Waste management schemes of potash mines in Saskatchewan

1990 ◽  
Vol 17 (4) ◽  
pp. 528-542 ◽  
Author(s):  
J. E. Tallin ◽  
D. E. Pufahl ◽  
S. L. Barbour
Keyword(s):  
Waste Management ◽  
Waste Disposal ◽  
Ground Surface ◽  
Regulatory Agencies ◽  
Hydrological Models ◽  
The Past ◽  
Management Schemes ◽  
Seepage Barriers ◽  
Selection Of

Saskatchewan's potash industry, when operating at capacity, produces 28 × 106 t of salt tailings and 11 × 106 m3 of concentrated brine per year. As a result, in excess of 250 × 106 t of tailings and lesser amounts of brine are stored on the ground surface in waste disposal basins consisting of a system of ponds and dykes. While the substantial quantities of solid waste represent an enormous task for eventual decommissioning, it is the seepage of brine into the surrounding soil and groundwater that is presently of most concern. Four general models are proposed to illustrate the role of hydrogeology in the selection of techniques for containment of potash wastes. This paper reviews waste management schemes in the Saskatchewan potash industry over the past 27 years and presents observations and qualitative evaluations of waste disposal practice of four mines that are representative of the proposed hydrological models. The four case histories identify problems that are common to all mines. The importance of design, operation, and proper monitoring programs is emphasized. The study found that a combination of different seepage barriers have been reasonably successful in preventing serious brine contamination. Shortcomings, where they exist, have been caused largely by unsatisfactory design and construction practices. These inadequacies are of concern to the industry and government regulatory agencies, but they have not yet seriously impeded orderly potash waste disposal. Key words: waste management, potash tailings, brine disposal, brine containment, seepage barriers, seepage control, refining practices, brine ponds.

scholarly journals Indestructible Pasts and Paranoid Presents: John Franzen against Active Forgetting in Purity

2019 ◽  
pp. 21-34
Author(s):  
Cristina Garrigós
Keyword(s):  
Traumatic Event ◽  
The Novel ◽  
Contemporary Society ◽  
The Public ◽  
The Past ◽  
Personal Archives ◽  
Conscious Process ◽  
Unconscious Desire ◽  
Selection Of

Forgetting and remembering are as inevitably linked as lifeand death. Sometimes, forgetting is motivated by a biological disorder, brain damage, or it is the product of an unconscious desire derived from a traumatic event (psychological repression). But in some cases, we can motivate forgetting consciously (thought suppression). It is through the conscious repression of memories that we can find self-preservation and move forward, although this means that we create a fable of our lives, as Nietzsche says in his essay “On the Uses and Disadvantages of History for Life” (1997). In Jonathan Franzen’s novel, Purity (2015), forgetting is an active and conscious process by which the characters choose to forget certain episodes of their lives to be able to construct new identities. The erased memories include murder, economical privileges derived from illegal or unethical commercial processes, or dark sexual episodes. The obsession with forgetting the past links the lives of the main characters, and structures the narrative of the novel. The motivated erasure of memories becomes, thus, a way that the characters have to survive and face the present according to a (fake) narrative that they have constructed. But is motivated forgetting possible? Can one completely suppress facts in an active way? This paper analyses the role of forgetting in Franzen’s novel in relation to the need in our contemporary society to deny, hide, or erase uncomfortable data from our historical or personal archives; the need to make disappear stories which we do not want to accept, recognize, and much less make known to the public. This is related to how we manage information in the age of technology, the “selection” of what is to be the official story, and how we rewrite our own history

Fifty years ago: ‘The scope of occupational medicine in a university health service’

2020 ◽  
pp. 202-203
Author(s):  
Anthony Ryle
Keyword(s):  
Health Service ◽  
Physical Health ◽  
Occupational Medicine ◽  
Potential Role ◽  
Health And Safety ◽  
Academic Achievements ◽  
The Past ◽  
Selection Of

This series provides a selection of articles from the past. In Fifty years ago: The scope of occupational medicine in a university health service Anthony Ryle briefly explores the potential role of a University Health Service in relation to students’ academic achievements and failures, rather than their physical health and safety.

scholarly journals CHANGE IN MAMAK ROLE IN MULO CUCU AYAE CEREMONY IN MATRILINEAL COMMUNITY ENVIRONMENT IN SUNGAI LIUK VILLAGE PERSISIR BUKIT COUNTY, SUNGAI PENUH KERINCI CITY.

