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Academic literature on the topic 'TOC variability'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "TOC variability"

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Al-Salihi, Ali M., and Zehraa M. Hassan. "Temporal and Spatial Variability and Trend Investigation of Total Ozone Column over Iraq Employing Remote Sensing Data: 1979-2012." International Letters of Chemistry, Physics and Astronomy 53 (July 2015): 1–18. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.53.1.

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The objective of this paper is to analyze the temporal and spatial variability of the total ozone column (TOC) distributions and trends over Iraq, during the last 30 years (1979–2012) using remote sensing-derived TOC data. Due to shortage of ground-based TOC measurements. TOC data derived from the Total Ozone Mapping Spectrometer (TOMS) for the period 1979–2004 and Ozone Monitoring Instrument (OMI) for the period 2005–2012 with spatial resolution (1o×1o) were used in present study. The spatial, long-term, monthly variations of TOC over Iraq were analysed. For the spatial variability, the latitudinal variability has a large range between (45 to 55) DU in winter and spring whereas during summer and autumn months ranged between (6 to 10) DU. Also represents an annual cycle with maximum in March and minimum in October. In contrast, the longitudinal variability is not significant. The long-term variability represented a notable decline for the period 1979–2012. The ozone negative trend was observed significantly during 1979–2004, for all months with trend ranged between (− 0.3 to 2) DU/year whereas the ozone positive trend was appear clearly during 2005–2007, for all months (0.1 to 2.3) DU/year ,except February and September which presented negative trends. The results can provide comprehensive descriptions of the TOC variations in Iraq and benefit climate change research in this region.
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Al-Salihi, Ali M., and Zehraa M. Hassan. "Temporal and Spatial Variability and Trend Investigation of Total Ozone Column over Iraq Employing Remote Sensing Data: 1979-2012." International Letters of Chemistry, Physics and Astronomy 53 (July 1, 2015): 1–18. http://dx.doi.org/10.56431/p-d2kryx.

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The objective of this paper is to analyze the temporal and spatial variability of the total ozone column (TOC) distributions and trends over Iraq, during the last 30 years (1979–2012) using remote sensing-derived TOC data. Due to shortage of ground-based TOC measurements. TOC data derived from the Total Ozone Mapping Spectrometer (TOMS) for the period 1979–2004 and Ozone Monitoring Instrument (OMI) for the period 2005–2012 with spatial resolution (1o×1o) were used in present study. The spatial, long-term, monthly variations of TOC over Iraq were analysed. For the spatial variability, the latitudinal variability has a large range between (45 to 55) DU in winter and spring whereas during summer and autumn months ranged between (6 to 10) DU. Also represents an annual cycle with maximum in March and minimum in October. In contrast, the longitudinal variability is not significant. The long-term variability represented a notable decline for the period 1979–2012. The ozone negative trend was observed significantly during 1979–2004, for all months with trend ranged between (− 0.3 to 2) DU/year whereas the ozone positive trend was appear clearly during 2005–2007, for all months (0.1 to 2.3) DU/year ,except February and September which presented negative trends. The results can provide comprehensive descriptions of the TOC variations in Iraq and benefit climate change research in this region.
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Chapagain, Narayan P. "Investigating Temporal Variability of Total Ozone Column over Kathmandu Using Omi Satellite Observations." Journal of Institute of Science and Technology 21, no. 1 (November 24, 2016): 140–47. http://dx.doi.org/10.3126/jist.v21i1.16066.

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The objective of this work was to analyze the trend of temporal variability of the atmospheric Total ozone column (TOC) over Kathmandu, during the last 13 years of observations using remote sensing-derived data. For this study, long-term TOC data derived from the Ozone Monitoring Instrument (OMI) for the period of October 2004–April 2016 were used. The daily, monthly, seasonal, and annual variations of TOC were analyzed. During the whole study period, the highest value of TOC is found to be 344 DU in March and the lowest value of TOC is 219 DU in December. The average TOC calculated during the whole study period over Kathmandu is found to be 268 DU. The trend of TOC shows a distinct seasonal pattern, with maximum in summer and minimum in winter season, specifically high value in April or May and lower value in December and January. The long-term variability also represents a notable increase in TOC for the period from 2004 to 2015 illustrating the significant recovery atmospheric ozone over Kathmandu. The ozone recovery during the recent years may be due to the reduction of the ozone depletory agents.Journal of Institute of Science and TechnologyVolume 21, Issue 1, August 2016, Page: 140-147
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Grabs, T., K. Bishop, H. Laudon, S. W. Lyon, and J. Seibert. "Riparian zone hydrology and soil water total organic carbon (TOC): implications for spatial variability and upscaling of lateral riparian TOC exports." Biogeosciences 9, no. 10 (October 10, 2012): 3901–16. http://dx.doi.org/10.5194/bg-9-3901-2012.

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Abstract. Groundwater flowing from hillslopes through riparian (near-stream) soils often undergoes chemical transformations that can substantially influence stream water chemistry. We used landscape analysis to predict total organic carbon (TOC) concentration profiles and groundwater levels measured in the riparian zone (RZ) of a 67 km2 catchment in Sweden. TOC exported laterally from 13 riparian soil profiles was then estimated based on the riparian flow–concentration integration model (RIM). Much of the observed spatial variability of riparian TOC concentrations in this system could be predicted from groundwater levels and the topographic wetness index (TWI). Organic riparian peat soils in forested areas emerged as hotspots exporting large amounts of TOC. These TOC fluxes were subject to considerable temporal variations caused by a combination of variable flow conditions and changing soil water TOC concentrations. Mineral riparian gley soils, on the other hand, were related to rather small TOC export rates and were characterized by relatively time-invariant TOC concentration profiles. Organic and mineral soils in RZs constitute a heterogeneous landscape mosaic that potentially controls much of the spatial variability of stream water TOC. We developed an empirical regression model based on the TWI to move beyond the plot scale and to predict spatially variable riparian TOC concentration profiles for RZs underlain by glacial till.
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Shrestha, P. M., N. P. Chapagain, I. B. Karki, and K. N. Poudyal. "Study of Variability of Atmospheric Ozone over Jumla in Half Period of 24 Solar Cycle." Journal of Nepal Physical Society 7, no. 1 (May 7, 2021): 31–38. http://dx.doi.org/10.3126/jnphyssoc.v7i1.36972.

