Class Fraction Research Articles

On the cyclicity of the rational points group of abelian varieties over finite fields

We propose a simple criterion to know if an abelian variety A defined over a finite field Fq is cyclic, i.e., it has a cyclic group of rational points; this criterion is based on the endomorphism ring EndFq(A). We also provide a criterion to know if an isogeny class is cyclic, i.e., all its varieties are cyclic; this criterion is based on the characteristic polynomial of the isogeny class. We find some asymptotic lower bounds on the fraction of cyclic Fq-isogeny classes among certain families of them, when q tends to infinity. Some of these bounds require an additional hypothesis. In the case of surfaces, we prove that this hypothesis is achieved and, over all Fq-isogeny classes with endomorphism algebra being a field and where q is an even power of a prime, we prove that the one with maximal number of rational points is cyclic and ordinary.

Detailed urban surface characterization using spectra from enhanced spatial resolution Sentinel-2 imagery and a hierarchical multiple endmember spectral mixture analysis approach

Detailed mapping of urban surfaces is one of the most challenging tasks in remote sensing due to the three-dimensional structure of cities, spatial diversity, and material spectral variability. Satellite urban applications demand better spatial, spectral, and temporal resolution, although there are strict technical constraints among them. Therefore, the development of sophisticated methods that exploit both high spectral and spatial data sources becomes necessary. A hierarchical multiple endmember spectral mixture analysis (MESMA) approach is developed and applied on Sentinel-2 imagery for the detailed quantification of the urban land cover, taking advantage of Worldview-2 high spatial resolution. The case study is the urban and peri-urban area of Heraklion, Greece. The area to point regression kriging (ATPRK) method is applied to downscale Sentinel-2 bands from 10 and 20 m to 2 m (WorldView-2 spatial resolution) and create a spectral library (SL) of urban materials, which contain 180 separate spectra. The urban SL is then used in the developed hierarchical MESMA approach to estimate the abundances of 11 urban land cover classes based on the original Sentinel-2 image. The estimated land cover fractions validate against a very high-resolution (1 m) land cover map of the area. It is proved that the complexity of the urban land cover can be efficiently investigated by the proposed methodology. Error analysis shows good accuracy of the results in all estimated class fractions. Moreover, the good validation results lead to the conclusion that ATPRK fusion algorithm between Sentinel-2 and WorldView-2 bands produced reliable urban material spectra, capable for advanced spectral analysis on Sentinel-2 imagery. The developed methodology is easily transferable to other cities since it is based exclusively on earth observation data and is suitable for multiple urban applications related to urban climate, urban sprawl, and urban regeneration.

Sacubitril/Valsartan in Daily Clinical Practice: Data From a Prospective Registry.

Sacubitril/valsartan (SV) is a new therapy in heart failure with reduced ejection fraction. Our aim was to determine the efficacy and safety of this drug daily clinical practice. We performed a multicenter registry in 10 hospitals. All patients who started SV from October 2016 to March 2017 on an outpatient basis were included. A total of 427 patients started treatment with SV. Mean follow-up was 7.0 ± 0.1 months. Forty-nine patients (11.5%) discontinued SV, and 12 (2.8%) died. SV discontinuation was associated with higher cardiovascular (hazard ratio 13.22, 95% confidence interval, 6.71-15.73, P < 0.001) and all-cause mortality (hazard ratio 13.51, 95% confidence interval 3.22-56.13, P < 0.001). Symptomatic hypotension occurred in 71 patients (16.6%). Baseline N-terminal pro-B-type natriuretic peptide levels, functional class, and left ventricular ejection fraction improved at the end of follow-up in patients who continued with SV (all P values ≤0.001). This improvement was not significant in patients with SV discontinuation. SV has a good tolerability in patients from daily clinical practice. SV withdrawal in patients with heart failure and reduced ejection fraction was independently associated with increased all-cause mortality. Patients who continued with SV presented an improvement in functional class left ventricular ejection fraction and N-terminal pro-B-type natriuretic peptide levels.

Preliminary experience with the multisensor HeartLogic algorithm for heart failure monitoring: a retrospective case series report.

