Academic literature on the topic 'Deferred time assessment'
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Journal articles on the topic "Deferred time assessment"
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Mulla, Faruq Ibrahimbhai, and Kailash Sukhram Inaniya. "Assessment of donor return following temporary deferral in camp as well as in-house donors) in a blood bank attached to tertiary care hospital." International Journal of Research in Medical Sciences 5, no. 5 (April 26, 2017): 1846. http://dx.doi.org/10.18203/2320-6012.ijrms20171584.
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Background: In India, about 60% of donation is through voluntary blood donors. However, about one third already motivated blood donors are deferred due to stringent screening criteria, either temporarily or permanently. The temporarily deferred donors could be a good source of blood donation after deferral period. The objective of this study was to know the main causes of pre-donation deferral in potentially healthy prospective blood donors, to investigate impact of deferral on donation pattern and to evaluate impact of post deferral counseling on donation pattern.Methods: The present study is carried out in A. D. Gorwala blood bank in Anand, Gujarat from April 2014 to September 2015. All donors screened as per the guideline and deferred donors are categorized as temporary and permanently deferred donors. A Comparison group of healthy eligible donors who donate blood at ADGBB is also studied to determine impact of deferral on donation pattern. From temporarily deferred donors, reason for deferral is considered. At the time of deferral, donors properly counseled, clearly informed about the reason of deferral and corrective actions are taken. As per reason of deferral, time duration for recalling the donor is defined. Based on this, donor is called back to donate again for up to six month’s period after expiration of deferral period.Results: Total 12.57% donors were deferred temporarily. Significant female preponderance was observed (58.7% vs 8.90%). Low hemoglobin (60.9%) was the most common reason of temporary deferral followed by abnormal BP and medicine ingestion. Total 378 donors were responded back out of 953 of deferred donors compare to 645 in non-deferred group. Middle age, male, repeat donors, in-house donors, high education, high socio-economic status, shorter duration of deferral appears to significantly predict donor return. In the evaluation of reasons of the re-deferral, Low hemoglobin was the prime reason. Unfavourable location, lack of time and change in job/college are major barrier to donor return. Total 39.60% response observed after post deferral counseling in present study compared to 11.20% in year 2013-2014.Conclusions: Efforts to increase the hemoglobin will improve the donor retention and overall blood safety can be increased. Temporary deferral has negative impact on donor return and duration of response after expiration of deferral, both in first time and repeat donors. Interventions to increase return behavior need to be better targeted at specific donor groups and it should be developed according to major barriers to donor return prevalent in particular region mainly through more effective communication with donors. Education, motivation, post deferral counseling.
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Greffin, Klara, Holger Muehlan, Samuel Tomczyk, Ariane Suemnig, Silke Schmidt, and Andreas Greinacher. "In the Mood for a Blood Donation? Pilot Study about Momentary Mood, Satisfaction, and Return Behavior in Deferred First-Time Donors." Transfusion Medicine and Hemotherapy 48, no. 4 (2021): 220–27. http://dx.doi.org/10.1159/000514016.
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<b><i>Introduction:</i></b> To maintain a sufficient donor pool, deferred first-time donors (FTD) should be motivated to return for blood donation. This pilot study investigates how deferral affects momentary mood, satisfaction with the donation process, and subsequent return behavior to examine their potential for motivating (deferred) FTD. <b><i>Methods:</i></b> All of the subjects (<i>n</i> = 96) completed a first questionnaire (A1) before pre-donation assessment. Deferred FTD (<i>n</i> = 22) were asked to complete a second questionnaire (A2) immediately after deferral, while non-deferred FTD (<i>n</i> = 74) filled in the second questionnaire (A3) after blood donation. The impact of deferral, momentary mood, and satisfaction with the donation process on return behavior within 12 months was tested by calculating two path analyses, controlling for sex and age. <b><i>Results:</i></b> Mood (<i>p</i> < 0.001) and satisfaction with social aspects of the donation process (<i>p</i> = 0.01) were decreased after deferral. Deferred FTD were less likely than non-deferred FTD to return to the blood donation center within 12 months (60.8 vs. 36.4%; <i>p</i> = 0.043). However, path analyses revealed that deferral effects on mood and satisfaction were not connected to return behavior. Instead, age had a significant influence on return behavior (<i>p</i> < 0.05) such that, overall, non-returning FTD were older than returning FTD, regardless of their deferral status. <b><i>Conclusion:</i></b> Our findings suggest that mood and satisfaction with the donation process are directly affected by deferral but not clearly responsible for low return rates. It seems promising to embed these variables in established health behavior models in further studies to increase the return rates of deferred FTD.
