Academic literature on the topic 'Index RDI'
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Journal articles on the topic "Index RDI"
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Zhang, Heng Jia, and Jun Hui Li. "Comprehensively Evaluating Soil Nutrients in Spring Wheat (Triticum aestivum) Field under Regulated Deficit Irrigation in an Arid Environment." Advanced Materials Research 773 (September 2013): 837–43. http://dx.doi.org/10.4028/www.scientific.net/amr.773.837.
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A field experiment was carried out in 2007 and 2008 growing seasons to explore the comprehensive evaluation of soil nutrients in spring wheat field under regulated deficit irrigation (RDI) in an arid environment. The soil organic matter, soil total and available nitrogen, phosphorus, and potassium in 0~40 cm layer after two years of RDI management were selected as the evaluating factors to determine both the weighing coefficient of each soil nutrient component and the comprehensive evaluation index for soil nutrients (CEISN) using the membership function in fuzzy mathematics. The results showed that the CEISN was higher in all the RDI management than that in the no water deficit control except 3.5% lower in RDI2 over CK. The CEISN improvement was respectively 6.3%, 6.1%, 6.1%, 5.3%, 4.9%, and 3.8% higher in RDI7, RDI4, RDI5, RDI1, RDI3, RDI6 than in CK sequentially. Consequently, after two years of experiment, the optimal water management and sustainable soil nutrient use pattern was maintained in RDI7 due to its maximum CEISN in all the water deficit regulation regimes.
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Katipoğlu, Okan Mert, Reşat Acar, and Selim Şengül. "Comparison of meteorological indices for drought monitoring and evaluating: a case study from Euphrates basin, Turkey." Journal of Water and Climate Change 11, S1 (2020): 29–43. http://dx.doi.org/10.2166/wcc.2020.171.
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Abstract Drought incidents occur due to the fact that precipitation values are below average for many years. Drought causes serious effects in many sectors, such as agriculture, economy, health, and energy. Therefore, the determination of drought and water scarcity, monitoring, management, and planning of drought and taking early measures are important issues. In order to solve these issues, the advantages and disadvantages of five different meteorological drought indices were compared, and the most effective drought index was determined for monitoring drought. Accordingly, in the monthly, 3-month, and 12-month time period, covering the years between 1966 and 2017 (52 years), Standardized Precipitation Index (SPI), Statistical Z-Score Index (ZSI), Rainfall Anomaly Index (RAI), Standardized Precipitation Evapotranspiration Index (SPEI), and Reconnaissance Drought Index (RDI) were used. It was concluded that precipitation-based SPI and ZSI are similar patterns and precipitation, and temperature-based SPEI and RDI are similar patterns. Also, it has been determined that RAI is more effective than other indices in determining the periods of extreme drought or wet. Furthermore, SPEI and RDI have been found to be superior to other indices as they take into account the water consumption and climate effects caused by evapotranspiration.
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Gliklich, Richard E., Farhan Taghizadeh, and John W. Winkelman. "Health status in patients with disturbed sleep and obstructive sleep apnea." Otolaryngology–Head and Neck Surgery 122, no. 4 (2000): 542–46. http://dx.doi.org/10.1067/mhn.2000.102579.
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The health status of 435 consecutive patients with sleep disturbances necessitating polysomnography was investigated. Patients underwent overnight polysomnography and health status assessment, including the Medical Outcomes Study SF-36 Health Survey and the Pittsburgh Sleep Quality Index. Based on a respiratory distress index (RDI) greater than 10 to define apnea, patients with apnea were significantly ( P < 0.05) more likely to be male, be older, and have higher body mass index and lower oxygen saturation levels than patients without apnea. Multiple domains of the SF-36 Health Survey and the Pittsburgh Sleep Quality Index were significantly worse ( P < 0.05) for this population when normative data were compared. Although few differences were observed between the apneic and nonapneic patients when a cutoff point for apnea was defined as an RDI greater than 10 or 20, increasing RDI was significantly associated with worsening physical functioning scores. Overall, decrements in health status measures were more strongly correlated with the number of oxygen desaturations below 85% than with increasing RDI. We conclude that patients with sleep disturbances demonstrate significant decrements in general and sleep-specific health status, but these decrements are more closely associated with oxygen desaturation than RDI.
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Ghali, S., and E. A. Mousa. "Mathematical Analysis of the Effect of Iron and Silica on the Reduction Performance of Manganese Ores." Journal of Metallurgy 2015 (January 1, 2015): 1–10. http://dx.doi.org/10.1155/2015/679306.
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In the current study, a factorial design is used to investigate the effect of total iron and silica on the metallurgical performance of different grades of manganese ores. The derived mathematical formulations are applied to estimate the reduction disintegration index (RDI+6.3, RDI+3.15, and RDI−0.5), reduction index (total reduction index (RIT), manganese reduction index (RIM), and iron reduction index (RIF)), and softening-melting property (start of softening (TS1), end of softening (TS2), start of melting (Tm1), and end of melting (Tm2)) of manganese ores. The RDI+6.3 and RDI+3.15 are increased with the individual effect of SiO2 and the interaction effect of iron with silica, while they are decreased as the total iron increased. The high-Fe high-SiO2 manganese ore showed the highest RIT and RIF. The RIM was almost identical in all manganese ores. The presence of high content of SiO2 resulted in a narrow softening range (62–83°C), while the high-Fe high-SiO2 manganese ore exhibited a wider softening range (135–140°C). The melting range was very small in high-Fe low-SiO2 (3–16°C) and high-Fe high-SiO2 (6–8°C) manganese ores, while the low-Fe low-SiO2 manganese ore showed wider melting range (72–74°C). The derived mathematical models are in a good agreement with the experimental results. The calculations are carried out using Matlab program.
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Ring, Sorcha, Derbrenn O'Connor, Niamh Cooney, and Brian Richard Bird. "Charlson Comorbidity Index (CCI) score to predict early reduced relative dose intensity in patients receiving oxaliplatin for colorectal cancer." Journal of Clinical Oncology 35, no. 15_suppl (2017): e18125-e18125. http://dx.doi.org/10.1200/jco.2017.35.15_suppl.e18125.
