Relevant bibliographies by topics / Yearly mean

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Yearly mean'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "Yearly mean"

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Valdez-Cepeda, Ricardo D., Blanca Mendoza, Rosa Díaz-Sandoval, José Valdés-Galicia, José D. López-Martínez, and Enrique Martínez-Rubín de Celis. "Power-Spectrum Behavior of Yearly Mean Grain Yields." Fractals 11, no. 03 (2003): 295–301. http://dx.doi.org/10.1142/s0218348x03002208.

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Advanced statistical approaches have been applied to determine the temporal scaling-invariance laws in annual mean yields registered in Mexico during the period 1897–1999. When the maize, bean, wheat and rice series are treated as self-affine profiles through power spectrum analysis, the temporal fluctuation f-β is detected in each case for time scales of 2 to 103 years. β values (p < 0.0001) of -1.84 ± 0.15, -1.71 ± 0.218, -1.62 ± 0.194 and -1.7 ± 0.139 for maize, bean, wheat and rice profiles, respectively, suggest that short-term variation is important and are influencing the dynamic evo
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VALDEZ-CEPEDA, RICARDO DAVID, OLIVIA DELGADILLO-RUIZ, RAFAEL MAGALLANES-QUINTANAR, et al. "SCALE-INVARIANCE OF NORMALIZED YEARLY MEAN GRAIN YIELD ANOMALY SERIES." Advances in Complex Systems 10, no. 03 (2007): 395–412. http://dx.doi.org/10.1142/s0219525907001161.

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In crop science, tools of non-linear dynamics, fractals, chaos, intermittency and self-organized criticality may be employed and applied to the analysis of spatial variability and temporal behavior of agro-meteorological variables, soil properties, plant attributes, commercial yields, and prices of the agricultural products in order to gain knowledge about underlying complex processes. A search on the occurrence of particular scaling laws in Mexico's normalized yearly mean grain yield anomaly series of maize (Zea mays L.), beans (Phaseolus vulgaris L.), wheat (Triticum aestivum L.) and rice (O
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Jain, Vikas, Max Lundeen, Israel Byrd, Kent Lee, Michelle Um, and Taye Allred. "0597 Hypoglossal Nerve Stimulation Adherence Increasing Yearly." SLEEP 47, Supplement_1 (2024): A255. http://dx.doi.org/10.1093/sleep/zsae067.0597.

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Abstract Introduction Hypoglossal nerve stimulation (HGNS) for obstructive sleep apnea is a surgically implanted device that the patient starts with a button press on a short-range telemetry remote. The therapy ends after a programmable time period (default 8 hours) or the patient manually stops the therapy with another button press. Patients newly implanted with Inspire devices have been observed to use their therapy more than patients implanted in the past. To test the effect of time on adherence, we analyzed newly activated HGNS patients’ usage data year by year. Methods De-identified data
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Iz, H. Bâki. "Low-frequency fluctuations in the yearly misclosures of the global mean sea level budget during 1900–2018." Journal of Geodetic Science 12, no. 1 (2022): 55–64. http://dx.doi.org/10.1515/jogs-2022-0130.

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Abstract Sub- and super-harmonics of luni-solar forcing are proxies for the natural variations in sea levels observed at tide gauge stations with long records as demonstrated in earlier studies. This study also identified their signatures in the noisy yearly misclosures of the global mean sea level budget for the period 1900–2018. The analyses of the yearly misclosures revealed a temporal linear systematic error of 0.08 ± 0.02 mm/year, which is not explained by the budget components. The estimate is statistically significant (α = 0.05) but small in magnitude and accounts for only 11% (adjusted
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Kuang, Q., and Y. P. Wang. "SPATIAL-TEMPORAL CHARACTERISTICS OF THE AEROSOL OPTICAL DEPTH (AOD) DERIVED FROM LONGTERM (1980–2018) MERRA-2 OVER GUANGDONG." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W9 (October 25, 2019): 103–8. http://dx.doi.org/10.5194/isprs-archives-xlii-3-w9-103-2019.