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This paper reports the variation of total ozone column (TOC) over Jumla (Lat.:-29.28° N, Long.:-82.16° E and Alt.:- 2300 m above sea level) from 2008 to 2014 derived from Total Ozone Mapping Spectrometer (TOMS) satellite observations. The monthly, seasonal, annual variations of TOC, solar insolation and clearness index have been analyzed. The result exemplifies that during the whole study period, the maximum value of monthly average TOC is 289.21 DU ± 10.75 DU in April, while the minimum value is 257.23 DU ± 11.25 DU in December. The results also show that TOC is highly seasonal dependent with larger TOC in spring 273.68 DU ± 14.92 DU and lower in the winter season (260.68 DU ± 15.25 DU). The average annual value of TOC exhibits slightly variable with a maximum in 2010 (277.52 DU ± 40.64 DU) and minimum in 2008 (267.19 DU ± 11.11 DU). The average values of solar insolation and clearness index for whole study the period are 5.10 86 kWh/m2/day ± 0.86 kWh/m2/day and 0.59 ± 0.12 respectively. The average value of TOC during the whole study period is 271.84 DU ± 14.19 DU, which indicates a good amount of stratospheric ozone content over Jumla.
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ORUE IRASUEGI, AITOR, AITOR LIZARRALDE AIASTUI, ALVARO GARCIA SANCHEZ, and UNAI APAOLAZA PEREZ DE EULATE. "THE IMPACT OF PROTECTIVE CAPACITY IN IMPLEMENTING DRUM-BUFFER-ROPE METHODOLOGY IN MAKE-TO-ORDER ENVIRONMENTS: AN ASSESSMENT BY SIMULATION." DYNA MANAGEMENT 10, no. 1 (October 17, 2022): [13P.]. http://dx.doi.org/10.6036/mn10619.

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This study uses simulation to analyse the impact of protective capacity in the implementation of the step 3 of the theory of constraints (TOC) methodology in make-to-order (MTO) environments. The results suggest that at different levels of variability, different levels of protective capacity are needed to keep a system stable and meet the bottleneck (BN) schedule. The higher the variability is, the higher the level of protection needed. The definition of the level of protective capacity required is a strategic decision for the organisation, as it must be emphasised that with high levels of variability in a system, the protective capacity must be very high, which contradicts the efficient use of resources. However, for managers to know and control how much protection is needed without needing additional capacity, it is advisable to monitor the use of protective capacity. This concept of protection monitoring and control is relatively new in the TOC–drum-buffer-rope (TOC-DBR) methodology, but it is applied in the demand-driven adaptive business model, and therefore, should be integrated into the TOC-DBR methodology.
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Grabs, T., K. H. Bishop, H. Laudon, S. W. Lyon, and J. Seibert. "Riparian zone processes and soil water total organic carbon (TOC): implications for spatial variability, upscaling and carbon exports." Biogeosciences Discussions 9, no. 3 (March 14, 2012): 3031–69. http://dx.doi.org/10.5194/bgd-9-3031-2012.

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Abstract. Groundwater flowing from hillslopes through riparian (near stream) soils often undergoes chemical transformations that can substantially influence stream water chemistry. We used landscape analysis to predict total organic carbon (TOC) concentrations profiles and groundwater levels measured in the riparian zone (RZ) of a 67 km2 catchment in Sweden. TOC exported from 13 riparian soil profiles was then estimated based on the riparian flow-concentration integration model (RIM). Much of the observed spatial variability of riparian TOC concentrations in this system could be predicted from groundwater levels and the topographic wetness index (TWI). Organic riparian peat soils in forested areas emerged as hotspots exporting large amounts of TOC. Exports were subject to considerable temporal variations caused by a combination of variable flow conditions and changing soil water TOC concentrations. From more mineral riparian gley soils, on the other hand, only small amounts with relatively time-invariant concentrations were exported. Organic and mineral soils in RZs constitute a heterogeneous landscape mosaic that controls much of the spatial variability of stream water TOC. We developed an empirical regression-model based on the TWI to move beyond the plot scale to predict spatially variable riparian TOC concentration profiles for RZs underlain by glacial till.
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Vaz Peres, Lucas, Hassan Bencherif, Nkanyiso Mbatha, André Passaglia Schuch, Abdoulwahab Mohamed Toihir, Nelson Bègue, Thierry Portafaix, et al. "Measurements of the total ozone column using a Brewer spectrophotometer and TOMS and OMI satellite instruments over the Southern Space Observatory in Brazil." Annales Geophysicae 35, no. 1 (January 3, 2017): 25–37. http://dx.doi.org/10.5194/angeo-35-25-2017.

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Abstract. This paper presents 23 years (1992–2014) of quasi-continuous measurements of the total ozone column (TOC) over the Southern Space Observatory (SSO) in São Martinho da Serra, Brazil (29.26° S, 53.48° and 488 m altitude). The TOC was measured by a Brewer spectrometer, and the results are also compared to daily and monthly observations from the TOMS (Total Ozone Mapping Spectrometer) and OMI (Ozone Monitoring Instrument) satellite instruments. Analyses of the main interannual modes of variability computed using the wavelet transform method were performed. A favorable agreement between the Brewer spectrophotometer and satellite datasets was found. The seasonal TOC variation is dominated by an annual cycle, with a minimum of approximately 260 DU in April and a maximum of approximately 295 DU in September. The wavelet analysis applied in the SSO TOC anomaly time series revealed that the Quasi-Biennial Oscillation (QBO) modulation was the main mode of interannual variability. The comparison between the SSO TOC anomaly time series with the QBO index revealed that the two are in opposite phases.
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Atar, Elizabeth, Christian März, Andrew C. Aplin, Olaf Dellwig, Liam G. Herringshaw, Violaine Lamoureux-Var, Melanie J. Leng, Bernhard Schnetger, and Thomas Wagner. "Dynamic climate-driven controls on the deposition of the Kimmeridge Clay Formation in the Cleveland Basin, Yorkshire, UK." Climate of the Past 15, no. 4 (August 13, 2019): 1581–601. http://dx.doi.org/10.5194/cp-15-1581-2019.

