A novel text steganography technique to Arabic language using reverse fatah

This paper presents a new technique for information hiding in Arabic language. The technique uses text steganography to hi de the information. Considering the existence of Harakat(Fatha, Kasra and Damma) in the languages a new approach of reversing the Fatha has been developed for message hiding.The technique has been also evaluated to ensure its quality. This technique can be applied on other languages like Persian, Sindhi and other Regional language

Teachers’ perceptions of Inquiry-Based Science Education (IBSE) and the implications for gender equality in science education

This paper explores the perceived effectiveness of teacher training covering inquiry­based science learning for primary school children in England. Teachers who initially took part in teacher training between 2011 and 2013 as part of the FP7 project Pri­Sci­Net were interviewed during spring and summer term 2014; teachers were asked to reflect on their students’ reactions and engagement. Teachers’ responses were thematically analysed, and the implications are discussed within the context of longer­term implications of primary science education on girls’ attitudes and aspirations in science across their subsequent educatio

Numerical Study of Turbulent Mixed Convection Heat Transfer in a Semi-Circle Cavity Contains a Rotating Cylinder

The investigation of mixed convection inside the semi- circle cavity with a fixed cylinder and rotating has been performed numerically. The bottom wall was maintained to constant heat flux while the curved wall was subjected to ambient and an adiabatic rotating cylinder presence in center cavity . The computation fluid dynamics (CFD)modeling includes numerical solutions of the conservation equation for mass ,momentum and energy, numerical prediction by using ansys FLUENT version 15. The finite volume method were used for solving governing differential equations and the turbulence model was applied SST(K-ω) . The results were represented of streamlines, isotherm counters and distribution local Nusselt number at Rayleigh number 2.9×108 identical to heat flux q= 290w/m2 and angular velocity of cylinder ω=0 ,62.8,83.73 and 89.5rad/s clockwise and inclination angle of cavity 0°,30°and 90°.The result shows that the effect of both rotating cylinder ,inclination angle led to enhancement heat transfer. Keywords: Mixed convection, turbulence model , inclination angle , semicircle cavity. DOI: 10.7176/JNSR/9-18-02 Publication date:September 30th 201

Coherent spin dynamics of electrons and holes in CsPbBr3_3 perovskite crystals

The lead halide perovskites demonstrate huge potential for optoelectronic applications, high energy radiation detectors, light emitting devices and solar energy harvesting. Those materials exhibit strong spin-orbit coupling enabling efficient optical orientation of carrier spins in perovskite-based devices with performance controlled by a magnetic field. Perovskites are promising for spintronics due to substantial bulk and structure inversion asymmetry, however, their spin properties are not studied in detail. Here we show that elaborated time-resolved spectroscopy involving strong magnetic fields can be successfully used for perovskites. We perform a comprehensive study of high-quality CsPbBr$_3$ crystals by measuring the exciton and charge carrier $g$-factors, spin relaxation times and hyperfine interaction of carrier and nuclear spins by means of coherent spin dynamics. Owing to their "inverted" band structure, perovskites represent appealing model systems for semiconductor spintronics exploiting the valence band hole spins, while in conventional semiconductors the conduction band electrons are considered for spin functionality.Comment: 8 pages, 3 figures + supplementary informatio

3D computational fluid dynamics study of a drying process in a can making industry

YesIn the drying process of a can making industry, the drying efficiency of a thermal drying oven can be improved by adjusting the volumetric air flow rate of the blower. To maximize drying efficiency, an optimal flow rate is needed. Consequently, a three-dimensional computational fluid dynamics (CFD) is used to provide simulation according to the response of air velocity, air temperature and evaporated solvent concentration with respect to changes in volumetric air flow rate in the drying oven. An experimental study has been carried out to determine the evaporation rate of the solvent. To validate the models, the process data obtained from the CFD is compared with that obtained from actual data. In the accurate models, the simulation results demonstrate that the decrease in volumetric air flow rate provides no major discrepancy of the air velocity patterns in all dimensions and decreases the maximum temperature in the oven. Consequently, this decrease in volumetric air flow rate rapidly increases the evaporated solvent concentration in the beginning and then gradually decreases over the length of the oven. In addition, further reduction of the flow rate gives lower heat loss of the oven up to 83.67%.The authors would like to thank The Thailand Research Fund (TRF) under The Royal Golden Jubilee Ph.D. Program (PHD/0158/2550), The Institutional Research Grant (The Thailand Research Fund) (IRG 5780014) and Chulalongkorn University (Contract No. RES_57_411_21_076) for financial support to this work

