Academic literature on the topic 'Adjusted mean numbers'
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Journal articles on the topic "Adjusted mean numbers"
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SHAH, AMI A., FREDRICK M. WIGLEY, and LAURA K. HUMMERS. "Telangiectases in Scleroderma: A Potential Clinical Marker of Pulmonary Arterial Hypertension." Journal of Rheumatology 37, no. 1 (December 1, 2009): 98–104. http://dx.doi.org/10.3899/jrheum.090697.
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Objective.Clinical markers are needed to identify scleroderma patients at risk for pulmonary arterial hypertension (PAH) since early therapy may improve survival. We investigated whether increased numbers of telangiectases in scleroderma associate with measures of pulmonary vascular disease.Methods.One hundred forty-seven consecutive adult patients with scleroderma were enrolled in this cross-sectional study and scored for the presence of matted telangiectases on 11 body areas. Per body area, telangiectases were scored as 0 if none were present, 1 if there were fewer than 10 telangiectases, and 2 if 10 or more telangiectases were counted. Linear regression analysis was performed to assess the association between right ventricular systolic pressure (RVSP) and telangiectasia score, adjusted for age, race, smoking status, scleroderma subtype, disease duration, and autoantibody status. Logistic regression analysis was performed with PAH by right-heart catheterization (RHC) as the dependent variable.Results.The mean telangiectasia score was 6.0 (SD 4.5, range 0–20). RVSP and telangiectasia score were positively correlated (r = 0.271, p = 0.001). The mean RVSP increased by 10.9 mm Hg for every 10-point increase in telangiectasia score (95% CI 3.6–18.3 mm Hg, p = 0.004), adjusted for potential confounders. The adjusted relative odds of PAH by RHC were 12.4 for patients with a 10-point increase in telangiectasia score (95% CI 1.78–85.9, p = 0.01).Conclusion.Increased numbers of telangiectases strongly associate with the presence of pulmonary vascular disease. Telangiectases may be a clinical marker of more widespread aberrant microvascular disease in scleroderma.
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Peque, Dennis. "On Using Adaptive Cluster Sampling Design in Forest Inventory: It's Implication to Forest Biodiversity Status Reporting." Science and Humanities Journal 9, no. 1 (December 1, 2009): 56–66. http://dx.doi.org/10.47773/shj.1998.091.5.
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This paper presents adaptive cluster sampling (ACS) as a method of assessing forest biodiversity. In this study, ACS was used to estimate the abundance of ecologically sparse population of Diospyros philippinensis (Desrousseaux) within the Visayas State University Forest Reserve. Its statistical efficiency were analyzed by comparing them to the conventional systematic sampling (Syst) estimator. Results indicated that adaptive cluster sampling (ACS) plots captured more trees into the sample compared to systematic sampling (Syst) plots. In addition, ACS estimates for mean and total numbers of individuals per ha was higher than systematic sampling estimates and in terms of variance ACS gave substantially lower variance than systematic sampling. However, the ratio of the adjusted SE of ACS to the adjusted SE of systematic sampling for each species and the combined data of the two species was generally lesser than 1 which means that ACS was not a better design than systematic sampling.
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Dommershuijsen, Lisanne J., Rikje Ruiter, Nicole S. Erler, Dimitris Rizopoulos, M. Arfan Ikram, and M. Kamran Ikram. "Peripheral Immune Cell Numbers and C-Reactive Protein in Parkinson’s Disease: Results from a Population-Based Study." Journal of Parkinson's Disease 12, no. 2 (February 15, 2022): 667–78. http://dx.doi.org/10.3233/jpd-212914.
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Background: The immune system is known to be involved in Parkinson’s disease (PD) pathogenesis, but the temporal relationship between peripheral immune responses and PD remains unknown. Objective: We determined the association between peripheral immune cell numbers, C-reactive protein (CRP), and prevalent as well as incident PD. Methods: This study was embedded in the population-based setting of the Rotterdam Study. We repeatedly measured peripheral immune cell numbers (differential leukocyte count and platelet count, granulocyte-to-lymphocyte ratio [GLR], platelet-to-lymphocyte ratio [PLR], and adapted systemic immune-inflammation index [adapted SII]) and CRP between 1990 and 2016. Participants were continuously followed-up for PD until 2018. We estimated the association of the markers with prevalent and incident PD using logistic regression models and joint models, respectively. Models were adjusted for age, sex, smoking, body mass index, and medication use. Odds ratios (OR) and hazard ratios (HR) are shown per doubling of the marker. Results: A total of 12,642 participants were included in this study. The mean age (standard deviation) was 65.1 (9.8) years and 57.5%were women. Participants with a higher lymphocyte count were less likely to have prevalent PD (adjusted OR: 0.34, 95%CI 0.17–0.68). Participants with a higher GLR, PLR, and adapted SII were more likely to have prevalent PD, but these effects were explained by the lymphocyte count. The peripheral immune cell numbers and CRP were not significantly associated with the risk of incident PD. Conclusion: We found participants with a higher lymphocyte count to be less likely to have prevalent PD, but we did not find an association between peripheral immune cell numbers nor CRP and the risk of incident PD.
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Cunha, Daniel de Noronha Figueiredo Vieira da, José Carlos Pereira, Fabyano Fonseca e. Silva, Oriel Fajardo de Campos, José Luis Braga, and Janaina Azevedo Martuscello. "Selection of models of lactation curves to use in milk production simulation systems." Revista Brasileira de Zootecnia 39, no. 4 (April 2010): 891–902. http://dx.doi.org/10.1590/s1516-35982010000400026.
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The objective of this study was to select models of lactation curves with a better adjustment to the observed data in models of milk production simulation systems. A data base on 6,459 recordings of daily milk production was used. These data were obtained from monthly and fortnightly controls of milk between 2004 and 2007, from 472 lactations of animals from ten different milking cow herd farms. Based on rolling averages of milk production (MP-L/day) per cow, the ten herd farms were divided into low (L < 15), medium (15 <M < 20) and high (H > 20). Data were also divided according to the lactation numbers in first, second, third or greater. Eight lactation curve models commonly used in literature were compared. The models were individually adjusted for each lactation. The goodness of fit used for comparison of those models was the coefficient of determination, mean square error, mean square prediction error and the Bayesian information criterion. The values for the goodness of fit obtained in each model were compared by using 95% probability confidence interval. Wilmink (1987) model showed a better adjustment for cows of the first lactation numbers, whereas the Wood (1967) model showed a better adjustment for cows of the third or greater lactations numbers for the low milk production groups. Wood model showed a better adjustment for all the lactation numbers for the medium milk production group. Dijkstra (1997) model showed a better adjustment for all lactation numbers for the high milk production group. Despite of being more recent, the model by Pollott (2000), mechanist based and with a higher number of parameters, showed a good convergence for the used data.
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Dilliwar, Leena, Med Ram Verma, Yash Pal Singh, Vijay Bahadur Sharma, Sanjay Kumar, and Ajay Shukla. "Nonlinear modelling of sheep and goat populations in India." Journal of Applied and Natural Science 8, no. 4 (December 1, 2016): 1766–69. http://dx.doi.org/10.31018/jans.v8i4.1037.