AimsIn the Multisensor Chronic Evaluation in Ambulatory Heart Failure Patients study, a novel algorithm for heart failure (HF) monitoring was implemented. The HeartLogic (Boston Scientific) index combines data from multiple implantable cardioverter defibrillator (ICD)‐based sensors and has proved to be a sensitive and timely predictor of impending HF decompensation. The remote monitoring of HF patients by means of HeartLogic has never been described in clinical practice. We report post‐implantation data collected from sensors, the combined index, and their association with clinical events during follow‐up in a group of patients who received a HeartLogic‐enabled device in clinical practice.Methods and resultsPatients with ICD and cardiac resynchronization therapy ICD were remotely monitored. In December 2017, the HeartLogic feature was activated on the remote monitoring platform, and multiple ICD‐based sensor data collected since device implantation were made available: HeartLogic index, heart rate, heart sounds, thoracic impedance, respiration, and activity. Their association with clinical events was retrospectively analysed. Data from 58 patients were analysed. During a mean follow‐up of 5 ± 3 months, the HeartLogic index crossed the threshold value (set by default to 16) 24 times (over 24 person‐years, 0.99 alerts/patient‐year) in 16 patients. HeartLogic alerts preceded five HF hospitalizations and five unplanned in‐office visits for HF. Symptoms or signs of HF were also reported at the time of five scheduled visits. The median early warning time and the time spent in alert were longer in the case of hospitalizations than in the case of minor events of clinical deterioration of HF. HeartLogic contributing sensors detected changes in heart sound amplitude (increased third sound and decreased first sound) in all cases of alerts. Patients with HeartLogic alerts during the observation period had higher New York Heart Association class (P = 0.025) and lower ejection fraction (P = 0.016) at the time of activation.ConclusionsOur retrospective analysis indicates that the HeartLogic algorithm might be useful to detect gradual worsening of HF and to stratify risk of HF decompensation.

Prevalence and outcome of diuretic resistance in heart failure.

Diuretic resistance (DR) is common in patients with decompensated heart failure (HF), and is associated with adverse outcomes. To determine the prevalence of DR and its impact on survival among patients with decompensated HF, we prospectively evaluated the prevalence and influence on prognosis of DR (defined as persistent congestion despite ≥ 80mg of furosemide per day) in a cohort of elderly patients from the Spanish HF registry (RICA) admitted for an acute decompensation of HF. Patients with new-onset HF were excluded. From the global cohort of 2067 patients, 435 (21%; 95% CI 19.3%-22.7%) patients met criteria for DR. Patients with DR had more comorbidities (hypercholesterolemia, diabetes mellitus, valvular disease, chronic kidney disease, and cancer) and a worse functional status compared to patients without DR. In addition, patients with DR had a higher proportion of ischemic etiology, more advanced functional class and lower left ventricular ejection fraction values. After 1year of follow-up, all-cause mortality was higher in patients with DR with an adjusted hazard ratio of 1.37 (95% CI 1.06-1.79; p = 0.018). The prevalence of DR in a cohort of elderly patients admitted for acute HF decompensation is 21%. DR is an independent predictor of 1-year mortality.

Effects of tillage intensity on pore system and physical quality of silt-textured soils detected by multiple methods

Understanding the effects of agricultural management practices on soil functionality is an ongoing challenge in environmental science and agricultural practice. In the present study we quantified the effects of changes in tillage intensity on soil physical quality and pore size distribution after 6, 10 and 23 years. At three long-term tillage experimental sites in central Europe we analysed soils under four different soil management systems: conventional mouldboard tillage; chiselling + rotary harrow; rotary harrow; and no till. These treatments differed in mechanical intensity and depth. Pore size distributions were calculated from soil water retention curves based on high-resolution measurements. Subsequently, fractions of functional pore size classes and indicators of soil physical quality were determined and compared between the treatments. In addition, we evaluated the performance of two calculation approaches for pore size distribution: (1) fitting of a smoothing cubic spline; and (2) a bimodal van Genuchten function. The parametric function yielded a higher proportion of storage pores by approximately 3–5%. The combination of multiple measurement and evaluation methods enabled detailed comparison of soil physical characteristics between different tillage treatments. No-till soils showed a distinct lack of transmissive pores and higher bulk density, but similar plant-available water capacity, compared with the other treatments. Under all soil management systems, aeration deficits were observed, emphasising the high vulnerability for compaction of silt-dominated arable soils with a low organic matter content. Hence, the design of agricultural soil management strategies on such soils needs to consider the risks of compaction as thoroughly as erosion or chemical degradation.