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Abstract. The Kimmeridge Clay Formation (KCF) is a laterally extensive, total-organic-carbon-rich succession deposited throughout northwest Europe during the Kimmeridgian–Tithonian (Late Jurassic). It has recently been postulated that an expanded Hadley cell, with an intensified but alternating hydrological cycle, heavily influenced sedimentation and total organic carbon (TOC) enrichment by promoting primary productivity and organic matter burial in the UK sectors of the Boreal Seaway. Consistent with such climate boundary conditions, petrographic observations, total organic carbon and carbonate contents, and major and trace element data presented here indicate that the KCF of the Cleveland Basin was deposited in the Laurasian Seaway under the influence of these conditions. Depositional conditions alternated between three states that produced a distinct cyclicity in the lithological and geochemical records: lower-variability mudstone intervals (LVMIs) which comprise clay-rich mudstone and higher-variability mudstone intervals (HVMIs) which comprise TOC-rich sedimentation and carbonate-rich sedimentation. The lower-variability mudstone intervals dominate the studied interval but are punctuated by three ∼ 2–4 m thick intervals of alternating TOC-rich and carbonate-rich sedimentation (HVMIs). During the lower-variability mudstone intervals, conditions were quiescent with oxic to suboxic bottom water conditions. During the higher-variability mudstone intervals, highly dynamic conditions resulted in repeated switching of the redox system in a way similar to the modern deep basins of the Baltic Sea. During carbonate-rich sedimentation, oxic conditions prevailed, most likely due to elevated depositional energies at the seafloor by current–wave action. During TOC-rich sedimentation, intermittent anoxic–euxinic conditions led to an enrichment of redox-sensitive and sulfide-forming trace metals at the seafloor and a preservation of organic matter, and an active Mn–Fe particulate shuttle delivered redox-sensitive and sulfide-forming trace metals to the seafloor. In addition, based on TOC–S–Fe relationships, organic matter sulfurization appears to have increased organic material preservation in about half of the analysed samples throughout the core, while the remaining samples were either dominated by excess Fe input into the system or experienced pyrite oxidation and sulfur loss during oxygenation events. New Hg∕TOC data do not provide evidence of increased volcanism during this time, consistent with previous work. Set in the context of recent climate modelling, our study provides a comprehensive example of the dynamic climate-driven depositional and redox conditions that can control TOC and metal accumulations in a shallow epicontinental sea, and it is therefore key to understanding the formation of similar deposits throughout Earth's history.
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Ayassou, Koffi, Andrea Pazmiño, Kokou Sabi, Ariane Bazureau, and Sophie Godin-Beekmann. "Evolution of Ozone above Togo during the 1979–2020 Period." Atmosphere 13, no. 12 (December 8, 2022): 2066. http://dx.doi.org/10.3390/atmos13122066.

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The objective of this paper is to estimate the trend of the Total Ozone Column (TOC) over Togo. A Multi-Sensor Reanalysis-2 (MSR-2) of the TOC over the entire territory of Togo was used. A Multiple Linear Regression (MLR) method has been applied to retrieve the interannual contributions of different forcings and the long-term variability. It was found that the Annual Oscillation (AnO), the Quasi Biennial Oscillation at 30 mb (QBO30), the Solar Flux (SF), and the El Niño–Southern Oscillation (ENSO) has a statistically significant influence on the interannual variability of the TOC. The strongest contribution (22 ± 1.4 DU) is allocated to the AnO while the weakest (<1 DU) is attributed to the Semi-Annual Oscillations (SAnO). Before the peak year of the Equivalent Effective Stratospheric Chlorine (EESC) in the tropics in 1997, the trend is negative (−0.3% ± 0.9% per decade) and is not statistically significant. After the peak year, a statistically significant positive trend is observed. The trend of the TOC is 0.6% ± 0.2% per decade. The monthly TOC trend over Togo is positive and statistically significant during the rainy season (particularly during the monsoon period) except in April, unlike during the harmattan period (DJF), where the trend is not significant.
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Dissertations / Theses on the topic "TOC variability"

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Sinnhuber, Björn-Martin. "Variabilität der arktischen Ozonschicht : Analyse und Interpretation bodengebundener Millimeterwellenmessungen = Variability of the Arctic ozone layer /." Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung, 1999. http://www.gbv.de/dms/bs/toc/267905289.pdf.

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Dansereau, Richard. "The Effect of the variability in the physical and chemical properties of magnesium stearate on the preparation of compressed tablets /." Ann Arbor : Univ. Microfilms International, 1985. http://www.gbv.de/dms/bs/toc/016435931.pdf.

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Piel, Claudia. "Variabilität chemischer und physikalischer Parameter des Aerosols in der antarktischen Troposphäre = Variability of chemical and physical parameters of aerosol in the Antarctic troposphere /." Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung, 2004. http://www.gbv.de/dms/bs/toc/378550012.pdf.

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Konrádová, Paula Bc. "Management pacientů s diagnózou TBC." Master's thesis, Vysoká škola ekonomická v Praze, 2007. http://www.nusl.cz/ntk/nusl-1444.

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Práce popisuje onemocnění TBC. Dále šíření, průběh, diagnostiku, léčbu a prevenci tohoto onemocnění v České republice. Navazují informace o výskytu TBC ve světě i v ČR. Praktická část je zaměřena na odborný léčebný ústav Jevíčko, konkrétně jeho historii, umístění, zaměření činnosti, obložnost lůžek, pacienty, zaměstnance, ekonomický popis léčby TBC v sanatoriu Jevíčko a ekonomickou pozici této léčebny.
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Unglaub, C., Ch Jacobi, G. Schmidtke, B. Nikutowski, and R. Brunner. "EUV-TEC - an index to describe ionospheric variability using satellite-borne solar EUV measurements: first results." Universität Leipzig, 2010. https://ul.qucosa.de/id/qucosa%3A16362.

