Miracle-dz/UniFAR-FTUs huggingface dataset:
Thermoacoustic Oscillations in an Annular Combustor

Lean premixed prevaporised (LPP) combustion can reduce NOx emissions from gas turbines, but often leads to combustion instability. Acoustic waves produce fluctuations in heat release, for instance by perturbing the fuel–air ratio or flame shape. These heat fluctuations will in turn generate more acoustic waves and in some situations self-sustained oscillations can result.A linear model for thermoacoustic oscillations in LPP combustors is described. A thin annular combustor is assumed and so circumferential modes are included but radial dependence is ignored. The geometry consists of straight ducts joined by short regions of area change. Perturbations to the flow can be thought of as a combination of acoustic, entropy and vorticity waves. The development of these waves along the straight ducts is found using a propagation matrix approach. At the entrance to the combustion chamber, a flame model is used in which the unsteady heat release is related to fluctuations in fuel–air ratio. Various possible inlet and outlet conditions are described. The model is then applied to a simplified example based on a sector rig. The resonant modes are found numerically and compared with the frequencies that occurred in experiments.Copyright © 2001 by ASME
Clinical outcome and risk factors of patients with suspected pneumonia in Southwest district of Ethiopia, 2020: A retrospective study

Acute respiratory infections (ARIs), especially pneumonia, remain the leading cause of childhood mortality and the most common reason for adult hospitalization in low- and middle-income countries, despite advances in preventative and management strategies. This study was conducted to assess factors associated with poor clinical outcome of suspected pneumonia cases among hospitalized patients at the three public health hospitals in Southwest district of Ethiopia. A cross-sectional study was conducted from May to July, 2020. Those patients admitted with suspected pneumonia were followed up during their hospital stay, and data on outcomes were captured by study nurses. Socio-demographics, clinical features, and follow-up data were gathered, and analyzed using SPSS versions 20.0. The differences in patients’ outcome in relation to their clinical features and epidemiologically linked exposures were described and compared using chi-square tests at 95% confident intervals. In this study, 742 patients with suspected pneumonia were analyzed. Of these, 473 (62.8%) of them were male, and 264 (35.6%) were of age 1–4 years. About 533 (71.8%) patients with suspected pneumonia were presented with irregular respiratory signs/symptoms (more than one symptoms) and 132 (17.9%) had underline illnesses. About 633 (85.4%) of patients were improved after treatment, and 109 (14.7%) of them ended with poor clinical outcome after completion of their treatment. Age of the patients and presence of comorbid conditions such as HIV/AIDS infections and bronchial asthma were identified as the risk factors for poor outcome of patients with suspected pneumonia. The clinical outcome of patients with suspected pneumonia at the three hospitals in Southwest district of Ethiopia was not satisfactory. Our findings highlight that in order to reduce poor clinical outcome related to suspected pneumonia, the efforts should be focused on some factors like management and prevention of chronic comorbidities. Increasing clinicians’ awareness on early management of suspected pneumonia cases is also essential in reducing the burden of the disease.
Mental Imagery in Air Traffic Control

Mental imagery is known to play a significant role in the skilled performance of complex cognitive tasks, yet is mostly overlooked in the field of air traffic control—a task that is reliant on what controllers term “the picture. ” This article explores 3 strands of imagery research: the similarities between imagery and perception, individual differences in imagery, and skill learning and imagery. The research reported is discussed in terms of fundamental implications for air traffic control, implications for the measurement of imagery, implications for training, and implications for technology design.
Modern Approaches to Analysis of Technical and Tactical Actions of Skilled Volleyball Players

Purpose. To develop an algorithm of special analysis for improving the training process, based on the identification of indicators of technical and tactical actions in the competitive activity of skilled volleyball players. Material and Methods. The study analyzed 2,688 technical and tactical indicators of the competitive activity of 56 players of national volleyball teams which played 6 games in the 2019 CEV Volleyball European Championship, taking into account the athletes’ playing roles, based on the methods of analysis of the competitive activity, analysis of generalization of practical experience, and theoretical modeling. Results. The study interpreted the total performance indicators of the competitive activity of skilled volleyball players, the indicators of technical and tactical activity in the competitive process, the ratio of performance indicators in skilled volleyball players in position zones. Conclusions. The modified algorithm of special analysis of indicators of technical and tactical actions has the following structure: analysis of quantitative characteristics of team, group and individual actions in attack and defense; chronological analysis of the competitive activity development in sets; analysis of playing actions in various zones of the court; comparative analysis of quantitative indicators of technical and tactical actions of volleyball players who directly counteract in the match; analysis of critical moments of the game, which is directly related to organizing and holding a particular match; interpretation and qualitative analysis of indicators of technical and tactical actions in a particular match. Based on the analysis of success and performance indicators of the competitive activity of Ukraine’s national volleyball team in the qualifying tournament of the 2019 European Championship (group F), it can be said that the modified algorithm of special analysis of indicators of technical and tactical actions showed high efficiency.
Drivers of Change of Thwaites Glacier, West Antarctica, Between 1995 and 2015