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e18125 Background: Colorectal cancer (CRC) is commonly treated in both adjuvant and palliative settings with Oxaliplatin. Painful peripheral neuropathy resulting in dose adjustments is a well recognized side effect in up to 30% of cases. Relative dose intensity (RDI), an expression of the percentage of planned dose received at a scheduled time, is a tool used to measure how closely a prescription has been adhered to. Studies have suggested a decreased RDI (<85%) is associated with inferior outcomes. The aim of this study was to calculate the RDI for CRC patients undergoing treatment with Oxaliplatin, to investigate reasons for dose delays and reductions and to calculate a Charlson Co-Morbidity Index Score (CCIS) for each patient Methods: CRC patients treated with Oxaliplatin from 2010-2016 within the BSHC were identified using pharmacy lists and pathology reports. The following exclusion criteria were applied: non first line Oxaliplatin and excluding cycles after three months. Data was obtained through a systematic, retrospective chart review. An audit of the chemotherapy prescriptions allowed the RDI to be calculated and the CCIS was calculated using a colorectal specific Index previously described. Results: We identified 176 eligible patients, 83 charts were available for review and 69 charts contained all necessary information to be included. Xelox (61%), Folfox-6 (35%) and Flox (4%) were the chemotherapy agents involved in this study. The average RDI achieved was 87.47%, with a range of 25%-103.17%. The primary cause for dose adjustments was peripheral neuropathy (64%). The CCIS range was 0 -3, with results demonstrating a significant connection between a higher CCI and lower RDI, see table 1. Conclusions: A CCIS ≤ 1 correlates to achieving a higher RDI, with each of these subgroups achieving above the acceptable cut off for RDI (>85%), as such certain co-morbidities may be early predictors of reduced RDI. [Table: see text]
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Yasa, I. Wayan, Mohammad Bisri, Moch Sholichin, and Ussy Andawayanti. "Hydrological drought index based on reservoir capacity – Case study of Batujai dam in Lombok Island, West Nusa Tenggara, Indonesia." Journal of Water and Land Development 38, no. 1 (2018): 155–62. http://dx.doi.org/10.2478/jwld-2018-0052.
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AbstractHydrological drought index analysis has been widely developed and applied for the development of water resources. The island of Lombok, which is largely a dry land, requires a significant hydrological drought index to be sourced from measurable data analysis. This research focused aims to obtain hydrological drought index in Lombok Island using the capacity change of reservoir. The analysis includes reservoir data especially in the event of El-Nino. The main parameters analysed in this work are data homogeneity, decrease line of reservoir volume, increase in the line of reservoir volume, reservoir volume deficit, and hydrological drought index (RDI). The basic equation uses the water balance in the reservoir, which is the inflow–outflow and change of reservoir. The results of the analysis show that in the event of El-Nino, the drought hydrological index indicates different levels depending upon the water level of the reservoir. The criteria for the drought level are as follows: weak RDI = from −0.46 to −0.01 at an reservoir elevation of 90.88 to 92.33 m a.s.l, moderate RDI: from −0.59 to −0.46 at water level of reservoir from 90.27 to 90.88 m a.s.l, sever RDI: from −0.80 to −0.59 at water level of reservoir from 88.83 to 90.27 m a.s.l. and very severe RDI: from −0.89 to −0.80 at water level of water reservoir 87.78–88.83 m a.s.l. The duration of drought was 9 months, i.e., from February to November.
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Chang, Yu-Sen, Kuan-Hung Lin, Ying-Jung Chen, Chun-Wei Wu, and Yu-Jie Chang. "SAVING WATER USED FOR VEGETABLE PRODUCTION BY APPLYING REGULATED DEFICIT IRRIGATION PRACTICES." Acta Scientiarum Polonorum Hortorum Cultus 20, no. 3 (2021): 27–36. http://dx.doi.org/10.24326/asphc.2021.3.3.
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Water deficit during the growing season is a major factor limiting vegetable production. Therefore, saving water used for vegetable production by applying regulated deficit irrigation (RDI) can be a strategy to reduce water supply. The effects of different RDI levels from irrigation systems on vegetable yields, yield components, water use, and water use efficiency (WUE) of maize, lettuce, and garland chrysanthemum were investigated in a pot experiment. Plants were subjected to four irrigation levels, as follows: full irrigation as a control (RDI-100), 70% of full irrigation (RDI-70), 50% of full irrigation (RDI-50), and 30% of full irrigation (RDI-30). The WUE values of maize and lettuce were significantly higher with RDI-30 than other treatments, yet a significant reduction of WUE in garland chrysanthemum was detected compared to other treatments. There were significant correlations of WUEi with WUEyield and WUEbiomass in maize plants, indicating that WUEi can be a useful nondestructive estimator of yields and biomass contents in maize. Moreover, a significant correlation between WUEi and WUEyield in lettuce plants was observed. This index was correlated with economic production, and can be used to assess fresh weights and as an index of the irrigated water content. These results for evaluating water deficits in plants used nondestructive measurements that are applicable to large-scale water management of vegetable plants, thereby enabling scarce water resources to be conserved.
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Morris, Floyd. "The Regional Disability Index and Strengthening Resilience of Persons with Disabilities in the Anglophone Caribbean." Journal of Caribbean Environmental Sciences and Renewable Energy 3, no. 1 (2020): 45–61. http://dx.doi.org/10.33277/cesare/003.001/04.
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In 2019, the University of the West Indies Centre for Disability Studies (UWICDS) released the results of the first Regional Disability Index (RDI). The RDI was developed with the primary aim to track and rank countries within the Caribbean in terms of their efforts to implement the provisions of the Convention on the Rights of Persons with Disabilities (CRPD) and by extension, the Sustainable Development Goals (SDGs). The RDI used a quantitative methodological framework employing a survey among government and non-governmental organizations catering to persons with disabilities in the Anglophone Caribbean to capture the data. In this paper, this researcher conducts an assessment of the major findings of the RDI in the context of building resilience among persons with disabilities in certain fundamental areas of Caribbean life. Findings relating to legislative protection, education, employment, public transportation, health care, and access to information are highlighted. The RDI, among other things, revealed that St. Vincent and the Grenadines is the top country in the Anglophone Caribbean in terms of their efforts to implement programmes and policies for persons with disabilities. We compare and contrast the findings regionally to that which is taking place in the global landscape for persons with disabilities.
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Champ-Rigot, Laure, Virginie Ferchaud, Jean-Noël Prévost, et al. "Rationale and Design for a Monocentric Prospective Study: Sleep Apnea Diagnosis Using a Novel Pacemaker Algorithm and Link With Aldosterone Plasma Level in Patients Presenting With Diastolic Dysfunction (SAPAAD Study)." Clinical Medicine Insights: Cardiology 12 (January 1, 2018): 117954681775162. http://dx.doi.org/10.1177/1179546817751628.
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Previous studies showed good agreement between pacemaker respiratory disturbance index (RDI) and polysomnography for diagnosis of severe sleep apnea (SA). The aim of this study is to investigate the diagnostic accuracy of RDI compared with apnea-hypopnea index (AHI) from a cardiorespiratory sleep study for the diagnosis of severe SA within patients requiring a pacemaker and meeting diastolic dysfunction criteria. Secondary objectives are as follows: correlation between plasma aldosterone level and SA severity, diagnostic accuracy of RDI for moderate SA, prevalence of SA among patients with diastolic dysfunction, occurrence of arrhythmias, and improvement of RDI with continuous positive airway pressure therapy. We designed a monocentric prospective nonrandomized study of prevalent cases to include 68 patients with a 6-month follow-up. Both RDI and AHI will be compared 2 months after implantation and after 1 month of continuous positive airway pressure treatment in patients with severe SA. This is the first study that examines diagnostic accuracy of pacemaker algorithm for the diagnosis of SA and correlation with plasma aldosterone levels in patients with diastolic dysfunction. Protocol version: V04. 04/04/2017 Trial registration: ClinicalTrials.gov NCT02751021
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Abbas, Adnan, Muhammad Waseem, Waheed Ullah, Chengyi Zhao, and Jianting Zhu. "Spatiotemporal Analysis of Meteorological and Hydrological Droughts and Their Propagations." Water 13, no. 16 (2021): 2237. http://dx.doi.org/10.3390/w13162237.
