Effect of flow pattern at pipe bends on corrosion behaviour of low carbon steek and its challenges

Recent design work regarding seawater flow lines has emphasized the need to identify, develop, and verify critical relationships between corrosion prediction and flow regime mechanisms at pipe bend. In practice this often reduces to an pragmatic interpretation of the effects of corrosion mechanisms at pipe bends. Most importantly the identification of positions or sites, within the internal surface contact areas where the maximum corrosion stimulus may be expected to occur, thereby allowing better understanding, mitigation, monitoring and corrosion control over the life cycle. Some case histories have been reviewed in this context, and the interaction between corrosion mechanisms and flow patterns closely determined, and in some cases correlated. Since the actual relationships are complex, it was determined that a risk based decision making process using selected ‘what’ if corrosion analyses linked to ‘what if’ flow assurance analyses was the best way forward. Using this in methodology, and pertinent field data exchange, it is postulated that significant improvements in corrosion prediction can be made. This paper outlines the approach used and shows how related corrosion modelling software data such as that available from corrosion models Norsok M5006, and Cassandra to parallel computational flow modelling in a targeted manner can generate very noteworthy results, and considerably more viable trends for corrosion control guidance. It is postulated that the normally associated lack of agreement between corrosion modelling and field experience, is more likely due to inadequate consideration of corrosion stimulating flow regime data, rather than limitations of the corrosion modelling. Applications of flow visualization studies as well as computations with the k-ε model of turbulence have identified flow features and regions where metal loss is a maximu

A Comparative Effectiveness Study of the Trauma Recovery Empowerment Model (TREM) and an Attachment-Informed Variation of TREM

Abstract A Comparative Effectiveness Study of the Trauma Recovery Empowerment Model (TREM) and an Attachment-Informed Variation of TREM (ATREM) Melanie Masin-Moyer, University of Pennsylvania Dr. Phyllis Solomon, Dissertation Chair, University of Pennsylvania Dr. Malitta Engstrom, Dissertation Committee Member, University of Pennsylvania Objective: An evidenced-based women’s trauma group was modified to create a new protocol, Attachment-Informed Trauma Recovery Empowerment Model (ATREM), which included attachment-based concepts and strategies to determine if well-being could be enhanced beyond the Trauma Recovery Empowerment Model (TREM). A quasi-experimental design was used to test the hypothesis that ATREM would be associated with greater improvement in attachment security, perceived social support, emotion regulation, substance use, depression, anxiety, and PTSD symptoms than TREM. Methods: Sixty-nine women completed the group interventions (n = 37 ATREM; n = 32 TREM), along with pre- and-post-test questionnaires. The questionnaires included sociodemographic questions and the following standardized scales: Relationship Scale Questionnaire, Social Group Attachment Scale, Social Support Scale, Difficulties in Emotional Regulation, Brief Symptom Inventory 18, PTSD Symptom Scale, and modified versions of the Lifetime Stressor Checklist Revised and the Addiction Severity Index. The continuous variables were analyzed using paired t-tests for within-group comparisons and independent t-tests for between-group comparisons, and the categorical variables were analyzed using Chi-Square or Fisher’s Exact Test. Results: Both ATREM and TREM were associated with statistically significant within-group improvement in individual and group attachment styles, perceived social support, emotion regulation capacities, depression, anxiety, and PTSD. Only ATREM was associated with statistically significant improvement in individual attachment avoidance. The gains associated with ATREM did not exceed those associated with TREM as hypothesized. Conclusion: This pilot study extends prior findings on TREM by demonstrating that novel infusions of attachment-focused strategies into this evidence-based practice can facilitate comparable growth across a variety of measures of well-being. ATREM was also able to promote significant reductions in individual attachment avoidance, a style of interacting often considered challenging to modify. ATREM’s integrated design with cognitive-behavioral and psychodynamic elements holds potential to enhance responsiveness and effectiveness of TREM in meeting the diverse needs of women who have experienced trauma. Further, this study demonstrates the effectiveness of brief trauma-focused group therapy and provides insight into the emerging concept of group attachment style

Effects of fluid flow on corrosion behaviour in pipe bends

Correlation on flow induced corrosion (FIC) for straight pipes and bends have been obtained by researchers via a two-dimensional numerical method and experimental techniques. However, for pipe bends, the correlations require further improvements as the flow in bends are more complicated. The objective of this research is to obtain more accurate correlations for FIC in bends using twodimensional and three-dimensional numerical and experimental techniques. In the numerical and experimental approach, several important parameters such as Reynolds number and selected discrete particle model (DPM) were used to obtain erosion rate for miter and smooth bend models. Validations for the modellings were compared with experimental results and locations of the eroded sections were observed to be in agreement. Then, the erosion rates were extracted and analyzed using shooting method. Finally, the new coefficients for the correlations were obtained. When the new equations were applied to the same two-dimensional models, it was shown that the previous two-dimensional models had over-predicted the mass transfer values. Furthermore, when comparisons were made between smooth and miter bends results under the same flow conditions, it was observed that mass transfer values calculated from miter bend models were much higher than that of smooth bends. Experimental results also showed similar behavior, when the surface morphology was examined under Field Emission Scanning Electron Microscope (FESEM). From numerical and experimental approach conducted, it is concluded that the inner diameter bends were the areas with the highest FIC behaviour for 300 and 450 smooth and mitre bends