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The objective of this paper was to study the trend in population of sheep and goat populations during 1951 to 2012 in India. The data were compiled from various issues of BAHS (Basic Animal Husbandry Statistics) for the period 1951 to 2012. Different nonlinear growth models such as Parabolic/Sikka, Brody, Brody modified, Wood, Logistic and Gompertz models were fitted to the census data of sheep and goat population. The goodness of fit of the models was tested by Coefficient of determination (R2), Adjusted coefficient of determination (R2), Mean Square Error (MSE), Mean Absolute Error (MAE) and Akaike Information Criteria (AIC). The populations of sheep and goat in India during the year 1951 were 39.10 million and 47.20 million numbers respectively and reached 135.17 million and 65.06 million respectively in the year 2012. Based on the various measures of goodness of fit we observed that the Parabolic/Sikka model was the best fitted model for studying the pattern in the populations of sheep and goat in India. This model has been used to project the sheep and goat population in India during 2020, 2025 and 2030. If the present pattern of growth continued in near future then the projected sheep population will be 102.37 million numbers whereas goat population will be 151.57 million numbers in the year 2030. The present study will provide the pattern in which the changes have been observed in sheep and goat populations in India during 1951 to 2012.
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Mistry, Hema. "EXPLORING TWO COST-ADJUSTMENT METHODS FOR SELECTION BIAS IN A SMALL SAMPLE: USING A FETAL CARDIOLOGY DATASET." International Journal of Technology Assessment in Health Care 30, no. 3 (July 2014): 325–32. http://dx.doi.org/10.1017/s026646231400021x.
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Objectives: In economic evaluations of healthcare technologies, situations arise where data are not randomized and numbers are small. For this reason, obtaining reliable cost estimates of such interventions may be difficult. This study explores two approaches in obtaining cost estimates for pregnant women screened for a fetal cardiac anomaly.Methods: Two methods to reduce selection bias in health care: regression analyses and propensity scoring methods were applied to the total mean costs of pregnancy for women who received specialist cardiac advice by means of two referral modes: telemedicine and direct referral.Results: The observed total mean costs of pregnancy were higher for the telemedicine group than the direct referral group (4,918 versus 4,311 GBP). The regression model found that referral mode was not a significant predictor of costs and the cost difference between the two groups was reduced from 607 to 94 GBP. After applying the various propensity score methods, the groups were balanced in terms of sizes and compositions; and again the cost differences between the two groups were smaller ranging from -62 (matching “by hand”) to 333 GBP (kernel matching).Conclusions: Regression analyses and propensity scoring methods applied to the dataset may have increased the homogeneity and reduced the variance in the adjusted costs; that is, these methods have allowed the observed selection bias to be reduced. I believe that propensity scoring methods worked better for this dataset, because after matching the two groups were similar in terms of background characteristics and the adjusted cost differences were smaller.
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Mears, Alex, Tim Kendall, Cornelius Katona, Carole Pashley, and Sarah Pajak. "Retirement intentions of older consultant psychiatrists." Psychiatric Bulletin 28, no. 4 (April 2004): 130–32. http://dx.doi.org/10.1192/pb.28.4.130.
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Aims and MethodThis survey gathered data on the retirement intentions of consultant psychiatrists over the age of 50 years, in order to address retention issues. A questionnaire was sent to all 1438 consultants over this age in the UK.ResultsA total of 848 questionnaires were returned, an adjusted response rate of 59%. The mean age at which consultants intended to retire in this sample was 60 years (s.d. 4.16), suggesting a potential loss of 5725 consultant years. Reasons for early retirement are complex: factors encouraging retirement include too much bureaucracy, lack of free time and heavy case-loads; those discouraging retirement include enjoyment of work, having a good team and money. Mental Health Officer status is an important determinant in the decision to retire early.Clinical ImplicationsWith numerous vacancies in consultant psychiatrist posts throughout the UK, premature retirement is a cause for concern, possibly contributing to an overall reduction in consultant numbers of 5%. Addressing factors that influence consultants' decisions to leave the health service early should form an important part of an overall strategy to increase consultant numbers.
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Vecchi, Gabriel A., and Thomas R. Knutson. "Estimating Annual Numbers of Atlantic Hurricanes Missing from the HURDAT Database (1878–1965) Using Ship Track Density." Journal of Climate 24, no. 6 (March 15, 2011): 1736–46. http://dx.doi.org/10.1175/2010jcli3810.1.
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Abstract This study assesses the impact of imperfect sampling in the presatellite era (between 1878 and 1965) on North Atlantic hurricane activity measures and on the long-term trends in those measures. The results indicate that a substantial upward adjustment of hurricane counts may be needed prior to 1965 to account for likely “missed” hurricanes due to sparse density of reporting ship traffic. After adjusting for the estimate of missed hurricanes in the basin, the long-term (1878–2008) trend in hurricane counts changes from significantly positive to no significant change (with a nominally negative trend). The adjusted hurricane count record is more strongly connected to the difference between main development region (MDR) sea surface temperature (SST) and tropical-mean SST than with MDR SST. These results do not support the hypothesis that the warming of the tropical North Atlantic due to anthropogenic greenhouse gas emissions has caused Atlantic hurricane frequency to increase.
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Bloomfield, Katherine, Zhenqiang Wu, Annie Tatton, Cheryl Calvert, Nancye Peel, Ruth Hubbard, Hamish Jamieson, et al. "An interRAI derived frailty index predicts acute hospitalizations in older adults residing in retirement villages: A prospective cohort study." PLOS ONE 17, no. 3 (March 2, 2022): e0264715. http://dx.doi.org/10.1371/journal.pone.0264715.
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Objectives The development of frailty tools from electronically recorded healthcare data allows frailty assessments to be routinely generated, potentially beneficial for individuals and healthcare providers. We wished to assess the predictive validity of a frailty index (FI) derived from interRAI Community Health Assessment (CHA) for outcomes in older adults residing in retirement villages (RVs), elsewhere called continuing care retirement communities. Design Prospective cohort study. Setting and participants 34 RVs across two district health boards in Auckland, Aotearoa New Zealand (NZ). 577 participants, mean age 81 years; 419 (73%) female; 410 (71%) NZ European, 147 (25%) other European, 8 Asian (1%), 7 Māori (1%), 1 Pasifika (<1%), 4 other (<1%). Methods interRAI-CHA FI tool was used to stratify participants into fit (0–0.12), mild (>0.12–0.24), moderate (>0.24–0.36) and severe (>0.36) frail groups at baseline (the latter two grouped due to low numbers of severely frail). Primary outcome was acute hospitalization; secondary outcomes included long-term care (LTC) entry and mortality. The relationship between frailty and outcomes were explored with multivariable Cox regression, estimating hazard ratios (HRs) and 95% confidence intervals (95%CIs). Results Over mean follow-up of 2.5 years, 33% (69/209) of fit, 58% (152/260) mildly frail and 79% (85/108) moderate-severely frail participants at baseline had at least one acute hospitalization. Compared to the fit group, significantly increased risk of acute hospitalization were identified in mildly frail (adjusted HR = 1.88, 95%CI = 1.41–2.51, p<0.001) and moderate-severely frail (adjusted HR = 3.52, 95%CI = 2.53–4.90, p<0.001) groups. Similar increased risk in moderate-severely frail participants was seen in LTC entry (adjusted HR = 5.60 95%CI = 2.47–12.72, p<0.001) and mortality (adjusted HR = 5.06, 95%CI = 1.71–15.02, p = 0.003). Conclusions and implications The FI derived from interRAI-CHA has robust predictive validity for acute hospitalization, LTC entry and mortality. This adds to the growing literature of use of interRAI tools in this way and may assist healthcare providers with rapid identification of frailty.