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The quantitative description of relationships and propagation between different forms of drought at multiple spatiotemporal scales in various geographical locations is informative for early drought warning systems. This study intends to evaluate the historical hydrometeorological drought from 1984–2015 in the Soan River Basin, which is a critical water source for the Pothwar region of Pakistan. The reconnaissance drought index (RDI) and standardized runoff index (SRI) are used to characterize meteorological and hydrological droughts, respectively. The spatiotemporal variations of the RDI and SRI demonstrated that 2000 and 2010 were extremely dry and wet years, respectively. The results further reveal that the frequency of hydrometeorological drought events was higher in a shorter time scale (3 and 6 months), while durations featured longer timescales (9 and 12 months). The RDI and SRI time series showed a significant decreasing trend in terms of the Mann–Kendal and Sen slope estimator (SSE) results. Cross-correlation analysis for RDI and SRI with a time lag acknowledged the existence of a sequence between the RDI and SRI and a positive relationship between the two indices. The findings of this study could be helpful for better understanding drought variability and water resource management.
Dissertations / Theses on the topic "Index RDI"
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Chattopadhyay, Somsubhra. "IMPACT OF CLIMATE CHANGE ON EXTREME HYDROLOGICAL EVENTS IN THE KENTUCKY RIVER BASIN." UKnowledge, 2017. http://uknowledge.uky.edu/bae_etds/50.
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Anthropogenic activities including urbanization, rapid industrialization, deforestation and burning of fossil fuels are broadly agreed on as primary causes for ongoing climate change. Scientists agree that climate change over the next century will continue to impact water resources with serious implications including storm surge flooding and a sea level rise projected for North America. To date, the majority of climate change studies conducted across the globe have been for large-sized watersheds; more attention is required to assess the impact of climate change on smaller watersheds, which can help to better frame sustainable water management strategies.
In the first of three studies described in this dissertation, trends in annual precipitation and air-temperature across the Commonwealth of Kentucky were evaluated using the non-parametric Mann-Kendall test considering meteorological time series data from 84 weather stations. Results indicated that while annual precipitation and mean annual temperature have been stable for most of Kentucky over the period 1950-2010, there is evidence of increases (averages of 4.1 mm/year increase in annual precipitation and 0.01 °C/year in mean annual temperature) along the borders of the Kentucky. Considered in its totality, available information indicates that climate change will occur – indeed, it is occurring – and while much of the state might not clearly indicate it at present, Kentucky will almost certainly not be exempt from its effects. Spatial analysis of the trend results indicated that eastern part of the state, which is characterized by relatively high elevations, has been experiencing decreasing trends in precipitation.
In the second study, trends and variability of seven extreme precipitation indices (total precipitation on wet days, PRCPTOT; maximum length of dry and wet periods, CDD and CWD, respectively; number of days with precipitation depth ≥20 mm, R20mm; maximum five-day precipitation depth, RX5day; simple daily precipitation intensity, SDII; and standardized precipitation index, SPI were analyzed for the Kentucky River Basin for both baseline period of 1986-2015 and the late-century time frame of 2070-2099. For the baseline period, the majority of the indices demonstrated increasing trends; however, statistically significant trends were found for only ~11% of station-index combinations of the 16 weather stations considered. Projected magnitudes for PRCPTOT, CDD, CWD, RX5day and SPI, indices associated with the macroweather regime, demonstrated general consistency with trends previously identified and indicated modest increases in PRCPTOT and CWD, slight decreases in CDD, mixed results for RX5day, and increased non-drought years in the late century relative to the baseline period. The study’s findings indicate that future conditions might be characterized by more rainy days but fewer large rainfall events; this might lead to a scenario of increased average annual rainfall but, at the same time, increased water scarcity during times of maximum demand.
In the third and final study, the potential impact of climate change on hydrologic processes and droughts over the Kentucky River basin was studied using the watershed model Soil and Water Assessment Tool (SWAT). The SWAT model was successfully calibrated and validated and then forced with forecasted precipitation and temperature outputs from a suite of CMIP5 global climate model (GCMs) corresponding to two different representative concentration pathways (RCP 4.5 and 8.5) for two time periods: 2036-2065 and 2070-2099, referred to as mid-century and late-century, respectively. Climate projections indicate that there will be modest increases in average annual precipitation and temperature in the future compared to the baseline (1976-2005) period. Monthly variations of water yield and surface runoff demonstrated an increasing trend in spring and autumn, while winter months are projected as having decreasing trends. In general, maximum drought length is expected to increase, while drought intensity might decrease under future climatic conditions. Hydrological droughts (reflective of water availability), however, are predicted to be less intense but more persistent than meteorological droughts (which are more reflective of only meteorological variables). Results of this study could be helpful for preparing any climate change adaptation plan to ensure sustainable water resources in the Kentucky River Basin.
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Espinola, Roger Humberto Castillo. "Indexing RDF data using materialized SPARQL queries." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2012. http://dx.doi.org/10.18452/16582.
