94 research outputs found
Scattering of neutron-halo nucleus 6He around the Coulomb barrier using microscopic model
No full textEvaluating the Cultural Content of English for Palestine Secondary Stage Textbooks in the Light of Universal Trends
No full textThis study aimed at evaluating the cultural content of English for Palestine Secondary Stage (Grade 11 and 12) Textbooks in order to find out to what extent the content of these two textbooks reflect the Palestinian and the Non Palestinian culture. Since textbooks have a central position in Palestinian schools, the main reason for carrying out this study was the need to find out if these newly released textbooks match the current universal trends in TEFL: Intercultural language learning / teaching. Following the descriptive analytical approach, quantitative analyses of the cultural content of (Grade 11 and 12) textbooks were conducted. To collect the needed data, the researcher used one main tool: a content analysis card. This card was constructed by the researcher herself after reviewing a number of previous studies, journals, books and related literature. To validate the tool, this content analysis card was exposed to seven experts in the fields of TEFL, stylistics, linguistics and education from The Islamic University and, El Aqsa University inGaza. In the light of those experts' comments and suggestions the final form of the analysis card was constructed. To ensure the external or inter-rater reliability of the present study, the researcher asked for the cooperation of another researcher who analyzed the two books along with her. Based on the analysis of data, the following were the most important conclusions : More than half of the entire activities included in the two textbooks analyzed are culturally oriented. There is a focus on introducing the Non-Palestinian cultures more than the Palestinian culture. A focus on introducing the Products of the Non-Palestinian cultures more than the Palestinian culture is evident. Practices of both the Palestinian and the Non-Palestinian cultures are introduced with, almost, equal reference. However, the opposite is true for the perspectives. Within the Non-Palestinian subdivision the focus on the Target cultures: products, practices, perspectives comes first. Wealthy presentation of various countries and cultures from different parts of the world; thus providing a sense of intercultural learning is obvious. Very limited opportunities for comparing cultures is evident. Absence of authentic texts for either Palestinian or Non-Palestinian countries. There is no special focus on providing Palestinian youth with phrases and suitable expressions to talk about and introduce their Palestinian Issue to the world via English. Absence of Islamic topics was detected as well. Based on the results provided by the current study, the researcher recommended giving coherent directives in terms of guidance on the teaching of culture. Designing teacher training programs that equip teachers with cultural teaching knowledge and related cultural activities was also suggested. In addition, active use of authentic materials along with preparing an enrichment material that include Islamic and Palestinian Issues was recommended
Postmortem injection of calcium chloride Improves camel meat tenderness
No full textTwenty-four hours postmortem longissimus muscles of camel
carcasses were injected to 0 (control), 200 and 300 mM food grade
CaCl2 at 10% (wt/wt), vacuum- packaged and stored at 2ºC for 6 days.