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Taira, Kazuya, and Sumio Fujita. "Prediction of Age-Adjusted Mortality From Stroke in Japanese Prefectures: Ecological Study Using Search Engine Queries." JMIR Formative Research 6, no. 1 (January 20, 2022): e27805. http://dx.doi.org/10.2196/27805.
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Background Stroke is a major cause of death and the need for nursing care in Japan, with large regional disparities. Objective The purpose of this study was to clarify the association between stroke-related information retrieval behavior and age-adjusted mortality in each prefecture in Japan. Methods Age-adjusted mortality from stroke and aging rates were obtained from publicly available Japanese government statistics. A total of 9476 abstracts of Japanese articles related to symptoms and signs of stroke were identified in Ichushi-Web, a Japanese web-based database of biomedical articles, and 100 highly frequent words (hereafter referred to as the Stroke 100) were extracted. Using data from 2014 to 2019, a random forest analysis was carried out using the age-adjusted mortality from stroke in 47 prefectures as the outcome variable and the standardized retrieval numbers of the Stroke 100 words in the log data of Yahoo! JAPAN Search as predictive variables. Regression analysis was performed using a generalized linear mixed model (GLMM) with the number of standardized searches for Stroke 100 words with high importance scores in the random forest model as the predictive variable. In the GLMM, the aging rate and data year were used as control variables, and the random slope of data year and random intercept were calculated by prefecture. Results The mean age-adjusted mortality from stroke was 28.07 (SD 4.55) deaths per 100,000 for all prefectures in all data years. The accuracy score of the random forest analysis was 89.94%, the average error was 2.79 degrees, and the mean squared error was 13.57 degrees. The following 9 variables with high importance scores in the random forest analysis were selected as predictive variables for the regression analysis: male, age, hospitalization, enforcement, progress, stroke, abnormal, use, and change. As a result of the regression analysis with GLMM, the standardized partial regression coefficients (β) and 95% confidence intervals showed that the following internet search terms were significantly associated with age-adjusted mortality from stroke: male (β=−5.83, 95% CI −8.67 to −3.29), age (β=−5.83, 95% CI −8.67 to −3.29), hospitalization (β=−5.83, 95% CI −8.67 to −3.29), and abnormal (β=3.83, 95% CI 1.14 to 6.56). Conclusions Stroke-related search behavior was associated with age-adjusted mortality from stroke in each prefecture in Japan. Query terms that were strongly associated with age-adjusted mortality rates of stroke suggested the possibility that individual characteristics, such as sex and age, have an impact on stroke-associated mortality and that it is important to receive medical care early after stroke onset. Further studies on the criteria and timing of alerting are needed by monitoring information-seeking behavior to identify queries that are strongly associated with stroke mortality.
Books on the topic "Adjusted mean numbers"
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Borja, Melissa. Migration and Modern Religious Pluralism. Edited by Paul Harvey and Kathryn Gin Lum. Oxford University Press, 2018. http://dx.doi.org/10.1093/oxfordhb/9780190221171.013.6.
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In the second half of the twentieth century, the United States enacted major changes in immigration policy that, in turn, produced dramatic changes in the ethno-racial and religious makeup of the American population. Especially after 1965, unprecedented numbers of Muslims, Hindus, Buddhists, animists, and ancestor-worshippers migrated to the United States, as did Asian, African, and Latino Christians who introduced new cultural diversity to American churches. During the same period, ideology of pluralism gained currency, and Americans revised their understanding of what it means to pursue harmonious relations across lines of religious difference. Ideas and practices of pluralism not only adjusted to these new conditions but also powerfully reshaped both secular and religious institutions in the United States in the process. However, despite the public embrace of pluralism, recent developments have made clear that aspirations of religious freedom and interfaith harmony have been more difficult to put into practice than many people have expected.
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Kamali, Mohammad Hashim. Shariah and the Halal Industry. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197538616.001.0001.
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This book expounds the rules of shariah relating to lawful and unlawful in food and beverages, and how they are manifested in halal industry practices and markets. In addition to a concise presentation of the scholastic treatment of the rules of halal and its opposite, the haram in shariah, the book also familiarizes the reader with how they were formed and what are the basic tools by which the rules of shariah may be adjusted through fresh interpretation (i.e., ijtihad) so that they may respond to new developments. Part I, “Shariah Perspectives,” occupies about two-thirds of the book, whereas the other two parts cover halal developments in Malaysia and a select number of other countries. There is also a review of the roles of culture and what may be customarily considered as harmful and unclean, as well as a brief history of meat eating.
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Cloyes, Kristin G., and Kathryn A. Burns. Aging prisoners and the provision of correctional mental health. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199360574.003.0057.
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The incarcerated population is aging. Newly arrested individuals and those aging in prison from mandatory lengthy sentences contribute to this dynamic. Screening for impairment and developing effective interventions and treatment for the incarcerated elderly has become a substantial challenge. The number of U.S. prisoners aged 65 or older grew at 94 times the rate of the overall prison population between 2007-2012. In 2011 7.9% of state and federal inmates were 55 or older; there were 26,700 over age 65. The number of inmates over 60 years of age in U.K. prisons increased by 120% between 2002 and 2013. Similar growth trends are reported in Sweden, Japan, Australia and Canada. This growth is complicated by the fact that chronological age does not necessarily match ‘health age’ or health status in prison. As a result, many prison systems have adjusted their definition of ‘elderly’ down to age 55 (and some as low as 40) to reflect the relatively poor health status of aging men and women in their institutions. Typical correctional health services in prisons across the U.S. are already hard-pressed to keep up with increasing demands for care of aging inmates. The responsibility to provide adequate health services for prisoners remains despite shrinking local, county, state and federal budgets. This chapter reviews the current status and prevalence of the incarcerated elderly, and presents best practice models for their care.
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Faucher, Philippe. Leviathan Captured Neoliberalism as Solution and Problem in Brazil. Edited by Edmund Amann, Carlos R. Azzoni, and Werner Baer. Oxford University Press, 2018. http://dx.doi.org/10.1093/oxfordhb/9780190499983.013.7.
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This chapter begins with an overview of the nature of neoliberalism. As markets evolved and globalization made progress, governments introduced reforms meant to adjust policies and regulations to a more open and competitive environment and reduce the relative weight and role of the state. Policies such as privatization and trade liberalization were introduced in Brazil shortly after a civilian, Fernando Collor de Melo (1990–1992), was elected president. But the neoliberal agenda was relegated to second place as all energy was turned toward the fight against inflation and the debt crisis. After a first term dedicated to consolidate public finances, President Cardoso (1995–2002) introduced a number of “market-oriented” reforms aimed at flexibility and efficiency. Under President Lula (2003–2010), social programs were improved, transfers were increased, and the minimum wage was raised. Since 2009, a recession has threatened the joint imperatives of forced development and social justice.
Book chapters on the topic "Adjusted mean numbers"
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Kamer, Angela R., Douglas E. Morse, Poul Holm-Pedersen, Erik L. Mortensen, and Kirsten Avlund. "Periodontal Inflammation in Relation to Cognitive Function in an Older Adult Danish Population." In Advances in Alzheimer’s Disease. IOS Press, 2022. http://dx.doi.org/10.3233/aiad220037.