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Primary ionisation of major ionospheric constituents is calculated from satellite-borne solar EUV measurements. Number densities of the background atmosphere are taken from the NRLMSISE-00 climatology. From the calculated ionisation rates, an index termed EUV-TEC, which is based on the global total ionisation is calculated, and describes the ionospheric response to solar EUV and its variability. The index is compared against global mean ionospheric total electron content (TEC) derived from GPS data. Results show that the EUV-TEC index provides a better overall representation of global TEC than conventional solar indices like F10.7 do. The EUV-TEC index may be used for scientific research, and to describe the ionospheric effects on radio communication and navigation systems.
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Chang, Sunny. "Cure Kinetics of Two Part Epoxy Resin and the Effect on Characterization of Thermal Barrier Coatings." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/52781.

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The aerospace industry strives to develop new methods of refining gas turbine engines by increasing power and thermal efficiencies while simultaneously reducing cost. Turbine engines operate under high temperatures and therefore thermal barrier coatings (TBCs) composed of yttria-stabilized zirconia (YSZ) play an important role in improving the performance of the components that make up the engine. Failure of the TBC could lead to catastrophic events, thus requiring consistent and accurate characterization for supplier qualification and production quality assurance. However, due to porosity and the anisotropic behavior of the coating and variability in processing of TBCs, consistent characterization has proven to be extremely challenging. One of the reoccurring issues is the inconsistency in measuring percent porosity, which stems from the difficulty in distinguishing filled pores from damaged, unfilled voids. Sample preparation of TBCs involves sectioning, mounting, grinding, polishing, and characterization. Eliminating variability in characterization begins with mounting which is a critical step to protect the surface integrity and edge retention of the coating during grinding and polishing. The curing kinetics of a slow cure two part epoxy was investigated and the TBC samples were mounted and cured at heating rates of 2, 5, and 10°C/min to 55°C and 70°C. Grinding and polishing procedures simulated industry practices followed by characterization with optical microscopy. Results showed that heating rates of 2°C/min to 55°C and 70°C have the best impregnation properties while uncontrolled or high heating rates of 10°C/min had an increase in the amount of pullouts and lack of infiltration from the epoxy. The curing kinetics of the epoxy needs to be controlled to eliminate the ambiguity of filled and unfilled pores.
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Leterme, Anne-Claire. "Apport des nouvelles technologies à la gestion du stress : e-TCC et biofeedback de variabilité de fréquence cardiaque." Thesis, Lille 2, 2020. http://www.theses.fr/2020LIL2S008.