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Abstract. This paper presents and compares the aerosol optical depth (AOD) spatial-temporal characteristics over five subsets in different locations of Guangdong, as well as Hong Kong and Macau (GDHM) since reform and opening-up. By means of GIS analysis tools and subset the onward MERRA-2 monthly mean value aerosol reanalysis dataset to the size of study area, the results reveal that the yearly mean AOD over the whole GDHM ranged from 0.18 to 0.69 during 1980 to 2018. The field average of AOD in five chosen areas approached to 0.40 and appeared linearly increased at 0.0077 per year. All the f
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Gilgen, H., M. Wild, and A. Ohmura. "Means and Trends of Shortwave Irradiance at the Surface Estimated from Global Energy Balance Archive Data." Journal of Climate 11, no. 8 (1998): 2042–61. http://dx.doi.org/10.1175/1520-0442-11.8.2042.

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Abstract Means and trends of shortwave irradiance at the earth’s surface are calculated from pyranometer measurements stored in the Global Energy Balance Archive (GEBA) database. The GEBA database contains the most comprehensive set of shortwave irradiance monthly means. The relative random error of measurement is approximately 5% of a monthly mean in general and approximately 2% of a yearly mean. The shortwave irradiance yearly means are analyzed in a 2.5° × 2.5° grid. In average example grid cells in Europe (no large altitude differences, no coasts), the difference of shortwave irradiance ye
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Touazi, Mustapha, Jean Pierre Laborde, and Najat Bhiry. "Modelling rainfall-discharge at a mean inter-yearly scale in northern Algeria." Journal of Hydrology 296, no. 1-4 (2004): 179–91. http://dx.doi.org/10.1016/j.jhydrol.2004.03.030.

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Schulz, Horst, та Sigrid Härtling. "Biochemical Parameters as Biomarkers for the Early Recognition of Environmental Pollution on Scots Pine Trees. II. The Antioxidative Metabolites Ascorbic Acid, Glutathione, α-Tocopherol and the Enzymes Superoxide Dismutase and Glutathione Reductase". Zeitschrift für Naturforschung C 56, № 9-10 (2001): 767–80. http://dx.doi.org/10.1515/znc-2001-9-1015.

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AbstractField investigations with Scots pine trees (Pinus sylvestris L.) were performed in eastern Germany, where ambient SO2, NOx and O3 concentrations differed significantly in 1992-99 at three sites, namely Neuglobsow (yearly mean SO2 in 1992: 9 μg m-3), Taura (yearly mean SO2 in 1992: 54 μg m-3 and Rösa (yearly mean SO2 in 1992: 73 μg m-3). To investigate the effects of SO2, NOx and O3 on antioxidants (superoxide dismutase, ascorbic acid, glutathione, glutathione reductase, α-tocopherol) and pigments including chlorophyll fluorescence as well as visible damage symptoms in the form of needl
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L.O.Onundi, Otuogba Philips, and Oumarou M.B. "AN IMPROVEMENT ON THE SOBOYEJO AND NIGERIAN METEOROLOGICAL AGENCY WIND ISOPLETHS MAPS." Continental J. Engineering Sciences 4 (July 22, 2009): 12–19. https://doi.org/10.5281/zenodo.833693.

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The paper reviewed the useful details of the Soboyejo Isopleths map for wind speeds and the Nigerian Meteorological Agency wind Documentation maps produced for Nigeria. The research work discovered some discrepancies in the interpretations given to the data produced by the Agency. Efforts were made to correct the wrong interpretations and a factor that varies from 7.86 to 11.67 was recommended to conveniently convert the daily mean produced by the Nigerian Meteorological Agency to the yearly mean produced by Soboyejo. Alternatively, the researchers decided to find a homogeneous mathematical re
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Østvoll, Eirik, Ola Sunnergren, and Joacim Stalfors. "Does tonsillectomy reduce medical care visits for pharyngitis/tonsillitis in children and adults? Retrospective cohort study from Sweden." BMJ Open 9, no. 11 (2019): e033817. http://dx.doi.org/10.1136/bmjopen-2019-033817.