2019 ◽  
Author(s):  
Firman - Firman
Keyword(s):  
Economic Factor ◽  
Community Environment ◽  
The Past ◽  
The Family ◽  
Selection Of

In the past until the 1990s in Sungai Liuk mamak had the obligation to carry out a ceremony when the niece of the first daughter of her sister married, named mulo cucu ayae ceremony. But nowadays that role of mamak in the implementation of mulo cucu ayae ceremony has undergone a change. The approach used in this research is a qualitative. The selection of inforants were done by porposive sampling, and thedata were analyzed by the techniques of Milen and Hubermes. Theresults indicate that the role of mamak in the mulo cucu ayae ceremony has undergone a change of role. The role is replaced by father of orang sumando. The role of mamak in mulo cucu ayae ceremony in the past until the 90s (1) Responsible for carrying out mulo cucu ayae ceremony; (2) Coordinating fundraising for mulo cucu ayae ceremony; (3) Preparing equipment for the implementation mulo cucu ayae ceremony, now there is a change in the role of mamak in the implementation mulo cucu ayae ceremony in Dusun Sungai Liuk, such as (1) Educational factor; (2) Economic factor; (3) Factor of heirloom that have been sold; (4) Overseas factors; the occurrence of the change in the role of the mamak during the mulo cucu ayae ceremony in Sungai Liuk; (1) The figure of mamak is less respected by nephews; (2) The authority of mamak begins to fade in the midst of society and sumando (3) Changes in structure and responnsibilities in the family; (4) Conflicts faced; (5) Conflict of inheritance

scholarly journals La construction de la mémoire coloniale en Érythrée: les Erythréens, les Métis, les Italiens. — The construction of memory in colonial Eritrea: Eritreans, Mestizos and Italians

2006 ◽  
Vol 34 (2) ◽  
pp. 493-507
Author(s):  
Gabriella D’Agostino
Keyword(s):  
Life Histories ◽  
Subjective Experience ◽  
Social Position ◽  
Social Selection ◽  
Colonial Discourse ◽  
The Past ◽  
The Social ◽  
Selection Of ◽  
Narrative Role

The construction of memory in colonial Eritrea: Eritreans, Mestizos and Italians. Focusing on some passages of life histories collected in Asmara and based on the ‘memory of Italy’, I study the representation of the past in order to reveal the shaping of the subjective experience by the colonial discourse in Eritrea. If the main aim of my essay is the understanding of the play of interactions between individuals and collectivity, one more important element I take into account is ‘memory’ seen as a “social selection of remembering” (Halbwachs). I try to connect the social position and narrative role of single members (of the Eritrean society) to the meaning it takes the ‘going back to the past’ for them as individuals belonging to a group (an Eritrean, a Mestizo, an Italian) in relation to the past and the present. The consequence is that the logic dominant/dominated is inadequate to explain the internal articulations of the colonial context and that the focus must be shifted on individual and collective systems of expectations and on the negotiations of meaning resulting from a “past always to be recovered” and a “present always to be rebuilt”.

scholarly journals MACRO PHOTOGRAMMETRY IN INVENTORY OF HISTORICAL ENGRAVINGS AT THE ROYAL CASTLE IN WARSAW

2019 ◽  
Vol XLII-2/W9 ◽  
pp. 795-800
Author(s):  
D. Zawieska ◽  
J. Markiewicz ◽  
M. Łuba
Keyword(s):  
Past History ◽  
The Past ◽  
Orientation Process ◽  
Measuring Techniques ◽  
Historical Objects ◽  
Key Aspects ◽  
The Impact ◽  
Selection Of

<p><strong>Abstract.</strong> In the community historical objects play the role of witnesses of the past history. This creates an obligation to preserve and reconstruct them for future generations. Photogrammetric methods have been applied for those purposes for many years. In the process of development of inventory documentation, the key aspects related to the selection of appropriate measuring methods for particular objects and the creation of appropriate working conditions. At present, digital measuring techniques allow developing 3D photogrammetric documentation which is particularly valuable both, for conservators of historical objects, as well as for creating virtual museums. Particular attention should be paid to the utilisation of macro photography for that purpose which allows for recreating small fragments of historical details. The objective of this paper is to present possible use of macro photography for inventory of historical patterns engraved in brick walls of one of the cellars of the Royal Castle in Warsaw (Poland); they are called engravings or house marks. The cellar walls were made of bricks (20<span class="thinspace"></span>&amp;times;<span class="thinspace"></span>10<span class="thinspace"></span>cm) on the stone foundations, where a prison was located in the 17th century. Prisoners left their drawings of signs and crests. Bricks are destroyed, some of them are moss-grown, so many engravings are hardly visible and their depths vary between 3 and 5<span class="thinspace"></span>mm. The Canon 5D Mark II camera with the 50 mm macro lens was used to inventory engravings together with the shadow-free flash, mounted on the lens and a special frame with bolts, being the photogrammetric control network. To ensure the high quality of the 3D model, a network of photographs were acquired from two different distances; they were processed with the use of SfM/MVS algorithms implemented in Agisoft PhotoScan software. The aim of this paper is to discusses the impact of selection of control points on the accuracy of the orientation process, the impact of the point cloud density on correct projection of the digital surface, the influence of the DSM resolution on details of projection of shapes and selection of orthorectification and mosaicking parameters on the accuracy of orthoimage generation.</p>

scholarly journals Retrieval, reuse, revision and retention in case-based reasoning

