Miracle-dz/UniFAR-FTUs huggingface dataset:
Title ICT implementation and school leadership : Case studies of ICTintegration in teaching and learning

The Hong Kong Special Administrative Region (SAR) government launched a five-year ICT strategy in schools in late 1998. This paper reports the findings of the analysis on models of change in 18 schools striving to integrate the use of ICT in teaching and learning across the school curriculum. The study shows that the strategy adopted by a school in instituting such change and the resulting variation of pedagogical practices using ICT is strongly dependent on the school leaders’ vision and understanding of the role and impact of ICT in the curriculum, their goals and objectives for ICT integration, as well as the history, culture and background of the school and its general vision and mission.
4b: LESION GROWTH AFTER SRT OF BRAIN METASTASES A CLINICAL FOLLOW-UP STUDY

Background: Stereotactic radiotherapy (SRT) of brain metastases results in regression of most treated metastases, but subsequent lesion growth may occur and is caused by tumor progression or pseudo-progression. The purpose of this study is to assess the clinical course of brain metastasis patients developing lesion growth after SRT. Methods: The clinical course of all patients who received SRT for brain metastases from 2009 through 2012 and who had post-SRT lesion growth was retrospectively studied. All follow-up MRI scans were reviewed and the nature of lesion growth was classified as pseudoprogression, tumor progression or progression of uncertain cause (puc). Results: SRT was applied in 237 patients with 407 brain metastases. The median follow-up period was 40.7 months. Of the 65/237 patients (27%) with post-SRT lesion growth 57% (37/65), 14% (9/65) and 29% (19/65) had pseudo-progression, tumor progression and puc, respectively. Neurological symptoms occurred at lesion growth in 70% (26/37), 100% (9/9) and 95% (18/19) of patients with pseudo-progression, tumor progression and puc. After the first lesion growth more patients with tumor progression improved clinically (p<0.01), because more underwent surgery, more patients with pseudo-progression remained asymptomatic (p=0.04), but the number of patients that remained symptomatic was similar between the groups (p=0.47). Median survival after lesion growth of patients with pseudo-progression and tumor progression was also similar (8.6 versus 13.3 months, p=0.7). Conclusion: Patients with symptomatic pseudo-progression or local tumor progression after SRT have a similar clinical course. However, patients with asymptomatic pseudo-progression have a more favorable clinical course and may remain asymptomatic.
Adsorption of Bacterial Surface Polymers to Attachment Substrata

SUMMARY: Extracellular polysaccharide (EP) and lipopolysaccharide (LPS) were isolated from three strains of Pseudomonas fluorescens (a wild-type and two mutants) and the adsorption isotherms (relationship between amount of polymer adsorbed and bulk liquid concentration of polymer in solution) of these polymers to hydrophobic, tissue culture treated and sulphonated polystyrene surfaces were measured. The adsorption properties of the polymers were then related to the ability of the three bacterial strains to attach to the polystyrene surfaces in an attempt to elucidate the attachment mechanisms. A Langmuir adsorption isotherm equation was applied to the data, and the mathematical constants thus derived indicated if and at what concentration each surface became polymer-saturated and whether multilayer adsorption occurred. EP isolated from a crenated mutant (strain with the greatest attachment ability) adsorbed at higher concentrations than EP from wild-type and mucoid strains, and the isotherm indicated multilayer adsorption. EP from the mucoid strain (strain with little attachment ability) showed comparatively little adsorption. The isotherm of wild-type LPS was very similar to that of EP from the mucoid strain. Polymer adsorption to the three surface types was different and was generally consistent with the different degrees of bacterial attachment to the surfaces.
Evaluating Centralized and Heterarchical Control of Smart Manufacturing Systems in the Era of Industry 4.0

In light of the Fourth Industrial Revolution, the concepts of flexibility and re-configurability of manufacturing systems and the evolution of their control architectures are becoming increasingly important. The development of Cyber Physical Systems (CPS) and their flexibility and integrated capabilities have paved the way to the transition from centralized control to heterarchical (decentralized) control architectures. In this paper, a comparison between centralized and heterarchical control architectures in a virtual learning environment is presented. The control architectures of the assembly station and the materials handling system of modern manufacturing systems have been conceptualized and tested under different working conditions. The results show that centralized control is the best solution only for deterministic and predictable scenarios, which are very far from reality, whereas, in case of failures, a more flexible control is preferable.
Effect of Ferula Assafoetida on Cytoplasmic Membrane Glucose Transporter Isotype-4 of C2C12 Cell Line