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Le stress est un enjeu majeur de santé public, responsable du développement et de l’aggravation d’un grand nombre de troubles somatiques (maladies cardio-vasculaires,cancers, maladies infectieuses …) et psychiatriques (anxiété, dépression …). La gestion du stress par les thérapies comportementales, cognitives et émotionnelles (TCCE) est efficace pour réduire les conséquences négatives du stress et prévenir les troubles chez les sujets àrisque, mais son accès reste limité. Internet et les nouvelles technologies du numérique,notamment les self-help, les e-TCC et le biofeedback de variabilité de fréquence cardiaque(biofeedback de VFC) peuvent enrichir les programmes de gestion du stress par les TCCEet faciliter leur accès. Dans ce contexte, l’objectif de ce travail de thèse était de développeret d’évaluer des formats de traitements novateurs combinant TCCE et nouvellestechnologies.Dans un premier temps, le programme Seren@ctif, premier programme francophone de e-TCC dédié à la gestion du stress, a fait l’objet d’un essai contrôlé randomisé sur 120patients répondant au diagnostic de trouble d’adaptation avec anxiété (TAA) selon lescritères du DSM-5 et venant consulter en service de psychiatrie ambulatoire du CHU deLille. Les résultats ont mis en évidence que la TCCE administrée sur internet et guidée parun temps de contact humain en face-à-face avec un professionnel de santé supervisé(TCCE mixte) est tout aussi efficace que la TCCE entièrement administrée en face-à-facepour le traitement du TAA, par comparaison à un groupe contrôle de patients bénéficiantd’un suivi habituel par leur médecin généraliste.Dans un second temps, un nouveau biofeedback de VFC directement basé sur l’activationvagale, a été élaboré à partir d’une nouvelle mesure d’activation parasympathiquedéveloppée par l’équipe du centre d’investigation clinique, innovations technologiques deLille. Cette thèse présente les étapes d’élaboration de ce nouveau biofeedback, suiviesd’une preuve de concept portant sur plusieurs patients présentant divers troubles anxieuxet dépressifs. Ce nouveau biofeedback de VFC constitue une approche prometteusepermettant de stimuler de manière non-invasive le nerf vague. Il pourrait permettreégalement d’améliorer durablement l’activation vagale et d’objectiver physiologiquementl’effet bénéfique de la Mindful Breathing. Cette approche pourrait être complémentaire autraditionnel biofeedback d’arythmie sinusale respiratoire et permettrait de diversifier lestechniques comportementales associées au biofeedback.Les recherches présentées dans cette thèse contribuent à faire avancer la recherche dans ledomaine des technologies de l’information appliquées à la santé mentale etcomportementale. Elles ouvrent des perspectives innovantes sur une nouvelle façond’administrer les TCCE sur internet, sur l’efficacité potentielle d’un nouveau biofeedbackde VFC, ou encore, sur l’intérêt d’un nouveau marqueur de flexibilité du système nerveuxautonome dans l’évaluation objective de l’efficacité des TCC de troisième vague, notammentla Mindfulness
Stress is a major public health issue, responsible for the development and aggravation ofa large number of somatic (cardiovascular diseases, cancers, infectious diseases, etc.) andpsychiatric (anxiety, depression, etc.) disorders. Stress management through cognitive,behavioral and emotional therapies (CBT) is effective to reduce the negative consequencesof stress and prevent disorders in people at risk, but its access remains limited. Internetand new digital technologies, in particular self-help, e-CBT and heart rate variabilitybiofeedback (HRV biofeedback) have the potential to enrich CBT-based stressmanagement programs and make their access easier. In this context, the objective of thisthesis was to develop and evaluate innovative treatment formats using CBT and newtechnologies.Initially, the Seren@ctif program, the first French e-CBT program dedicated to stressmanagement, was evaluated in a randomized controlled trial on 120 patients respondingto the diagnosis of adjustment disorder with anxiety (ADA) according to the DSM-5criteria and consulting in the outpatient psychiatry service of the Lille University Hospital.The results showed that internet-based CBT guided by a human face-to-face contact timewith a supervised health professional (blended CBT) is as effective as the same face-tofaceCBT program for the treatment of ADA, compared to a control group of patientsbenefiting from usual care by their general practitioner.Secondly, a new HRV biofeedback, directly based on vagal activation, was designed froma new measure of parasympathetic activation developed by the team of ClinicalInvestigation Center of Innovative Technology at Lille. The different stages of elaborationof this new biofeedback are presented, followed by a proof of concept carried out onseveral patients with various anxiety and depressive disorders. This new HRV biofeedbackis a promising approach to non-invasively stimulate the vagus nerve. It could alsosustainably improve vagal activation and physiologically objectify the beneficial effect ofMindful Breathing. It could be complementary to the traditional respiratory sinusarrhythmia biofeedback and would allow to diversify the behavioral techniques associatedwith biofeedback.Researches presented in this thesis contribute to advancing research in the field ofinformation technologies applied to mental and behavioral health. They open upinnovative perspectives on a new way to deliver an internet-based CBT, on the potentialeffectiveness of a new HRV biofeedback or on the interest of a new marker of flexibilityof the autonomic nervous system in the objective evaluation of the effectiveness of thethird wave of CBT, especially Mindfulness
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Vanti, Francesco. "Quantificazione del controllo motorio fine in età evolutiva: segmentazione del 'placing-bricks' e analisi della variabilità temporale tramite sensori inerziali." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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I più comuni metodi per la valutazione della prestazione motoria consistono nella somministrazione di batterie di test standardizzati: questo approccio, soprattutto per le valutazioni di processo, spesso fornisce parametri che sono influenzati dal parere soggettivo dell’osservatore. L’obiettivo di questa tesi è di utilizzare i sensori inerziali per l’analisi quantitativa di un test utilizzato per la caratterizzazione della competenza motoria fine in età evolutiva. In particolare è stato strumentato il test motorio “placing bricks” su bambini in età scolare. Il lavoro è stato suddiviso in due fasi: i) sviluppo e validazione, assumendo come riferimento la stereofotogrammetria, di un algoritmo per la segmentazione temporale automatica del task motorio studiato; ii) analisi della variabilità temporale dei parametri temporali stimati con il nuovo algoritmo a partire da misure inerziali su una popolazione di soggetti in età evolutiva (età compresa tra i 6 e gli 8 anni) rispetto a parametri quali genere, dominanza, età anagrafica. Le misure quantitative ottenute per ogni popolazione di individui sono state confrontate tra loto con il test Mann-whitney, i risultati mostrano che i soggetti più grandi sono in grado di performare meglio rispetto ai più piccoli, che la mano dominante è più efficiente rispetto a quella non dominante, mentre le performance di maschi e femmine (a parità di età e di mano usata) sono molto simili tra loro. In conclusione, la strumentazione di un test per la competenza motoria fine è da considerare utile al fine di rendere la valutazione più precisa e approfondita, ma soprattutto oggettiva e può quindi portare il valutatore a una diagnosi più corretta e a una terapia più idonea nel caso di individui affetti da disturbi.
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Zhu, Pengtao [Verfasser], Karl Josef [Akademischer Betreuer] Witt, Tom [Gutachter] Lahmer, and Ivo [Gutachter] Herle. "The Variability of the Void Ratio of Sand and its Effect on Settlement and Infinite Slope Stability / Pengtao Zhu ; Gutachter: Tom Lahmer, Ivo Herle ; Betreuer: Karl Josef Witt." Weimar : Fakultät Bauingenieurwesen / Professur Grundbau, 2018. http://d-nb.info/1155730267/34.

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Zhu, Pengtao Verfasser], Karl Josef [Akademischer Betreuer] [Witt, Tom [Gutachter] Lahmer, and Ivo [Gutachter] Herle. "The Variability of the Void Ratio of Sand and its Effect on Settlement and Infinite Slope Stability / Pengtao Zhu ; Gutachter: Tom Lahmer, Ivo Herle ; Betreuer: Karl Josef Witt." Weimar : Fakultät Bauingenieurwesen / Professur Grundbau, 2018. http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20180403-37411.

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Books on the topic "TOC variability"

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1937-, Fox Robert E., ed. Profitability with no boundaries: Optimizing TOC, lean, Six Sigma results : focus, reduce waste, contain variability. Milwaukee, Wis: ASQ Quality Press, 2011.

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I͡A, Kondratʹev K., and Johannessen Ola M, eds. Arctic environment variability in the context of global change. Berlin: Springer, 2003.

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Orlandini, Simone, and Pavol Nejedlik, eds. Climate Change Impacts on Agriculture in Europe. Florence: Firenze University Press, 2013. http://dx.doi.org/10.36253/978-88-6655-207-9.

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COST Action 734 was launched thanks to the coordinated activity of 29 EU countries. The main objective of the Action was the evaluation of impacts from climate change and variability on agriculture for various European areas. Secondary objectives were: collection and review of existing agroclimatic indices and simulation models, to assess hazard impacts on European agricultural areas; to apply climate scenarios for the next few decades; the definition of harmonised criteria to evaluate the impacts of climate change and variability on agriculture; the definition of warning systems guidelines. Based on the result, possible actions (specific recommendations, suggestions, warning systems) were elaborated and proposed to the end-users, depending on their needs.
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Tonelli, Paolo, ed. Il giudizio nell'estrazione del terzo molare inferiore. Florence: Firenze University Press, 2022. http://dx.doi.org/10.36253/978-88-5518-576-9.