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Inflammation plays a significant role in Alzheimer’s disease (AD) pathogenesis. Studies have shown that systemic, peripheral infections affect AD patients. Cognitive dysfunction is a consistent finding in AD and periodontal disease is a chronic, peripheral infection often resulting in tooth loss. We hypothesized that older adults with periodontal inflammation (PI) or many missing teeth would show impaired cognition compared to subjects without PI or with few missing teeth, and among subjects with PI, those with many missing teeth would show impaired cognition compared to those with few missing teeth. The effect of PI/tooth loss on cognitive function [measured by Digit Symbol (DST) and Block Design (BDT) tests] was assessed in 70-year old Danish subjects. We found: 1) subjects with PI obtained lower mean DST scores compared to subjects without PI (p < 0.05); 2) subjects with many missing teeth had lower mean DST and BDT scores compared to subjects with few missing teeth (p < 0.05); 3) the association of PI with DST and BDT scores was dependant on the number of missing teeth (interaction: p = 0.03 and p = 0.06); and 4) education and previous cognitive scores (age 50) were important covariates. Subjects with PI had significantly lower adjusted mean DST scores compared to subjects without PI. However for adjusted BDT, the significance held only for subjects with few missing teeth. No difference in the adjusted DST and BDT scores was seen between subjects with many missing teeth compared to those with few missing teeth. These results support the hypothesis that PI may affect cognition.
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Tejasri, P. N. S., K. Anusha, K. Sangeet Kumar, Nukella Venkatesh, and Y. Yamini Devi. "Interference-Normalized Least Mean Square Algorithm: A Comparative Study." In Advances in Transdisciplinary Engineering. IOS Press, 2023. http://dx.doi.org/10.3233/atde221241.
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A general least mean square interference technique is provided for effective adaptive filtering. The gradient adaptive learning rate methodology can now handle non-stationary data with the Interference normalised least mean square technique. Because of issues like duplicate talk and echo route variance, echo cancellation is made more difficult because the learning rate must be adjusted. Frequency domain echo cancelers learn at different rates, which can be altered in a novel fashion. Normalized least mean square method normalised learning rate under noise is used to calculate an optimal learning rate. This double-talk detection technique exceeds the competition while also being incredibly simple to implement. A number of least mean square (LMS)-type algorithms have been investigated in place of their recursive equivalents of IVM or TLS/DLS, which involve large calculations. As a result of these findings, we provide a consistent LMS type technique for the data least squares estimate problem. This unique approach normalizes step size and estimates the variance of the noise in a heuristic manner using the geometry of the mean squared error function, resulting in rapid convergence and robustness against environmental noise.
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Santos, Paula Gomes dos, and Carla Martinho. "Sustainability Assessment of Portuguese Local Governments (2009 to 2017)." In Advances in Public Policy and Administration, 80–104. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-7820-8.ch004.
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Public governance must ensure financial sustainability. This investigation aims to assess Portuguese local governments financial sustainability as the ability to service the upcoming obligations in commercial transactions (under the Late Payment Directive framework) and to study if accounting information enables public local governance with greater transparency and accountability about their financial sustainability. The study will focus on the 308 Portuguese local governments from 2009 to 2017. The number of local governments with average payment periods (PMPs) within 30 days had an increasing tendency. However, their adjusted average payment periods greatly exceed the 30 days, which means limited financial sustainability. In 2017, only 29% of the local governments have an adjusted PMP within 30 days against the 63% if it is used the officials PMPs. Therefore, accounting information does not enable public governance with greater transparency and accountability about Portuguese local government financial sustainability.
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Wahlberg, Ayo. "Mobilizing Sperm Donors." In Good Quality. University of California Press, 2018. http://dx.doi.org/10.1525/california/9780520297777.003.0005.
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A limit of five women’s pregnancies per donor in China has spawned a cyclic and “high throughput” style of sperm banking, which requires getting great numbers of potential donors to show up at the sperm bank for screening. Chapter 4 argues that it is the relatively unexposed and virile vitality of bioavailable male populations on university campuses that is sought after by sperm banks. In this cyclic tissue economy, sperm banks persistently exhaust the willingness of a given cohort of young men on university campuses only to resume once “fresh” cohorts have arrived. Novel strategies of recruitment have been devised and adjusted to address the chronic shortage of donors in China.
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Blow, David. "Structural refinement." In Outline of Crystallography for Biologists. Oxford University Press, 2002. http://dx.doi.org/10.1093/oso/9780198510512.003.0017.
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At this stage, we have derived a model from an electron-density map and have interpreted it as closely as we can in terms of molecular structure. Provided the job has been done well enough, the next task of improving that interpretation can be left to computational procedures known as structural refinement. If further uninterpreted features of the structure are revealed, it will be necessary to go back to the methods of Chapter 11 to improve the interpretation. The purpose of structural refinement is to adjust a structure to give the best possible fit to the crystallographic observations. The intensities of the Bragg reflections constitute the observations, and the various quantities that define the structure are adjusted to give the best fit. Box 12.1 gives an outline of what is meant by refinement of quantities to fit observations. In structural refinement, a measure of the discrepancies between the calculated X-ray scattering by the model structure and the observed intensities is defined: this is called the refinement parameter. The purpose of the refinement procedure is to alter the model to give the lowest possible refinement parameter. Box 12.1 uses a simple example to bring out some important general points: 1. My model will be specified by a number of variables. In a diffraction experiment, they are usually the coordinates and B factor of every atom. If the number of observed quantities is less than the number of variables, the results can have no validity. 2. If the number of observations equals the number of variables, a perfect fit can be obtained, irrespective of the accuracy of the observations or of the model. (This is true of so-called linear problems, and approximately so in non-linear cases.) 3. If the number of observations exceeds the number of variables by only a small quantity, the estimate of the reliability of the model is questionable. In practice, refinement procedures can only work when there is a sufficient number of observations which are sufficiently accurate. Also, the model must already be good enough to make the refinement procedure meaningful.
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Aikhenvald, Alexandra Y. "The ways of speaking and the means of knowing." In The Integration of Language and Society, 175–214. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780192845924.003.0006.
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Tariana is an Arawak language spoken by about a hundred people in the Vaupés River Basin linguistic area in Brazil. A number of grammatical features reflect specific traits of the ways the people live. Manipulating genders correlates with the status of women: a respected and knowledgeable woman can be referred to with nonfeminine gender, as if 'promoted' to manhood. Classifiers occur in multiple environments, including number words, demonstratives, adjectives, and possessive constructions. Classifiers with specific semantics reflect riverine environment, taxonomic categorization of plants, and means of subsistence. Five evidentials obligatorily mark information source. Their use correlates with the requirement to be precise in stating how one knows things, and in the types of access to information. Nonvisual evidentials are used in talking about the feelings, physical states and uncontrolled actions of oneself and one’s core family members. Speakers are aware of the meanings and the uses of evidential, and are prepared to discuss and explain them. Evidentials are sensitive to technological changes, as they adjust to new ways of acquiring information. Evidentials and classifiers are shared across the multilingual area of the Vaupés River Basin. Contact between speakers of adjacent languages appear to have shaped the speakers’ interaction patterns and the associated language features. In contrast, gender manipulation is being lost by younger speakers, as the status of women undergoes transformations.
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Ghosal, Abhijit. "Influence of Abiotic Factors on Whitefly Population Abundance in Cotton." In Cotton [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.103006.