Music as an Expression of Traumatic Pasts and Conflicting Futures

Chad Abushanab’s “On the Dred Ranch Road Just off 283” and Emily Dickinson’s “Better—Than Music!” use their poetic forms to express the idea of music as being representative of each of their speakers’ spectrum of experiences and troubles. Despite the two poems being separated by hundreds of years and completely different life experiences, both speakers use the premise of music to establish their troubled pasts. The two poems begin to diverge when they also use music as a means of conveying their expectations for the future. Abushanab’s speaker laments his father’s alcoholism and the speaker has convinced himself the he will suffer the same dismal fate of his father. The music he expresses is dark and shows overwhelmed and depressed view of his fears. Dickinson’s speaker, on the other hand, knows how disheartening her past has been (although she never reveals specifically what has happened), but looks forward to the future as hears beautiful music as a sound of hope of what is to come. Both speakers have reason to fear their respective futures but take conflicting approaches as how to reconcile those fears. Music is able to express an extreme range of emotions where words often fall short and each poet employs the language of music to convey their acute fear, despair, joy, and hope that their speakers feel at this point of conflict in their lives. Abushanab and Dickinson are able to employ both form and content to express the vivid musicality of abstract emotions. Although each speaker ends in a different place in their respective emotional journeys, they use similar modes of communication to work through their traumatic pasts to create conflicting visions of their potential futures

The Battle for Love Under the Governance of Strict Social Codes

Geoffrey Chaucer’s “The Knight’s Tale” presents a grand, romantic, and heroic story between Palamon and Emily, who pray to Roman deities that represent the values and qualities that were important to men and women of that time. Conversely, “The Rape of the Lock” by Alexander Pope is a mockery of this heroic style and tells a satirical tale of Belinda and Baron, each of whom pray to the powers of mystical creatures and trinkets, which are tangible manifestations of the rules that govern a gendered social order. Although Pope’s story is a satire of tales such as Chaucer’s, both comment upon the lack of control people have within the confines of gender norms and the social rules that dictate one’s life. Specifically, Palamon and Baron prove that male desire and social expectations supersede the virtues of women such as Emily and Belinda. Through differences in genre, time, and geography, “The Knight’s Tale” and “The Rape of the Lock” both comment upon the transcendent themes of individual autonomy within strict and binding social norms

White Dominion as Control: On Scientific Management and Racial Capitalism

This essay deepens the analysis of whiteness-as-dominion recently advanced by political theorist Ella Myers. Drawing on W.E.B. Du Bois, Myers focuses on the role that ideas of ownership and possession play in white racial identity. While I am persuaded that ownership and whiteness are cojoined, ownership does not necessarily imply control, although the former may be a prerequisite for the latter. I therefore argue that the idea of white dominion can be enhanced by paying greater attention to practices of racial control. More specifically, I focus on racialized modes of labor control via scientific management, or what recent scholars describe as “whiteness-as-management.” Understanding racial capitalism through the lens of control helps us see the tactics that are used to create and maintain racial identity and dominion

Estimating soil degradation in montane grasslands of North-eastern Italian Alps (Italy)

Grasslands cover a large portion of the terrestrial ecosystems, and are vital for biodiversity conservation, environmental protection and livestock husbandry. However, grasslands are degraded due to unreasonable management worldwide, i.e., soil erosion indirectly due to the damage of overgrazing on vegetation coverage and soil texture. An in-depth investigation is necessary to quantify soil erosion in alpine pastures, in order to manage grasslands more sustainably. In this work, we collected freely available satellite images and carried out intensive field surveys for the whole Autonomous Province of Trento (Northeastern Italian Alps) in 2016. The area (and volume) of soil erosions were then estimated and shown in maps. The average of the depths of soil erosion measured in field was used as a reference for estimating soil erosion of the entire study area. High-resolution DEMs difference in soil surface conditions was also computed in two representative areas between pre- and post-degradation to estimate the volume and the average depth of eroded soils. The degradation of soil in the study areas has been estimated in 144063 m2 and an estimated volume of 33610 ± 1800 m3. Results indicate that our procedure can serve as a low-cost approach for a rapid estimation of soil erosion in mountain areas. Mapping soil erosion can improve the sustainability of grazing management system and reduce the risk of pastureland degradation at large spatial scales

Pressure measurement by Piezo-electric transducers in reciprocating combustion engines

The properties, use and construction of quartz Piezo electric transducers are briefly described. The dynamic calibration of quartz pressure transducers have been investigated using a Balanced-Disc pressure pick-up as a standard. The temperature effect on the static and dynamic output of these transducers has also been examined. Various types of engine indicators and their limitations are discussed. Piezo-electric pressure transducers and strain gauges were used for constructing an inertia-free pressure-volume indicator to produce a P-V diagram on an oscilloscope screen from which the trace was recorded. This included a simple and accurate method for obtaining top-dead-centre on pressure-time records. Some aspects of diesel combustion were considered using P-T diagrams from a variable compression Lister F.R.I diesel engine running at different loads and compression ratios. The effect of the shape of transducer passage on the accuracy of P-T diagrams is observed. Volumetric efficiency was measured using a crystal pressure transducer. The assumptions of this method was checked by comparison with the volumetric efficiency obtained by. two other established methods

18th Century Theater and the Legitimacy of the Lower Classes

18th century theater developed alongside the expanding role of the lower and middle classes. George Lillo’s working-class tragedy The London Merchant and John Gay’s comedic satire The Beggar’s Opera exemplify how both drama and comedy can bring awareness and legitimacy to the struggles of working-class people. The London Merchant uses cultural references and religious language to elevate the struggles of its titular merchant’s apprentice whereas The Beggar’s Opera uses language of honor and nobility to draw parallels between the criminal underground and high society, both in service of using the medium of theater to acknowledge the middle and lower classes’ power