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In dieser Arbeit schlagen wir die Verwendung von materialisierten Anfragen als Indexstruktur für RDF-Daten vor. Wir streben eine Reduktion der Bearbeitungszeit durch die Minimierung der Anzahl der Vergleiche zwischen Anfrage und RDF Datenmenge an. Darüberhinaus betonen wir die Rolle von Kostenmodellen und Indizes für die Auswahl eines efizienten Ausführungsplans in Abhängigkeit vom Workload. Wir geben einen Überblick über das Problem der Auswahl von materialisierten Anfragen in relationalen Datenbanken und diskutieren ihre Anwendung zur Optimierung der Anfrageverarbeitung. Wir stellen RDFMatView als Framework für SPARQL-Anfragen vor. RDFMatView benutzt materializierte Anfragen als Indizes und enthalt Algorithmen, um geeignete Indizes fur eine gegebene Anfrage zu finden und sie in Ausführungspläne zu integrieren. Die Auswahl eines effizienten Ausführungsplan ist das zweite Thema dieser Arbeit. Wir führen drei verschiedene Kostenmodelle für die Verarbeitung von SPARQL Anfragen ein. Ein detaillierter Vergleich der Kostmodelle zeigt, dass ein auf Index-- und Prädikat--Statistiken beruhendes Modell die genauesten Informationen liefert, um einen effizienten Ausführungsplan auszuwählen. Die Evaluation zeigt, dass unsere Methode die Anfragebearbeitungszeit im Vergleich zu unoptimierten SPARQL--Anfragen um mehrere Größenordnungen reduziert. Schließlich schlagen wir eine einfache, aber effektive Strategie für das Problem der Auswahl von materialisierten Anfragen über RDF-Daten vor. Ausgehend von einem bestimmten Workload werden algorithmisch diejenigen Indizes augewählt, die die Bearbeitungszeit des gesamten Workload minimieren sollen. Dann erstellen wir auf der Basis von Anfragemustern eine Menge von Index--Kandidaten und suchen in dieser Menge Zusammenhangskomponenten. Unsere Auswertung zeigt, dass unsere Methode zur Auswahl von Indizes im Vergleich zu anderen, die größten Einsparungen in der Anfragebearbeitungszeit liefert.<br>In this thesis, we propose to use materialized queries as a special index structure for RDF data. We strive to reduce the query processing time by minimizing the number of comparisons between the query and the RDF dataset. We also emphasize the role of cost models in the selection of execution plans as well as index sets for a given workload. We provide an overview of the materialized view selection problem in relational databases and discuss its application for optimization of query processing. We introduce RDFMatView, a framework for answering SPARQL queries using materialized views as indexes. We provide algorithms to discover those indexes that can be used to process a given query and we develop different strategies to integrate these views in query execution plans. The selection of an efficient execution plan states the topic of our second major contribution. We introduce three different cost models designed for SPARQL query processing with materialized views. A detailed comparison of these models reveals that a model based on index and predicate statistics provides the most accurate cost estimation. We show that selecting an execution plan using this cost model yields a reduction of processing time with several orders of magnitude compared to standard SPARQL query processing. Finally, we propose a simple yet effective strategy for the materialized view selection problem applied to RDF data. Based on a given workload of SPARQL queries we provide algorithms for selecting a set of indexes that minimizes the workload processing time. We create a candidate index by retrieving all connected components from query patterns. Our evaluation shows that using the set of suggested indexes usually achieves larger runtime savings than other index sets regarding the given workload.
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Hengen, Johanna, and Malin Petersson. "Utvärdering av röstbehandling med Rösthandikappindex (RHI)." Thesis, Linköpings universitet, Logopedi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-93473.
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Enligt Hälso- och sjukvårdslagens ska behandling systematiskt utvecklas och säkras (HSL, SFS 1982:763). Logopedisk röstbehandling är inte ett undantag. I ett samverkansprojekt mellan Linköpings Universitet och sydöstra sjukvårdsregionen deltog sex logopedmottagningar genom att låta patienter som erhöll röstbehandling att fylla i självskattningsformuläret Rösthandikappindex, RHI, vid behandlingsstart och behandlingsslut. Projektets mål var att fungera som en utgångspunkt för framtida, systematiska förbättringsarbeten beträffande röstbehandling. Denna studie har ett tvådelat syfte. Den ämnar undersöka om summan av deltagarnas RHI-skattningar förändrades efter genomgången röstbehandling och huruvida ålder, röstkrav inom yrket samt antalet behandlingstillfällen påverkade resultatet av skattningarna. Syftet med studien är också att, med hjälp av en enkät, undersöka yrkesverksamma logopeders inställning till RHI som verktyg för bedömning av röstproblematik och utvärdering av röstbehandling. Patientdata inkluderar resultaten från 350 patienters självskattningar. Enkätmaterialet innehåller svaren från 23 respondenter. Wilcoxon teckenrangtest visar en signifikant skillnad i RHI-poäng före (Md = 42) och efter (Md = 23) behandling med en genomsnittlig minskning av 19 medianpoäng i RHI-indexet med en observerat stor effektstyrka (.55). Den observerade differensen, både totalt och inom varje enskilt delområde, överstiger tidigare föreslagna gränsvärden för behandlingseffekt som angavs vid utvecklandet att VHI och RHI. Analyser av materialet visar att den vanligaste förekommande röstpatienten är en kvinna i 50-årsåldern med dysfoni. Förekomsten av olika diagnoser varierade stort mellan de deltagande regionerna. Hög ålder hos patienten påverkade medianvärdet på RHI vid behandlingsstart och behandlingsslut, men inte den observerade skillnaden mellan de två skattningarna. Beroende på vilken mottagning som tillhandahöll behandlingen observerades signifikanta skillnader i hur många behandlingstillfällen som gavs, hur lång behandlingsperioden blev och hur stor skillnaden i RHI-poäng var efter genomgången behandling. Utifrån enkätutskicket föreföll de deltagande logopederna generellt övervägande positiva till RHI som verktyg för att utvärdera röstproblematik och röstbehandling. En majoritet nämnde dock svagheter med RHI som utvärderingsredskap.<br>In accordance to the Swedish law of Health- and medical treatments, every intervention should systematically evolve and be improved in terms of safety (HSL, SFS 1982:763). Voice therapy is no exception. Six voice clinics participated in a collaborative project between Linköping University and the south-east hospital region by letting every patient receiving voice therapy complete the Swedish version of the Voice Handicap Index, RHI, at the beginning and end of their treatment. This study has a two-parted aim. The first aim of this study was to examine whether the sum of the participants’ scores on RHI changed after completed therapy and if gender, age, vocal strain within the occupation or the number of therapy sessions had an effect on their score. The second aim of the study was to construct a survey to analyze working speech-language pathologist’s views on RHI as a tool for evaluating voice problems and voice therapy. The material from the survey consisted of the answers from 23 respondents. The patient data includes the results from 350 patients’ scores. Analysis of the data reveals that the typical voice patient is a woman in her fifties with the diagnosis dysphonia. The prevalence of certain diagnoses varies greatly between the participating voice clinics. Wilcoxon sign rank test points to a significant difference in RHI-scores before (MD = 42) and after (MD = 23) therapy with an average decrease of 19 median points in the RHI-index with a substantial observed effect size (.55). The observed difference surpasses the previously suggested threshold limit for clear intervention effect during the development of VHI and RHI. Age had a significant effect on the median score of RHI at the start and end of therapy, but the observed difference between the two measurements were not affected. Differences could be observed between the voice clinics regarding the average number of therapeutic appointments, the average length of the therapy and the average difference in RHI-scores after completed therapy. From the responses in the survey, the participating SLPs were generally predominately positive to the idea of RHI as a tool for evaluating voice problems and voice therapy. The majority of the respondents did however mention weaknesses in RHI when used as a tool for evaluation.
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Picalausa, Francois. "Guarded structural indexes: theory and application to relational RDF databases." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209432.