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Whitefly started to infest cotton soon after planting in favourable weather condition. During November planting mean whitefly population were highest (6.9 whiteflies per 3 leaves) and slowly declined in successive planting dates. It was found that number of population were above ETL during the month of December, January and February. Maximum population were recorded in the month of February depending on the growth stage of the crop. Maximum temperature beyond 35°C, minimum temperature below 8°C and moderate to high rainfall was very much detrimental to successful population build up. The most favourable temperature was ranged in respect of min. temperature and max. temperature was ranged 12–30°C. Simple regression value reflects whitefly population were influenced to the tune of 70.8%, 69.5%, 35.3% and 75.4% in November, December, January and February month respectively. Whitefly population were negatively correlated with temperature (max. and min.), rainfall and relative humidity (max. and min.); while, positively correlated with sunshine hours, but during November planting relative humidity (max. and min.) was positively correlated and sunshine hours were negatively correlated. Thus adjustment of planting dates may be adjusted or suitable plant protection measure may be introduced according to the weather forecast.
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Weber-Lewerenz, Bianca. "Creating the Foundation for Diversity, Inclusion, and Sustainable Digital Innovations by Education and Training." In Impact of Women's Empowerment on SDGs in the Digital Era, 276–304. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-3637-0.ch012.
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Knowledge is the greatest raw material. To build a secure future, you need knowledge, skills, to network, and to get involved in the new. Digitization with the technological and social challenges requires a rethinking and adjustment of professional qualifications at the same time. More than half of 70% of the open AI positions in companies are currently unfilled. This high number describes the dilemma and the challenges for the teaching and training of tomorrow. Are we ready for the technological challenges of tomorrow? There is significantly high potential for diverse teams staffing the STEM fields with more female specialists and fully using specialist knowledge and personal qualifications of men and women to ensure gender-independent decision-making structures in human-technology interaction and use diversity as key for reaching sustainable goals and set milestones in the digital era. The foundation for diversity, inclusion, and sustainable digital innovations can only be ensured by adjusted education and academic training.
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Shah-Mohammadi, Fatemeh, Wanting Cui, Keren Bachi, Yasmin Hurd, and Joseph Finkelstein. "Latent COVID-19 Clusters in Patients with Opioid Misuse." In Studies in Health Technology and Informatics. IOS Press, 2022. http://dx.doi.org/10.3233/shti210874.
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The goal of this paper is to apply unsupervised machine learning techniques in order to discover latent clusters in patients who have opioid misuse and also undergone COVID-19 testing. Target dataset has been constructed based on COVID-19 testing results at Mount Sinai Health System and opioid treatment program (OTP) information from New York State Office of Addiction Service and Support (OASAS). The dataset was preprocessed using factor analysis for mixed data (FAMD) method and then K-means algorithm along with elbow method were used to determine the number of optimal clusters. Four patient clusters were identified among which the fourth cluster constituted the maximum percentage of positive COVID-19 test results (20%). Compared to the other clusters, this cluster has the highest percentage of African Americans. This cluster has also the highest mortality rate (16.52%), hospitalization rate after receiving the COVID-19 test result (72.17%, use of ventilator (7.83%) and ICU admission rate (47.83%). In addition, this cluster has the highest percentage of patients with at least one chronic disease (99.13%) and age-adjusted comorbidity score more than 1 (83.48%). Longer participation in OTP was associated with the highest morbidity and mortality from COVID-19.
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Muir, Rory. "Conclusion." In Gentlemen of Uncertain Fortune, 311–24. Yale University Press, 2019. http://dx.doi.org/10.12987/yale/9780300244311.003.0013.
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This concluding chapter offers reflections on all the career options discussed in the previous chapters. It is rather surprising that the large number of well-educated young men, brought up in comfort if not affluence, only to be faced with such limited and bleak prospects, did not develop a greater sense of collective identity and grievance, and turn to radical politics to remedy the flagrant injustices of a society that could treat them in this manner. Presumably they retained a sufficiently strong sense of belonging to the privileged classes and were not sufficiently alienated to want to upend the applecart, but revolutions have been fuelled by less reasonable complaints, and Britain in the years immediately after Waterloo was seething with discontent. At that time, however, most half-pay officers and other young gentlemen in a similar position probably imagined that some fresh war would soon break out, or some other opportunity would arise, that would rescue them from the doldrums and carry them forward in their career. Like the proverbial frog boiling in water, their disillusionment was gradual and they slowly adjusted to their altered circumstances and diminished prospects.
Conference papers on the topic "Adjusted mean numbers"
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Li, Zhenzhong, Jinjia Wei, and Bo Yu. "Numerical Simulations of Particle-Laden Flow Based on Given Friction Reynolds Number and Mean Reynolds Number Respectively." In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21332.
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Multiphase flow with particles covers a wide spectrum of flow conditions in natural world and industrial applications. The experiments and the direct numerical simulation have become the most popular means to study the dilute particle-laden flow in the last two decades. In the experimental study, the mean Reynolds number is often adjusted to the value of single-phase flow for each set of particle conditions. However, the friction Reynolds number usually keeps invariable in the direct numerical simulation of the particle-laden flows for convenience. In this study the effect of the difference between given mean Reynolds number and friction Reynolds number was investigated. Two simulations were performed for each set of particle parameters, and the mean Reynolds number and friction Reynolds number were kept invariant respectively. From the results it can be found that the turbulence intensity and the dimensionless velocities are larger when keeping the friction Reynolds constant. And the results calculated from the cases of keeping the mean Reynolds number invariable agree with the experiment results better. In addition, the particle distribution along the wall-normal coordinate was found to be unchanged between two simulation conditions. As a suggestion, keeping the same mean Reynolds number in the direct numerical simulation of particle-laden flow is more appropriate.
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Atayılmaz, S¸evket O¨zgu¨r, Hakan Demir, O¨zden Ag˘ra, and I˙smail Teke. "An Experimental Apparatus to Investigate Natural Convection Heat Transfer From a Vertical Array of Isothermal Horizontal Cylinders." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38634.
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Steady natural convection heat transfer from vertical array of equally-spaced isothermal horizontal cylinders has been investigated experimentally and numerically. Experimental study was carried out at different ambient temperatures in a conditioned room which can be maintained at a stable required value and inside a sufficiently designed test cabin. The ambient and cylinders’ surface temperatures varied 20°C to 30°C and 30°C to 60°C respectively. The experimental apparatus was designed to adjust different operating parameters such as number of cylinders, cylinders’ surface temperatures, distance between the cylinders and environmental temperature. Each cylinder surface temperature can be accurately adjusted to the desired temperature by means of specially designed measurement and control system. Copper test cylinders have length of 1 m and outer diameter of 4.8 mm. The uncertainty analysis method proposed by Kline and McClintock was used and explained elaborately. Detailed information and algorithm of numerical method are given to ease the understanding of the numerical part of the study. The problem was solved numerically by means of a CFD program in 2D. Average Nusselt numbers are given based on the experimental data for single and each two horizontal cylinders. Heat transfer rates obtained from experimental and numerical studies for upper and lower cylinders were compared with each other. The deviation of experimental and numerical heat transfer rates are in a good agreement and stay in the range ± 20%. It is seen that heat transfer from the lower cylinder is close to the single cylinder case. However, higher temperature of the passing air reduces the heat transfer from the upper cylinder for S/D = 2.