Using three independent ice‐flow models and several satellite‐based datasets, we assess the importance of correctly capturing ice‐shelf breakup, shelf thinning, and reduction in basal traction from ungrounding in reproducing observed speed‐up and thinning of Thwaites Glacier between 1995 and 2015. We run several transient numerical simulations applying these three perturbations individually. Our results show that ocean‐induced ice‐shelf thinning generates most of the observed grounding line retreat, inland speed‐up, and mass loss, in agreement with previous work. We improve the agreement with observed inland speed‐up and thinning by prescribing changes in ice‐shelf geometry and a reduction in basal traction over areas that became ungrounded since 1995, suggesting that shelf breakups and thinning‐induced reduction in basal traction play a critical role on Thwaites's dynamics, as pointed out by previous studies. These findings suggest that modeling Thwaites's future requires reliable ocean‐induced melt estimates in models that respond accurately to downstream perturbations.
The Sexual Grooming Scale – Victim Version: The Development and Pilot Testing of a Measure to Assess the Nature and Extent of Child Sexual Grooming

ABSTRACT Sexual grooming has been deemed an integral component of child sexual abuse (CSA). However, the nature and extent of sexual grooming remains understudied in large part because an empirically-validated scale for child sexual grooming has yet to be developed. We developed the Sexual Grooming Scale – Victim Version (SGS-V) to assess the stages and behaviors described in the content-validated Sexual Grooming Model from a victim’s perspective. The SGS-V was pilot tested with 115 adult victims of CSA. Overall, results supported the feasibility in terms of implementation and its limited-efficacy. The implications for prevention, investigation, treatment, and research are discussed.
Teaching Quality and Students' EFL Achievements in Ethiopia: Analysis From the Perspective of the Basic Dimensions of Teaching Quality

Teaching quality is important for students’ English as a Foreign Language (EFL) Achievements. The three basic dimensions of teaching quality (student support, classroom management, and cognitive activation) showed effectiveness in some subjects in developed countries, but there is very little investigation on its effectiveness in developing ones. Using hierarchical linear modeling and re-centered influence function regression, this study investigates the extent to which the three basic dimensions of teaching quality affect students’ EFL achievements and how much the effect varies across achievement distributions in the context of Ethiopia. Findings reveal that classroom management does not affect students’ EFL achievements and this is consistent across achievement distributions. However, cognitive activation positively affects students’ EFL learning achievements and the effect is consistent across the distribution of achievements. Similarly, student support affects students’ EFL achievements positively, but its effect is higher for high-achieving students. Implications of the findings were discussed.
Gender Determination Using Mandibular Angle Measurement in Iranian Adult Graphics in a Dental Center

Background: The mandibular bone is affected by age, metabolic activity, and hormonal changes. Objectives: This study aimed to determine the sex determination using the mandibular angle in the adult population of Iran. Methods: This cross-sectional study enrolled 149 patients (73 men and 76 women) referred to the 600 Army Dental Center in 2016. Graphics were obtained from cephalogram and panorex using a Soredex digital device and Pack software to measure mandibular angles. Results: The mean mandibular angle was 122.19 ± 3.89 in men and 124.72 ± 3.24 in women, with a significant difference based on the independent t test (P < 0.05). Conclusions: It seems that the mandibular angle is higher in women than in men.
Experimental verification of torsional response control of asymmetric buildings using MR dampers

This paper proposes a semiactive control system to reduce the coupled lateral and torsional motions in asymmetric buildings subjected to horizontal seismic excitations. Magnetorheological (MR) dampers are applied as semiactive control devices and the control input determination is based on a clipped‐optimal control algorithm which uses absolute acceleration feedback. The performance of this method is studied experimentally using a 2‐story building model with an asymmetric stiffness distribution. An automated system identification methodology is implemented to develop a control‐oriented model which has the natural frequencies observed in the experimental system. The parameters for the MR damper model are identified using experimental data to develop an integrated model of the structure and MR dampers. To demonstrate the performance of this control system on the experimental structure, a shake table is used to reproduce an El Centro 1940 N–S earthquake as well as a random white noise excitation. The responses for the proposed control system are compared to those of passive control cases in which a constant voltage is applied to the MR damper. Copyright © 2003 John Wiley & Sons, Ltd.
Are Simultaneously Decided Referenda Substitutable? Evidence from Municipal Land Use Ballot Measures