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Ces dernières années ont vu un regain d’intérêt dans l’utilisation de données semi-structurées, grâce à la standardisation de formats d’échange de données sur le Web tels que XML et RDF. On notera en particulier le Linking Open Data Project qui comptait plus de 31 milliard de triplets RDF à la fin de l’année 2011. XML reste, pour sa part, l’un des formats de données privilégié de nombreuses bases de données de grandes tailles dont Uniprot, Open Government Initiative et Penn Treebank. <p><p>Cet accroissement du volume de données semi-structurées a suscité un intérêt croissant pour le développement de bases de données adaptées. Parmi les différentes approches proposées, on peut distinguer les approches relationnelles et les approches graphes, comme détaillé au Chapitre 3. Les premières visent à exploiter les moteurs de bases de données relationnelles existants, en y intégrant des techniques spécialisées. Les secondes voient les données semistructurées comme des graphes, c’est-à-dire un ensemble de noeuds liés entre eux par des arêtes étiquetées, dont elles exploitent la structure. L’une des techniques de ce domaine, connue sous le nom d’indexation structurelle, vise à résumer les graphes de données, de sorte à pouvoir identifier rapidement les données utiles au traitement d’une requête.<p><p>Les index structurels classiques sont construits sur base des notions de simulation et de bisimulation sur des graphes. Ces notions, qui sont d’usage dans de nombreux domaines tels que la vérification, la sécurité, et le stockage de données, sont des relations sur les noeuds des graphes. Fondamentalement, ces notions caractérisent le fait que deux noeuds partagent certaines caractéristiques telles qu’un même voisinage. <p><p>Bien que les approches graphes soient efficaces en pratique, elles présentent des limitations dans le cadre de RDF et son langage de requêtes SPARQL. Les étiquettes sont, dans cette optique, distinctes des noeuds du graphe .Dans le modèle décrit par RDF et supporté par SPARQL, les étiquettes et noeuds font néanmoins partie du même ensemble. C’est pourquoi, les approches graphes ne supportent qu’un sous-ensemble des requêtes SPARQL. Au contraire, les approches relationnelles sont fidèles au modèle RDF, et peuvent répondre au différentes requêtes SPARQL. <p><p>La question à laquelle nous souhaitons répondre dans cette thèse est de savoir si les approches relationnelles et graphes sont incompatible, ou s’il est possible de les combiner de manière avantageuse. En particulier, il serait souhaitable de pouvoir conserver la performance des approches graphe, et la généralité des approches relationnelles. Dans ce cadre, nous réalisons un index structurel adapté aux données relationnelles. <p><p>Nous nous basons sur une méthodologie décrite par Fletcher et ses coauteurs pour la conception d’index structurels. Cette méthodologie repose sur trois composants principaux. Un premier composant est une caractérisation dite structurelle du langage de requêtes à supporter. Il s’agit ici de pouvoir identifier les données qui sont retournées en même temps par n’importe quelle requête du langage aussi précisément que possible. Un second composant est un algorithme qui doit permettre de grouper efficacement les données qui sont retournées en même temps, d’après la caractérisation structurelle. Le troisième composant est l’index en tant que tel. Il s’agit d’une structure de données qui doit permettre d’identifier les groupes de données, générés par l’algorithme précédent pour répondre aux requêtes. <p><p>Dans un premier temps, il faut remarquer que le langage SPARQL pris dans sa totalité ne se prête pas à la réalisation d’index structurels efficaces. En effet, le fondement des requêtes SPARQL se situe dans l’expression de requêtes conjonctives. La caractérisation structurelle des requêtes conjonctives est connue, mais ne se prête pas à la construction d’algorithmes efficaces pour le groupement. Néanmoins, l’étude empirique des requêtes SPARQL posées en pratique que nous réalisons au Chapitre 5 montre que celles-ci sont principalement des requêtes conjonctives acycliques. Les requêtes conjonctives acycliques sont connues dans la littérature pour admettre des algorithmes d’évaluation efficaces. <p><p>Le premier composant de notre index structurel, introduit au Chapitre<p>6, est une caractérisation des requêtes conjonctives acycliques. Cette<p>caractérisation est faite en termes de guarded simulation. Pour les graphes la<p>notion de simulation est une version restreinte de la notion de bisimulation.<p>Similairement, nous introduisons la notion de guarded simulation comme une<p>restriction de la notion de guarded bisimulation, une extension connue de la<p>notion de bisimulation aux données relationelles. <p><p>Le Chapitre 7 offre un second composant de notre index structurel. Ce composant est une structure de données appelée guarded structural index qui supporte le traitement de requêtes conjonctives quelconques. Nous montrons que, couplé à la caractérisation structurelle précédente, cet index permet d’identifier de manière optimale les données utiles au traitement de requêtes conjonctives acycliques. <p><p>Le Chapitre 8 constitue le troisième composant de notre index structurel et propose des méthodes efficaces pour calculer la notion de guarded simulation. Notre algorithme consiste essentiellement en une transformation d’une base de données en un graphe particulier, sur lequel les notions de simulation et guarded simulation correspondent. Il devient alors possible de réutiliser les algorithmes existants pour calculer des relations de simulation. <p><p>Si les chapitres précédents définissent une base nécessaire pour un index structurel visant les données relationnelles, ils n’intègrent pas encore cet index dans le contexte d’un moteur de bases de données relationnelles. C’est ce que propose le Chapitre 9, en développant des méthodes qui permettent de prendre en compte l’index durant le traitement d’une requête SPARQL. Des résultats expérimentaux probants complètent cette étude. <p><p>Ce travail apporte donc une première réponse positive à la question de savoir s’il est possible de combiner de manière avantageuse les approches relationnelles et graphes de stockage de données RDF.<p><br>Doctorat en Sciences de l'ingénieur<br>info:eu-repo/semantics/nonPublished
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Salinas, Rivas Sergio Fernando Pedro. "El impacto regulatorio del nuevo RAI en el mercado de intermediación bursátil : ¿sobrecostos versus transparencia?" IUS ET VERITAS, 2015. http://repositorio.pucp.edu.pe/index/handle/123456789/123669.
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Nebeker, Adams Cara Ann. "The Development of a Reliable Change Index and Cutoff for the SCORE-15." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7694.
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The Systemic Clinical Outcome and Routine Evaluation version 15 (SCORE-15) is an assessment used to assess for clinical change in family functioning. The SCORE-15 has been demonstrated in the past to be a reliable and valid measure for assessing for clinical change and is largely used throughout the UK. However, the SCORE-15 lacks the ability to determine whether an individual's change in family functioning is clinically significant. This study aims to establish a reliable change index and clinical cutoff score based on a US sample so that researchers and clinicians can determine clinically significant change. A sample of 63 clinical participants and 244 community participants completed the SCORE-15, including 165 community participants who completed the SCORE-15 a second time. Results established a cutoff of 51.92 and a reliable change index of 17.51 for the SCORE-15. This indicates that therapy clients who improve their SCORE-15 score by at least 17.5 points and who cross the threshold of 52 during the course of therapy are considered to have experienced clinical significant improvement.
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Ojeda, Meléndez José Eduardo. "Proyecto de Interconexión entre el nodo de telefónica y el cliente mediante un radioenlace." Bachelor's thesis, Universidad Ricardo Palma. Programa Cybertesis PERÚ, 2008. http://cybertesis.urp.edu.pe/urp/2008/ojeda_je/html/index-frames.html.