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The scientific literature and clinical dental practice have in the extraction of the lower third molar an area of wide interest. In fact, parallel to the presence of prejudices and false beliefs on the part of patients, there is also a great variability of scientific opinions among professionals in the field, both in relation to the indications for extraction, diagnostic aids, and intra- and post-operative management. Our text aims to merge the awareness given by clinical experience with the knowledge of an evidence-based dental culture, proposing itself as a stimulus for in-depth study for students, professionals and enthusiasts of the subject. The multimedia digital resources (photos and videos) of some dental procedures can be freely consulted via the QR code on the cover.
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Huang, Minyao. Referential variability of generic ‘one’. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198786658.003.0009.

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This chapter presents novel data regarding the semantic interpretation of generic ‘one’. First, it is argued that ‘one’ does not always refer to oneself while generalizing from the self’s experience. Moreover, based on the results of a reading comprehension survey, it is shown that ‘one’ can refer to (i) the speaker without generalization, (ii) anyone like the speaker, (iii) anyone in a certain class that does not necessarily include the speaker, or (iv) a non-speaker without generalization. The four types of reference are further analysed as two dimensions of contextual variation that interact with a merely generic meaning of ‘one’. They are variations in the domain of quantification and the at-issue content of a generic statement.
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Minbashian, Amirali. Within-Person Variability in Performance. Edited by David G. Collings, Kamel Mellahi, and Wayne F. Cascio. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780198758273.013.27.

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Understanding individual performance at work is an important element in developing effective talent-management systems. Although research on individual performance has largely addressed between-person differences in performance, more recently, focus has been on within-person variability in performance. This chapter reviews the literature on within-person variability. A model of individual performance is presented that incorporates short-term and long-term within-person performance variability and individual differences. The benefits of the model as a framework for explaining individual performance are outlined, as are its implications for the conceptualization of talent and the development of talent-management systems. Specific talent-management practices with respect to employee assessment and employee motivation are discussed.
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Rosenzweig, Cynthia, and Daniel Hillel. Climate Variability and the Global Harvest. Oxford University Press, 2008. http://dx.doi.org/10.1093/oso/9780195137637.001.0001.

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The Earth's climate is constantly changing. Some of the changes are progressive, while others fluctuate at various time scales. The El Niño-la Niña cycle is one such fluctuation that recurs every few years and has far-reaching impacts. It generally appears at least once per decade, but this may vary with our changing climate. The exact frequency, sequence, duration and intensity of El Niño's manifestations, as well as its effects and geographic distributions, are highly variable. The El Niño-la Niña cycle is particularly challenging to study due to its many interlinked phenomena that occur in various locations around the globe. These worldwide teleconnections are precisely what makes studying El Niño-la Niña so important. Cynthia Rosenzweig and Daniel Hillel describe the current efforts to develop and apply a global-to-regional approach to climate-risk management. They explain how atmospheric and social scientists are cooperating with agricultural practitioners in various regions around the world to determine how farmers may benefit most from new climate predictions. Specifically, the emerging ability to predict the El Niño-Southern Oscillation (ENSO) cycle offers the potential to transform agricultural planning worldwide. Biophysical scientists are only now beginning to recognize the large-scale, globally distributed impacts of ENSO on the probabilities of seasonal precipitation and temperature regimes. Meanwhile, social scientists have been researching how to disseminate forecasts more effectively within rural communities. Consequently, as the quality of climatic predictions have improved, the dissemination and presentation of forecasts have become more effective as well. This book explores the growing understanding of the interconnectedness of climate predictions and productive agriculture for sustainable development, as well as methods and models used to study this relationship.
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Poplack, Shana. Dealing with variability in loanword integration. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190256388.003.0005.

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This chapter tests a strong loanword integration hypothesis: that donor-language material that has been borrowed will display variability in morphosyntactic integration paralleling that of the recipient language. This requires explicitly marshalling the recipient language as the benchmark for comparison, an innovation implemented here for the first time. Illustrating with the typologically different Tamil-English language pair, word order and case-marking of English-origin objects of Tamil verbs are analyzed. English indirect objects are overwhelmingly inflected with Tamil dative markers, but direct objects tend not to be marked for the accusative. Comparison reveals that this patterning reflects the case-marking variability inherent in the recipient-language benchmark, compelling us to recognize even these apparently bare forms as borrowed, and supporting the Nonce Borrowing Hypothesis. This demonstrates that the facts of variability must be taken into account to identify which forms have been borrowed and which have been code-switched.
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Ronen, Boaz, Joseph S. Pliskin, and Shimeon Pass. The Effects of Variability and Uncertainty (DRAFT). Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190843458.003.0014.

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Uncertainty and variability are among the biggest enemies of healthcare systems. Variability that is not properly managed may turn noncritical resources into bottlenecks, leading to increased response times, decreased throughput, and deteriorating quality. The chapter presents tools and techniques to protect against variability (managing buffers, creating protective capacity, etc.) and to reduce variability (response times reduction, creating a group technology structure, working in small batches, etc.). The chapter also presents Litvak’s approach to managing variability.
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Fabris, Flavia. Waddington’s Processual Epigenetics and the Debate over Cryptic Variability. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198779636.003.0012.

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This chapter reappraises Waddington’s processual theory of epigenetics and examines its implications for contemporary evolutionary biology. It focuses in particular on the ontological difference between two conflicting assumptions that have been conflated in the recent debate over the nature of cryptic variability: a substance view that is consistent with the modern synthesis and construes variability as a preexisting pool of random genetic variation; and a processual view, which derives from Waddington’s conception of developmental canalization and understands variability as an epigenetic process. The chapter also discusses how these opposing interpretations fare in their capacity to explain the genetic assimilation of acquired characters.
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Book chapters on the topic "TOC variability"

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Meincke, J., D. Quadfasel, W. H. Berger, K. Brander, R. R. Dickson, P. M. Haugan, M. Latif, et al. "Variability of the Thermohaline Circulation (THC)." In Marine Science Frontiers for Europe, 39–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55862-7_4.

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Neuberger, Gustavo, Gilson Wirth, and Ricardo Reis. "Process Variability." In Protecting Chips Against Hold Time Violations Due to Variability, 5–14. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-2427-3_2.