The results of ballot referenda have often been used to infer the preferences of voters for various types of policy. However, voters may be influenced by the appearance of competing ballot referenda. We propose a simple theoretical framework for considering the substitutability or complementarity of various land use policies and apply this framework to a novel dataset of 603 land-related municipal ballot measures in California. We find that the appearance of a competing anti-growth measure decreases support for other anti-growth measures, while the appearance of pro-growth measures do not affect the likelihood of passage for anti-growth or pro-growth measures.
Social inequality in alternative sanctions: A register data study on all adolescent drug offenders in Norway 2005–2015

The penal repertoire for young offenders in Europe encompasses an increasing variety of alternative sanctions. Research indicates that the availability and implementation of these sanctions vary within jurisdictions, raising issues of unequal treatment for equal offences. Among possible factors associated with intra-jurisdictional disparities in alternative sentencing outcomes is the socioeconomic status of young offenders. This study investigates the social profile of diverted youth, thereby addressing social inequalities in alternative sanctioning. Register data on all 15- to 17-year olds charged with minor drug offences in Norway between 2005 and 2015 (N = 3209) were compared to a randomly drawn sample of non-offenders (N = 69,201). Offenders who were diverted from a fine to a conditional waiver of prosecution, either with or without rehabilitative measures, were classified with an alternative sanction. Socioeconomic status was measured by an indicator combining register data on household income and parental education. Probit regressions with sample selection were used to identify social gradients in alternative sanctioning. By extensive register linkages, we were able to control for a range of well-known confounders such as gender, immigrant status, family composition, parental crime, and geographical centrality. We found that the probability of receiving a conditional waiver of prosecution was around 5% points higher for youth from a medium-high socioeconomic status background and 8% points higher for youth from a high socioeconomic status background compared with their low socioeconomic status counterparts. The positive social gradient pertained to sanctioning with rehabilitative elements and not to minimal interventions. Social inequality in desistance-oriented sanctions, which may consolidate pre-existing inequalities in criminal charges, is likely influenced by the resources parents have at their disposal to get involved in their children’s legal processes.
Growth and Yield of Aerobic Rice as Influenced by Integrated Weed Management Practices

A field experiment was conducted during kharif 2009 at Zonal Agricultural Research Station, V. C. Farm, Mandya, Karnataka. The experiment consisted of 12 treatments laid out in randomized complete block design with three replications consisting of four pre-emergence herbicides integrated with one intercultivation at 40 days after sowing, hand weeding twice at 20 and 40 days after sowing, intercultivation thrice at 20, 40 and 60 days after sowing compared with weed free and unweeded check. The predominant weed flora observed in the experimental field were Echinochloa colonum, Digitaria marginata, Ageratum conyzoides, Spilanthus acmella, Commelina benghalensis, Celosia argentia, Cyperus iria and Cyperus rotundus. The results revealed that pre-emergence application of bensulfuron methyl+pretilachlor (6.6 GR) @ 0.06+0.60 kg/ha+one intercultivation at 40 days after sowing recorded significantly higher grain and straw yield (4425 and 5020 kg/ha, respectively), lower weed population and their dry weight (17.0 g and 2.32 g 0.25/m2, respectively). Further the net returns and B: C ratio were also high with the pre-emergence application of bensulfuron methyl + pretilachlor (6.6 GR) @ 0.06 + 0.60 kg/ha+one intercultivation at 40 days after sowing.
ASSESSMENT OF HETEROSIS IN DURUM WHEAT F1 HYBRIDS UNDER FIELD CONDITIONS

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Use of a Managed Flow Pulse as Food Web Support for Estuarine Habitat

While freshwater inflow has been a major focus of resource management in estuaries, including the upper San Francisco Estuary, there is a growing interest in using focused flow actions to maximize benefits for specific regions, habitats, and species. As a test of this concept, in summer 2016, we used a managed flow pulse to target an ecologically important region: a freshwater tidal slough complex (Cache Slough Complex–CSC). Our goal was to improve estuarine habitat by increasing net flows through CSC to enhance downstream transport of lower trophic-level resources, an important driver for fishes such as the endangered Delta Smelt Hypomesus transpacificus. We used regional water infrastructure to direct 18.5 million m³ of Sacramento River flow into its adjacent Yolo Bypass floodplain, where the pulse continued through CSC. Simulations using a 3-D hydrodynamic model (UnTRIM) indicated that the managed flow pulse had a large effect on the net flow of water through Yolo Bypass, and between CSC and further downstream. Multiple water quality constituents (specific conductivity, dissolved oxygen, nutrients [NO₃ + NO₂, NH₄, PO₄]) varied across the study region, and showed a strong response to the flow pulse. In addition, the lower Sacramento River had increased phytoplankton biomass and improved food quality indices (estimated from long-chain essential fatty acids) after the flow pulse. The managed flow pulse resulted in increased densities of zooplankton (copepods, cladocerans) demonstrating potential advection from upper floodplain channels into the target CSC and Sacramento River regions. This study was conducted during a single year, which may have had unique characteristics; however, we believe that our study is an instructive example of how a relatively modest change in net flows can generate measurable changes in ecologically relevant metrics, and how an adaptive management action can help inform resource management.
CONTROLE ALTERNATIVO DE NEMATOIDE DAS GALHAS (Meloidogyne enterolobii) COM CRAVO DE DEFUNTO (Tagetes patula L.), EM SOLO