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ObjectiveTo assess the effectiveness of tonsillectomy/adenotonsillectomy in reducing medical care visits for pharyngitis or tonsillitis in children and adults with chronic/recurrent tonsillitis.DesignRetrospective cohort study.SettingData were retrieved from the VEGA register, a comprehensive regional cohort in Sweden.Participants1044 children (<15 years) and 2244 adults.InterventionTonsillectomy/adenotonsillectomy compared with no surgical treatment.Main outcome measuresChanges in yearly mean rates of medical care visits due to pharyngitis/tonsillitis.ResultsIn children, there was a signif
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Dissertations / Theses on the topic "Yearly mean"

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Dyer, Mary A. "What does it mean to be an early years practitioner? : an investigation into the professional identity of graduate early years practitioners." Thesis, University of Huddersfield, 2018. http://eprints.hud.ac.uk/id/eprint/34584/.

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This study explores the impact of government-driven change (DfEE, 198; DfES, 2006, DCSF, 2008; DfE, 2017b), within a sector largely comprising privately owned and managed organisations, on how individual practitioners understand their role and their professional identity. Workforce reform strategies included the introduction of sector-endorsed degrees to promote the use of critical reflection to raise the quality of practice, a skill understood to develop confidence, autonomy and agency in practitioners (Moss, 2006; Osgood, 2010), for which a personal vision of practice (Dyer and Taylor, 2012)
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Zaveri, Swati. "Role of eating frequency and macronutrient content of in-between-meal snacks in compliance with low fat dietary advice in overweight men aged 25-50 years." Thesis, Queen Margaret University, 2007. https://eresearch.qmu.ac.uk/handle/20.500.12289/7381.

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The prevalence of obesity is increasing rapidly. Eating frequency has been shown to be inversely related to body weight status and appetite control. In addition, macronutrients have a role to play in appetite control, as protein has shown to be more satiating than either carbohydrate or fat. This dietary intervention study aimed to assess the impact of increasing daily eating frequency (EF), by providing either high carbohydrate (HC), high protein (HP), high fat (HF) snacks, or no snacks (control, C) on energy intake (EI), hunger ratings (HR), body weight status and metabolic parameters over 1
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Majiet, Nuraan. "Measurement and uncertainty in the first-year physics laboratory: towards probing students' conceptual understanding of the mean." Master's thesis, University of Cape Town, 2020. http://hdl.handle.net/11427/32529.

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Physics is about sense-making. The world we live in and experience through our sensory modalities is highly complex. In order to make sense of this complexity we reduce the experiences to a more simplified form. The way in which this is achieved is through modelling. Physics consists of both theory and experiment, thus modelling in physics consists of two components: (1) conceptualization and mathematization (theory) which involves ontological innovation and introducing variables and (2) designing experiments which leads to measurements (experiment). We can then compare our theoretical predict
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Rose, Sue. "What does science mean to you? : what are the scientific perceptions of a selection of students from Year 5 to Year 8? : research report." Thesis, University of Canterbury. School of Educational Studies and Human Development, 2002. http://hdl.handle.net/10092/2871.

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This study explores the literature on science education, categorises themes within the literature and uses this as a framework to analyse student views. The purpose of the study was to find out student perceptions ofscience and the teaching of science. The researcher interviewed, individually, sixteen students, (two boys and two girls), at each class level from Years 5 to Years 8. The participants in the focus group were chosen primarily for their skills in articulating their views and their interest in science. The resea~ch method of an open-ended survey, with set questions was used to enable
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Dlamini, Anne T. "Food habits of primary schoolchildren aged 11-15 years in Manzini, Swaziland." Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/46274.

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In this study the food habits of schoolchildren aged 11-15 years in three primary schools in Manzini, Swaziland were described and explored. Their eating patterns and the composition of their meals during the week and over weekends, together with their familiarity, consumption and preference rating of selected traditional foods were established. The school meal programme and other aspects of the school food environment were also included as part of the study. As there is limited information on the food habits of Swazi people in general, and no recent information available on the food habits o
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Auster, Josephine Frances. "Determinants of skin self-examination (SSE) in men aged 50 years or older." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/46236/1/Josephine_Auster_Thesis.pdf.