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Casamian-Sorrosal, Domingo. "Heart Rate Variability." In Guide to Canine and Feline Electrocardiography, 231–40. Chichester, UK: John Wiley & Sons, Ltd, 2018. http://dx.doi.org/10.1002/9781119254355.ch16.

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Anderson, T. W., Jeremy D. Finn, Susan B. Gerber, and Kristin E. Voelkl. "Measures of Variability." In The SPSS Guide to the New Statistical Analysis of Data, 51–58. New York, NY: Springer New York, 1997. http://dx.doi.org/10.1007/978-1-4612-2262-0_4.

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Leino, Jaakko, and Jan-Ola Östman. "8. Constructions and variability." In Constructional Approaches to Language, 191–213. Amsterdam: John Benjamins Publishing Company, 2005. http://dx.doi.org/10.1075/cal.4.12lei.

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Neuberger, Gustavo, Gilson Wirth, and Ricardo Reis. "Systematic and Random Variability." In Protecting Chips Against Hold Time Violations Due to Variability, 55–68. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-2427-3_7.

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Pokorny, Joel, Vivianne C. Smith, and Michael F. Wesner. "Variability in Cone Populations and Implications." In From Pigments to Perception, 23–34. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3718-2_3.

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Norris, Patrick R. "Analysis of Heart Rate Variability." In Complex Systems and Computational Biology Approaches to Acute Inflammation, 51–77. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-8008-2_4.

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Dick, Thomas E., Rishi R. Dhingra, Yee-Hsee Hsieh, Mikkel Fishman, Farhad Kaffashi, Kenneth A. Loparo, Christopher G. Wilson, and Frank J. Jacono. "Analysis of Ventilatory Pattern Variability." In Complex Systems and Computational Biology Approaches to Acute Inflammation, 79–99. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-8008-2_5.

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Wassie, Adera S., and Noah M. Pauline. "Effectiveness of existing climate smart agricultural practices in Tehuledere district, north-eastern Ethiopia." In Climate change impacts and sustainability: ecosystems of Tanzania, 180–93. Wallingford: CABI, 2020. http://dx.doi.org/10.1079/9781789242966.0180.

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Abstract This study sought to understand the effectiveness of existing climate smart agricultural (CSA) practices used by smallholder farmers in Tehuledere District, north-eastern Ethiopia, using empirical data collected over 3 months in 2016. Both qualitative and quantitative data were collected from primary and secondary sources, including historical climatic records and perceptions, indicatiors of climate change, impacts and responses. The study employed focus group discussions and a household questionnaire survey during data collection. Findings reveal that the majority of participants are aware of climate change and variability. The indicators of climate change include drought, off-season rainfall, too little and/or too much rainfall, and high temperature. The impact of climate variability observed by participants include: (i) decreasing crop yields and livestock production; (ii) increasing pests and disease; and (iii) decreasing water quantity and quality. The adaptation measures embraced to mitigate negative climate change effects include: (i) changing crop varieties; (ii) integrating livestock and crop production; and (iii) soil and water conservation practices. As far as CSA practices were found to be viable and effective response measures, support from innovative polices and strategies should be emphasized so as to address the barriers and bring about widespread adoption.
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Conference papers on the topic "TOC variability"

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Abu-Mahfouz, Israa S., Maria Ardila, and Volker Vahrenkamp. "Geochemical and Petrographic Characteristics of Lithofacies from Upper Cretaceous Organic-Rich Source Rocks, Jordan." In International Petroleum Technology Conference. IPTC, 2022. http://dx.doi.org/10.2523/iptc-21914-ms.

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Abstract The Upper Cretaceous source rocks of Jordan are organic-rich carbonate mudrocks that represent excellent source rocks but are essentially still immature to just entering the oil window. Therefore, they offer a unique opportunity to study lithology, source rock composition, and geochemistry prior to the onset of maturation and expulsion of hydrocarbons. Our study aims to examine the lithological and geochemical characteristics of these high-quality source rocks. The study utilizes an integrated petrographic and geochemical approach to define the different microfacies in the studied source rock sequence and understand their intrinsic variability. Representative subsurface samples were collected from 13 vertical cores drilled in the Upper Cretaceous interval across Jordan for bulk elemental geochemistry and microfacies analysis. To define the different microfacies and examine the mineralogical and geochemical changes, the samples were investigated for their composition, texture and lithofacies (using both optical microscopy and scanning electron microscopy (SEM/EDS)), mineralogy (XRD/XRF), and geochemistry (total organic carbon, (TOC) and total Sulphur content using a LECO elemental analyzer, and maturity using Rock-Eval). Five laminated and non-laminated carbonate and siliceous lithofacies associations were identified, all containing significant organic content (TOC varies from 7 to 29 wt.%) and Sulphur contents (2-7.5 wt.%). The rocks are of type II-S kerogen with high HI (Hydrogen Index) values of &gt;600 mg HC/g TOC. XRD results show that the rocks are mainly composed of calcite (15-94%, 75% on average) and quartz (0-53%, 10.47% on average). Minor amounts of apatite (average 5.9%, range 0 to 27%), clay (&lt; 7%), pyrite (up to 6%), gypsum (up to 4%) and dolomite (up to 2.7%) are also exist. Our results indicate a predominance of the organic-rich calcareous microfacies association, evidenced by the abundant foraminifera grains and the high preservation of organic matter as disseminated throughout the matrix and/or filling interparticle micropores and microfractures. This reflects the deposition in a restricted basin under anoxic conditions. The integration of the data obtained through the different techniques used in this study together with the unique characteristics of these source rocks allowed the characterization of the geological and geochemical properties of the defined lithofacies associations in these immature, organic-rich Upper Cretaceous source rocks. This, in turn, helped to achieve a better evaluation of the occurrence and distribution of the different litho- and organic facies and estimation of hydrocarbon source potential.
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Sundell, Tyler, and Gary S. Michelfelder. "DIAMOND INTRAGRANULAR δ13C VARIABILITY MEASURED BY TOF-SIMS." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-306528.