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Siragusa, Sergio, Alessandra Malato, Antonino Giarratano, Francesco Falaschi, Fernando Porro, Maria Cristina Buonanno, Elena Maggi, Raffaela Anastasio, Lucio Lo Coco, and Guglielmo Mariani. "Objective Assessment of Pulmonary Embolism Can Be Deferred without Increased Risk." Blood 106, no. 11 (November 16, 2005): 1628. http://dx.doi.org/10.1182/blood.v106.11.1628.1628.
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Abstract Background. Management of patients with suspected Pulmonary Embolism (PE) is problematic if diagnostic imaging is not available. Pretest Clinical Probability (PCP) and D-dimer (D-d) assessment were shown to be useful to identify those high risk patients for whom empirical, protective anticoagulation is indicated (Siragusa S et al. Arch Intern Med2004;164:2477–82). Objective of the study. In consecutive patients with suspected PE, we evaluated whether PCP and D-d assessment, together with the use of low molecular weight heparins (LMWHs), allow objective appraisal of PE to be deferred for up to 72 hours. Methods. In case of deferment of diagnostic imaging for PE, patients identified at high-risk (those with high PCP and those with moderate PCP and a positive D-d), received a protective full-dose treatment of LMWH; the remaining patients were discharged without anticoagulants. All patients were scheduled to undergo objective tests for PE (ventilation/perfusion lung scanning or computed tomography lung scan) within 72 hours from the index visit (figure). Standard antithrombotic therapy was then administered when diagnostic tests confirmed Venous ThromboEmbolism (VTE). Results. 336 patients with suspected PE were included in this study. The prevalence of VTE was 6.1% (95% CI 2.7–9.3) in the “low-risk group” and 50.4% (95% CI 41.7–59.1) in the “high-risk group”. In total, VTE was confirmed in 76 (22.6%) of 336 patients (95% CI 18.2–27). Patients’ characteristics, median time for deferral test and for LMWH administration are listed in table 1. Events at the short-term (72 hours) and long-term follow-up are listed in table 2. None of the patients had major bleeding events during the follow-ups. Conclusions. When objective diagnostic assessment of PE is not immediately available, management of symptomatic PE patients can prove highly unsatisfactory. This study demonstrates that a simple and reproducible approach allows a safe deferral of diagnostic imaging for PE for up to 72 hours. patients’ characteristics Baseline features Low risk group (n. 211) High-risk group (n. 125) p value n.s.: not significant Age in years (range) 59.3 (22–91) 60.3 (23–91) n.s. Sex (F/M) 98/113 59/66 n.s. Time since onset of symptoms (days) 1.7 1.5 n.s. Co-morbidity and 16 (7.5) 25 (19.2) 0.03 Median time of deferral test (hours) 49.5 42.5 n.s. Median time of protective anticoagulation (hours) not applicable 35.5 not applicable Outcome of Short- and Long-term FU Categories of patients (n) Events at the short-term FU Events at the long -term FU* FU indicates follow-up; CI indicates Confidence Intervals. *This refers to patients in whom Pulmonary Embolism has been previously ruled out (n. 260). “Low-risk group” (211) 0 (0%) [95% CI 1.4] 0 (0%) [95% CI 1.4] “High-risk group” (125) 1 (0.8%) [95% CI 2.3] 3 (2.4%) [95% CI 3.2] Patients clinically suspected of PE without immediate availability of diagnostic tests Patients clinically suspected of PE without immediate availability of diagnostic tests
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Gohel, Manjit S., Francine Heatley, Xinxue Liu, Andrew Bradbury, Richard Bulbulia, Nicky Cullum, David M. Epstein, et al. "Early versus deferred endovenous ablation of superficial venous reflux in patients with venous ulceration: the EVRA RCT." Health Technology Assessment 23, no. 24 (May 2019): 1–96. http://dx.doi.org/10.3310/hta23240.