A correta identificacao de fitopatogenos e de grande importância para se formar um acervo de dados que serao uteis para diagnose e controle. Com o aumento do plantio de goiaba no Ceara, percebe-se a presenca de Meloidogyne associado a cultura e causando grandes prejuizos, contudo, o controle para tal molestia ainda nao existe. Em funcao disso, objetivou-se nesse ensaio avaliar o controle alternativo de M. enterolobii com a incorporacao de fitomassa de cravo de defunto. O trabalho foi realizado de janeiro a maio de 2009, em Barbalha-CE. A avaliacao do efeito da incorporacao da fitomassa de cravo de defunto ao solo foi realizada em funcao da idade de transplantio (12, 18, 24 e 30 dias). Avaliou-se aos 35 dias apos o transplantio do tomate, sendo mensuradas: numero de galhas, peso fresco da parte aerea e do sistema radicular. Verificou-se que a incorporacao da fitomassa de cravo de defunto ao solo apresentou-se eficiente na reducao da populacao do nematoide. Conclui-se que a incorporacao de fitomassa e eficiente na reducao populacional de M. enterolobii e que 30 dias apos o transplantio e a melhor epoca para se cortar e incorpora-la ao solo.
On study of a patch antenna with shorting posts

The finite‐element method (FEM) is applied to analyze a thin substrate antenna with shorting posts. The resonant frequency of this kind of antenna is studied and compared with other numerical result and experimental data. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 41: 47–49, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20042
Effect of shadowing on the performance of space-time trellis coded systems

We analyze the performance of space-time trellis codes over shadowed Rician fading channels. The shadowed Rician channel is a generalization of the Rician model, where the line-of-sight path is subjected to a lognormal transformation due to foliage attenuation, also referred to as shadowing. We derive an exact expression on the pairwise error probability (PEP) for space-time trellis coded systems over this channel through the moment generating function method. The asymptotic analysis of PEP shows that the design criteria of space-time trellis codes proposed for Rayleigh fading still hold when used over shadowed Rician channels. We also present simulation results for bit error rate performance under different degrees of shadowing.
A review of recent studies on landslide hazard in Latin America

ABSTRACT Over the last few decades, the impact of landslides has increased in Latin America. However, there is a deficiency in the region of diagnostic studies on landslide hazards. This review analyzes the state of the art of studies on landslide hazard occurred in Latin America. A search for articles published from 2000 to 2019 was carried out in Scopus, WoS, SciELO, REDIB, and Redalyc. The search yielded 1,365 publications, which were purged obtaining 283 articles, analyzed through a database organized in four categories: general information, study area, research objectives, and methodology. We identified an increase in the number of publications from the year 2011. Seventy-five percent of the 20 countries in the region published papers on landslides that had occurred in these countries, mainly research focus on susceptibility and characterization, and a reduced number, on hazardousness, inventories, trigger factors and conditioning factors. The results suggest the opportunity to incorporate novel methods, tools, techniques, and inputs into research of landslides in Latin America. This review constitutes an analytical and critical contribution to the study of landslide hazards in the region and indicates the studies that are urgent to enforce its integral management in the region and in other intertropical zones.
Chloroquine potentially modulated innate immune response to Vibrio parahaemolyticus in RAW 264.7 macrophages

ABSTRACT Vibrio parahaemolyticus, as a vibriosis, causes huge losses to the aquaculture industry, food poisoning in humans and activates macrophages to induce pro-inflammatory cytokines. Chloroquine (CQ), as an anti-inflammatory property, this study aimed to investigate the effect of CQ on inflammatory response to V. parahaemolyticus in RAW 264.7 macrophages. The result showed that V. parahaemolyticus induced the production of T-cell co-stimulatory molecules (CD80, CD86, CD40 and MHC II), and increased the production and mRNA expression of pro-inflammatory, anti-inflammatory cytokines and type I interferons (IFNs). Meanwhile, the stimulated macrophages elevated cellular stress-released reactive oxygen species and nitric oxide synthase to trigger an antimicrobial response, and effectively reduced the accumulation of acetylated low-density lipoprotein and neutral lipids. Finally, we found that chloroquine (CQ) was involved in inhibiting inflammatory cytokine expression in response to V. parahaemolyticus. These results suggested that CQ potentially attenuated the inflammatory cytokine expression in Gram-negative bacterium-activated macrophages.