
Area Source ◽  
Large Period

Abstract. A field study was undertaken to investigate the accuracy of two micrometeorological flux footprint models for calculating the gas emission rate from a synthetic 10 × 10 m surface area source, based on the vertical flux of gas measured at fetches of 15 to 50 m downwind of the source. Calculations were made with an easy-to-use tool based on the Kormann–Meixner analytical model and with a more sophisticated Lagrangian stochastic dispersion model. A total of 59 testable 10 min observation periods were measured over 9 d. On average, both models underestimated the actual release rate by approximately 30 %, mostly due to large underestimates at the larger fetches. The accuracy of the model calculations had large period-to-period variability, and no statistical differences were observed between the two models in terms of overall accuracy.

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 Non-destructive handheld XRF study of archaeological composite silver objects—the case study of the late Roman Seuso Treasure

2021 ◽  
Vol 13 (5) ◽  
Author(s):  
Viktória Mozgai ◽  
Bernadett Bajnóczi ◽  
Zoltán May ◽  
Zsolt Mráv
Keyword(s):  
Fluorescence Analysis ◽  
The Body ◽  
High Quality ◽  
X Ray ◽  
Composite Objects ◽  
Mechanical Attachment ◽  
Non Destructive ◽  
Made In ◽  
Late Roman

AbstractThis study details the non-destructive chemical analysis of composite silver objects (ewers, situlas, amphora and casket) from one of the most significant late Roman finds, the Seuso Treasure. The Seuso Treasure consists of fourteen large silver vessels that were made in the fourth–early fifth centuries AD and used for dining during festive banquets and for washing and beautification. The measurements were systematically performed along a pre-designed grid at several points using handheld X-ray fluorescence analysis. The results demonstrate that all the objects were made from high-quality silver (above 90 wt% Ag), with the exception of the base of the Geometric Ewer B. Copper was added intentionally to improve the mechanical properties of soft silver. The gold and lead content of the objects shows constant values (less than 1 wt% Au and Pb). The chemical composition as well as the Bi/Pb ratio suggests that the parts of the composite objects were manufactured from different silver ingots. The ewers were constructed in two ways: (i) the base and the body were made separately, or (ii) the ewer was raised from a single silver sheet. The composite objects were assembled using three methods: (i) mechanical attachment; (ii) low-temperature, lead-tin soft solders; or (iii) high-temperature, copper-silver hard solders. Additionally, two types of gilding were revealed by the XRF analysis, one with remnants of mercury, i.e. fire-gilding, and another type without remnants of mercury, presumably diffusion bonding.

Odour Intensity Assessment at Different Area of a Palm Oil Mill Using Olfactometry Method

2015 ◽  
Vol 802 ◽  
pp. 472-477 ◽  
Author(s):  
Nurashikin Yaacof ◽  
Nastaien Qamaruz Zaman ◽  
Yusri Yusop
Keyword(s):  
Palm Oil ◽  
Emission Rate ◽  
Anaerobic Treatment ◽  
Cooling Pond ◽  
Intensity Assessment ◽  
Offensive Odour ◽  
Volatile Organic ◽  
Odour Concentration ◽  
Volatile Organic Acids ◽  
Palm Oil Mill

Malaysia is one of the world’s largest palm oil exporters, amounting to 39 % of world palm oil production and 44 % of world exports [1]. Palm oil mill usually engaged with odour problem that came from the wastewater treatment pond that released odourous compounds such as ammonia, volatile organic acids, and sulfides. This study was done to investigate odour nuisance from palm oil mill operations and odour emission rate at United Oil Palm (UOP) Mill, Nibong Tebal, Penang, Malaysia. Odour assessment was done on-site at four points and odour sample was taken from four anaerobic treatment ponds. Flux hood method was used and the samples were analysed by using the olfactometry method with six panels. It was found that in the UOP mill, the highest odour emission is from the anaerobic pond 2 with the average specific odour emission rate of 10.88 OUE/sm2, follow by cooling pond, acid pond and anaerobic pond 1. Besides knowing the main source of the odour, this study was run to find the intensity and offensiveness of the palm oil mill odour. A simple questionnaire was asked to the six panels about the odour intensity and odour offensiveness, and the average for both was at 5 (very strong odour) and 3 (definitely offensive odour). Higher level of offensiveness and intensity will increase the odour complaints, but by knowing those levels, it will help in deciding the limit of odour concentration that can be released and the threshold of odour that can be accepted by humans.