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Background Venous ulceration is a common and costly health-care issue worldwide, with poor healing rates greatly affecting patient quality of life. Compression bandaging has been shown to improve healing rates and reduce recurrence, but does not address the underlying cause, which is often superficial venous reflux. Surgical correction of the reflux reduces ulcer recurrence; however, the effect of early endovenous ablation of superficial venous reflux on ulcer healing is unclear. Objectives To determine the clinical effectiveness and cost-effectiveness of compression therapy with early endovenous ablation of superficial venous reflux compared with compression therapy with deferred endovenous ablation in patients with venous ulceration. Design A pragmatic, two-arm, multicentre, parallel-group, open randomised controlled trial with a health economic evaluation. Setting Secondary care vascular centres in England. Participants Patients aged ≥ 18 years with a venous leg ulcer of between 6 weeks’ and 6 months’ duration and an ankle–brachial pressure index of ≥ 0.8 who could tolerate compression and were deemed suitable for endovenous ablation of superficial venous reflux. Interventions Participants were randomised 1 : 1 to either early ablation (compression therapy and superficial endovenous ablation within 2 weeks of randomisation) or deferred ablation (compression therapy followed by endovenous ablation once the ulcer had healed). Main outcome measures The primary outcome measure was time from randomisation to ulcer healing, confirmed by blinded assessment. Secondary outcomes included 24-week ulcer healing rates, ulcer-free time, clinical success (in addition to quality of life), costs and quality-adjusted life-years (QALYs). All analyses were performed on an intention-to-treat basis. Results A total of 450 participants were recruited (224 to early and 226 to deferred superficial endovenous ablation). Baseline characteristics were similar between the two groups. Time to ulcer healing was shorter in participants randomised to early superficial endovenous ablation than in those randomised to deferred ablation [hazard ratio 1.38, 95% confidence interval (CI) 1.13 to 1.68; p = 0.001]. Median time to ulcer healing was 56 (95% CI 49 to 66) days in the early ablation group and 82 (95% CI 69 to 92) days in the deferred ablation group. The ulcer healing rate at 24 weeks was 85.6% in the early ablation group, compared with 76.3% in the deferred ablation group. Median ulcer-free time was 306 [interquartile range (IQR) 240–328] days in the early ablation group and 278 (IQR 175–324) days in the deferred endovenous ablation group (p = 0.002). The most common complications of superficial endovenous ablation were pain and deep-vein thrombosis. Differences in repeated measures of Aberdeen Varicose Vein Questionnaire scores (p < 0.001), EuroQol-5 Dimensions index values (p = 0.03) and Short Form questionnaire-36 items body pain (p = 0.05) over the follow-up period were observed, in favour of early ablation. The mean difference in total costs between the early ablation and deferred ablation groups was £163 [standard error (SE) £318; p = 0.607]; however, there was a substantial and statistically significant gain in QALY over 1 year [mean difference between groups 0.041 (SE 0.017) QALYs; p = 0.017]. The incremental cost-effectiveness ratio of early ablation at 1 year was £3976 per QALY, with a high probability (89%) of being more cost-effective than deferred ablation at conventional UK decision-making thresholds (currently £20,000 per QALY). Sensitivity analyses using alternative statistical models give qualitatively similar results. Limitations Only 7% of screened patients were recruited, treatment regimens varied significantly and technical success was assessed only in the early ablation group. Conclusions Early endovenous ablation of superficial venous reflux, in addition to compression therapy and wound dressings, reduces the time to healing of venous leg ulcers, increases ulcer-free time and is highly likely to be cost-effective. Future work Longer-term follow-up is ongoing and will determine if early ablation will affect recurrence rates in the medium and long term. Trial registration Current Controlled Trials ISRCTN02335796. Funding This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 23, No. 24. See the NIHR Journals Library website for further project information.
