scholarly journals Polymetamorphic evolution of pelites inferred from tourmaline zoning – the Rędziny hornfels case study at the eastern contact of the Karkonosze Granite, Sudetes, Poland

Mineralogia ◽  
2018 ◽  
Vol 49 (1-4) ◽  
pp. 17-34 ◽  
Author(s):  
Jarosław Majka ◽  
Mateusz P. Sęk ◽  
Stanisław Mazur ◽  
Bożena Gołębiowska ◽  
Adam Pieczka
Keyword(s):  
Contact Metamorphism ◽  
Metamorphic Event ◽  
Prograde Metamorphism ◽  
Intermediate Pressure ◽  
Temperature Conditions ◽  
Two Stages ◽  
Ti Content ◽  
Western Sudetes

AbstractTourmaline occurring in hornfelses from the eastern envelope of the Karkonosze Granite (Western Sudetes, Poland) reveals at least two stages of crystallization expressed by its complex zoning. The cores and mantles of the crystals probably grew during prograde metamorphism under intermediate pressure-temperature conditions reflected by increasing Mg, Ti and Ca. Outermost rims show enrichment in Al and Ca, indicating growth during contact metamorphism in the presence of an Al-saturating phase. The Ti-content in biotite indicates that the temperature of the contact metamorphic event did not exceed 650ºC. The presence of andalusite and the lack of garnet and cordierite also indicates pressure conditions of ~ 2-3 kbar, typical of the C1 bathozone of Carmichael (1978) or the P1 bathozone of Pattison (2001).

The Implementation of Biological Phosphorus and Nitrogen Removal with the Bio-Denipho Process on a 265,000 PE Treatment Plant

1992 ◽  
Vol 25 (4-5) ◽  
pp. 161-168 ◽  
Author(s):  
J. Einfeldt
Keyword(s):  
Nitrogen Removal ◽  
Treatment Plant ◽  
First Year ◽  
In Series ◽  
Design Loads ◽  
Last Stage ◽  
Two Stages ◽  
The City ◽  
Biological Phosphorus

A process, called Bio-Denipho, for combined biological phosphorus and nitrogen removal in a combination of an anaerobic tank and two oxidation ditches is described. In this process the anaerobic tank consisting of three sections working in series is followed by two oxidation ditches. These too are working in series, but with both inlet to and outlet from the tanks changing in a cycle. The Bio-Denipho process is described specifically for the process itself and as a case study for the implementation of the process on a 265,000 pe wastewater treatment plant for the city of Aalborg in Denmark. The plant was designed and erected in two stages and the last stage was inaugurated October 31,1989. Lay-out and functions for the plant is described and design loads, plan lay-out and tank volumes are given in this paper together with performance data for the first year in operation.

Field Performance and Analysis of 3-m-Diameter Induced Trench Culvert under a 19.4-m Soil Cover

2008 ◽  
Vol 2045 (1) ◽  
pp. 68-76 ◽  
Author(s):  
Bethanie A. Parker ◽  
Rodney P. McAffee ◽  
Arun J. Valsangkar
Keyword(s):  
Pressure Distribution ◽  
Earth Pressure ◽  
Field Performance ◽  
Overburden Pressure ◽  
Vertical Pressure ◽  
Earth Pressures ◽  
Design Loads ◽  
Horizontal Pressure ◽  
Two Stages

An induced trench installation was instrumented to monitor earth pressures and settlements during construction. Some of the unique features of this case study are as follows: (a) both contact and earth pressure cells were used; (b) part of the culvert is under a new embankment and part was installed in a wide trench within an existing embankment; (c) a large stockpile was temporarily placed over the induced trench; and (d) the compressible material was placed in two stages. The maximum vertical pressure measured in the field at the crown of the culvert was 0.24 times the overburden pressure. The maximum horizontal pressure measured on the side of the culvert at the springline was 0.45 times the overburden pressure. The column of soil directly above the compressible zone settled approximately 40% more than did the adjacent fill. The field results at the crown and springline compared reasonably with those observed with numerical modeling. However, the overall pressure distribution on the pipe was expected to be nonuniform, the average vertical pressure calculated by using numerical analysis on top of the culvert over its full width was 0.61 times the overburden pressure, and the average horizontal pressure calculated on the side of the culvert over its full height was 0.44 times the overburden pressure. When the full pressure distribution on the pipe is considered, the recommended design loads from the Marston–Spangler theory slightly underpredict the maximum loads, and the vertical loads control the design.