Left Atrial Volume during Stress Is Associated with Increased Risk of Arrhythmias in Patients with Hypertrophic Cardiomyopathy.

Introduction:In patients affected by hypertrophic cardiomyopathy (HCM), left atrial volume index (LAVi) is associated with an increased risk of tachyarrhythmias and major clinical events. To date, the clinical meaning of LAVi measured during exercise (stress LAVi [sLAVi]) has not yet been investigated in HCM. This study sought to evaluate the correlation between LAVi/sLAVi and clinical outcome (risk of arrhythmias and heart failure [HF]) in patients with HCM.Methods and Results:We enrolled a total of 51 consecutive patients with HCM (39 men; mean age: 39.41 ± 17.9 years) who underwent standard and stress echocardiography, following a common protocol. During follow-up (median follow-up was 1.82 years), the following composite endpoints were collected: ARRHYT endpoint (atrial fibrillation, paroxysmal supraventricular tachycardia, nonsustained ventricular tachycardia (VT), sustained VT, ventricular fibrillation, syncope of likely cardiogenic nature, and sudden cardiac death) and HF endpoint (worsening of functional class and left ventricular ejection fraction, hospitalization, and death for end-stage HF). Eight patients were lost at follow-up. ARRHYT endpoint occurred in 13 (30.2%) patients (8, 18.6%, supraventricular and 10, 23.2%, ventricular arrhythmias), whereas HF endpoint occurred in 5 (11.6%) patients. sLAVi (mean value of 31.16 ± 10.15 mL/m2) performed better than rLAVi as a predictor of ARRHYT endpoint (Akaike Information Criterion: 48.37 vs. 50.37, if dichotomized according to the median values). A sLAVi value of 30 mL/m2 showed a predictive accuracy of 72.1% (C-statistics of 0.7346), with a high negative predictive value (87.5%).Conclusion:These findings encourage future studies on sLAVi, as a potential predictor of arrhythmias and adverse outcome in patients with HCM.

Partial characterization of bean and maize root peroxidases and their ability to crosslink potato protein

Two fractions of Class III peroxidases (POX; EC 1.11.1.7), soluble and ionically bound to the cell wall, were partially purified from bean and maize roots and characterized. According to the measured Km, both the soluble and ionically bound to the cell wall fractions of POX had high affinity for H2O2 and the high specificity for caffeic acid. Approximate molecular weights of POX in their tertiary (native) structure were determined by modified sodium dodecyl sulfate (SDS) polyacrylamide gel electrophoresis (PAGE). Proteomic analysis resolved the identity and pI of different enzyme bands. The ability of maize and bean soluble peroxidase to crosslink native potato proteins was evaluated. The results obtained by SDSPAGE showed that both POX enzymes were capable of crosslinking potato protein, in particular patatin, a globular protein, with and without the presence of H2O2. To investigate the possible role of phenolic compounds in facilitating crosslinking, commercial horseradish peroxidase (HRP) with/without the addition of caffeic acid was used to crosslink potato protein. Information provided here could be useful for the purification of POX from maize and bean roots and for examination of protein-protein interactions.