Background and Aims: Ferula Assafoetida is an antioxidant plant which has long been used in Iranian traditional medicine. Recently, it has been reported to have hypoglycemic and hyperinsulinemic effects, but the molecular mechanism of this effect have not been sufficiently described. This study was a step to evaluate the molecular mechanism of Ferula assafoetida action as an antihyperglycemic agent. For this purpose, some signling pathways of the hypoglycemic effect of its extract using C2C12 mouse cell line were examined. Materials and Methods: C2C12 cells were differentiated in DMEM medium supplemented with 2% heat inactivated horse serum, and treated with 10 µg/ml extract of assafoetida in presence or absence of phosphoinositide 3-kinase (PI-3K) inhibitor. The concentration of Glucose transporter type 4 (GLUT4) in cytosol and cytoplasmic membrane were determined using SDS–polyacrylamide gel electrophoresis and western blotting analyses. Results: Data indicated that assafoetida treatment increases translocation of the GLUT4 to the cell membrane in C2C12 cell line via PI3K/Akt signaling pathway activation. Conclusion: our finding indicated that assafoetida has a potential antidiabetic effect and may be considered as antidiabetic drug.
The Effect of Exchange Rate Fluctuations on Employment in a Segmented Labor Market

How do exchange rate fluctuations affect the employment of regular and non-regular workers in a segmented labor market? We investigate the effect of exchange rate fluctuations on the employment adjustment of regular and non-regular workers using heterogeneous dependence on international trade across firms for identification. The analysis of Japanese firm-level panel data reveals that appreciation of the yen decreases the employment of exporting firms. The adjustment elasticity of non-regular employment is about five times greater than that of regular employment. Regular employment reacts more to the permanent exchange rate shocks extracted by the Beverage and Nelson decomposition, whereas non-regular employment reacts less. The estimation results suggest a significant difference in adjustment costs between regular and non-regular employment in the segmented Japanese labor market.
Fast Models of Hydrocarbon Migration Paths and Pressure Depletion Based on Complex Analysis Methods (CAM): Mini-Review and Verification

A recently developed code to model hydrocarbon migration and convective time of flight makes use of complex analysis methods (CAM) paired with Eulerian particle tracking. Because the method uses new algorithms that are uniquely developed by our research group, validation of the fast CAM solutions with independent methods is merited. Particle path solutions were compared with independent solutions methods (Eclipse). These prior and new benchmarks are briefly summarized here to further verify the results obtained with CAM codes. Pressure field solutions based on CAM are compared with independent embedded discrete fracture method (EDFM) solutions. The CAM method is particularly attractive because its grid-less nature offers fast computation times and unlimited resolution. The method is particularly well suited for solving a variety of practical field development problems. Examples are given for fast optimization of waterflood patterns. Another successful application area is the modeling of fluid withdrawal patterns in hydraulically fractured wells. Because no gridding is required, the CAM model can compute the evolution of the drained rock volume (DRV) for an unlimited (but finite) number of both hydraulic and natural fractures. Such computations of the DRV are based on the convective time of flight and show the fluid withdrawal zone in the reservoir. In contrast, pressure depletion models are based on the diffusive time of flight. In ultra-low permeability reservoirs, the pressure depletion zones do not correspond to the DRV, because the convective and diffusive displacement rates differ over an order of magnitude (diffusive time of flight being the fastest). Therefore, pressure depletion models vastly overestimate the drained volume in shale reservoirs, which is why fracture and well spacing decisions should be based on both pressure depletion and DRV models, not pressure only.
COEFICIENTE DE ENDOGAMIA DE LAS VARIEDADES SINTÉTICAS DE CRUZAS DOBLES INBREEDING COEFFICIENT OF DOUBLE-CROSS HYBRID SYNTHETIC VARIETIES

