1,599 research outputs found
William Stringfellow and the Christian Witness Against Death
No full textDiscusses theologian William Stringfellow\u27s views and Christian interpretation of death. Identification of various forms of the power of death; Witnessing against death; Stringfellow\u27s bout with a serious illness which resulted to death; Perception on the threats of death
Control aspects of synchronous machines in power systems applications
No full textDevelopments in control design methods for power systems have continually been made during the last ten years, and the present thesis seeks to make its contribution to this pattern of work. In so doing, it develops electrical machine mathematical models on which the subsequent designs are based. The formulations relate specifically to those from which computer programs may be readily developed and particular importance has been attached to the systematic marshalling of plant and network equations for the subsequent and efficient solution by computer methods. Methods of model reduction and state transformation are described and these are used to manipulate the system models into the form appropriate to the regulator design algorithm. The regulator-design algorithm is described in which a systematic numerical technique is used to predetermine the performance criterionJ = C(xtQx + u )dt. The constraints imposed on the system response by the design specification are associated with the movement of the eigenvalue locations to give actual values for the elements of Q. The algorithm described, for the linear single-input system, is based on the sensitivity of the elements of Q to shifts in the eigenvalue locations to produce a performance criterion for improved system stability. The resulting algorithm is applied to the design of an a.c. turbo generator excitation control and is shown to give a system that has advantages over a controller designed using conventional techniques. The thesis is supported by four published papers in which the author of the present thesis is joint author. One reports on the development of the design algorithm and the others deal with computational aspects of control design and its-application to power systems; computer listings are presented in the papers. In addition, the author's work has been presented at two conferences for which published records exist.</p
A pilot-scale trial comparing mesophilic and thermophilic digestion for the stabilisation of source segregated kitchen waste
No full textSource segregated food waste was collected from domestic properties and its composition determined together with the average weight produced per household, which was 2.91 kg per week. The waste was fed over a trial period lasting 58 weeks to an identical pair of 1.5 m3 anaerobic digesters, one at a mesophilic (36.5 oC) and the other at a thermophilic temperature (56 oC). The digesters were monitored daily for gas production, solids destruction and regularly for digestate characteristics including alkalinity, pH, volatile fatty acid (VFA) and ammonia concentrations. Both digesters showed high VFA and ammonia concentrations but in the mesophilic digester the pH remained stable at around 7.4, buffered by a high alkalinity of 13,000 mg l-1; whereas in the thermophilic digester VFA levels reached 45,000 mg l-1 causing a drop in pH and digester instability. In the mesophilic digester volatile solids (VS) destruction and specific gas yield were favourable, with 67% of the organic solids being converted to biogas at a methane content of 58% giving a biogas yield of 0.63 m3 kg-1 VS added. Digestion under thermophilic conditions showed potentially better VS destruction at 70% VS and a biogas yield of 0.67 m3 kg-1 VS added, but the shifts in alkalinity and the high VFA concentrations required a reduced loading to be applied. The maximum beneficial loading that could be achieved in the mesophilic digester was 4.0 kg VS m-3 d-1
A pilot-scale comparison of mesophilic and thermophilic digestion of source segregated domestic food waste
No full textSource segregated food waste was collected from domestic properties and its composition determined together with the average weight produced per household, which was 2.91 kg per week. The waste was fed over a trial period lasting 58 weeks to an identical pair of 1.5 m3 anaerobic digesters, one at a mesophilic (36.5°C) and the other at a thermophilic temperature (56°C). The digesters were monitored daily for gas production, solids destruction and regularly for digestate characteristics including alkalinity, pH, volatile fatty acid (VFA) and ammonia concentrations. Both digesters showed high VFA and ammonia concentrations but in the mesophilic digester the pH remained stable at around 7.4, buffered by a high alkalinity of 13,000 mg l-1; whereas in the thermophilic digester VFA levels reached 45,000 mg l-1 causing a drop in pH and digester instability. In the mesophilic digester volatile solids (VS) destruction and specific gas yield were favourable, with 67% of the organic solids being converted to biogas at a methane content of 58% giving a biogas yield of 0.63 m3 kg-1 VSadded. Digestion under thermophilic conditions showed potentially better VS destruction at 70% VS and a biogas yield of 0.67 m3 kg-1 VSadded, but the shifts in alkalinity and the high VFA concentrations required a reduced loading to be applied. The maximum beneficial loading that could be achieved in the mesophilic digester was 4.0 kg VS m-3 d-1
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Radiochemical Analyses of the Filter Cake, Granular Activated Carbon, and Treated Ground Water from the DTSC Stringfellow Superfund Site Pretreatment Plant