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Background: Queensland men aged 50 years and older are at high risk for melanoma. Early detection via skin self examination (SSE) (particularly whole-body SSE) followed by presentation to a doctor with suspicious lesions, may decrease morbidity and mortality from melanoma. Prevalence of whole-body SSE (wbSSE) is lower in Queensland older men compared to other population subgroups. With the exception of the present study no previous research has investigated the determinants of wbSSE in older men, or interventions to increase the behaviour in this population. Furthermore, although past SSE inte
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Dadurka, David T. "Metaphoric Competence as a Means to Meta-Cognitive Awareness in First-Year Composition." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5178.

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A growing body of writing research suggests college students' and teachers' conceptualizations of writing play an important role in learning to write and making the transition from secondary to post-secondary academic composition. First-year college writers are not blank slates; rather, they bring many assumptions and beliefs about academic writing to the first-year writing classroom from exposure to a wide range of literate practices throughout their lives. Metaphor acts as a way for scholars to trace students' as well as their instructors' assumptions and beliefs about writing. In this study
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May, Wanda Tignor. "What art means to third and fourth graders : a two-year case study /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1249066419.

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Cederlund, Mats. "Boys with Asperger syndrome grown up : a longitudinal follow-up study of 100 cases more than 5 years after original diagosis /." Göteborg : Institute of Neuroscience and Physiology, Child and Adolescent Psychiatry, Göteborg University, 2007. http://hdl.handle.net/2077/3143.

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Finianos, Boutros. "The effects of a 1-year recreational football protocol on bone mineral density and physical performance parameters in a group of healthy inactive 50 years old men." Thesis, Littoral, 2021. http://www.theses.fr/2021DUNK0575.

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Les buts de cette thèse de doctorat étaient d'explorer les relations entre plusieurs paramètres de performance physique et les paramètres osseux chez un groupe d'homme cinquantenaires, de comparer les indices de résistance osseuse du col fémoral chez un groupe d'homme cinquantenaires inactifs et des anciens joueurs de football de même âge et d'explorer les effets d'un an de football récréatif sur la densité minérale osseuse et les paramètres de performance physique chez un groupe d'hommes cinquantenaires. Trois principales études ont été menées. La première étude a démontré que la VO₂ max (L/m
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Books on the topic "Yearly mean"

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Pietila, Hikka. What does the United Nations mean to women?: An NGO view. United Nations Non-Governmental Liaison Service, 1985.

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Benzie, Alex. The year's midnight. Viking, 1995.

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Linder, Leo G. "Ah, mein kleiner Herzog, du hast Angst?": Jeanne d'Arc. Econ & List, 1998.

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Berman, Steve. Wilde stories 2012: The year's best gay speculative fiction. Lethe Press, 2012.

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1968-, Berman Steve, ed. Wilde stories, 2009: The year's best gay speculative fiction. Lethe Press, 2009.

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1968-, Berman Steve, ed. Wilde stories, 2009: The year's best gay speculative fiction. Lethe Press, 2009.

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Berman, Steve. Wilde stories, 2009: The year's best gay speculative fiction. Lethe Press, 2009.

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Yourdon, Edward. Time bomb 2000: What the year 2000 computer crisis means to you! 2nd ed. Prentice-Hall, 1999.

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Yourdon, Edward. Time bomb 2000: What the year 2000 computer crisis means to you! Prentice Hall PTR, 1998.

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Link, Charles E. A meal for the road: 14 sermons on the Lord's Supper. CSS Pub. Co., 1994.

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Book chapters on the topic "Yearly mean"

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Amoo, Oseni Taiwo, Hammed Olabode Ojugbele, Abdultaofeek Abayomi, and Pushpendra Kumar Singh. "Hydrological Dynamics Assessment of Basin Upstream–Downstream Linkages Under Seasonal Climate Variability." In African Handbook of Climate Change Adaptation. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_116.