Activation of the hypothalamic paraventricular nucleus by acute intermittent hypoxia: Implications for sympathetic long-term facilitation neuroplasticity

Exposure to acute intermittent hypoxia (AIH) induces a progressive increase of sympathetic nerve activity (SNA) that reflects a form of neuroplasticity known as sympathetic long-term facilitation (sLTF). Our recent findings indicate that activity of neurons in the hypothalamic paraventricular nucleus (PVN) contributes to AIH-induced sLTF, but neither the intra-PVN distribution nor the neurochemical identity of AIH responsive neurons has been determined. Here, awake rats were exposed to 10 cycles of AIH and c-Fos immunohistochemistry was performed to identify transcriptionally activated neurons in rostral, middle and caudal planes of the PVN. Effects of graded intensities of AIH were investigated in separate groups of rats (n = 6/group) in which inspired oxygen (O2) was reduced every 6 min from 21% to nadirs of 10%, 8% or 6%. All intensities of AIH failed to increase c-Fos counts in the caudally located lateral parvocellular region of the PVN. c-Fos counts increased in the dorsal parvocellular and central magnocellular regions, but significance was achieved only with AIH to 6% O2 (P < 0.002). By contrast, graded intensities of AIH induced graded c-Fos activation in the stress-related medial parvocellular (MP) region. Focusing on AIH exposure to 8% O2, experiments next investigated the stress-regulatory neuropeptide content of AIH-activated MP neurons. Tissue sections immunostained for corticotropin-releasing hormone (CRH) or arginine vasopressin (AVP) revealed a significantly greater number of neurons stained for CRH than AVP (P < 0.0001), though AIH induced expression of c-Fos in a similar fraction (~14%) of each neurochemical class. Amongst AIH-activated MP neurons, ~30% stained for CRH while only ~2% stained for AVP. Most AIH-activated CRH neurons (~82%) were distributed in the rostral one-half of the PVN. Results indicate that AIH recruits CRH, but not AVP, neurons in rostral to middle levels of the MP region of PVN, and raise the possibility that these CRH neurons may be a substrate for AIH-induced sLTF neuroplasticity.

INVESTIGATION AND OPTIMIZATION OF A CLOSED CIRCUIT CRUSHING OF COPPERMOLYBDENUM ORE

To control the processes of ore treatment proposed adapted to the conditions of a closed cycle crushing-screening criterion "output productive class -2 + 10 mm", reflecting the effectiveness of all processes. The dependence of the outputs of the individual classes of ore and the proposed optimization criterion parameters of the grinding process shows their relationship with the energy intensity of the process. It is shown that the increase in the load on the screen causes a decrease in the screening efficiency and an increase in the mass fraction of class +2 mm in the circulating ore. Excessive increase in the width of the discharge gap of the crusher causes an increase in the output of the circulating product and an increase in energy consumption. Reducing the discharge gap of less than 7.5 mm leads to an increase in the output of the class - 2 mm. An improved system and algorithm for optical analysis of ore size was proposed and tested. The sensors for controlling the granulometric composition of ore are located above the conveyors for the transportation of over-and under-mortar products of the screening operation. The optical analysis mode provides for the sequential switching on / off of feeding conveyors and crushers, thereby ensuring the flow of the crushed product into the measurement zone from one crusher. The total duration of the analysis of ore from 6 crushers is 12 minutes, which does not affect the final performance of the device of crushing. The application of the developed algorithm can significantly improve the accuracy of the analysis of the size of crushed ore and reduce the power consumption during the processing of ore.

PENGEMBANGAN MEDIA PEMBELAJARAN PERMAINAN ULAR TANGGA MATERI OPERASI HITUNG PECAHAN KELAS V SEKOLAH DASAR NEGERI 24 CAKRANEGARA TAHUN PELAJARAN 2017/2018

This study aims to develop a valid and effective teaching material on grade V Mathematics subjects in elementary school and to find out the results of the development of snake ladder game media in fractional counting operations in class V students. namely the Define, Design, and Develop stages adopted from the FourD Thiagarajan model. The formulation of the problem in this study is how to develop a valid and effective snake ladder game learning media on math subjects operating material to calculate the V class fractions of elementary school in academic year 2017/2018. The results showed that the quality of the snake ladder game media in mathematics learning for elementary school students in grade V was included in the good category, with an average score of material aspects 68.2, from the media aspect 72.25, from a scale of 1-5. The results of the distribution of motivation questionnaires conducted in the field trials with a total of 17 students amounted to 98.42%. This means that the game of the snake game shows that the use of this snake game media has a good impact on improving the learning motivation of fifth grade students at SDN 24 Cakranegara.