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Ozdemir, Mustafa. "A Probabilistic Schedule Delay Analysis In Construction Projects By Using Fuzzy Logic Incorporated With Relative Importance Index (rii) Method." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612169/index.pdf.
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The aim of this thesis is to propose a decision support tool for contractors before the bidding stage to quantify the probability of schedule delay in construction projects by using fuzzy logic incorporated with relative importance index (RII) method. Eighty three (83) different schedule delay factors were identified through detailed literature review and interview with experts from a leading Turkish construction company, then categorized into nine (9) groups and visualized by utilizing Ishikawa (Fish Bone) Diagrams. The relative importances of schedule delay factors were quantified by relative importance index (RII) method and the ranking of the factors and groups were demonstrated according to their importance level on schedule delay. A schedule delay assessment model was proposed by using Fuzzy Theory in order to determine a realistic time contingency by taking into account of delay factors characterized in construction projects. The assessment model was developed by using Fuzzy Logic Toolbox of the MATLAB Program Software. Proposed methodology was tested in a real case study and probability of schedule delay was evaluated by the assessment model after the required inputs were inserted to software. According to the case study results, the most contributing factors and groups (that need attention) to the probability of schedule delays were discussed. The assessment model results were found to be conceivably acceptable and adequate for the purpose of this thesis.
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Bylund, Hanna, and Sofie Eriksson. "Översättning och validering av pVHI : för barn 6 till 10 år." Thesis, Linköping University, Speech and Language Pathology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57306.
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<p>Studies indicate that between 6-9% of all children has some type of voice problems. Voice problems in children may have different etiology and can affect all ages. In Sweden, there is a lack of a standardized questionnaire addressed to children with voice problems and their legal guardians. The purpose of this study was to translate and validate the Pediatric Voice Handicap Index (pVHI) in Swedish children aged 6 to 10 years. The study was carried out through an internet-based assessment form for children referred to speech and language pathologist/ phoniatrican due to voice disorders in Sweden and a matched control group of children without voice problems. The experimental group consisted of 13 children with voice problems and the control group of 29 children. The questionnaire was filled out by the guardian in cooperation with the child. It contained 23 claims separated into three domains: functional, physical and emotional. The results of each child’s assessment were the total pVHI, with a maximum of 92 points. A comparison between results presented in the original pVHI showed great similarities regarding mean values within the three domains the total pVHI and the experimental group’s estimation of over- all voice problems on a VAS- scale. The internal validity of the translation was high with a Cronbach´s alpha at .95- .96 within the different domains. Significant differences were found between the experimental group and the control group in each domain. There was also a significant difference between the experimental group and the control group regarding total pVHI. The results indicate that the translation of pVHI is easy to fill out and close to the original. Also, it discriminates between children with and without voice disorders indicating good sensitivity and specificity, which is central in a broader use.</p><br><p>Studier visar att mellan 6- 9 % av alla barn har någon form av röstproblem. Röstproblem hos barn kan ha olika etiologi och kan drabba alla åldrar. I Sverige har ett standardiserat skattningsformulär riktat till barn med röstproblem och dess målsmän saknats. Syftet med föreliggande studie var att översätta och validera pediatric Voice Handicap Index (pVHI) för svenska barn mellan 6 till 10 år. Studien utfördes genom ett internetbaserat skattningsformulär till barn med målsmän som sökt hjälp för röstbesvär hos logoped/foniater i Sverige samt en matchad kontrollgrupp utan uttalade röstproblem. Experimentgruppen bestod av 13 barn med röstproblem och kontrollgruppen av 29 barn. Skattningsformuläret fylldes i av målsmän i samråd med barnet. Det innehöll 23 påståenden fördelade inom tre domäner; funktionell, kroppslig och emotionell. Sammantagna resultatet av varje barns skattning utgjorde ett total pVHI där 92 var maxpoäng. Vid jämförelser mellan resultaten i den ursprungliga pVHI och föreliggande studie återfanns stora likheter på medelvärden inom de tre domänerna, för total pVHI och för experimentgruppens skattning av omfattning av deras röstproblem på en VAS-skala. Den interna validiteten av den översatta svenska versionen var hög med ett Cronbach's alfa på .95 till .96 inom de olika domänerna. Signifikant skillnad återfanns mellan experimentgrupp och kontrollgrupp inom varje domän. Det var även signifikant skillnad mellan experimentgruppen och kontrollgruppens total- pVHI. Resultaten i föreliggande studie tyder på att översättningen av pVHI var nära den ursprungliga versionen. Dessutom diskriminerar översättningen mellan barn med och utan röstproblem vilket indikerar på god sensitivitet och specificitet, något som är centralt för en bredare användning.</p>
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Guzmán, Maldonado Rocío Bertha. "Caracterización del macizo rocoso en los túneles Huarihuanca, Rancas y Sahuay según los sistemas Rmi y GSI." Universidad Nacional de Ingeniería. Programa Cybertesis PERÚ, 2009. http://cybertesis.uni.edu.pe/uni/2009/guzman_rm/html/index-frames.html.
Full textBooks on the topic "Index RDI"
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C, Mollan R. Nostri plena laboris: An author index to the RDS scientific journals, 1800-1985. Royal Dublin Society, 1987.
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La-dwags Ain-ji Ur-rdu tshig mdzod =: Ladakhi-English-Urdu dictionary : with an English-Ladakhi index. Melong Publications, 1998.
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Aust, Emil. De aedibus sacris populi Romani inde a primis liberae Rei publicae temporibus usque ad Augusti imperatoris aetatem Romae conditis. Typis Friederici Soemmering, 1991.
Find full textBook chapters on the topic "Index RDI"
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Doyle, D. John. "Renal Failure Index (RFI)." In Computer Programs in Clinical and Laboratory Medicine. Springer New York, 1989. http://dx.doi.org/10.1007/978-1-4612-3576-7_19.
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Amato, F., F. Gargiulo, A. Mazzeo, V. Moscato, and A. Picariello. "An RDF-Based Semantic Index." In Natural Language Processing and Information Systems. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38824-8_31.
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Cappellari, Paolo, Roberto De Virgilio, Antonio Maccioni, and Mark Roantree. "A Path-Oriented RDF Index for Keyword Search Query Processing." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23091-2_31.
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Lyu, Xuedong, Xin Wang, Yuan-Fang Li, and Zhiyong Feng. "FFD-Index: An Efficient Indexing Scheme for Star Subgraph Matching on Large RDF Graphs." In Database Systems for Advanced Applications. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-22324-7_22.
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Sharma, Garima, and Rajiv Nandan Rai. "A Modified FMEA Model with Repair Effectiveness Index (REI) Using Fuzzy AHP for Life Support Systems of Space Stations." In Advances in Human Error, Reliability, Resilience, and Performance. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-94391-6_8.
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"Rural Development Index (RDI)." In Encyclopedia of Quality of Life and Well-Being Research. Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-0753-5_103599.