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AbstractThe impacts of climate change are already being felt, not only in terms of increase in temperature but also in respect of inadequate water availability. The Mkomazi River Basins (MRB) of the KwaZulu-Natal region, South Africa serves as major source of water and thus a mainstay of livelihood for millions of people living downstream. It is in this context that the study investigates water flows abstraction from headwaters to floodplains and how the water resources are been impacted by seasonal climate variability. Artificial Neural Network (ANN) pattern classifier was utilized for the se
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Alexander, Elise. "What Does Professional Dialogue Mean?" In Professional Dialogues in the Early Years. Routledge, 2025. https://doi.org/10.4324/9781041056614-2.

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Gabler, Hans Walter. "Ulysses 1922 and the Golden Mean." In Genetic Inroads into the Art of James Joyce. Open Book Publishers, 2024. http://dx.doi.org/10.11647/obp.0325.13.

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This chapter reviews the appendices of the author’s critical and synoptic Ulysses edition to ascertain Joyce’s process of proof-reading and text-expanding to ensure that the text body of Ulysses would be divided by printers into a day-time and a night-time sequence of 366 pages each (that is, two ‘years’ of pages; the year of initial publication was a leap-year). This chapter further ascertains that Joyce sized the extension of the Ulysses text body in proportions by page numbers to the ratio of the Golden Mean.
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North, Douglass C. "What do we mean by rationality?" In The Next Twenty-five Years of Public Choice. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-017-3402-8_16.

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Laron, Zvi. "What ESPE Means to Me." In ESPE - The First 50 Years. KARGER, 2011. http://dx.doi.org/10.1159/000333326.

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Goldberg, E. Matilda, and R. William Warburton. "A Year's Intake to an Area Office." In Ends and Means in Social Work. Routledge, 2021. http://dx.doi.org/10.4324/9781003196440-7.

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Yeung, Wei-Jun Jean. "Marriage." In Demographic and Family Transition in Southeast Asia. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-85679-3_3.

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AbstractThe singulate mean age at marriage (SMAM) refers to the average length of a single life expressed in years among those who marry before 50 years old. Men and women have delayed getting marriage and there is an increasing proportion of people remaining single. Divorce rates are low but increasing.
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Andersen, Ole, Per Knudsen, and Lars Stenseng. "The DTU13 MSS (Mean Sea Surface) and MDT (Mean Dynamic Topography) from 20 Years of Satellite Altimetry." In International Association of Geodesy Symposia. Springer International Publishing, 2015. http://dx.doi.org/10.1007/1345_2015_182.

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Fletcher, John. "18. A new agricultural industry in Scotland and the first new domesticated livestock species for 5,000 years." In Game meat hygiene. Wageningen Academic Publishers, 2017. http://dx.doi.org/10.3920/978-90-8686-840-7_18.

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Amzalak, Nimrod. "Big Illusions and Harsh Realities: The Vichy Years." In Fascists and Honourable Men. Palgrave Macmillan UK, 2011. http://dx.doi.org/10.1057/9780230316898_5.

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Conference papers on the topic "Yearly mean"

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Bucşe, Ionela Gabriela, Mariana Ciobanu, and Marius Criveanu. "Climatic Parameter Influence on Environmental Pollution in Drobeta Turnu Severin." In Advances in Engineering and Management. Trans Tech Publications Ltd, 2025. https://doi.org/10.4028/p-bpd1h5.

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The examination of the primary climatic indicators, air temperature and rainfall, at the Drobeta Turnu Severin meteorological station for the period 2011-2022, allowed for the identification of increasing or declining trends. The entire study was developed using three different time frames of analysis: monthly, seasonal, and annual. The results indicate the specificities for each climate parameter on each of the three-time scales. The yearly trends for mean temperature are primarily increasing, while the annual trends for rainfall are generally decreasing. Because of the fluctuation of meteoro
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Karaaslan, Melike Kaya. "Investigation of the Change of Mean Glandular Dose for Different Breast Thickness in Digital Mammography in Three Years." In 2024 Medical Technologies Congress (TIPTEKNO). IEEE, 2024. http://dx.doi.org/10.1109/tiptekno63488.2024.10755291.