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Hørte, Torfinn, Limin Yang, and Siril Okkenhaug. "Analysis of Chain Fatigue Test Data for New and Used Mooring Chains." In ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-81465.
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Abstract DNV is currently running a Joint Industry Project, “NorMoor JIP”, which is now approaching the end of phase 3. In this phase the fatigue limit state of mooring lines with studless chains for permanent units has got the main attention, where a new design method and safety factors for fatigue has been calibrated using structural reliability analyses. Phases 1 and 2 was covering the ultimate and accidental limit states respectively. The JIP has participants from energy companies, engineering companies, rig-owners, manufacturers and marine authorities. It is a global study covering Gulf of Mexico, Northern Europe and Brazil waters. The focus in the present paper is on the chain fatigue strength. NorMoor JIP has obtained access to a large number of tension-tension fatigue test data for studless chain of various sizes, both new and used. The tests are carried out at different mean load levels and load ranges and provide a unique opportunity to study how the fatigue strength is influenced by mean load and degree of corrosion. Considerations have also been made to obtain consistency in the test results for tests with different number of links in the test sample. The main result from analyzing the test data is an S-N based fatigue strength formulation, where the nominal stress range versus number of cycles to failure is given as a function of nominal mean stress and corrosion category. The data support keeping the slope of the S-N curve at m = 3, hence, logA is fitted to the data as a function of mean stress and corrosion category. The overall fit to all data has been checked for sub-groups of data such as new chain, used chain of different corrosion category, different chain diameter and different mean load. Prior to performing the fit, the test data were adjusted to represent number of cycles to failure for the weakest out of 6 links. This adjustment was implemented for tests with number of links different from 6 and is based on extreme value statistics. For corrosion, seven corrosion categories are used, based on guidance provided by the LifeMoor project at Sintef/NTNU. More work is needed to more precisely specify the categories. The formulation proposed uses nominal stress based on the reference diameter for new chain. A series of 3 papers is published at the OMAE2022 documenting the work done in the NorMoor Phase 3 on the fatigue limit state of mooring lines. Additional to the strength formulation from the present paper, the importance sampling method, developed in NorMoor and presented in OMAE2022-81441, is used in the structural reliability analysis and code calibration presented in OMAE2022-81463.
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Yang, Tachung, and Kai-Shang Lin. "Identification of Speed-Dependent Bearing Coefficients From Unbalance Responses in One Test Run." In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59196.
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It is well known that the bearing coefficients of oil film journal bearings are speed dependent. From the derivation of Tiwari et al., the numbers of unknown coefficients are twice the number of the equations relating to unbalance responses. That means at least two unbalance test runs are necessary to solve the bearing coefficients, no matter how many measurements are made, and the rotating machines have to stop once to adjust the unbalance configurations for the second test run. In this study, second order polynomials are assumed to fit the bearing coefficients in a specific speed range, and unbalance measurements are made at several rotating speeds in that speed range to solve for the polynomial coefficients. The advantages of this approach are that it fulfills the conditions of speed-dependent coefficients, the bearing coefficients can be obtained without stopping the machines, and on-line identification of bearing coefficients can be achieved. Noise reduction and interpolation for the bearing coefficients at other speeds can also be easily attained.
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Theis, Anika, Thomas Reviol, and Martin Böhle. "Analysis of the Losses in an Axial Fan With Small Blade Aspect Ratios Using CFD-Technique and Laser Doppler Anemometry." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14283.
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Abstract In this contribution an axial flow fan is designed with four different blade aspect ratios. These four blade aspect ratios are obtained by using four different numbers of blades. The blade aspect ratios are varied between 0.2 and 0.6. For this investigation the thickness ratio distribution and the spacing ratio are kept constant in the design process for all four blade aspect ratios. This means, the blade thickness, the spacing and the blade chord are adjusted for every blade aspect ratio. Analysing low aspect ratios is challenging. Previous literature treating compressors suggests that at low aspect ratio the secondary losses and the freestream losses combine, making it difficult to separate the profile loss from the secondary flow losses. An approach to quantifying profile losses at the midspan of the blades for blade aspect ratios lower than 0.5, 2D simulations at the midspan are carried out for supplementary examination. The Reynolds number of all investigations is related to the chord length of each blade. It is varied from 2.38 × 105 to 7.13 × 105. During the survey, the same stator with a constant blade aspect ratio as well as a constant spacing ratio is used. In this contribution, LDA is applied as experimental method. Transient numerical simulations are performed for a full 3D simulation model to obtain a detailed view into the machine. Because of the low Reynolds numbers, the k-ω-SST transition model with the intermittency function is applied. With both methods, the flow is investigated on different planes inside the fan. The velocity distribution on the planes is analysed and compared to the transient simulation results. In the boundary layer, the velocity is resolved as well using the laser technique.
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Canepa, Roberto, Stefano Piola, Marco Pirotta, Andrea Silingardi, Federico Bonzani, and Carlo Carcasci. "ALGOR Gas Turbine Performance Modular Tool: Map Based Modules Development." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-57683.
Full textAbstract:
Commercially available or in-house developed performance tools, mostly based on heat and mass balance, are nowadays widespread among Universities, consulting companies and utilities. Generally these software are based on main gas turbine measurable information and, yet accurate on global performance estimation, are limited in the level of insight on component performance they can provide and also in the range of analysis, generally limited to engine possible operating points. On the other hand, the tools adopted by OEMs generally differ for components (compressor, turbine and combustor) and secondary air system details. In ASEN experience ALGOR heat and mass balance software is used as a platform for system integrations between each disciplines by means of a modular structure in which a large number of modules, chosen from the available library, are freely connected allowing to potentially analyze any gas turbine engine configuration. This paper describes the structure and the implementation of latest ALGOR updates, developed by ASEN and University of Florence, aimed at creating new map based modules for compressor and secondary air system. With this approach, component performance coming from field data can be continuously adopted to refine the reliability of calculation. Furthermore, nonlinear phenomena occurring in stationary and rotating cooling passages can be evaluated only with devoted calculation tools, which output can be conveniently translated in flow functions maps. Thanks to ALGOR modular structure, with these newly available (map-interpolating) modules, additional levels of analysis are allowed, ranging from “cycle deck” map-matching level, to mixed modelling in which map based modules are linked with 1D mean line analysis modules. Moreover their use can be also foreseen in ASEN conceptual design approach in which just map reference points are adjusted to reflect expected technological leaps required by engine upgrade.
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Oghbaei, Mojtaba, Kurt S. Anderson, and John A. Evans. "A State-Time Formulation for Multibody Systems Dynamics Simulation: Part II — Parallel Implementation." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84473.
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This paper outlines the parallel implementation of a newly developed multibody system dynamics formulation. The methodology provides the means for the dynamic simulation to be parallelized temporally as well as spatially which will allow better exploitation of anticipated massively parallel computing resources. This will have three advantages: First, the system of equations may now be coarse grain parallelized to a far greater degree allowing an increased number of processors to be effectively utilized. Secondly, this will significantly reduce the fraction of serial operations and thus should increase speedup (reduced turn-around). Finally, the method allows temporal scale of each variable to be adjusted independently and as such offer considerable advantage for the efficient and accurate modeling and simulation of multiscale behaviors. These gains can be accomplished by discretizing a special form of the equations of motion in both temporal and spatial domains. Examples are provided to clarify the application of this scheme with particular attention on time domain parallelization.