Drip loss, cooking loss, sarcomere length, and shear force were
determined. At 6 days post-treatment, samples with CaCl2 had higher
(P <0.05) drip loss compared to non-injected ones, however; cooking
loss was not affected (P >0.05). Muscle sarcomere length was not
significantly affected (P >0.05) but shear force values for treated
samples were lower (P <0.05) than those of controls with ratios varied
from 23.4% and 32.4% lower for the 200 and 300 mM injections,
respectively, and therefore; calcium chloride injection is an effective
method for improving camel meat tenderness.Corresponding Author:
Dr. Ibraheem A. Al-Sheddy, Associate professor - Meat Science and Technology, Department of Food Science and Nutrition, College of Food and Agriculture Sciences, P.O. Box-2460, Riyadh -11451, Saudi Arabia. Email: [email protected]
MICROSCOPICAL ANALYSIS OF THE REACTION CROSS-SECTIONS OF <sup>11</sup>Li+<sup>12</sup>C and <sup>22</sup>C+<sup>12</sup>C ELASTIC SCATTERING
No full text Total reaction cross-sections of the two neutron halo nuclei 11Li and 22C elastic scattering from 12C target at E = 30–1000 MeV/nucleon have been analyzed using the eikonal phase shift based, for the first time, on the semi-phenomenological nucleon density. The obtained results reasonably agree with those of previous theoretical calculations as well as the corresponding experimental data. </jats:p
The effects of fusel oil water content reduction on performance and emissions of SI engine with fusel oil – gasoline blended fuel
No full textalcohol fuels are produced from several sources and have less heating value then fossil fuel. Fusel oil is a by-product obtained through the fermentation of some agricultural products such as beets, cones, grains, potatoes, sweet potatoes, rice and wheat. The high research octane number and motor octane number (RON 106 and MON 103), high oxygen content (30.23% wt) and single boiling point of fusel oil indicated it can be used as a fuel in SI engines. On the other hand, the higher water content of fusel oil (around 10-20%) led to a lower heating value by 31% compared to gasoline. Also, the higher water content of fusel oil effect negatively on the combustion duration, thereby engine performance and emission are affected. Comprehensive analyses of the fusel oil properties, performance and emissions have been performed. The data of fusel oil-gasoline properties were analyzed statistically in different ways to indicate the effects of fusel oil before and after water content extraction on the test fuels properties. The experimental conducted with direct injection SI engine run with fusel oil-gasoline blends and pure gasoline as the baseline fuel at different open throttle valve positions (% of WOT) as engine loads and engine speeds (rpm). Response surface methodology (RSM) based multi-objective optimization was applied in this work to determine the optimal blend ratio of fusel oil –gasoline before and after water extraction (FBWE10, FBWE20, FAWE10, and FAWE20) on the performance and emissions. The heating value and carbon content of fusel oil improved significantly after extracting the water content by 13% and 7%, respectively, while the oxygen content reduced. According to the statistical analysis of test fuel properties results (fusel oil-gasoline blends), the heating value, oxygen, and carbon content have statistically significant effects on the test fuels as the fraction of fusel oil increased especially after water content extraction. The engine power has improved with the extraction of water content and the highest brake power is registered with FAWE10 under rich fuel (λ<1). The lowest brake specific fuel consumption (BSFC) is reported to be 275 g/kW.h with gasoline while the highest BSFC is with FBWE10 which is reported to be 285 g/kW.h. Furthermore, the BSFC has decreased on average by 6.8% and 1.7% with FAWE10 and FAWE20, compared to FBWE 10 and FAWE20 respectively. The water content of fusel oil led to the limitation of the engine combustion thereby the NOx emission reduced. The blended fuel has insignificant effects on brake power while the highest impact of blended fuel was on BTE and BSFC responses. The extracted water content from fusel oil (FAWE10 and FAWE20) has a statistical significance in order to increase the brake thermal efficiency (BTE), NOx emission and decrease the brake specific fuel consumption (BSFC) and HC emissions while having insignificant effects on brake power. Thus, the best solution was with 20% of fusel oil after water extraction (FAWE20) at higher load and engine speed. Finally, the validation of the results showed a good agreement with the experimental data and the maximum percentage of error which is less than 5%.The findings from this study will make significant contributions to the future applications of fusel fuel in an internal combustion engine by improving the heating value
A new hypothesis may explain human parthenogenesis and ovarian teratoma: A review study