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Jeong, Jae-Yoon, Yun-Jae Kim, Poh-Sang Lam, Seunghyun Kim, and Gi-Dong Kim. "Effect Of The Mean Temperature of Storage Site on Chloride-Induced Stress Corrosion Cracking Rate in ASME Code Case N-860: Case Study." In ASME 2022 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/pvp2022-83766.

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Abstract Spent nuclear fuels (SNFs) are stored in stainless steel canisters at Independent Spent Fuel Storage Installations (ISFSIs) typically near the seashore. During long-term storage of these canisters in the dry cask storage system (DCSS), chloride-induced stress corrosion cracking (CISCC) could occur due to the deliquescence of concentrated salt deposits on the canister surface. To evaluate such flaws on the accessible exterior metallic portions of containment systems while in service, the ASME Section XI Code Case N-860 provides inservice inspection requirements for aging management of
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Goudarzi, N., W. D. Zhu, R. Delgado, and A. St. Pé. "An Assessment on the Wind Energy Potential and Possible Solutions for Power Generation in Baltimore County in Maryland, USA." 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/fedsm2014-21784.

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The statistical data of five years wind speed measurements at University of Maryland, Baltimore County are used to find out the availability of wind energy resource for power generation. Wind speeds are measured at an approximately 30 meters above the ground; the monthly and yearly mean wind speeds are calculated and evaluated by using the Weibull distribution function. The annual values of k (dimensionless Weibull shape parameter) ranged from 1.78 to 1.99 with a five-year mean value of 1.87. The annual values of c (Weibull scale parameter) ranged from 3.15 to 3.60 with a five-year mean value
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Babarit, Aure´lien, Jorgen Hals, Adi Kurniawan, Torgeir Moan, and Jorgen Krokstad. "Power Absorption Measures and Comparisons of Selected Wave Energy Converters." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49360.

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In this study, a selection of Wave Energy Converters (WECs) with different working principle is considered. It comprises a heaving device reacting against the seabed, a heaving self-reacting two-bodies device, a pitching device, and a floating OWC device. They are inspired by concepts which are currently under development. For each of these concepts, a numerical Wave To Wire (W2W) model is derived. Numerical estimates of the energy delivery which one can expect are derived using these numerical models on a selection of wave site along the European coast. This selection of wave site is thought
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Oshurok, Dmytro, and Vladyslav Sidenko. "Regression model for potential evaporation prediction." In International Conference of Young Scientists on Meteorology, Hydrology and Environmental Monitoring. Ukrainian Hydrometeorological Institute, 2023. http://dx.doi.org/10.15407/icys-mhem.2023.022.

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Potential evaporation is one of the key variables in numerous studies, such as water balance calculations or assessment of hydrological impacts on different crops. This parameter represents the maximum evaporation over a certain area under available atmospheric conditions. Thus, potential evaporation/evapotranspiration depends on a number of meteorological variables: solar radiation, air temperature and humidity, wind speed etc. Among all of the factors, thermal and solar radiation characteristics play the most important role. Some methods based only on these parameters can be found in literat
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Kidikian, John, and Marcelo Reggio. "Off-Design Prediction of Transonic Axial Compressors: Part 1 — Mean-Line Code and Tuning Factors." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-75124.

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With yearly advances in CFD techniques and methodologies, and the increased capacity and capabilities of computer CPU, GPU, and information storage, CFD has become a powerful design tool. However, despite its vast strengths, a CFD analysis is still based on the sound development of the 1D mean-line analysis methodology. This paper (part 1 of 2) describes an off-design axial compressor mean-line code, tested in a specialized engineering software for the development and analysis of a whole gas turbine engine, and the various tuning factors used to obtain an off-design performance match. It will
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Chanchlani, Kuldeep, Nikhil Khanduja, and Deepak Gunwant. "Improving Mean Time Before Failure MTBF in Rod Pumped Wells by Analyzing Corrosion Barriers." In SPE International Oilfield Corrosion Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205043-ms.