El híbrido de cruza simple es frecuentemente el tipo de variedad que maximiza el uso del potencial genético de las especies cultivadas. Sin embargo, la semilla de esta variedad es cara. Esto ha ocasionado la siembra de semilla de segunda, o de generaciones más avanzadas, lo que ha reducido significativamente el rendimiento. Se espera que la segunda, u otra generación más avanzada de una cruza doble tenga un coeficiente de endogamia menor que el de la correspondiente generación de un híbrido de cruza simple o trilineal. Además, la media genotípica de una variedad sintética (VS) tiene una relación inversa con su coeficiente de endogamia. Este trabajo se hizo para estudiar el coeficiente de endogamia (F2,CD) de una VS cuyos progenitores son n híbridos de cruza doble. Dado que, como se mostró, a esta VS tambien la generan las 4n líneas o las 2n cruzas simples involucradas en las n cruzas dobles, se derivaron fórmulas para el coeficiente de endogamia para la VS según cada tipo de progenitores. Para una VS cuyos progenitores son 4n líneas completamente endogámicas y no emparentadas, se derivó una fórmula de predicción de su media genotípica con base en F2,CD. La media genotípica (Y2) se expresó en términos de la media experimental de las líneas (Y0) y de la de sus cruzas (Y1). La ecuación de predicción fue Y2=Y1−(Y1−Y0)/(4n). Para la VS cuyos progenitores son las 2n cruzas simples o las n cruzas dobles formadas con las 4n líneas homocigóticas no emparentadas, F2,CD no fue útil para predecir la media genotípica.
Influence of home-scale freezing and storage on antioxidant properties and color quality of different garden fruits.

POIANA, M. A. , D. MOIGRADEAN and E. ALEXA, 2010. Influence of home-scale freezing and storage on antioxidant properties and color quality of different garden fruits. Bulg. J. Agric. Sci., 16: 163-171 The goal of this study is to investigate the influence of home freezing and storage at -18°C up to 10 months on the antioxidant properties and color indices of selected fruits species: strawberry (Fragaria ananassa), sweet cherry (Prunus avium L.) and sour cherry (Prunus cerasus L.). Samples were extracted and subjected to analyses for total phenolics content, total monomeric anthocyanins, vitamin C, antioxidant activity and color indices. The content of total phenolics was analyzed by Folin-Ciocalteu colorimetric method, total anthocyanins were evaluated using pH-differential method, vitamin C content by 2,6-dichlorophenolindophenol method, antioxidant activity using FRAP assay and color indices of extracts by bisulphite bleaching method. Sour cherries contain the highest amounts of polyphenols, anthocyanins and antioxidant activity among the investigated fruits species. The highest content of vitamin C was found in the fresh strawberries. After freezing, small losses were recorded for investigated bioactive compounds and color indices of fruits, because the home-freezing is a non destroyed preservation method. The storage up to 4 months did not significantly affect the bioactive compounds and color indices of investigated fruits. After a period of 10 months storage, phenolics content in frozen fruits decreased up to 28-47% of the initial value; the total anthocyanins is preserved in proportion of 80-91% of the initial value, the vitamin C content is kept at 62-76% of the initial value. By home-scale freezing and storage for 10 months, the smallest losses of antioxidant activity were recorded for sour cherries and the biggest for strawberries.
Lower Bajocian (Middle Jurassic) Ammonites of the Manflas area in Atacama Province, Northern Chile, Part 2: Giebeli Zone

Ammonite faunas from the singularis horizon (Zitteli Subzone) and sphaeroceroides horizon (Altecostata Subzone) of the Singularis Zone are described. The faunal horizons of the Singularis Zone of this area can be correlated with those of the Singularis Zone of the Paso del Espinacito section (Northern Argentina). The oldest occurrences of the ammonite Emileia buckMan in the Andean Province are described from the singularis horizon and the sphaeroceroides horizon. The rich and diverse fauna of the circum-Pacific Pseudotoites spatH includes familiar Ps. argentinus arkell and Ps. sphaeroceroides (tornquist) as well as Ps. aff. kialagvikensis WesterMann & riccardi and Ps. aff. corona (arkell), previsously unknown from the region. All “Andean” members of Pseudotoites are part of a chronocline trending to larger and broader morphs.
Soil depth and grassland origin cooperatively shape microbial community co‐occurrence and function