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Lee, Byeong-Ryul. "A Comparative Assessment on the Real-Time Gross System in America." Korea International Trade Research Institute 18, no. 3 (June 30, 2022): 81–93. http://dx.doi.org/10.16980/jitc.18.3.202206.81.
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Purpose The aim of this study is to compare the real-time gross system in America. Comparative analysis of precedent research, features and operational polices between Fedwire and FedNow was performed for research purposes. Design/Methodology/Approach The paper is organized as follows. In Section , the necessity and purpose of research this paper is outlined. In Section , outlines previous research in domestic and foreign literature and the development process the real-time gross system in America. Section contains a comparative explain of the operational polices ofthe central bank. payment liquidity, services resilience and payment reserves. Section contains a comparative analysis competitiveness evaluation including fees, legal stability, services accessibility, account methods and feedback between Fedwire and FedNow. Section summarizes and suggests that the payment system have more efficience, accuracy, and security with the remaining conclusions. Findings Fedwire Funds Service is a real-time gross settlement system that enables participants to initiate fund transfers that are immediate, final, and irrevocable once processed. The Fedwire Funds Service business day begins at 9:00 p.m. eastern time (ET) on the preceding calendar day and ends at 7:00 p.m. ET, Monday through Friday, excluding designated holidays. The FedNow Service will be designed to maintain uninterrupted 24x7x365 processing with security features to support payment integrity and data security. The service will have a 24-hour business day each day of the week, including weekends and holidays.Write the Findings of you research here. Research Implications In this paper, I would like to suggest the necessity of converting Korea’s current deferred-netting system to the real-time gross system.
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Gilmore, Natalie, Daniel Mirman, and Swathi Kiran. "Young Adults With Acquired Brain Injury Show Longitudinal Improvements in Cognition After Intensive Cognitive Rehabilitation." Journal of Speech, Language, and Hearing Research 65, no. 4 (April 4, 2022): 1494–520. http://dx.doi.org/10.1044/2021_jslhr-21-00324.
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Purpose: The aim of this study was to assess the effect of an intensive cognitive and communication rehabilitation (ICCR) program on language and other cognitive performance in young adults with acquired brain injury (ABI). Method: Thirty young adults with chronic ABI participated in this study. Treatment participants ( n = 22) attended ICCR 6 hours/day, 4 days/week for at least one 12-week semester. Deferred treatment/usual care control participants ( n = 14) were evaluated before and after at least one 12-week semester. Pre- and postsemester standardized cognitive assessment items were assigned to subdomains. Between-groups and within-group generalized linear mixed-effects models assessed the effect of time point on overall item accuracy and differences by item subdomain. Subdomain analyses were adjusted for multiple comparisons. Results: Between-groups analyses revealed that treatment participants improved significantly faster over time than deferred treatment/usual care participants in overall item accuracy and specifically on items in the verbal expression subdomain. Investigating the three-way interaction between time point, group, and etiology revealed that the overall effects of the treatment were similar for individuals with nontraumatic and traumatic brain injuries. The treatment group showed an overall effect of treatment and significant gains over time in the verbal expression, written expression, memory, and problem solving subdomains. The control group did not significantly improve over time on overall item accuracy and showed significant subdomain-level gains in auditory comprehension, which did not survive correction. Conclusions: Sustaining an ABI in young adulthood can significantly disrupt key developmental milestones, such as attending college and launching a career. This study provides strong evidence that integrating impairment-based retraining of language and other cognitive skills with “real-world” application in academically focused activities promotes gains in underlying cognitive processes that are important for academic success as measured by standardized assessment items. These findings may prompt a revision to the current continuum of rehabilitative care for young adults with ABI. Supplemental Material: https://doi.org/10.23641/asha.19320068
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Ostashchenko, T. V., and I. N. Dubina. "ASSESSMENT OF REGIONAL INTELLECTUAL CAPITAL AND ITS CORRELATION WITH THE LEVEL OF ECONOMIC DEVELOPMENT OF THE ALTAI REGION AND THE SIBERIAN FEDERAL DISTRICT." Economics Profession Business, no. 4 (December 10, 2020): 98–107. http://dx.doi.org/10.14258/epb2019106.