RE-engineered factory acceptance testing under the new normal

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sanduni Peiris ◽  
Nayanthara De Silva
Keyword(s):  
Construction Industry ◽  
Geographical Area ◽  
Test Reliability ◽  
Acceptance Testing ◽  
Sri Lankan ◽  
Content Type ◽  
Future Studies ◽  
Physical Touch ◽  
Two Stages

Purpose Factory acceptance testing (FAT) in the construction industry has been severely hampered due to restrictions in cross-border travel resulting from the COVID-19 pandemic. Consequently, virtual FAT (vFAT) became a popular substitute for physical FAT. However, the credibility of vFAT is being questioned because it was adopted without much scrutiny. Hence, this study is aimed at investigating vFATs and re-engineering the FAT process to suit an effective vFAT environment.Design/methodology/approach A comprehensive literature search on FAT procedures was followed by two stages of expert interviews with eight leading subject experts and a case study. The findings were analysed using code-based content analysis on NVivo software.Findings Strengths of vFATs include “reduction in cost and time consumed”, “flexibility for more participants” and “faster orders”. Most emphasized weaknesses include “lack of reliability” and “lack of technology transfer”. vFAT has mostly increased test reliability by “improving accessibility” and has decreased reliability by “restricting physical touch and feel observation of the equipment”. A four-step vFAT process was developed with a noteworthy additional step called “Pre-FAT Meeting”.Research limitations/implications The scope of this study is limited to the Sri Lankan construction industry. Expansion of the geographical area of focus is recommended for future studies.Originality/value The findings of this study unveil a vFAT process, which is timely and beneficial for construction practitioners to optimize and enhance the effectiveness of vFATs which are currently conducted in a disarranged manner.

Assessing the Performance of a SAR Boat Location-Allocation Plan via Simulation

2019 ◽  
pp. 67-97
Author(s):  
Mumtaz Karatas ◽  
Nasuh Razi ◽  
Hakan Tozan
Keyword(s):  
Optimal Allocation ◽  
Aegean Sea ◽  
Allocation Scheme ◽  
Loss Of Life ◽  
Location Allocation ◽  
Maritime Search And Rescue ◽  
Two Stages ◽  
Critical Process ◽  
Level Process

Maritime search and rescue (SAR) operation is a critical process that aims to minimize the loss of life, injury, and material damage by rendering aid to persons in distress or imminent danger at sea. Optimal allocation of SAR vessels is a strategic level process that is to be carried out with a plan to react rapidly. This chapter seeks to evaluate the performance of a SAR boat location plan using simulation. The proposed methodology in this chapter works in two stages: First, an optimal allocation scheme of SAR resources is determined via a multi-objective mathematical model. Next, simulation is used to test the performance of the analytical solution under stochastic demand. With the heaviest traffic and maritime risk, the methodology is applied to a case study in the Aegean Sea.

Improving ESP Performance with Two Stages of Gas Separation in 7 Casing Case Study

2020 ◽  
Author(s):  
Anderson Delgado ◽  
Jorge Espinosa ◽  
Maria Hernandez ◽  
Luis Guanacas ◽  
Gustavo Gonzalez ◽  
...  
Keyword(s):  
Gas Separation ◽  
Two Stages

scholarly journals Design and Operation of a Modern Polish Plant for Plastic Waste Recycling through the Degradative Depolymerization Process. A Case Study

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6620 ◽  
Author(s):  
Andrzej Duda ◽  
Arkadiusz Fenicki ◽  
Patryk Molski ◽  
Elżbieta Szostak ◽  
Piotr Duda
Keyword(s):  
Negative Pressure ◽  
Waste Recycling ◽  
Considerable Reduction ◽  
Industrial Scale ◽  
Process Safety ◽  
Innovative Solutions ◽  
Plastic Waste Recycling ◽  
High Level ◽  
Two Stages

The paper describes an installation for the degradative depolymerization of polyolefin materials obtained from wastes, hereinafter also referred to as depolymerization for simplicity. The plant, on an industrial scale, is one of the few operating in Poland. However, it is one of the most modern plants in this industry. Design solutions, construction of particular technological lines, compliance with national and EU regulations and the high level of process safety were described in this paper as well as compared to other plants of this type in Poland. Different solutions were presented in drawings and photos of the plant and in fragmentary technological diagrams. The types of waste and the methods of their processing by the plant were also characterized in accordance with the applicable regulations. The waste throughput is from 2000 to 4000 kg/h, while the efficiency of the depolymerization installation itself is 1500 kg/h. The industrial-scale depolymerization process is carried out in one or two stages: by homogenization (extraction) at a temperature up to 200 °C and depolymerization at temperatures up to 400 °C. The obtained products (energy goods) are sold for further processing. The processes, devices and methods are characterized by novel, innovative solutions, covered by a number of patents, which are also described below. The advantage of the presented technology is the substantial simplification of the process and thereby a considerable reduction in investment costs. Among others, the processes of distillation and rectification (low- and negative-pressure) were abandoned.