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Gabrys, Ryan, Eitan Yaakobi, Laura Grupp, Steven Swanson, and Lara Dolecek. "Tackling intracell variability in TLC Flash through tensor product codes." In 2012 IEEE International Symposium on Information Theory - ISIT. IEEE, 2012. http://dx.doi.org/10.1109/isit.2012.6282078.

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Alanazi, Abdulaziz, Mohana Alanazi, and Amin Khodaei. "Managing the microgrid net load variability." In 2016 IEEE/PES Transmission and Distribution Conference and Exposition (T&D). IEEE, 2016. http://dx.doi.org/10.1109/tdc.2016.7519977.

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Perkins, A. E., M. E. Daube-Witherspoon, S. Surti, E. Clementel, and J. S. Karp. "Reduction in variability of clinical lesion quantification with TOF-PET imaging." In 2010 IEEE Nuclear Science Symposium and Medical Imaging Conference (2010 NSS/MIC). IEEE, 2010. http://dx.doi.org/10.1109/nssmic.2010.5874494.

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Bertot, Edward, Stephen Lynch, and CDR Dan Lubin. "Using GPS TEC measurements to model ionospheric variability with local oceanic tidal modes." In 2015 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium). IEEE, 2015. http://dx.doi.org/10.1109/usnc-ursi.2015.7303563.

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"MODELING QUALITY ATTRIBUTE VARIABILITY." In 3rd International Conference on Evaluation of Novel Approaches to Software Engineering. SciTePress - Science and and Technology Publications, 2008. http://dx.doi.org/10.5220/0001759801690176.

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Miller, Jonathan T., and Tom Furuya. "Variability of Real UXO." In Symposium on the Application of Geophysics to Engineering and Environmental Problems 2007. Environment and Engineering Geophysical Society, 2007. http://dx.doi.org/10.4133/1.2924737.

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T. Miller, Jonathan, and Tom Furuya. "Variability Of Real Uxo." In 20th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems. European Association of Geoscientists & Engineers, 2007. http://dx.doi.org/10.3997/2214-4609-pdb.179.0755-772.

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Click, David K., Houtan Moaveni, Kristopher O. Davis, Richard H. Meeker, Robert M. Reedy, Anthony Pappalardo, and Rodica Krueger. "Effects of solar resource variability on the future Florida transmission and distribution system." In 2012 IEEE/PES Transmission and Distribution Conference and Exposition (T&D). IEEE, 2012. http://dx.doi.org/10.1109/tdc.2012.6281547.

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Reports on the topic "TOC variability"

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Glickman, Matthew R., and Vicente J. Romero. Analyst-to-Analyst Variability in Simulation-Based Prediction. Office of Scientific and Technical Information (OSTI), February 2017. http://dx.doi.org/10.2172/1343367.

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Sprintall, Janet. An Ocean Sensor Array to Detect Small-Scale Variability. Fort Belvoir, VA: Defense Technical Information Center, July 2009. http://dx.doi.org/10.21236/ada503326.

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Baer, Ferdinand, Joseph J. Tribbia, and Mark Taylor. Enhancements to modeling regional climate response and global variability. Office of Scientific and Technical Information (OSTI), December 2001. http://dx.doi.org/10.2172/799436.

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Cavigelli, Michel. Mid-Atlantic Corn and Soybean Yields Show Great Variability in Response to Precipitation during Critical Growth Stages. USDA Northeast Climate Hub, May 2018. http://dx.doi.org/10.32747/2018.6892663.ch.

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The mid-Atlantic coastal plain, where the FSP is located, has higher than average variability in corn and soybean yields compared to the most productive agricultural regions in the US. Precipitation is the primary driver of crop yield variability in this region and drought is often responsible for low yields.
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Tare, Medha, Alison R. Shell, and Jessica Jackson. Shifting Mindsets: Designing Lessons for Learner Variability. Digital Promise, June 2022. http://dx.doi.org/10.51388/20.500.12265/157.

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Classrooms nationwide welcome a diverse group of learners. A goal, and an achievable one, is to recognize this unique diversity on a whole child spectrum and to strive to customize learning to meet individual needs. Critical to this process is for teachers to have at hand research that connects factors of learning in a holistic way. It is equally important to provide research-based strategies that teachers can use to embrace differences and provide pathways to robust learning for each student. With these considerations in mind, the Learner Variability Project (LVP) engaged in a partnership with the national nonprofit DonorsChoose to discover if teachers across the country could use the Learner Variability Navigator (LVN) to find and put in place research-based strategies that address the whole learner. The LVN is a free and open-source web app that curates research to provide factors of learning and affiliated strategies on a whole child framework. The pilot study found that even brief use of LVN encouraged teachers to reflect on the research-based strategies they already use and explore new strategies that support their students’ diverse experiences and needs.
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Kurtz, Julie E., and John M. Ulimwengu. Biennial review 2019: Commitment 6: Enhancing resilience to climate variability. Washington, DC: International Food Policy Research Institute, 2020. http://dx.doi.org/10.2499/p15738coll2.134149.

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Oakey, Neil S. Horizontal Variability in Surface Mixing in Response to Wind Forcing. Fort Belvoir, VA: Defense Technical Information Center, September 1997. http://dx.doi.org/10.21236/ada629422.

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Smith, Kevin B. Analysis of 3-D Propagation Effects Due to Environmental Variability. Fort Belvoir, VA: Defense Technical Information Center, September 2014. http://dx.doi.org/10.21236/ada616451.

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Raszewski, F., T. Tommy Edwards, D. David Peeler, D. David Best, I. Irene Reamer, and P. Phyllis Workman. VARIABILITY STUDY WITH FRIT 510 TO SUPPORT A SECOND TANK 40 DECANT. Office of Scientific and Technical Information (OSTI), July 2008. http://dx.doi.org/10.2172/936863.

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LePage, Kevin D. Scattering and Reverberation Uncertainty in Shallow Water Environments due to Environmental Variability. Fort Belvoir, VA: Defense Technical Information Center, September 2003. http://dx.doi.org/10.21236/ada630285.

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