2005 ◽  
Vol 20 (3) ◽  
pp. 215-240 ◽  
Author(s):  
RAMON LOPEZ DE MANTARAS ◽  
DAVID MCSHERRY ◽  
DEREK BRIDGE ◽  
DAVID LEAKE ◽  
BARRY SMYTH ◽  
...  
Keyword(s):  
Problem Solving ◽  
Analogical Reasoning ◽  
Case Based Reasoning ◽  
The Past ◽  
Future Problem ◽  
Considerable Success ◽  
Representative Selection ◽  
Case Based ◽  
Selection Of

Case-based reasoning (CBR) is an approach to problem solving that emphasizes the role of prior experience during future problem solving (i.e., new problems are solved by reusing and if necessary adapting the solutions to similar problems that were solved in the past). It has enjoyed considerable success in a wide variety of problem solving tasks and domains. Following a brief overview of the traditional problem-solving cycle in CBR, we examine the cognitive science foundations of CBR and its relationship to analogical reasoning. We then review a representative selection of CBR research in the past few decades on aspects of retrieval, reuse, revision and retention.

Mitomycin: ten years after approval for marketing.

1985 ◽  
Vol 3 (2) ◽  
pp. 276-286 ◽  
Author(s):  
D C Doll ◽  
R B Weiss ◽  
B F Issell
Keyword(s):  
Renal Failure ◽  
Single Agent ◽  
Chemotherapeutic Agents ◽  
Microangiopathic Hemolytic Anemia ◽  
Fibrosing Alveolitis ◽  
The Past ◽  
Superficial Bladder Carcinoma ◽  
Drug Regimens ◽  
Selection Of

Mitomycin was approved for marketing by the Food and Drug Administration in 1974 for use in gastric and pancreatic carcinomas when combined with other chemotherapeutic agents. Since then, mitomycin has been used extensively in combination chemotherapy for a variety of tumors, particularly in the past seven years. However, the contribution of this agent to the various drug regimens has not been adequately defined. Clear evidence of the drug's activity as a single agent has been seen in the intravesical treatment of superficial bladder carcinoma. Common toxicities include anorexia, vomiting, and myelosuppression. Less common, but potentially lethal, toxicities in the form of fibrosing alveolitis and microangiopathic hemolytic anemia with renal failure are being reported with increasing frequency. These potentially severe adverse effects, coupled with the still undefined role of mitomycin in systemic cancer chemotherapy, suggest that selection of this drug for other than investigational use should be made with care.

The role of sex in cardiac function and diseaseThis paper is one of a selection of papers published in this Special Issue, entitled Young Investigator's Forum.

2006 ◽  
Vol 84 (1) ◽  
pp. 93-109 ◽  
Author(s):  
Michael P. Czubryt ◽  
Leon Espira ◽  
Lise Lamoureux ◽  
Bernard Abrenica
Keyword(s):  
Disease Susceptibility ◽  
Heart Function ◽  
Cardiac Diseases ◽  
Special Issue ◽  
Isolated Cardiomyocytes ◽  
The Past ◽  
Health And Disease ◽  
Shed Light ◽  
Selection Of

In the past decade, increasing attention has been paid to the importance of sex in the etiology of cardiac dysfunction. While focus has been primarily on how sex modulates atherogenesis, it is becoming clear that sex is both a predictor of outcome and an independent risk factor for a number of other cardiac diseases. Animal models and human studies have begun to shed light on the mechanisms by which sex influences the function of cardiomyocytes in health and disease. This review will survey the current literature on cardiac diseases that are influenced by sex and discuss the intracellular mechanisms by which steroid sex hormones affect heart function. A theory on how sex may regulate myocardial energy metabolism to affect disease susceptibility and progression will be presented, as well as a discussion of how sex may influence outcomes of experiments on isolated cardiomyocytes by epigenetic marking.

scholarly journals Charting New Venues for Teaching Literary Texts through Black English Vernacular in EFL Context: Case of H.B. Stowe’s Uncle Tom’s Cabin

2021 ◽  
Author(s):  
Yamina ILES ◽  
Amine BELMEKKI
Keyword(s):  
Analytical Method ◽  
Black English ◽  
Literary Texts ◽  
Cultural Elements ◽  
American Novel ◽  
Uncle Tom's Cabin ◽  
Efl Context ◽  
The Past ◽  
Selection Of

This research paper attempts at studying the operation of literary texts teaching through Black English Vernacular (BEV) in EFL context, selecting the American novel: Uncle Tom’s Cabin, henceforth (UTC), (1852) by Harriet Beecher Stowe (1811-1896) as a parameter of research. Its main aim is to reveal and project the new venues for teaching literary texts through BEV in EFL classroom. The choice of this novel constitutes a luxuriant source of investigation. Additionally, it is abundant with various cultural elements used by its characters. The significance of the study relies on the examination and analysis of lexical items regarding the role of literature in the EFL context between the past and the present time. Also, with the difficulties of using literary texts as language tools in the EFL educational milieu. After implementing a stylistic analytical method on the selected novel, the results of the study end up by the selection of certain lexical entries from Black English that can be used as a reference in the teaching of literature in EFL contexts.

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