No full textThe Department of Toxic Substance Control (DTSC) requested that Lawrence Livermore National Laboratory (LLNL) evaluate the treatment process currently employed at the Department's Stringfellow Superfund Site Pretreatment Plant (PTP) site to determine if wastes originating from the site were properly managed with regards to their radioactivity. In order to evaluate the current management strategy, LLNL suggested that DTSC characterize the effluents from the waste treatment system for radionuclide content. A sampling plan was developed; samples were collected and analyzed for radioactive constituents. Following is brief summary of those results and what implications for waste characterization may be made. (1) The sampling and analysis provides strong evidence that the radionuclides present are Naturally Occurring Radioactive Material (NORM). (2) The greatest source of radioactivity in the samples was naturally occurring uranium. The sample results indicate that the uranium concentration in the filter cake is higher than the Granular Activated Carbon (GAC) samples. (11 -14 and 2-6 ppm respectively). (3) No radiologic background for geologic materials has been established for the Stringfellow site, and comprehensive testing of the process stream has not been conducted. Without site-specific testing of geologic materials and waste process streams, it is not possible to conclude if filter cake and spent GAC samples contain radioactivity concentrated above natural background levels, or if radionuclides are being concentrated by the waste treatment process. Recommendation: The regulation of Technologically Enhanced, Naturally Occurring Radioactive Materials (T-NORM) is complex. Since the results of this study do not conclusively demonstrate that natural radioactive materials have not been concentrated by the treatment process it is recommended that the DTSC consult with the Department of Health Services (DHS) Radiological Health Branch to determine if any further action is warranted. If it were deemed desirable to establish a background for the Stringfellow setting LLNL would recommend that additional samples be taken and analyzed by LLNL using the same methods presented in this report
The Vanguard (Vol. 17, No. 2), Mar 1970
No full textWilliam Stringfellow, attorney, and outstanding lay theologian is a longtime friend of LHRAA. He is the author of A Private and Public Faith, My People Is the Enemy, and Count It All Joy. In 1969, Dr. Stringfellow was presented with the Mind of Christ Award by LHRAA
Erratum: Medication Adherence Reminder System for Virtual Home Assistants: Mixed Methods Evaluation Study (Jmir Form Res (2021)5:7 (E27327) Doi: 10.2196/27327)
No full textIn “Medication Adherence Reminder System for Virtual Home Assistants: Mixed Methods Evaluation Study” (JMIR Form Res 2021;5(7):e27327), three errors were noted. Due to a system error, the name of one author, Cynthia F Corbett, was replaced with the name of another author on the paper, Elizabeth M Combs. In the originally published paper, the order of authors was listed as follows: Elizabeth M Combs, Elizabeth M Combs, Peyton S Chandarana, Isabel Stringfellow, Karen Worthy, Thien Nguyen, Pamela J Wright, Jason M O\u27Kane This has been corrected to: Cynthia F Corbett, Elizabeth M Combs, Peyton S Chandarana, Isabel Stringfellow, Karen Worthy, Thien Nguyen, Pamela J Wright, Jason M O\u27Kane In the originally published paper, the ORCID of author Cynthia F Corbett was incorrectly published as follows: 0000-0002-2254-6958 This has been corrected to: 0000-0003-2706-2116 In the originally published paper, the email of the Corresponding Author was incorrectly published as follows: [email protected] This has been corrected to: [email protected] The correction will appear in the online version of the paper on the JMIR Publications website on January 27, 2022, together with the publication of this correction notice. Because this was made after submission to PubMed, PubMed Central, and other full-text repositories, the corrected article has also been resubmitted to those repositories
Crab antics? Contesting and perpetuating status hierarchies in professional service firms.
No full textArticleThis is a pre-copyedited, author-produced PDF of an article accepted for publication in Journal of Professions and Organization following peer review. The version of record Stringfellow, L. & Thompson, A., Crab antics? Contesting and perpetuating status hierarchies in professional service firms Journal of Professions and Organization first published online June 19, 2014 doi:10.1093/jpo/jou001 is available online at: http://jpo.oxfordjournals.org/content/early/2014/06/19/jpo.jou001The focus of this research is a multi-level theory building exercise that highlights how status hierarchies are perpetuated, contested, and produced in small firm environments. Through eliciting the narratives of the owners of small accounting practices, we aim to explore the specific dynamics of status and to identify how informants come to understand, perpetuate, and change notions of status within their organizational field. We identify macro-theoretical perspectives through the notion of ‘status framing’, which unpacks the professional norms, institutional logics, and marketplace structures that shape industry practice and understanding. Drawing from micro-level perspectives of ‘status sensemaking’, we highlight how industry members create their own status perceptions that effectively legitimize, reinforce, and contradict industry status archetypes. We highlight the ‘crab antic’ nature to these status battles through narratives of ‘status reconciliation’, where informants effectively negotiate macro and micro status hierarchies. We explicate practice through linking the micro and macro realms of experience in small professional practices and identify how status is socially organized within the accounting profession. In doing so, we contribute to the status literature by highlighting that status is not a unified, stable concept, but one that is highly volatile and often undermined by actors vested in perpetuating the status quo
A Voice to Contradict Death: William Stringfellow’s Victories of Life
No full textWilliam Stringfellow perceived the power of death at work in the social wrongs of his era and throughout a fallen creation. He resisted death’s false idols and demands by living a biblical politics and an unrelenting faith. Stringfellow was a prophet whose life and theology were sacramental in their way, outward signs of Christ’s victory of life over death. Stringfellow’s life is a parable of hope. He offers death-defying reminders of salvation in God, despite all that would diminish us
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