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Klarsfeld, Alain, Jawad Syed, and Areeba Mumtaz. "An analysis of Religious Diversity Index (RDI) by Pew Research Center." In Handbook on Diversity and Inclusion Indices. Edward Elgar Publishing, 2021. http://dx.doi.org/10.4337/9781788975728.00027.
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O. Freeze, Thomas, Tien M. Nguyen, and Charles H. Lee. "System-of-Systems Enterprise CONOPS Assessment Decision Support Tools." In Systems of Systems - Engineering, Modeling, Simulation and Analysis [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94123.
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This chapter discusses the implementation of System-of-Systems Enterprise Architecture (SOSEA) CONOPS assessment framework and models in Matlab, and presents preliminary results concerning SOSEA resiliency in the presence of a notional Radio Frequency Interference (RFI) scenario. The chapter provides an overview of the SOSEA CONOPS Assessment Framework, and discusses related SOS Resiliency Models including Resilient Assessment Index Against RFI (RAI-RFI), Spectrum Resiliency Assessment Index (SRAI), and Resilient Capacity (RC).
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"Index." In Recycling derelict land. Thomas Telford Publishing, 1991. http://dx.doi.org/10.1680/rdl.13186.bm.
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"Index." In The RRI Challenge. John Wiley & Sons, Inc., 2019. http://dx.doi.org/10.1002/9781119616122.index.
Full textConference papers on the topic "Index RDI"
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Kouřilová, Jana, Martina Kubíková, and Martin Pělucha. "Digitalizace jako předpoklad regionální konkurenceschopnosti? Analýza disparit na příkladu ČR." In XXIV. mezinárodního kolokvia o regionálních vědách. Masaryk University Press, 2021. http://dx.doi.org/10.5817/cz.muni.p210-9896-2021-9.
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The paper focuses on regional competitiveness in relation to the level of digitization putted by the Regional Digitization Index (RDI), which was created by the authors of this paper. This index is inspired by the internationally recognized Digital Economy and Society Index (DESI), which compares the level of the digital economy of the EU member states. However, it does not enable to identify interregional disparities in the process of the territory digitization. The aim of the paper is to compare regional competitiveness, determined by the Regional Competitiveness Index (RCI), and the level of digitization expressed by the Regional Digitization Index. The research question is whether a higher RDI value implies a higher RCI level. The emphasis is given especially on regions defined according to the EUROSTAT methodology (2018) as predominantly rural, i.e., Plzeňský, Jihočeský, Vysočina and Pardubický regions. The results, except for the Capital City of Prague, do not confirm this implication, especially if we focus on predominantly rural regions. According to the RCI, Plzeňský and Vysočina regions belong to the regions with high dynamics of development and Pardubický and Jihočeský regions to the regions with average dynamics of development. According to the RDI, Pardubický, Vysočina and Jihočeský regions rank among regions with lower dynamics of digital development and the Plzeňský region falls into the "worst" group of regions with problematic development of digitization.
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Fujita, Etsuo, Mayumi Sonekatsu, Naonori Hayashi, et al. "MAS Is Effective Even In Cases Of Low RDI Sleep Apnea Syndrome Evaluated Based On The Rotman Index (FEV1/PEF)." In American Thoracic Society 2012 International Conference, May 18-23, 2012 • San Francisco, California. American Thoracic Society, 2012. http://dx.doi.org/10.1164/ajrccm-conference.2012.185.1_meetingabstracts.a6464.
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Bogan, Richard K., and JoAnne T. Turner. "Correlates Of Body Mass Index (BMI), Respiratory Disturbance Index (RDI), And Epworth Sleepiness Scale Scores (ESS) In An Out-Patient Sleep Population Of Patients Undergoing Baseline Polysomnography (PSG): A Retrospective Analysis Of 100,569 Patients." In American Thoracic Society 2011 International Conference, May 13-18, 2011 • Denver Colorado. American Thoracic Society, 2011. http://dx.doi.org/10.1164/ajrccm-conference.2011.183.1_meetingabstracts.a2235.
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Madden, Andrew J., Sumit Rawal, Kevin Chu, et al. "Abstract 3355: Evaluation of the efficiency of tumor and tissue delivery of carrier mediated agents (CMA) and small molecule (SM) agents in mice using a novel pharmacokinetic (PK) metric relative distribution index over time (RDI-OT)." In Proceedings: AACR 104th Annual Meeting 2013; Apr 6-10, 2013; Washington, DC. American Association for Cancer Research, 2013. http://dx.doi.org/10.1158/1538-7445.am2013-3355.
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Seymour, Mark J., and Magnus K. Herrlin. "Data Center Optimization Using Performance Metrics." In ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ipack2015-48400.
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Data centers are rapidly growing in size and number and consume an increasing and also significant proportion of energy production. Yet, their mission critical nature means they are constructed and operated at almost any cost. The data center industry is becoming more aware of the need to manage energy alongside managing capacity and availability. A vital element — and one that cannot be ignored — is how well cooling is delivered to IT equipment. Monitoring allows you to understand how well you are currently operating and whether you are within acceptable bounds. Meanwhile, simulation of the airflow and heat transfer allows you to predict future performance and understand current and future cooling issues. The challenge with both approaches is that they provide large volumes of data and interpretation can become a challenging task. Consider two scenarios: i. One configuration results in a lot of ‘hot spots’ in the data center, resulting in equipment permanently operating in the ASHRAE Allowable range for intake air temperature. ii. A second configuration has one ‘hot spot’ where equipment is operating above the ASHRAE Allowable range, but the remainder is within the ASHRAE Recommended range. Which is better? One solution is to use metrics to help understand the performance. However, existing metrics are not always well known and understood. The only metric that is currently in common use is Power Usage Effectiveness (PUE). While PUE is useful as a measure of data center cooling efficiency, it does not address the cool air delivery effectiveness within the IT space. However, high-level cooling delivery metrics such as Rack Cooling Index (RCI), Return Temperature Index (RTI), Supply Heat Index (SHI), and Return Heat Index (RHI) have been recognized for producing key information but are not as widely used as they could be. Other metrics have been developed that give more detailed understanding of delivery performance. Capture Index, or more specifically Cold Aisle Capture Index (CACI) and Hot Aisle Capture Index (HACI) provide a measure of whether cooling systems targeting specific equipment work effectively. Simulation also allows diagnostic performance ‘measurement’ with detailed indices such as Rack and Room Recirculation. Since data center airflow is complex, this paper uses case studies to show how using metrics provides a rapid insight into both performance and what might need to be addressed to improve and optimize performance.
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"RFI 2019 Author Index." In 2019 RFI Workshop - Coexisting with Radio Frequency Interference (RFI). IEEE, 2019. http://dx.doi.org/10.23919/rfi48793.2019.9111665.
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"Authors index." In 2016 Radio Frequency Interference (RFI). IEEE, 2016. http://dx.doi.org/10.1109/rfint.2016.7833520.