What is the best imaging technique to explore right ventricular function at the time of multimodality cardiovascular imaging?

Right ventricular (RV) function is a powerful independent predictor of adverse heart failure outcomes. Several RV imaging parameters have been proposed to detect patients at risk new-onset acute heart failure. The objective of our study was to compare the predictive value of main RV systolic parameters for outcome. Seventy nine patients who underwent comprehensive cardiovascular imaging modalities including transthoracic echocardiography, cardiac magnetic resonance imaging (CMR) and tomographic equilibrium radio nuclide ventriculography (ERV) for the assessment of RV function were retrospectively included. The composite was defined by the occurrence of death, heart transplantation, implantation of a left ventricular assist device or new-onset acute heart failure. Mean NYHA class and left ventricular ejection fraction were 1.7 ± 0.9 and 46 ± 17%, respectively. During a mean follow-up of 13 ± 9 months, 13 (20%) patients reached the composite primary end-point. The areas under the receiver operator characteristic curves for the prediction of MACE were 0.922 ( P < 0.0001), 0.913 ( P < 0.0001), 0.906 ( P < 0.0001), 0.849 ( P = 0.002), 0.837 ( P = 0.003), 0,799 ( P = 0.009), 0.792 ( P = 0.011), 0.753 ( P = 0.026), 0.720 ( P = 0.053) and 0.608 (0.346) for integral systolic S’ wave tricuspid annular velocity, RV free wall longitudinal strain (RVFWLS), RV fractional area change, tricuspid annular plane systolic excursion, RV ejection fraction (RVEF) by CMR using the 4-chamber slices, peak systolic S’ wave tricuspid annular velocity, RVEF by CMR using short-axis slices, RVEF by ERV, RV myocardial performance index, and RV myocardial acceleration during isovolumic contraction, respectively. Among comprehensive cardiovascular imaging modalities allowing the assessment of RV function, echocardiographic parameters, and particularly integral systolic S’ wave tricuspid annular velocity and RVFWLS, have the best prognostic performance and the best rater reliabilities.

Urban form and composition of street canyons: A human-centric big data and deep learning approach

Various research applications require detailed metrics to describe the form and composition of cities at fine scales, but the parameter computation remains a challenge due to limited data availability, quality, and processing capabilities. We developed an innovative big data approach to derive street-level morphology and urban feature composition as experienced by a pedestrian from Google Street View (GSV) imagery. We employed a scalable deep learning framework to segment 90-degree field of view GSV image cubes into six classes: sky, trees, buildings, impervious surfaces, pervious surfaces, and non-permanent objects. We increased the classification accuracy by differentiating between three view directions (lateral, down, and up) and by introducing a void class as training label. To model the urban environment as perceived by a pedestrian in a street canyon, we projected the segmented image cubes onto spheres and evaluated the fraction of each surface class on the sphere. To demonstrate the application of our approach, we analyzed the urban form and composition of Philadelphia County and three Philadelphia neighborhoods (suburb, center city, lower income neighborhood) using stacked area graphs. Our method is fully scalable to other geographic locations and constitutes an important step towards building a global morphological database to describe the form and composition of cities from a human-centric perspective.

A Theoretical Packing Density Model (TPDM) for ordered and disordered packings

In previous papers, the 4-parameter Compressible Packing Model (CPM) was theoretically developed and validated for the packing density of binary mixtures of spheres and crushed aggregate particles. The 4-parameter CPM is now called the Theoretical Packing Density Model (TPDM). The TPDM is a self-consistent packing density model which is now validated for both disordered and ordered packings. Thanks to the compaction index K which is representative of the packing process efficiency and thanks to the critical cavity size ratio from which the loosening effect appears, the TPDM is successfully applied to densest binary crystalline structures (K = 100) and to disordered ternary mixtures of spherical, round aggregate and crushed aggregate particles (from K = 4.7 to K = 15). The critical cavity size ratio can be selected in the range between 0 for irregular particles with strong surface roughness and 0.2 for frictionless spherical particles. The TPDM predictions are excellent for the peak packing density obtained for each of the densest binary crystalline structures identified. The TPDM also proves its efficiency for disordered ternary mixtures from the analysis of 408 results published in the literature when compared with the PAL (Prior, Almeida, Loureiro) model and with the 3-parameter Particle Packing Model (3PPM, Kwan et al.). The question of optimization of ternary mixtures is finally addressed. A simplified model is proposed for the purpose of building the densest ternary mixture. The analytical expressions for the highest packing density and for the corresponding volume fractions of each granular class are established. Thanks to its theoretical wall effect and loosening effect functions, the TPDM appears to be a useful tool for optimizing the granular skeleton in all circumstances: whatever its packing process (simple pouring or highly sophisticated packing process) and whatever the material (crushed aggregate particles with strong surface roughness or frictionless spherical particles).