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Abstract Subsurface pumps and production tubulars are one of the important means for the production of crude oil from the subsurface to the surface installation in mature oil and gas fields. The health of downhole pumps and tubulars is severely endangered by the electrochemical deterioration, which will be discussed in the context of the working environment. The extent of damage caused to sucker rods traversing down to the pump for Rod Pump wells is discussed. A self-improved corrosion management process is brought out by briefly discussing inspection, monitoring, and mitigation methods. The c
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Stefanakos, Christos N. "The Long-Term Wind and Wave Spectra of the Mediterranean Sea." In ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2005. http://dx.doi.org/10.1115/omae2005-67181.

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It is a well-known fact that long-term time series of wind and wave data are modelled as nonstationary stochastic processes with yearly periodic mean value and standard deviation (periodically correlated or cyclostationary stochastic processes). Using this model, the initial nonstationary series are decomposed to a seasonal (periodic) mean value m(t) and a residual time series W(t) multiplied by a seasonal (periodic) standard deviation s(t), of the form Y(t) = m(t) + s(t)W(t). The periodic components m(t) and s(t) are estimated using mean monthly values, and the residual time series W(t) is ex
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Stefanakos, Christos N., and Konstandinos A. Belibassakis. "Nonstationary Stochastic Modelling of Multivariate Long-Term Wind and Wave Data." In ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2005. http://dx.doi.org/10.1115/omae2005-67461.

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In the present work, a nonstationary stochastic model, which is suitable for the analysis and simulation of multivariate time series of wind and wave data, is being presented and validated. This model belongs to the class of periodically correlated stochastic processes with yearly periodic mean value and standard deviation (periodically correlated or cyclostationary stochastic process). First, the time series is appropriately transformed to become Gaussian using the Box-Cox transformation. Then, the series is decomposed, using an appropriate seasonal standardization procedure, to a periodic (d
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Reports on the topic "Yearly mean"

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Peterson, Bian, J. Hutchinson, Bijan Gurung, et al. Exploring spatial patterns of overflights at Grand Canyon National Park. National Park Service, 2023. http://dx.doi.org/10.36967/2299660.

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This study explored spatial patterns of overflights at Grand Canyon National Park (GRCA). Overflights were analyzed from February 5th, 2020 to January 9th, 2023 (975 days of data; 95 days of missing data) using Automatic Dependent Surveillance-Broadcast (ADS-B) data. The first phase of analysis focused on all overflights and found a high concentration of overflights above GRCA and definitive travel patterns across the park. The second phase of analysis focused on low-level overflights that fly below 10,000 ft mean sea level (MSL) and fly within 10-miles of the GRCA boundary. Phase 2 figures di
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Patterson, Brian, Shawn Hutchinson, Bijan Gurung, Adam Beeco, Sharolyn Anderson, and Damon Joyce. Exploring spatial patterns of overflights at Great Smoky Mountains National Park. National Park Service, 2023. http://dx.doi.org/10.36967/2299255.

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This study explored spatial patterns of overflights at Great Smoky Mountains National Park (GRSM). Overflights were analyzed from September 25th, 2019 to June 1st, 2022 using Automatic Dependent Surveillance-Broadcast (ADS-B) data. The first phase of analysis focused on all overflights and found a high concentration of overflights above GRSM. The second phase of analysis focused on low-level overflights that fly below 10,000ft mean sea level (MSL) and fly within 10-miles of the GRSM boundary. Phase 2 figures display yearly overflights (2019, 2020, 2021, 2022) and show a concentration of flight
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Lindfors, Axel, and Roozbeh Feiz. The current Nordic biogas and biofertilizer potential: An inventory of established feedstock and current technology. Linköping University Electronic Press, 2023. http://dx.doi.org/10.3384/9789180752558.