No full textAbstract Parthenogenesis (PG) is a rare phenomenon occurring in humans, and understanding this may help us develop an explanation for such occurrences. Moreover, it may help reveal the cause of idiopathic ovarian teratoma (OT). We aim to explain the occurrence of PG and OT in humans based on a new hypothesis. Previous literature has been searched through relevant scientific websites and international journals on the causes and mechanisms of PG and OT in humans. The previous literature on human PG was sparse and mostly contained case reports. It appears that human PG is not as rare as previously reported but may occur spontaneously, resulting in OT formation. The difference between PG and sexual reproduction is that PG has no embryonic diversity. The biopsied embryonic samples in the PG correspond exclusively to those of the maternal side. Spontaneous PG in humans often degrades or leads to formation of OT. The cause and mechanism of spontaneous PG remain unclear in the available literature. Here, we hypothesized that in some cases the secondary oocyte and first polar body enclosed in the zona pellucida may fuse together to form a single cell that restores the diploid number of chromosomes and initiates cell division to form PG. It may go unnoticed or be represented by the OT. Future studies are recommended to investigate this hypothesis
Microscopic few-body and Gaussian-shaped density distributions for the analysis of the He-6 exotic nucleus with different target nuclei
No full textBoztosun, Ismail/0000-0001-9668-6307;WOS: 000285432300001The elastic scattering angular distributions of He-6 projectile on different medium and heavy mass target nuclei including C-12, Al-27, Ni-58, Zn-64, (65)Cn, (197)An, (208)pb and (209) Bi have been examined by using the few-body and Gaussian-shaped density distributions at various energies. The microscopic real parts of the complex nuclear optical potential have been obtained by using the double-folding model for each of the density distributions and the phenomenological imaginary potentials have been taken as the Woods-Saxon type. Comparative results of the few-body and Gaussian-shaped density distributions together with the experimental data are presented within the framework of the optical model. (C) 2010 Elsevier B.V. All rights reserved.Turkish Science and Research Council (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [109T373, 110T388, BIDEB-2219]; Turkish Academy of Sciences (TUBA-GEBIP)Turkish Academy of Sciences; Akdeniz UniversityAkdeniz UniversityThis work was partly supported in part by the Turkish Science and Research Council (TUBITAK) with Grant No. 109T373 and 110T388, the Turkish Academy of Sciences (TUBA-GEBIP), Akdeniz University Scientific Research Projects Unit. M. Aygun acknowledges the support through TUBITAK Integrated Ph.D. Program fellowship BIDEB-2219 grant and also thanks to Dr. Mesut Karakoc for his comments
An interpreting physician is essential to avoid inaccurate diagnosis of PET-CT: A case report
No full textAbstractThe presence of a pulmonogist in the process of interpreting chest PET-CT is quite crucial ,as the clinical findings will prevent any miss leading interpretations that result an inaccurate diagnosis
Ozone Holes: Where and Size, Bad and Good
No full textStratospheric ozone is considered a natural sunscreen that protects life from harmful ultraviolet (UV) rays from the Sun for hundreds of millions of years. Ozone holes consist of exceptionally depleted ozone in stratosphere over the Antarctic, North Pole, and Tibetan mountains with measured concentration less than 220 Dobson Units. Studies showed the incidence of skin cancer increases by 2% for each percent of ozone reduction. Chlorofluorocarbons (CFCs) and Hydrochlorofluorocarbons (HCFCs) used in HVAC and refrigeration devices are said to be the perpetrators that release chlorine when leaked to ground air, diffuse to the stratosphere, dissociate to active ions, and catalyze and destroy ozone molecules (2 O3  3 O2). Ozone depletion and ozone holes in recent decades have caught huge global attentions and worries. Banning ozone-depleting refrigerants such as CFCs and HCFCs has been enforced through international agreements for the past two decades.Why do ozone holes appear in places where little population and effectively no HVAC and refrigeration are used? Why aren't there any holes over Los Angeles, New Mexico city, Shanghai, Paris, Hong Kong, where millions of ACs and refrigerators are used? Why is the distribution of UV radiation on Earth ground is found high near the equator, where ozone layer is not thin or dilute? Why do the ozone holes shrink or expand over different seasons of the year, if they are solely man-made? Are increasing incidences of skin cancer and eyes problem are primarily caused by depletion of stratospheric ozone? People believe ozone holes are bad; can they lead to any good outcome to humanity? This paper will collect and compare scientific data and take a different approach in seeking the truths of ozone depletion and holes. The authors will strive to address some of the questions mentioned above and explain the phenomena about ozone hole, its size, its location, and any bad and good impacts and the role of depleting chemicals, CFCs.This Research Day material is made accessible to the global community via the web
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