Diagnostic and Prognostic Role of Cardiac Magnetic Resonance Before Implantable Cardioverter Defibrillator

The use of cardiac magnetic resonance (cMR) to assess remodeling and tissue characterization in primitive and secondary cardiomyopathies has progressively increased, and it carries important prognostic informations. The aim of this study was to assess the overall clinical value of cMR before implantable cardioverter defibrillator (ICD). All patients referred to our center for an ICD implantation and submitted to cMR (n = 134) were analyzed. All the cMR diagnostic findings and following clinical events were reviewed to assess clinical relevance in patients care. The use of cMR before ICD implantation has progressively increased during the decade studied (13% to 53%, p <0.001). Subjects who underwent cMR were younger, more often female, with lower NYHA class and higher ejection fraction (p <0.05 for all). Unexpected diagnostic findings were observed in 34 patients (25%), resulting in an immediate therapeutic strategy modification in 13%. A pattern of fibrosis leading to a change in the disease's etiology and thrombus detection were the most frequent cMR findings, followed by anatomical incidental findings. Any grade of fibrosis carried a higher annual incidence of combined death or ventricular arrhythmias (9.92% vs 1.83%, p = 0.02). Annual event rate was related to the extent of scarring. In conclusion, we observed a progressively increase of cMR utilization before ICD implantation during the last decade. This practice has yielded a significant increase of new diagnostic findings, carrying unique prognostic information linked to tissue characterization.

Diversidade de gênero e Sistema Único de Saúde: uma problematização sobre o processo transexualizador

Neste artigo, a partir de um estudo exploratório documental e bibliográfico, problematizamos o processo transexualizador, do Sistema Único de Saúde (SUS), frente aos desafios da garantia de direitos à identidade de gênero e de cidadania. Acreditamos que os dilemas para acesso e acompanhamento ao processo transexualizador são os mesmos enfrentados por toda a classe trabalhadora referente ao papel do Estado na garantia às necessidades de saúde na média e na alta complexidade, numa conjuntura de cortes nos gastos estatais e na mercantilização dos serviços sociais. Neste sentido, apontamos as desigualdades no acesso, as dificuldades na liberação do processo e críticas quanto ao diagnóstico e no seu acompanhamento pós-processo. Por fim, o resultado instiga-nos a problematizar o acesso ao SUS, condicionado às necessidades sociais dessa fração da classe trabalhadora em contraposição a patologização da transexualidade, com o entendimento do modelo biomédico e mercantil.

The Sources and Transport Patterns of Modern Sediments in Hangzhou Bay: Evidence from Clay Minerals

Clay mineral compositions of 199 offshore surface sediment samples collected from the Hangzhou Bay have been analyzed. The clay minerals in the sediments from the Hangzhou Bay are dominated by illite (58.7%, on average), followed by chlorite (20.3%), kaolinite (16.9%) and smectite (4.1%). Two provinces were classified by Q-mode cluster analysis. Class I with relatively low amounts of illite and smectite is widely distributed in the Hangzhou Bay, especially concentrated in the top and mouth of the bay, and the northern and southern nearshore areas. Class II with comparatively high amounts of illite and smectite is mainly concentrated in the central part of the bay with the water depth of 8–10 m. By comparing clay mineral compositions with the neighbouring regions, we can find that the sediments in the Hangzhou Bay are mainly influenced by the resuspension and repeated deposition of particles from the Yangtze River due to the strong dynamic environment. In particular, the clay fraction of Class I is mainly supplied by the Yangtze River, while the sediments of Class II are mixture of the clay minerals carried by the Yangtze River and Qiantang River. In general, the distributions of clay minerals in the northern bay are affected by Yangtze River runoff, coastal current and flood tide together, and in the southern they are mainly affected by the Qiantang River runoff and ebb tide.