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YounHee Kim, ByungGon Kim, and HaeChull Lim. "The index organizations for RDF and RDF schema." In 8th International Conference on Advanced Communication Technology. IEEE, 2006. http://dx.doi.org/10.1109/icact.2006.206357.
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Liu, Baolin, and Bo Hu. "Path Queries Based RDF Index." In 2005 First International Conference on Semantics, Knowledge and Grid. IEEE, 2005. http://dx.doi.org/10.1109/skg.2005.100.
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"Index Subject." In 2017 5th RSI International Conference on Robotics and Mechatronics (ICRoM). IEEE, 2017. http://dx.doi.org/10.1109/icrom.2017.8466149.
Full textReports on the topic "Index RDI"
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Hamill, Daniel D., Jeremy J. Giovando, Chandler S. Engel, Travis A. Dahl, and Michael D. Bartles. Application of a Radiation-Derived Temperature Index Model to the Willow Creek Watershed in Idaho, USA. U.S. Army Engineer Research and Development Center, 2021. http://dx.doi.org/10.21079/11681/41360.
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The ability to simulate snow accumulation and melting processes is fundamental to developing real-time hydrological models in watersheds with a snowmelt-dominated flow regime. A primary source of uncertainty with this model development approach is the subjectivity related to which historical periods to use and how to combine parameters from multiple calibration events. The Hydrologic Engineering Center, Hydrological Modeling System, has recently implemented a hybrid temperature index (TI) snow module that has not been extensively tested. This study evaluates a radiatative temperature index (RTI) model’s performance relative to the traditional air TI model. The TI model for Willow Creek performed reasonably well in both the calibration and validation years. The results of the RTI calibration and validation simulations resulted in additional questions related to how best to parameterize this snow model. An RTI parameter sensitivity analysis indicates that the choice of calibration years will have a substantial impact on the parameters and thus the streamflow results. Based on the analysis completed in this study, further refinement and verification of the RTI model calculations are required before an objective comparison with the TI model can be completed.
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Lee, Jusang, John E. Haddock, Dario D. Batioja Alvarez, and Reyhaneh Rahbar Rastegar. Quality Control and Quality Assurance of Asphalt Mixtures Using Laboratory Rutting and Cracking Tests. Purdue University, 2019. http://dx.doi.org/10.5703/1288284317087.
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The main objectives of this project were to review the available balanced-mix design (BMD) methodologies, understand the I-FIT and Hamburg Wheel Tracking Test (HWTT) test methods using INDOT asphalt mixtures, and to explore the application of these tests to both a BMD approach and as performance-related Quality Control (QC) and Quality Acceptance (QA) methods. Two QA mixture specimen types, plant-mixed laboratory-compacted (PMLC) and plant-mixed field-compacted (PMFC) were used in the determination of cracking and rutting parameters. Distribution functions for the flexibility index (FI) values and rutting parameters were determined for various mixture types. The effects of specimen geometry and air voids contents on the calculated Flexibility Index (FI) and rutting parameters were investigated. The fatigue characteristics of selected asphalt mixtures were determined using the S-VECD test according to different FI levels for different conditions. A typical full-depth pavement section was implemented in FlexPAVE to explore the cracking characteristics of INDOT asphalt mixtures by investigating the relationship between the FI values of QA samples with the FlexPAVE pavement performance predictions. The FI values obtained from PMFC specimens were consistently higher than their corresponding PMLC specimens. This study also found that FI values were affected significantly by variations in specimen thickness and air voids contents, having higher FI values with higher air voids contents and thinner specimens. These observations do not agree with the general material-performance expectations that better cracking resistance is achieved with lower air voids content and thicker layers. Additionally, PG 70-22 mixtures show the lowest mean FI values followed by the PG 76-22 and 64-22 mixtures. The same order was observed from the ΔTc (asphalt binder cracking index) of INDOT’s 2017 and 2018 projects. Finally, it was found that the HWTT showed reasonable sensitivity to the different characteristics (e.g., aggregate sizes, binder types, and air voids contents) of asphalt mixtures. Mixtures containing modified asphalt binders showed better rut resistance and higher Rutting Resistance Index (RRI) than those containing unmodified binders.
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Piper, Benjamin, Yasmin Sitabkhan, Jessica Mejia, and Kellie Betts. Effectiveness of Teachers’ Guides in the Global South: Scripting, Learning Outcomes, and Classroom Utilization. RTI Press, 2018. http://dx.doi.org/10.3768/rtipress.2018.op.0053.1805.
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This report presents the results of RTI International Education’s study on teachers' guides across 13 countries and 19 projects. Using quantitative and qualitative methods, we examine how teachers’ guides across the projects differ and find substantial variation in the design and structure of the documents. We develop a scripting index so that the scripting levels of the guides can be compared across projects. The impact results of the programs that use teachers’ guides show significant impacts on learning outcomes, associated with approximately an additional half year of learning, showing that structured teachers’ guides contribute to improved learning outcomes. During observations, we find that teachers make a variety of changes in their classroom instruction from how the guides are written, showing that the utilization of structured teachers’ guides do not create robotic teachers unable to use their own professional skills to teach children. Unfortunately, many changes that teachers make reduce the amount of group work and interactivity that was described in the guides, suggesting that programs should encourage teachers to more heavily utilize the instructional routines designed in the guide. The report includes a set of research-based guidelines that material developers can use to develop teachers’ guides that will support effective instructional practices and help improve learning outcomes. The key takeaway from the report is that structured teachers' guides improve learning outcomes, but that overly scripted teachers' guides are somewhat less effective than simplified teachers' guides that give specific guidance to the teacher but are not written word for word for each lesson in the guide.
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HYSTERETIC PERFORMANCE OF WEAK-AXIS CONNECTION WITH I-SHAPED PLATES IN STEEL FRAME. The Hong Kong Institute of Steel Construction, 2021. http://dx.doi.org/10.18057/ijasc.2021.17.3.1.
Full textAbstract:
This paper elucidates numerically the behavior of weak-axis moment connections proposed by welding I-shaped plates in the H-section column to increase connection strength and ductility in steel frame. After validating the numerical methods through comparing the results of numerical analysis and experiments, the effectiveness of the proposed weak-axis connection were examined through comparing to the traditional weak-axis connection. The proposed weak-axis connection could move the highest stresses away from the start-stop points of a weld, and thus preventing the premature brittle fracture of the beam flange welds. The plastic hinge formed away from the beam-column interface, while the local buckling occurred in the weld access holes region in the traditional weak-axis connection. The proposed weak-axis connections can be classified as rigid in a strong-bracing system, and be classified as semi-rigid in weak-supported or unsupported system. And then a series of parametric studies was conducted to better understand the behavior of proposed weak-axis moment connections. The force-displacement relationships, location of the plastic hinge, Mises index (MI), triaxiality index (TI) and rupture index (RI) distributions at the beam flange welds were reported in detail. According to the numerical analysis, the design variables of I-shaped plates and widened flange plate are suggested, along with a design procedure.