TLB pre-loading for Java applications

The increasing memory requirement for today\u27s applications is causing more stress for the memory system. This side effect puts pressure into available caches, and specifically the TLB cache. TLB misses are responsible for a considerable ratio of the total memory latency, since an average of 10% of execution time is wasted on miss penalties. Java applications are not in a better position. Their attractive features increase the memory footprint. Generally, Java applications TLB miss rate tends to be multiples of miss rate for non-java applications. The high miss rate will cause the application to loose valuable execution time. Our experiments show that on average, miss penalty can constitute about 24% of execution time. Several hardware modifications were suggested to reduce TLB misses for general applications. However, to the best of our knowledge, there have been no similar efforts for Java applications. Here we propose a software-based prediction model that relies on information available to the virtual machine. The model uses the write barrier operation to predict TLB misses with an average 41% accuracy rate

The Role of Self-Awareness in Predicting the Level of Emotional Regulation Difficulties among Faculty Members

University faculty members seek to regulate emotions to achieve professional and social goals in the work environment. The process of emotion regulation is influenced by self-awareness, as self-awareness is an important predictor of self-regulation, and the outcomes of the self-regulation process depend, in part, on the level of self-awareness. The purpose of the present paper was to examine whether or not self-awareness is used to predict emotional regulation difficulties among faculty members. The current quantitative study was designed using a survey research design. The participants comprised 172 faculty members from Philadelphia University in Jordan, the Arab Open University in Jordan, and Al Falah University in the U.A.E. Data were collected using the Self-Awareness Scale (SAS) and Emotional Regulation Difficulties Scale (ERDS). The researchers revealed that increasing the self-awareness subscale (self-critical) decreases the non-acceptance of emotional responses. The researchers also found that when there is an increase in the self-awareness subscale (desire for realistic awareness), there is a tendency toward lower levels of non-acceptance of emotional responses and difficulties engaging in goal-directed. Researchers also came to that an increase in the self-awareness subscale (self-reflection) decreases the non-acceptance of emotional responses, difficulties engaging in goal-directed and impulse control difficulties. The researchers concluded there is a need to work on university faculties' self-awareness and emotional regulation to balance realistic awareness and emotional responses related to task engagement and control difficulties. Based on the findings, it is concluded that it is necessary to pay attention to enhancing self-awareness and emotion regulation among faculty members in general and conduct more scientific studies on emotional regulation difficulties to examine their relationship with other variables. Doi: 10.28991/ESJ-2023-07-04-017 Full Text: PD

Weighted Gharaibeh Distribution with Real Data Applications

In this paper, a new continuous one parameter distribution called weighted Gharaibeh distribution(WGD) is introduced. Its moment generating function, moments and related measures, order statistics,hazard rate function, mean residual life function, Renyi entropy, mean deviations about mean and median,Stochastic ordering, Bonferroni and Lorenz curves are investigated and addressed. The parameter of theWGD is estimated using the maximum likelihood method. Applications to two real data sets are presentedand showed that the WGD has the adequacy of tting such data better than Gharaibeh distribution andsome other existing one parameter distributions

Effect of a Classroom-based Intervention on the Social Skills of Students with Learning Difficulties

Children with learning difficulties often face challenges in social skills, hindering their ability to adjust and interact within society. The present study was designed to evaluate the effectiveness of a training program designed to enhance the social skills of individuals with disabilities. The quasi-experimental study involved 20 primary school students with learning difficulties exhibiting deficits in social skills in the United Arab Emirates. To evaluate the level of social skills of the sample children, a social skills assessment scale was employed, which was developed by the researchers. The assessment scale consisted of 24 statements that were organized into three dimensions based on previous research and theoretical frameworks. The results of the present study showed that the training program significantly and positively impacted the social skills of these children. There were statistically significant disparities between the mean ranks of the experimental group and the control group's scores on the social skills assessment scale after program completion. In conclusion, the study recommends integrating the developed training and similar programs into the public and private education curricula, including both government and private schools, to improve the social communication abilities of children with learning difficulties. Doi: 10.28991/ESJ-2023-SIED2-011 Full Text: PD