Many soils are deep, yet soil below 20 cm remains largely unexplored. Exotic plants can have shallower roots than native species, so their impact on microorganisms is anticipated to change with depth. Using environmental DNA and extracellular enzymatic activities, we studied fungal and bacterial community composition, diversity, function, and co-occurrence networks between native and exotic grasslands at soil depths up to 1 m. We hypothesized (1) the composition and network structure of both fungal and bacterial communities will change with increasing depth, and diversity and enzymatic function will decrease; (2) microbial enzymatic function and network connectedness will be lower in exotic grasslands; and (3) irrigation will alter microbial networks, increasing the overall connectedness. Microbial diversity decreased with depth, and community composition was distinctly different between shallow and deeper soil depths with higher numbers of unknown taxa in lower soil depths. Fungal communities differed between native and exotic plant communities. Microbial community networks were strongly shaped by biotic and abiotic factors concurrently and were the only microbial measurement affected by irrigation. In general, fungal communities were more connected in native plant communities than exotic, especially below 10 cm. Fungal networks were also more connected at lower soil depths albeit with fewer nodes. Bacterial communities demonstrated higher complexity, and greater connectedness and nodes, at lower soil depths for native plant communities. Exotic plant communities’ bacterial network connectedness altered at lower soil depths dependent on irrigation treatments. Microbial extracellular enzyme activity for carbon cycling enzymes significantly declined with soil depth, but enzymes associated with nitrogen and phosphorus cycling continued to have similar activities up to 1 m deep. Our results indicate that native and exotic grasslands have significantly different fungal communities in depths up to 1 m and that both fungal and bacterial networks are strongly shaped jointly by plant communities and abiotic factors. Soil depth is independently a major determinant of both fungal and bacterial community structures, functions, and co-occurrence networks and demonstrates further the importance of including soil itself when investigating plant–microbe interactions.
Astrophysique / Techniques astronomiques Un coronographe interférentiel achromatique coaxial

Dans le but de parvenir à l’imagerie à haute dynamique d’objets comme les exoplanètes, nous présentons ici un nouve de coronographe stellaire interférentiel, le « CIAXE ». Il est dérivé du « CIA », le Coronographe Interférentiel Achromati CIAXE se distingue de son prédécesseur par une combinaison optique originale, simplifiée, très compacte et totalemen En effet, à la différence du CIA classique qui est dérivé de l’interféromètre de Michelson, le CIAXE délivre son faisc sortie sur le même axe que le faisceau d’entrée, ce qui facilitera grandement son insertion au sein de l’instrumentation f télescope. Un tel dispositif pourrait constituer une avancée en matière d’instrumentation focale pour la recherche d’ex Pour citer cet article : J. Gay et al., C. R. Physique 6 (2005).  2005 Académie des sciences. Publié par Elsevier SAS. Tous droits réservés.
Interactive comment on “ Metabolic balance of a plankton community in a pelagic water of a northern high latitude fjord in response to increased p CO 2 ” by T

This article is a valuable contribution to the special issue reporting the results of a project that addressed the effects of pCO2 on the biogeochemistry of microbial plankton communities enclosed in mesocosms. The article is well-written and the description of methods and results is (with some omissions) largely correct. The authors are careful in presenting their main conclusion, that high pCO2 leads to low net photosynthesis, with caution. However, there are additional discrepancies and oversights which may further weaken such conclusion. The discrepancies between the present results and those reported by Engel et al. need to be resolved, as well as possible methodological
Zero-cycles on double EPW sextics

The Chow rings of hyperKähler varieties are conjectured to have a particularly rich structure. In this paper, we focus on the locally complete family of double EPW sextics and establish some properties of their Chow rings. First, we prove a Beauville–Voisin type theorem for zero-cycles on double EPW sextics; precisely, we show that the codimension-4 part of the subring of the Chow ring of a double EPW sextic generated by divisors, the Chern classes and codimension-2 cycles invariant under the anti-symplectic covering involution has rank one. Second, for double EPW sextics birational to the Hilbert square of a K3 surface, we show that the action of the anti-symplectic involution on the Chow group of zero-cycles commutes with the Fourier decomposition of Shen–Vial.
Red Supergiants, Yellow Hypergiants, and Post-RSG Evolution