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Leimeister, Mareike, Athanasios Kolios, Maurizio Collu, and Philipp Thomas. "Larger MW-Class Floater Designs Without Upscaling?: A Direct Optimization Approach." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-95210.
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Abstract The trend towards larger offshore wind turbines (WTs) implies the need for bigger support structures. These are commonly derived from existing structures through upscaling and subsequent optimization. To reduce the number of design steps, this work proposes a direct optimization approach, by which means a support structure for a larger WT is obtained through an automated optimization procedure based on a smaller existing system. Due to the suitability of floating platforms for large MW-class WTs, this study is based on the OC3 spar-buoy designed for the NREL 5 MW WT. Using a Python-Modelica framework, developed at Fraunhofer IWES, the spar-buoy geometry is adjusted through iterative optimization steps to finally support a 7.5 MW WT. The optimization procedure focuses on the global system performance in a design-relevant load case. This study shows that larger support structures, appropriate to meet the objective of the hydrodynamic system behavior, can be obtained through automated optimization of existing designs without the intermediate step of upscaling.
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Pinilla, V., J. P. Solano, and G. Paniagua. "Method and Measurement of Adiabatic Wall Temperature Downstream of a High Pressure Turbine Using Thin-Film Sensors." In ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-46556.
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During engine development, heat loads in the turbomachinery are analyzed based on theoretical and numerical estimates together with correlations. Accurate models of the convective fluxes are vital to assess the thermo-mechanical integrity. This paper reports an experimental heat transfer research in a 1.5 turbine stage, the researched model is a the structural vane of a multi-splittered low pressure vane located downstream of a high pressure turbine stage. This concept is envisioned for ultra-high bypass-ratio aero-engines with a swan-neck diffuser between the high-pressure turbine and the low-pressure turbine. Measurements were performed in the large compression tube facility of the von Karman Institute, at representative conditions of modern aero-engines. Double-layered thin film gauges were employed for the measurement of the time-dependent temperature distribution around the airfoil. The initial temperature of the structural vane was adjusted using a heating system. The experimental procedure has allowed the determination of the time-mean and unsteady adiabatic wall temperature. Hence this technique allows the determination of the non-dimensional Nusselt number and proper scaling of the surface temperature to engine conditions. Furthermore, the analysis of the unsteady data reveals the contribution of the temperature fluctuations to the unsteady heat fluxes.
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So, R. M. C., Y. Liu, and Y. G. Lai. "Mesh Shape Preservation for Flow-Induced Vibration Problems." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39041.
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This paper describes a numerical technique that can prevent the mesh from severe distortion in flow-induced vibration calculations. An orthogonal transformed space that is related to the physical space through a Laplacian equation is introduced. At each time step, the mesh may deform significantly in the physical space due to structural vibration, but the mesh nodal value in the transformed space remains constant. As long as the coordinates in the physical space can be adjusted to render the transformed space independent of time, the mesh shape in the physical space is preserved, even though the mesh area may enlarge or reduce significantly. For simplicity, a two-dimensional flow-induced vibration problem is used to illustrate this method. Two side-by-side elastic cylinders in a cross flow are considered. The Reynolds number is fixed at 200 so that a laminar wake is still available. The mass ratio is chosen to be small so that large displacements of the cylinders can be realized. The predictions with and without mesh preservation are compared. The difference between the two results could be as large as 25% in the prediction of the mean transverse displacements of the cylinders. The method could be extended to three-dimensional flow-induced vibration problems without much difficulty.
Reports on the topic "Adjusted mean numbers"
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Datta, Sandip, and Geeta Gandhi Kingdon. The Myth and Reality of Teacher Shortage in India: An Investigation Using 2019-20 Data. Research on Improving Systems of Education (RISE), December 2021. http://dx.doi.org/10.35489/bsg-rise-wp_2020/072.
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This paper examines the widespread perception in India that the country has an acute teacher shortage of about one million teachers in public elementary schools, a view repeated in India’s National Education Policy 2020. Using official DISE data, we show that teacher vacancies cannot be equated with teacher shortages: while the number of teacher vacancies (in teacher-deficit schools) is 766,487, the number of teacher surpluses (in surplus-teacher schools) is 520,141, giving a net deficit of only 246,346 teachers in the country. Secondly, removing estimated fake student numbers from enrolment data greatly reduces the required number of teachers and raises the number of surplus teachers, converting the net deficit of 246,346 teachers into an estimated net surplus of 98,371 teachers. Thirdly, if we both remove estimated fake enrolment and also make a hypothetical change to the teacher allocation rule to adjust for the phenomenon of emptying public schools (which has slashed the national median size of public schools to a mere 63 students, and rendered many schools ‘tiny’), the estimated net teacher surplus rises to 239,800 teachers. Fourthly, we show that if government does fresh recruitment to fill the supposed approximately one-million vacancies as promised in National Education Policy 2020, the already modest national mean pupil-teacher-ratio of 25.1 would fall to 19.9, at a permanently increased fiscal cost of nearly Rupees 637 billion (USD 8.7 billion) per year in 2019-20 prices, which is higher than the individual GDPs of 50 countries that year. The paper highlights the major efficiencies that can result from evidence-based policy on minimum viable school-size, teacher allocation norms, permissible maximum pupil teacher ratios, and teacher deployment.
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Zilberman, Mark. Methods to Test the “Dimming Effect” Produced by a Decrease in the Number of Photons Received from Receding Light Sources. Intellectual Archive, June 2021. http://dx.doi.org/10.32370/ia_2021_06_22.
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The hypothetical “Dimming effect” describes the change of the number of photons arriving from a receding light source per unit of time. In non-relativistic systems,the "Dimming effect" occurs due to the fact that as light sources move away, the distance between the emitter and the receiver constantly increases, and the photons always take longer to reach the receiver. This reduces the number of photons received per time unit compared to the number of emitted photons per time unit. Negligible for speeds incomparable with the speed of light c, the "Dimming effect" can be very significant for speeds above 0.1c. “Dimming effect” can possibly be tested in a physics labor-atory using a moving light source (or mirror) and photon counters located in the travel direction and in opposite direction. It can possibly also be tested utilizing the orbital movement of the Earth around the Sun. If confirmed, “Dimming effect” would allow astronomers to adjust values of the "Standard Candles", which are critical in cosmological models. Absence of “Dimming effect” will mean that the number of photons arriving per time unit does not depend on the relative speed of light source and observer,which is not so apparent
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Zilberman, Mark. Methods to Test the “Dimming Effect” Produced by a Decrease in the Number of Photons Received from Receding Light Sources. Intellectual Archive, November 2020. http://dx.doi.org/10.32370/iaj.2437.