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The article discusses and comparatively analyses the dynamics of the level of intellectual capital and indicators of economic development of the Altai Region and the regions of the Siberian Federal District based on the author’s approach to the assessment of intellectual capital as a factor of economic development. A decrease in the competitiveness of the Altai Region in the field of education, research and development, innovation activity across the Russian Federation and the Siberian Federal District was found. Criteria of the effective transformation of regional intellectual potential into regional intellectual capital and regional innovation activity, as well as criteria of the effective use of intellectual capital as a factor of regional economic development are proposed. The deferred (time lag) effects of the impact of intellectual capital on the economic development of the regions of the Siberian Federal District are evaluated.
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Hill, Arleen, John Bevington, Rachel Davidson, Stephanie Chang, Ronald Eguchi, Beverley Adams, Susan Brink, et al. "Community-Scale Damage, Disruption, and Early Recovery in the 2010 Haiti Earthquake." Earthquake Spectra 27, no. 1_suppl1 (October 2011): 431–46. http://dx.doi.org/10.1193/1.3624964.
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This study seeks to assess the levels of community-scale building damage and socioeconomic disruption following the January 2010 Haiti earthquake. Damage and disruption were analyzed for pre-event, post-event, and early recovery time periods in seven Haitian communities—three inside and four outside Port-au-Prince. Damage datasets from the Global Earth Observation-Catastrophe Assessment Network (GEO-CAN) postdisaster assessment were combined with analyses of fine-resolution satellite and aerial imagery to quantify building damage and recovery status, and were verified with field data. Disruption was assessed using community-level data obtained from interviews conducted in May 2010 with community leaders, NGOs, and government utility providers. The data pertain to 11 sectors, including shelter, livelihoods, and social networks. The findings document severe disruption and uneven restoration four months after the earthquake. Disruption showed little correlation with physical damage. Observations suggest that the impacts of the earthquake must be understood in the context of chronic disruption, and many consequences of the earthquake are merely deferred during recovery.
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Shetty, Kishore, and Vinay Vaidyanathan. "Intracranial and Orbital Complications of Sinusitis: A Case Series and Review of Literature." An International Journal Clinical Rhinology 4, no. 2 (2011): 87–92. http://dx.doi.org/10.5005/jp-journals-10013-1080.
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ABSTRACT Complications of paranasal sinus infection most often involve the orbit and periorbita. Because of widespread use of antibiotics, intracranial extension of paranasal sinusitis is rarely seen today. Nevertheless, the clinician must be aware of the potential of these complications, as late recognition of this condition and delay in treatment can increase morbidity and mortality rates. An interesting case series of sinusitis with orbital and intracranial complication is presented, which was radiologically evaluated, and was managed by endoscopic sinus surgery with drainage of subdural empyema by appropriate neurosurgical technique. The radiological tools played a very important role in both assessment and timing of surgical intervention. Unparallel role of radiological investigations cannot be overemphasized. The key to successful treatment is aggressive management and the timing for surgical intervention should not be deferred. The patients made full recovery at the time of discharge.
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Tamindžić, Gordana, Maja Ignjatov, Dragana Milošević, Zorica Nikolić, Aleksandra Nastasić, Dušica Jovičić, and Jasna Savić. "Assessment of quality and viability of primed maize seed." Ratarstvo i povrtarstvo 57, no. 3 (2020): 87–92. http://dx.doi.org/10.5937/ratpov57-26575.