Introducing Problem-based Learning to Special Needs Dentistry—A Case Study

2002 ◽  
Vol os9 (1) ◽  
pp. 9-13 ◽  
Author(s):  
Raman Bedi ◽  
Jackie A Champion ◽  
Roger Davies
Keyword(s):  
Special Needs ◽  
Problem Based Learning ◽  
Chi Square ◽  
Training And Education ◽  
Mixed Response ◽  
Conventional Teaching ◽  
The Subject ◽  
Better Than ◽  
Made In

Introduction In order to promote training and education in special-needs dentistry an attempt was made to introduce problem-based learning (PBL) as a method of postgraduate dental education. The aim of this paper was to review the principles of PBL and report on a case study using this methodology. Method The case study was of a PBL session, on the subject of ‘problems of obtaining appropriate dental care for people with epilepsy’, undertaken at a national conference. Delegates were asked to complete a pre- and post-session questionnaire on PBL and their attitudes to the session. Results The session received a mixed response. Only 33 (35%) thought the session was valuable and only 20 (31%) thought it was better than conventional teaching methods and yet over half (55%) said they would like to attend more PBL in special-needs dentistry. Professionals complementary to dentistry were more likely to find the PBL session of value and to prefer the method to a more conventional format than dentists were (chi-square=5.5, df=1, p<0.05 and chi-square=5.9, df=1, p<0.05 respectively). Conclusion Valuable feedback was received from delegates. This will enable improvements to be made in future courses so that the effectiveness of PBL can be optimised.

The "Right to Die": A Case Study in American Lawmaking*

1996 ◽  
Vol 3 (1) ◽  
pp. 49-74
Author(s):  
Alan Meisel
Keyword(s):  
Legal System ◽  
Right To Die ◽  
Judicial Process ◽  
Clinical Issue ◽  
The Press ◽  
American Law ◽  
American Legal System ◽  
The Right ◽  
Made In

AbstractIn the 20 years that have passed since the Karen Quinlan case exposed a simmering clinical issue to the light of day — more precisely, to the press and to judicial process — a consensus has developed in American law about how end-of-life decisionmaking should occur. To be sure, there are dissenting voices from this consensus, but they are often (though not always) about minor issues. By illustrating how this consensus has evolved, this paper explores how law is made in the American legal system and the roles that different legal and extra-legal institutions play in lawmaking.

Case Study Comparison: Limitations in Telehealth Relating to Poverty and Family Support

2021 ◽  
Vol 42 (02) ◽  
pp. 158-164
Author(s):  
Lindsey E. Jorgensen ◽  
Rachel E. Barrett
Keyword(s):  
Family Support ◽  
Pediatric Patients ◽  
Internet Access ◽  
Smart Devices ◽  
Internet Connection ◽  
The Third ◽  
Global Pandemic ◽  
Internet Connections ◽  
Made In

AbstractTelehealth appointments have grown in popularity due to the COVID-19 global pandemic. Three cases presented in this article show several different perspectives where telehealth was utilized. For the first patient, appointments were successfully completed via telehealth; however, the patient's family opted to continue with an unsecure internet connection at a local laundromat. For the second patient, a stable internet connection could not be obtained in his home, thus making telehealth appointments unavailable. The caregiver of this patient ended up driving to the clinic to have adjustments made in person. For the third patient, telehealth appointments were unavailable due to unstable internet connections as well as difficulty setting up video interpreting services. These cases highlight the idea that telehealth can be incredibly beneficial, when used correctly. For some, the option to attend appointments virtually gives them access to specialists that otherwise may not be available. For other patients, aspects such as access to smart devices and steady internet access must be considered to ensure a successful connection. The hope is that this article sheds light on some of the potential setbacks that can come from the use of telehealth appointments in a practice and provides discussion regarding for whom telehealth may be appropriate, even in pediatric patients. After reading this article, readers should be able to discuss ways in which there could be solutions for these barriers that may prevent some patients from utilizing these types of virtual appointments.

Translation policy

2021 ◽  
Vol 7 (3) ◽  
pp. 339-369
Author(s):  
Alireza Jazini
Keyword(s):  
End Users ◽  
Reception Theory ◽  
Audience Reception ◽  
Policy Network ◽  
Top Down ◽  
Bottom Up ◽  
Policy Model ◽  
Subsequent Research ◽  
Made In

Abstract The translation policy model by González Núñez (2013, 475) comprises three elements, namely “translation management”, “translation practices”, and “translation beliefs”. While the first two elements of this model are straightforward and easy to study in top-down approaches, translation beliefs can relate both to policymakers and policy receivers. However, the distinction has not been clearly made in this model and the element of translation beliefs has been chiefly treated in the literature as though it comes from the top levels of policymaking, hence overlooking the bottom-up aspects of it (see González Núñez 2014, 2016; Li et al. 2017). In order to improve this model, the present paper draws on the audience reception theory (Hall 1973), and shows that the current translation policy model requires a fourth element that I would call ‘translation reception’. The paper draws on the findings of a reception-oriented case study on translation policies in provincial broadcasting in Iran. This study argues that a more inclusive model of translation policy should not only include the authority-level elements of translation management, translation practices, and translation beliefs, but also the element of translation reception on the part of policy receivers. This way, I hope, the end users’ involvement in and contribution to the translation policy network will not be overlooked in subsequent research.

Natural gas treatment by membrane-case study of liquefied natural gas plant of Arzew-Algeria

2021 ◽  
Vol 28 (1) ◽  
pp. 52
Author(s):  
Omar Belhamiti ◽  
Maghnia Hamou Maamar ◽  
Amina Mezouagh ◽  
Belkacem Absar
Keyword(s):  
Natural Gas ◽  
Liquefied Natural Gas ◽  
Gas Treatment
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