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Biogas solutions in the Nordics is undergoing rapid developments and the demand for biogas is ever increasing because of the Russian war on Ukraine and the transition to fossil free industry and transportation. Furthermore, with the introduction of several multi-national companies into the biogas sector in the Nordics and with more and more biomethane being traded across national borders, it becomes increasingly important to view biogas solutions in the Nordics as a whole and to go beyond the confines of each individual nation. Since the transition and the current energy crisis require a quick
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McKay, S. Is mean discharge meaningless for environmental flow management? Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/45381.

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River ecosystems are highly dependent on and responsive to hydrologic variability over multiple time scales (e.g., hours, months, years). Fluctuating river flows present a key challenge to river managers, who must weigh competing demands for freshwater. Environmental flow recommendations and regulations seek to provide management targets balancing socio-economic outcomes with maintenance of ecological integrity. Often, flow management targets are based on average river conditions over temporal windows such as days, months, or years. Here, three case studies of hydrologic variability are presen
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Hood, Andrew, and Tom Waters. Benefit cuts mean the next few years look tough for poor families with children. The IFS, 2017. http://dx.doi.org/10.1920/co.ifs.2024.0302.

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Barnes, Katrina, Barnes, Katrina, Colin Anderson, Stephanie de Chassy, et al. Understanding Governance from the Margins: What Does It Mean In Practice? Institute of Development Studies (IDS), 2021. http://dx.doi.org/10.19088/a4ea.2021.003.

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What does governance look like ‘from below’ – from the perspectives of poor and marginalised households? How do patterns of conflict affect that? These were the questions at the heart of the Governance at the Margins research project. Over three years from 2017-2020 we worked to explore this through in-depth study in conflict-affected areas of Mozambique, Myanmar, and Pakistan. Our research teams interviewed the same people regularly over that time, finding out how they resolved problems and interacted with authorities. In this paper we connect what we found to the realities and complexities o
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Williams, Anne, Catharine Couch, Samuel Emmerich, and Damon Ogburn. Ultra-processed Food Consumption in Youth and Adults: United States, August 2021- August 2023. National Center for Health Statistics (U.S., 2025. https://doi.org/10.15620/cdc/174612.

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This report uses National Health and Nutrition Examination Survey (NHANES) data to provide estimates of the mean percent of total calories from ultra-processed foods and top caloric contributors of ultra-processed foods among youth ages 1–18 years and adults age 19 and older during August 2021–August 2023, and 10-year trends.
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Whitaker, Stephen. Rocky intertidal community monitoring at Channel Islands National Park: 2018–19 annual report. National Park Service, 2023. http://dx.doi.org/10.36967/2299674.

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Channel Islands National Park includes the five northern islands off the coast of southern California (San Miguel, Santa Rosa, Santa Cruz, Anacapa, and Santa Barbara Islands) and the surrounding waters out one nautical mile. There are approximately 176 miles of coastline around the islands, about 80% of which is composed of rock. The diversity and undisturbed nature of the tidepools of this rocky coastline were recognized as special features of the islands in the enabling legislation. To conserve these communities unimpaired for future generations, the National Park Service has been monitoring
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Cordeiro de Amorim, Renato. A survey on feature weighting based K-Means algorithms. Web of Open Science, 2020. http://dx.doi.org/10.37686/ser.v1i2.79.

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In a real-world data set there is always the possibility, rather high in our opinion, that different features may have different degrees of relevance. Most machine learning algorithms deal with this fact by either selecting or deselecting features in the data preprocessing phase. However, we maintain that even among relevant features there may be different degrees of relevance, and this should be taken into account during the clustering process. With over 50 years of history, K-Means is arguably the most popular partitional clustering algorithm there is. The first K-Means based clustering algo
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The Vanier Institute of the Family. Timeline: Fifty Years of Men, Work and Family in Canada. The Vanier Institute of the Family, 2016. https://doi.org/10.61959/opnq7941e.

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Over the past half century, fatherhood in Canada has undergone a significant evolution as men are increasingly sharing the “breadwinning” role, embracing caring responsibilities and integrating their responsibilities at home, at work and in their communities. To explore these trends and the social, economic, cultural and environmental contexts that shape – and are shaped by – fatherhood and family relationships, we’ve created a 50-year timeline for Father’s Day 2016.
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