Photography and the Perils of Automaticity: P. H. Emerson, Copyright, and the Agency of the Artist

2020 ◽  
Author(s):  
JiHae Koo
Keyword(s):  
Copyright Law ◽  
Aesthetic Theory ◽  
Medium Specificity ◽  
Cultural Imaginary ◽  
Before And After ◽  
Artistic Medium ◽  
The Aesthetic ◽  
Two Stages ◽  
The Relationship

Abstract The photographer Peter Henry Emerson (1856–1936) is known today for the splash he made on the Victorian photographic scene in the 1880s with his bold refusal to follow his fellow art photographers (collectively known as the Pictorialists) in latching the new medium on to the aesthetic conventions of painting. His conventional position within art history is thus as a precursor to the Modernist conception of photography’s medium-specificity. Yet even if Emerson’s work was ahead of its time in its proto-Modernist refusal of painterly conventions, it also has qualities that place it more squarely within late-Victorian discourses. In particular, I argue, Emerson’s ongoing efforts to secure his photographs via copyright law need to be understood as reflective of a distinctly nineteenth-century cultural imaginary. This essay addresses the relationship between Emerson’s aesthetic theory and copyright law by dividing Emerson’s career into two stages, before and after 1891, this being the year in which Emerson abruptly disavowed photography as an artistic medium in his short pamphlet ‘The Death of Naturalistic Photography’. Examining two photography books – Pictures of East Anglian Life (1888) and On English Lagoons (1893) – alongside late-Victorian debates about photographic copyright, I show that Emerson’s earlier belief in photographic copyright’s ability to retain the integrity of an artist’s vision breaks down after 1891. He loses faith in the ‘copyrightability’ of photography in 1891 when he recognizes the mechanical nature – or automaticity – of the camera. That is, Emerson realizes that the photograph is never purely the product of the artist. In sum, this case study shows that by the 1890s, photographic copyright was becoming detached from the notion of creativity and thus could no longer be the guarantee of a photographer’s claim to artistic individuality.

Social entrepreneurship in the informal economy: a case study of re-enactment festivals

2015 ◽  
Vol 9 (1) ◽  
pp. 6-16 ◽  
Author(s):  
Valery Gordin ◽  
Mariya Dedova
Keyword(s):  
Informal Economy ◽  
Russian Market ◽  
Content Type ◽  
Non Profit ◽  
Qualitative Survey ◽  
New Information ◽  
High Level ◽  
Entrepreneurial Activities ◽  
Two Stages

Purpose – The paper aims to generate new information on the types of entrepreneurial activities at the re-enactment festivals and their importance for the re-enactors. Design/methodology/approach – The study consisted of two stages: a content analysis of information available through online open access and a qualitative survey of re-enactors and a qualitative survey of re-enactors was organised and spanned from November 2012 to February 2013. Findings – The paper concludes that a specific form of entrepreneurship in the Russian market characterised by creation of social capital, a high level of devotion to engagement and, at the same time, non-profit-related gains has been emerged. Research limitations/implications – The socio-cultural phenomenon of entrepreneurship within re-enactment festivals is investigated. The study may be further developed by identifying various cultural events that may be characterised by the existence of an internal festival market. Originality/value – This paper highlights social entrepreneurial activities in informal sector by the example of re-enactment festivals.

Can owls be used to monitor the impacts of urbanisation? A cautionary tale of variable detection

2017 ◽  
Vol 44 (7) ◽  
pp. 573 ◽  
Author(s):  
Raylene Cooke ◽  
Hannah Grant ◽  
Isabel Ebsworth ◽  
Anthony R. Rendall ◽  
Bronwyn Isaac ◽  
...  
Keyword(s):  
Landscape Change ◽  
Urban Forest ◽  
Biodiversity Monitoring ◽  
Occupancy Models ◽  
Detection Rates ◽  
Temperature Conditions ◽  
Detection Probabilities ◽  
Barn Owls ◽  
Time Of Year

Context Due to their important ecological roles, predators are increasingly being suggested as targets for biodiversity studies investigating how they respond to landscape change and transformation. But there is limited literature investigating our capacity to accurately monitor changes in their occupancy. Aims To test the efficacy of playback surveys for monitoring owls as a basis for investigating change in owl occupancy over time. We ask whether playback is an effective tool, and whether it can be optimised to improve its utility. Methods Using the urban–forest interface of Melbourne, Australia, as a case study, we used playback techniques to survey for the presence of three owl species: the powerful owl (Ninox strenua); southern boobook (Ninox boobook); and eastern barn owl (Tyto javanica). Sites were repeat surveyed at least 16 times throughout the year and occupancy models were developed to establish how season and temperature influence nightly detection probabilities of owls. Key results All three species of owl were detected through playback survey approaches, but the detection probabilities varied greatly between species and across seasons and temperature conditions. Eastern barn owls are poor candidates for playback surveys due to their low detection probabilities. The southern boobook and powerful owl are responsive to playback, but detection probabilities are influenced by season and/or temperature conditions. To optimise survey approaches, southern boobooks should be surveyed during spring and summer and the powerful owl should be surveyed on nights where the minimum temperature is near 20°C. Conclusions Although there is considerable interest in using predators such as owls to monitor biodiversity impacts associated with landscape change, poor detection rates can limit their utility. However, optimising survey approaches that consider shifting detection probabilities under different conditions such as time of year or temperature may improve the utility of predators as surrogates in biodiversity monitoring. Implications Optimising survey approaches for owls considerably reduces the window of opportunity in which to conduct surveys. To counter this, the intensity of survey effort needs to be increased during key periods. The use of highly trained citizen science teams may be one effective way of delivering such an approach.

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