Full textAbstract:
The hypothetical “Dimming Effect” describes the change of the number of photons arriving from a moving light source per unit of time. In non-relativistic systems, the “Dimming effect” may occur due to the growing distance of light sources moving away from the receiver. This means that due to the growing distance, the photons continuously require more time to reach the receiver, which reduces the number of received photons per time unit compared to the number of emitted photons. Understandably, the proposed “Dimming effect” must be tested (confirmed or rejected) through observations. a. This article provides the formula for the calculation of “Dimming effect” values using the redshift parameter Z widely used in astronomy. b. The “Dimming effect” can possibly be detected utilizing the orbital movement of the Earth around the Sun. In accordance to the “Dimming effect”, observers on Earth will view 1.0001 more photons per time unit emitted by stars located near the ecliptic plane in the direction of the Earth orbiting the Sun. And, in contrast, observers will view only 0.9999 photons per time unit emitted by stars located near the ecliptic plane in the direction opposite to the Earth orbiting the Sun. Calculating precise measurements of the same stars within a 6-month period can possibly detect this difference. These changes in brightness are not only for specific stars, as the change in brightness takes place for all stars near the ecliptic in the direction of the Earth’s orbit around the Sun and in the opposite direction. c. The “Dimming effect” can possibly be detected in a physics laboratory using a moving light source (or mirror) and photon counters located in the direction of travel and in the opposite direction. d. In theory, Dilation of time can also be used for testing the existence of the “Dimming effect.” However, in experiments on Earth this effect appears in only the 14th digit after the decimal point and testing does not appear to be feasible. e. Why is it important to test the “Dimming effect?” If confirmed, it would allow astronomers to adjust values of "Standard Candles" used in astronomy. Since “Standard Candles” are critical in various cosmological models, the “Dimming effect” can correct models and/or reveal and support new models. If it is proved that the “Dimming effect” does not exist, it will mean that the number of photons arriving per unit of time does not depend on the speed of the light source and observer, which is not so apparent.
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Peitz, David. White-tailed deer monitoring at Wilson’s Creek National Battlefield, Missouri: 2005–2022 trend report. Edited by Tani Hubbard. National Park Service, November 2022. http://dx.doi.org/10.36967/2295163.
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The Heartland Inventory and Monitoring Network has monitored white-tailed deer over an 18-year period (2005–2022) within a defined survey area of Wilson’s Creek National Battlefield, documenting both a rapid decline and recovery in the population. The rapid die-off was the result of a region-wide hemorrhagic disease outbreak reported by the Missouri Department of Conservation that started in the fall of 2005, six months after we initiated deer monitoring. Although declines occurred 2005 to 2007, 2016 to 2017, and 2019 to 2022, the deer population still increased on average by 7.2% annually. The number of deer in the survey area ranged from a low of 14.9 ± 10.1 (mean ± 95% CI) individuals/km2 in 2007 to a high of 167.2 ± 57.4 individuals/km2 in 2016. The visible area surveyed each year varied between 0.7 and 1.1 km2 (coefficient of variation = 14.1%). Annual deer harvest data in the area nearby Wilson’s Creek National Battlefield exhibit similar trends to our annual adjusted counts suggesting that factors other than hunting maybe driving annual changes in deer population size in most years. However, these trends were not significantly correlated (r = 0.34, p = 0.33), so this relationship is only speculative. Overall, the increasing number of deer pose several problems for Wilson’s Creek National Battlefield. First, increasing deer populations add a level of complexity to implementing Wilson’s Creek National Battlefield Cultural Landscape Report recommendations. Deer preferentially browse native vegetation over exotic vegetation, promoting the spread of exotic species, and the success of tree plantings can be curtailed by heavy deer browsing. Second, controlling deer-related disease, some of which can affect domestic livestock and human health in and around the park, becomes increasingly harder as the deer population increases. Third, as additional ancillary data suggests, the largely unreported and costly deer-vehicle collisions in and around Wilson’s Creek National Battlefield have the potential to increase when there are more deer.
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Peitz, David, and Naomi Reibold. White-tailed deer monitoring at Arkansas Post National Memorial, Arkansas: 2005–2020 trend report. Edited by Tani Hubbard. National Park Service, April 2021. http://dx.doi.org/10.36967/nrr-2285087.
Full textAbstract:
From 16 years (2005–2020) of monitoring trends in white-tailed deer within a defined survey area of Arkansas Post National Memorial, we have been able to demonstrate both population declines and recoveries. The adjusted count of deer had a seven-fold increase between 2007 and 2011 following a two-year decline and a three-fold increase between 2017 and 2019 following a six-year decline. Overall, the deer population has declined slightly, averaging a 0.5% reduction in herd size annually. The number of deer in the survey area ranged from 16.77 ± 21.26 (mean + 95% CI) individuals/km2 in 2007 to 118.95 ± 39.03 individuals/km2 in 2011. The amount of visible area surveyed each year varied between 0.25 and 0.47 km2 (coefficient of variation = 16.47%). If the white-tailed deer population becomes too large, this poses several problems for Arkansas Post National Memorial. First, it adds a level of complexity to implementing active natural resource management critical to preventing the cultural landscapes of Arkansas Post National Memorial from changing into something that has little resemblance to the historical character of the park. Deer deferentially browse native vegetation over exotic vegetation, thus promoting the spread of exotic species, and the success of tree planting can be curtailed by heavy deer browsing. Second, controlling deer related disease, some of which can affect domestic livestock and human health in and around the park, becomes increasingly difficult when there are more deer. Third, as additional ancillary data suggests, the largely unreported and costly deer-vehicle collisions in and around Arkansas Post National Memorial have the potential to increase if the deer populations grow.
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Linker, Raphael, Murat Kacira, Avraham Arbel, Gene Giacomelli, and Chieri Kubota. Enhanced Climate Control of Semi-arid and Arid Greenhouses Equipped with Fogging Systems. United States Department of Agriculture, March 2012. http://dx.doi.org/10.32747/2012.7593383.bard.
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The main objectives were (1) to develop, implement and validate control procedures that would make it possible to maintain year-round air temperature and humidity at levels suitable for crop cultivation in greenhouses operating in arid and semi-arid regions and (2) to investigate the influence of the operational flexibility of the fogging system on the performance of the system. With respect to the development of climate controllers, we developed a new control approach according to which ventilation is used to maintain the enthalpy of the greenhouse air and fogging is used to adjust the humidity ratio inside the greenhouse. This approach is suitable mostly for greenhouses equipped with mechanized ventilation, and in which the air exchange rate can be controlled with enough confidence. The development and initial validation of the controllers were performed in a small experimental greenhouses located at the Agricultural Research Organization and very good tracking were obtained for both air temperature and relative humidity (maximum mean deviations over a 10-min period with constant setpoints lower than 2.5oC and 5% relative humidity). The robust design approach used to develop the controllers made it possible to transfer successfully these controllers to a much larger semi-commercial greenhouse located in the much drier Arava region. After only minimal adjustments, which did not require lengthy dedicated experiments, satisfactory tracking of the temperature and humidity was achieved, with standard deviation of the tracking error lower than 1oC and 5% for temperature and relative humidity, respectively. These results should help promote the acceptance of modern techniques for designing greenhouse climate controllers, especially since given the large variety of greenhouse structures (shape, size, crop system), developing high performance site-specific controllers for each greenhouse is not feasible. In parallel to this work, a new cooling control strategy, which considers the contribution of humidification and cooling from the crop, was developed for greenhouses equipped with natural ventilation. Prior to the development of the cooling strategy itself, three evapotranspiration models were compared in terms of accuracy and reliability. The cooling strategy that has been developed controls the amount of fog introduced into the greenhouse as well as the percentage of vent openings based on the desired vapor pressure deficit (VPD) and enthalpy, respectively. Numerical simulations were used to compare the performance of the new strategy with a constant fogging rate strategy based on VPD, and on average, the new strategy saved 36% water and consumed 30% less electric energy. In addition, smaller air temperature and relative humidity fluctuations were achieved when using the new strategy. Finally, it was demonstrated that dynamically varying the fog rate and properly selecting the number of nozzles, yields additional water and electricity savings.