How massive stars end their lives remains an open question in the field of star evolution. While the majority of stars above ≳9 M ⊙ will become red supergiants (RSGs), the terminal state of these massive stars can be heavily influenced by their mass-loss histories. Periods of enhanced circumstellar wind activity can drive stars off the RSG branch of the HR Diagram. This phase, known as post-RSG evolution, may well be tied to high mass-loss events or eruptions as seen in the Luminous Blue Variables (LBVs) and other massive stars. This article highlights some of the recent observational and modeling studies that seek to characterize this unique class of stars, the post-RSGs and link them to other massive objects on the HR Diagram such as LBVs, Yellow Hypergiants and dusty RSGs.
Temporal variability of sewage sludge heavy metal content from Greek wastewater treatment plants

Abstract The aim of this study was to evaluate the temporal variations of selected heavy metals level in anaerobic fermented and dewatered sewage sludge. Sewage sludge samples were collected in different seasons and years from three municipal wastewater treatment plants (WWTPs) located in Northern Greece, in Kavala (Kavala and Palio localities) and Drama (Drama locality) Prefectures. An investigation of the potential of sludge utilization in agriculture was performed, based on the comparison of average total heavy metal concentrations and of chromium species (hexavalent, trivalent) concentrations with the allowed values according to the Council Directive 86/278/EEC and Greek national legislation (Joint Cabinet Decision 80568/4225/91) guidelines. In this regard, all the investigated heavy metals (Cd, Cr, Cu, Ni, Pb, Zn, Hg) and chromium species Cr(VI) and Cr(III) have average concentrations (dry matter weight) well below the legislated thresholds for soil application, as following: 2.12 mg kg−1 Cd; 103.7 mg kg−1 Cr; 136.4 mg kg−1 Cu; < 0.2 mg kg−1 Hg; 29.1 mg kg−1 Ni; 62.0 mg kg−1 Pb; 1253.2 mg kg−1 Zn; 1.56 mg kg−1 Cr(VI) and 115.7 mg kg−1 Cr(III). Values of relative standard deviation (RSD) indicate a low or moderate temporal variability for domestic-related metals Zn (10.3-14.7%), Pb (27.9-44.5%) and Cu (33.5-34.2%), and high variability for the metals of mixed origin or predominantly resulted from commercial activities, such as Ni (42.4-50.7%), Cd (44.3-85.5%) and Cr (58.2-102.0%). For some elements the seasonal occurrence pattern is the same for Kavala and Palio sludge, as following: a) Cd and Cr: spring>summer>winter; b) Cu, Ni and Pb: winter>spring>summer. On average, in summer months (dry season) metal concentrations are lower than in spring and winter (wet seasons), with the exception of Zn. For Kavala and Palio the results demonstrate that the increased number of inhabitants (almost doubled) in summer time due to tourism does not influence the metal levels in sludge. Comparing the results obtained for similar spring-summer-winter sequences in 2007 and 2010/11 and for the spring season in 2007, 2008 and 2010, it can be noticed that, in general, the average heavy metal contents show an increasing tendency towards the last year. In all the measurement periods, the Palio sludge had the highest metal contents and Kavala sludge the lowest, leading to the conclusion that the WWTP operating process rather than population has a significant effect upon the heavy metal content of sludge. Cr(VI)/Cr(total) concentration ratios are higher for Kavala sludge in the majority of sampling campaigns, followed by Drama and Palio sludge. The metals which present moderate to strong positive correlation have common origin, which could be a domestic-commercial mixed source.
Estimating Carbon Fractions of Plant and Soil Organic Materials from Ozonation Chemiluminescence

The determination of C fractions in lab requires prior extraction steps that are laborious and time-consuming. Ozonation chemiluminescence can avoid the problem and has been successfully used to measure the C and N compounds in air or water, thus was proposed to determine C fractions of organic materials. Twenty-six different organic materials including soil organic matter and decomposed plant roots were examined. The changes of C fractions and molecular C structures for organic materials were studied during the ozonation process. Based on the ozonation process, three independent models were set up to predict C fractions by the luminescence characteristics. During ozonation all the three atoms of ozone were synthesized to the structure of new organic matter, thus the amount of carboxyl, carbonyl, or O-alkyl increased. C fractions can be assessed by the index of power function for luminescence intensity or luminescence time. Although some uncertainty exists in the models, this methodology provides a significant step forward from the traditional lab approach.