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Good crop establishment is essential for achieving high yield and constraints to good establishment include untimely sowing and low seed quality combined with various adverse growing conditions after sowing. Seed priming is a pre-sowing technique used for the improvement of germination, reduction of the time from sowing to emergence and improvement of emergence uniformity. Various seed priming techniques, such as hydropriming and priming with zinc, are used nowadays to improve crop establishment. The importance of seed priming with zinc for better germination, improved stand establishment, and higher maize yield are well documented. However, there is still a lack of results on the effects of seed priming with water and zinc on seed quality and viability, given that maize seed can be kept in storage for many years without a significant reduction in germination. The study was aimed to evaluate the effects of seed priming with water and Zn on the quality and viability of the maize seed. In order to evaluate the response of four maize hybrids to priming with water (hydropriming) and 4 mM zinc sulphate, primed seeds were subjected to laboratory tests, namely to the germination test, the cold test, and the accelerated aging test. Both priming treatments increased the seed quality, but the beneficial effect of Zn-priming maintained to a larger extent than hydropriming in cold-treated and aged seeds. The negative effects of hydropriming on the viability o f the aged seed of hybrid NS 4023 imply a possible limitation to deferred sowing of primed maize seed.
Book chapters on the topic "Deferred time assessment"
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Uzcategui, Nicolas. "Eyelid Lacerations and Acute Adnexal Trauma." In Surgery of the Eyelid, Lacrimal System, and Orbit. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780195340211.003.0005.
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When evaluating a patient who has sustained any type of trauma, life-threatening injuries should be addressed or ruled out before proceeding with assessment for ocular and adnexal trauma. In the setting of trauma the practitioner must never forget the basics of life support and systemic trauma assessments. The first goals are to maintain a patent airway and to provide respiratory support. Adequate circulation and perfusion need to be reestablished once an airway has been established. The nature of the accident should alert the practitioner as to the possibility of a cervical spine injury. In accidents that are unwitnessed, that produce loss of consciousness, and/or that are produced by high-velocity impacts to the head, face, and neck, the patient should have C-collar stabilization/immobilization until the cervical spine can be cleared both radiologically and clinically. Only then should ocular and adnexal injuries be assessed. Adnexal trauma is addressed only after the integrity of the globe and intraocular contents has been confirmed by a complete eye examination. A dilated funduscopic examination can be deferred for a reasonable amount of time if a neurologic injury and central nervous system compromise is suspected, since the use of mydriatic agents is a relative contraindication in these circumstances. If a facial nerve injury is not present and/or a ruptured globe has been excluded, the extent of the eyelid and adnexal injuries can be safely determined. Complex lacerations of the eyelid often include extensive wounds involving the eyelid margin, canaliculi, and lateral canthus; these can be associated with tissue loss and can be caused either by sharp objects or bite injuries. In general it is preferable to repair soft tissue injuries within hours of their occurrence; nevertheless, special considerations can delay the primary repair in exceptional circumstances such as severe tissue edema, active infection at the wound site, or extensive hematomas. Intermittent ice compresses, drainage of hematomas, and systemic steroids and/or antibiotics can be instituted prior to repair if swelling or infections limit the possibility of reconstruction. Local wound care and sometimes topical antibiotics are a cornerstone of management in adnexal injury.
Conference papers on the topic "Deferred time assessment"
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Ramuhalli, Pradeep, Arun Veeramany, Christopher A. Bonebrake, William J. Ivans, Garill A. Coles, and Evelyn H. Hirt. "Evaluation of Enhanced Risk Monitors for Use on Advanced Reactors." In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60040.