KEEFEKTIFAN MODEL STUDENT TEAM ACHIEVEMENT DIVISION (STAD) DAN E-LEARNING PADA MATERI OPERASI PENJUMLAHAN DAN PENGURANGAN PECAHAN DI SEKOLAH DASAR

The low learning outcomes of Addition and Reduction of Fractions in class IV are partly due to: (1) a tedious learning process, (2) lack of use of ICT as a source and media of learning. To overcome this problem the research team developed student-centered learning through e-learning learning in the Student Team Achievement Division (STAD) model. This study is a true experiment using the Pre-Test Group Control Post Test Design. The population is Sambiroto 02 elementary school students as many as 75 students in the 2017/2018 school year. The E2 group with EAD learning using the STAD model reached the highest mean value of the three groups, amounting to 88.67, followed by the E1 group with STAD learning at 74.54 and the K group with expository learning at 63.10. Regression analysis showed a positive relationship between motivation and activity with learning outcomes in groups E1 and E2 so it can be concluded that the higher the student's motivation and activity score the higher the student's learning achievement in addition and subtraction operations in elementary schools.

Preventive Use of Ascorbic Acid For Atrial Fibrillation After Coronary Artery Bypass Graft Surgery.

Atrial fibrillation is one of the most frequent complications and a major risk of morbidity and mortality after cardiac surgery. Antioxidants such as vitamin C are used for prevention of this arrhythmia. Different results of studies have been reported, but most of them have shown efficiency of vitamin C in prophylaxis of postoperative AF. We tried to examine this efficacy with larger sample size. Three hundred and fourteen on pump coronary artery bypass graft surgery alone. Patients were divided into two groups: The intervention group received vitamin C (N = 160) and the control group did not receive any (N = 154). Intervention group was administered two grams of vitamin C intravenously (IV) 24 hours preoperatively, 500 mg every 12 hours IV for 48 hours in ICU, and 500 mg every 12 hours PO for 48 hours in ward. Continuous monitoring in ICU and three times a day ECG was used for AF detection. The two groups were compared. The two groups were matched in terms of age, sex, LA size, ejection fraction, functional class, and TSH level. Of the patients, 244 were male. Mean age was 62 years (40-84 years) in both groups. M/F ratio was four in both groups. Functional class and ejection fraction were the same in both groups. There was no mean TSH level difference. AF occurrence in vitamin C group was 7.6 % and in control group was 7.8 %. There was no difference in ICU or hospital stay. Prophylactic use of vitamin C does not further reduce postoperative atrial fibrillation in on pump CABG patients.

How does mobility shape parental strategies – a case of the Israeli global middle class and their ‘immobile’ peers in Tel Aviv

ABSTRACTWe examined the parental strategies of global middle class (GMC) parents currently living in Israel, and compared these to their local middle class (LMC) peers. Both groups of parents were focused on securing advantages for their children through education choices and practices of cultivation. The central difference between these two groups of middle class parents was the ways in which ‘mobile-mindedness’ was conceived of, and in turn shaped the future aspirations they held for their children. A second critical finding was that this group of GMC actively fostered strong relations to belonging to their ‘home’ nation, challenging the suggestion of rootless nomads found in the literature. We argue that the GMCs in our sample think locally in each place they settle in order to secure the educational advantage, but act globally with respect to their children’s prospective futures. Meanwhile, the LMCs think globally in terms of cultivating forms of capital to secure advantages for their children, but do so with a locally-informed frame of reference for their imagined futures. These conceptual insights into the lived narratives of the GMC have implications for the ways we come to understand this emerging middle class fraction, and should shape further research in this area.