Photo-damage to Keratinocytes by Quinine Photosensitization under mild Ultraviolet-B Exposure

Simultaneous and sufficient exposure to sunlight and drug cause phototoxic reactions in the skin. In the present study, the photosensitizing activity of quinine (Q) was studied. Evidences obtained by reduction of cell viability, mitochondrial damage, DNA damage, ROS generation, lysosome damage and phosphatidyl serine translocation as a marker of apoptosis indicates that exposure of quinine treated keratinocytes to UV-B radiation results in quinine photosensitization and subsequent reactions which alter normal cellular processes. Quinine absorbs strongly in UV-B region (330 nm). It reduced viability of cells significantly as observed through MTT assay. Reduction of cell viability was confirmed through accumulation of Rhodamine 123 dye which showed that quinine and UV-B treated cells accumulate less than control cells confirmed that mitochondrial membrane potential was disturbed. Increased intracellular ROS production was measured through DCF fluorescence. Early apoptosis was confirmed through phosphatidyl serine translocation in the membrane. Increased lysosome damage was observed through acridine orange accumulation in the lysosmes. Single stranded damage was confirmed through comet assay and apoptosis was confirmed through EB/AO staining.  These results show that UV-B radiation elicits phototoxic effects in keratinocytes through reactive oxygen species generation

SET domain-mediated lysine methylation in lower organisms regulates growth and transcription in hosts

Su(var)3-9, Enhancer-of-zeste, Trithorax (SET) domain–mediated lysine methylation, one of the major epigenetic marks, has been found to regulate chromatin-mediated gene transcription. Published studies have established further that methylation is not restricted to nuclear proteins but is involved in many cellular processes, including growth, differentiation, immune regulation, and cancer progression. The biological complexity of lysine methylation emerges from its capacity to cause gene activation or gene repression owing to the specific position of methylated-lysine moieties on the chromatin. Accumulating evidence suggests that despite the absence of chromatin, viruses and prokaryotes also express SET proteins, although their functional roles remain relatively less investigated. One possibility could be that SET proteins in lower organisms have more than one biological function, for example, in regulating growth or in manipulating host transcription machinery in order to establish infection. Thus, elucidating the role of an SET protein in host–pathogen interactions requires a thorough understanding of their functions. This review discusses the biological role of lysine methylation in prokaryotes and lower eukaryotes, as well as the underlying structural complexity and functional diversity of SET proteins

Assessment the association between liver cancer incidence and mortality rate with human development index in the European countries in 2012

Background: Liver Cancer (LC) is one of the most common cancers in the worldwide. This cancer is considered as the fifth most common cancer in male and the ninth most common cancer in female. However, socioeconomic factors and morbidity and mortality of cancer are linked by sophisticated and flexible pathways. We were investigated the association between incidence and mortality of LC with the Human Development Index (HDI) in European countries in 2012. Methods: This study was an ecologic study in European countries for assessment the correlation between Age-Specific Incidence Rate (ASIR) and Age-Specific Mortality Rate (ASMR) of LC with HDI and its details including: Life expectancy at birth, Mean years of schooling and Gross National Income (GNI) per capita. We used of Pearson correlation method for appraisement the association between HDI and its components with ASIR and ASMR. Data of study was analyzed by SPSS15 statistical analysis software; the significance level of the tests was considered P<0.05. Results: Generally in 2012, European countries have recorded 63,462 new cases of LC, crude rate was 8.6 and ASIR was 4.3 per 100,000. On the other hand in Europe countries in 2012, 62,191 cases of deaths were occurred due to LC, crude rate was 8.4 and ASMR was 3.9 per 100,000. Strong positive Correlation was observed between ASIR and ASMR (r = 0.848; P <= 0.001). HDI have weak negative correlation with ASIR of LC (r = -0.194; P = 0.230), and strong negative correlation with ASMR of LC(r= -0.515; P = 0.001). Conclusion: Increase in the human development index was associated with reduce in incidence and mortality of LC

Hidden Inequality: Financial Aid Information Available to College Students with Disabilities Attending Public Four-Year Institutions

College students with disabilities often encounter systems and processes that do not serve them well. Financial aid, structured in ways that can be particularly burdensome to students with disabilities, is one such system. This study used web-based content analysis of the largest public four-year institution in each state to explore how institutions explain and provide information and resources related to financial aid and whether they are equitable, consistent, and useful for students with disabilities specifically. The findings suggest that available information most often does not assist students in understanding how their disability-related needs can be supported or hindered by financial aid policies. The authors offer recommendations for practices that can improve equitable access to financial aid information