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This study provides an overview of the methodology for integrating time-dependent failure probabilities into nuclear power reactor risk monitors. This prototypic enhanced risk monitor methodology was evaluated using a hypothetical probabilistic risk assessment (PRA) model, generated using a simplified design of a liquid-metal-cooled advanced reactor (AdvRx). Component failure data from industry compilation of failures of components similar to those in the simplified AR model were used to initialize the PRA model. Core damage frequency (CDF) over time were computed and analyzed. In addition, a study on alternative risk metrics for AdvRx was conducted. Risk metrics that quantify the normalized cost of repairs, replacements, or other operations and management (O&M) actions were defined and used, along with an economic model, to compute the likely economic risk of future actions such as deferred maintenance based on the anticipated change in CDF due to current component condition and future anticipated degradation. Such integration of conventional-risk metrics with alternate-risk metrics provides a convenient mechanism for assessing the impact of O&M decisions on safety and economics of the plant. It is expected that, when integrated with supervisory control algorithms, such integrated-risk monitors will provide a mechanism for real-time control decision-making that ensure safety margins are maintained while operating the plant in an economically viable manner.
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Ortega Estrada, Ce´sar E., and David De Le´on Escobedo. "Development of a Cost-Benefit Model for Inspection of Offshore Jacket Structures in Mexico." In ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2003. http://dx.doi.org/10.1115/omae2003-37062.
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Planning of inspections is an important task for optimal maintenance of a jacket platform system, and the current practice has been based mostly on judgment and experience. Given the limited resources available for maintenance, there is a growing interest of PEMEX in the optimization of inspection strategies. In order to make easier and more practical the determination of the inspection strategies, in this work, it is assumed that inspections are performed at a constant time interval. A strategy is formulated so that the elements with larger failure probability have priority over other components in the inspection schedule. In this paper, the areas most prone to be damaged are identified, the frequency of damage as a function of its depth in a platform is studied, the levels of damage on joints and elements are identified to define the levels of repair, and the importance of each element is selected according to its capacity to contribute on the base shear resistance of the platform. In addition, a fatigue analysis of the platform is performed to identify the joints most prone to be cracked by fatigue, and to estimate the evolution of damage, where limits in measures for crack magnitude are found and a uniform probability distribution for crack magnitudes on joints are proposed. Several inspection intervals are proposed, their corresponding life-cycle costs are estimated and the optimal schedule is chosen so that the expected life-cycle cost is minimized. The expected costs associated with the no failure event include the costs of inspection and repair whereas the expected failure costs involve the potential consequences of damaged equipment, cost associated with the pollution by crude oil, injuries, cost of avoiding the loss of life, deferred production and indirect loss. In this paper, indirect losses are estimated through an assessment based on the concepts of the Leontief’s input-output model. In addition, relationships between each item costs and the global damage index are proposed. As before mentioned, the optimal inspection schedule corresponds to the minimum life-cycle cost.
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Guzman, Rodrigo A., Tariq Abdulla Al Junaibi, Fouad Abdulsallam, Mohamed Elmaghraby Hewala, Hector Aguilar, Indra Utama, Maryam Mohammed Alnaqbi, and Haris Shakeel Abbasi. "Artificial Lift Rigless Opportunity to Re-Activate the Inactive Wells Inventory an a Middle East Mega-Field After a Successful Pilot of a Best Practices and New Technology With Jet Pump." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207256-ms.
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Abstract A Gulf oil operation company has been working to evaluate a rigless method of Artificial Lift System (ALS) suitable for its current assets and any future needs on ALS to minimize the impact of deferred production, and having the flexibility to bringing back the inactive string to production and act as a sustained production lift method. This paper describes a comprehensive study of the main objectives for a rigless Artificial Lift trial. The Rigless Jet Pump system was selected as one of the ALS fast implementation methods to activate the inactive wells. The trial was conducted in two inactive wells; across two different mega-fields, enabling both wells to produce stably and continuously with an average production rate of 650 BOPD. A thorough assessment was performed and the Rigless Jet Pump System was declared as a successful pilot providing confidence to scale up across all the company fields. The scale-up plans it will include 10 systems that can be rotated and applied where needed across all company fields. The trial implementation of the Rigless Jet Pump was evaluated based on supply and the connectivity in the field. This includes equipment mobilization (from the call-out time), availability of the field resources, the installation job, and up to the Surface Equipment connectivity plan. The evaluation also closely monitored the subsequence rig-up procedure and rigless deployment of the downhole equipment which was designed for installation straddled across an existing gas lift side pocket mandrel. Once surface and subsurface installation was completed, the wells were put on production to reactivate the inactive strings. Both wells were tested to confirm the achievement of a minimum of 80% of the designed production rates. The performance of the rigless activation of inactive wells using a jet pump has been proven successful. Both wells showed promising results while jet pump operation confirming a profitable alternative to accelerate production across fields toward achieving production mandates. The performance of the system delivered the Efficiency and Safety (HSE & Integrity) expected as part of the project KPI's. This novel practice for the Jet Pump System is linked to the rigless deployment and retrieval mechanism with topside equipment skid mounted for easy movement to other wells. This gives to the oil field operators an alternative and competitive edge over other modes of lift that required a workover program. The rigless method can be adapted to the existing in-active wells with SPM (side Pocket Mandrels) or without; by a tubing punch after a comprehensive integrity evaluation.
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Dady, Johnathan Eugene. "Asset Lifecycle Management – The Digital Solution." In Offshore Technology Conference. OTC, 2021. http://dx.doi.org/10.4043/31034-ms.
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Abstract The challenges presented in the current market environment demand operational efficiency with low risk tolerance. Maximizing uptime and reducing unplanned events is paramount to preserve revenue. Asset Lifecycle Management (ALCM) is a strategy built to capitalize on the use of data analytics, superior system integration, and comprehensive condition assessments. This strategy is intended to produce significant benefits and maximize shareholder return through the optimization of maintenance, operations, and inventory. Traditional schedules of maintaining equipment can be replaced with automated analytics enhanced by equipment design knowledge and historical data. Developing technology enables a cost-effective means of applying this capability. Monitoring equipment condition and advanced analysis of equipment data compared to design parameters and historical performance provides valuable insight into the actual usage and lifecycle of the equipment. Design life utilization (usage) of critical load path drilling equipment can be determined by comparing how much work the equipment has done to how much work it was designed to do. This paper explores new methods of analyzing operational and equipment data, enabling the creation of robust usage models. These models are compared with the analysis of vibration, oil, fatigue, dimensional, and other physical inspection data. This empowers a comprehensive usage and condition monitoring paradigm that is data driven. Case studies performed on multiple drilling rigs proves extremely low usage and supports the deferral of traditional 5-year overhauls on this equipment. Modeling of normal operations is also explored, and a hook load model is created. The statistical analysis available from this operating model is compared to historical operational and maintenance records and proves to track an actual failure, thus substantiating value for anomaly detection if used real-time.
Reports on the topic "Deferred time assessment"
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Nehring, Natalia, and Simon Dacey. Formative vs Summative Quizzes as Regular Feedback on Moodle in Computer Science Courses: Which do Students Prefer? Unitec ePress, November 2021. http://dx.doi.org/10.34074/ocds.090.
Full textAbstract:
Deferred feedback on summative assessments can demotivate students and affect their overall learning performance, and it can change their study routines. The aim of this study is to compare and analyse students’ perceptions about summative and formative regular feedback: whether they are better motivated by being given marks, or by regular feedback without any marks. All participants were students from a Bachelor of Computer Science (BCS) degree at a New Zealand tertiary institute. Three courses were selected across three different levels of the BCS, and the sample group included 272 students from five different semesters. Summative (with marks) and formative (with feedback only) weekly quizzes were introduced in 2017, with the aim of providing early, regular feedback to students. Participants in the study were divided into two groups: students who were doing formative, and those who were doing summative quizzes. In each group, the majority of students indicated that they were happy and positive about getting regular feedback in the form of quizzes, and they appreciated the quiz questions and time spent as a way to adjust and enhance their learning. There was no real difference in students’ subjective evaluations and individual perceptions between those who had summative and those who had formative quizzes. The existence of quizzes, and the results, were important for students as weekly feedback and it didn’t matter whether marks were attached to these weekly feedback activities or not. More studies are needed to determine what type of questions could better influence students’ learning outcomes.