Nonparametric lack-of-fit tests in presence of heteroscedastic variances

Doctor of PhilosophyDepartment of StatisticsHaiyan WangIt is essential to test the adequacy of a specified regression model in order to have cor- rect statistical inferences. In addition, ignoring the presence of heteroscedastic errors of regression models will lead to unreliable and misleading inferences. In this dissertation, we consider nonparametric lack-of-fit tests in presence of heteroscedastic variances. First, we consider testing the constant regression null hypothesis based on a test statistic constructed using a k-nearest neighbor augmentation. Then a lack-of-fit test of nonlinear regression null hypothesis is proposed. For both cases, the asymptotic distribution of the test statistic is derived under the null and local alternatives for the case of using fixed number of nearest neighbors. Numerical studies and real data analyses are presented to evaluate the perfor- mance of the proposed tests. Advantages of our tests compared to classical methods include: (1) The response variable can be discrete or continuous and can have variations depend on the predictor. This allows our tests to have broad applicability to data from many practi- cal fields. (2) Using fixed number of k-nearest neighbors avoids slow convergence problem which is a common drawback of nonparametric methods that often leads to low power for moderate sample sizes. (3) We obtained the parametric standardizing rate for our test statis- tics, which give more power than smoothing based nonparametric methods for intermediate sample sizes. The numerical simulation studies show that our tests are powerful and have noticeably better performance than some well known tests when the data were generated from high frequency alternatives. Based on the idea of the Least Squares Cross-Validation (LSCV) procedure of Hardle and Mammen (1993), we also proposed a method to estimate the number of nearest neighbors for data augmentation that works with both continuous and discrete response variable

Impulsiveness among Undergraduates from the United Arab Emirates and Jordan: Role of Socio-demographic Variables

# BACKGROUND Some undergraduate students may appear impulsive in their behavior without taking enough time to think, and impulsiveness may vary according to gender, academic specialization, and academic level. # OBJECTIVE This study investigated the differences in impulsiveness between undergraduates of different gender, academic specializations, and academic years at three private universities in the United Arab Emirates and Jordan. # METHOD The research design of the study was a survey in nature. The researchers collected data online using a translated Arabic version of the Barratt Impulsiveness Scale (BIS-11) as described in Patton et al..^1^ A sample of 334 undergraduates was selected using the convenient non-probability sample technique. # RESULTS To analyze data, the researchers deployed descriptive and inferential statistics and found no significant differences between the students in the subscales of motor impulsiveness, non-planning, attentional impulsiveness, and the total scale score according to gender, academic specializations, and academic years variables. # CONCLUSION The researchers concluded that undergraduates have a moderate level of impulsiveness; except for attentional impulsiveness, the results indicated that the average student's score on the subscale was low. Motor impulsiveness, non-planning impulsiveness, and attentional impulsiveness were not significantly different between males and females, academic specialization, academic year variables, and their interaction. The limitations and implications of these findings are discussed

Attitudes Toward and Images of Children with Special Needs

The media and literature play significant roles in shaping children’s attitudes toward children with special needs. Indeed, several research studies indicate that people with special needs were often portrayed negatively and inaccurately in children’s literature books. To date, no study has been found that investigated the available Arabic and/or English children’s literature books in the UAE to see how people with special needs are portrayed. The aim of this study, therefore, was twofold: a) to analyse children’s literature which feature books with special needs characters, and b) to examine the differences between Arabic and English children’s literature portrayal of people with special needs. One hundred and nine children’s literature books were reviewed. Findings of this study indicate that people with special needs were portrayed negatively in English and Arabic children’s literature books

Influence of Storage Temperature and Duration of Tomato Leaf Samples on Proline Content

In arid and semi-arid countries such as Jordan, shortage in water sources might affect agricultural development and reduces the effectiveness of economic benefits of most crops planted in such areas. Tomato is an important agricultural crop and faces severe drought stress due to climate changes, therefore, measurement of proline accumulation in plant tissues is used as an indicator for drought stress tolerance. This research was conducted at Jarash University Campus in northern Jordan. A field experiment was carried out to investigate the impact of different storage temperature (+4ºC, - 20ºC and -80ºC) and different storage durations (0, 3, 6 and 11 weeks) on proline content in five different Jordanian tomato landraces. Results indicated that the average free proline content for samples tested directly after leaves collection was 7.1 µmol/g. Proline content in leaves stored at +4 ºC for 3, 6, and 11 weeks was 4.8, 1.8, and 1.1µmol/g, respectively, while for -20ºC was 11.8, 7.9, and 9.5 µmol/g for samples stored for 3, 6, 11 weeks respectively. In contrast the highest values for these parameters were obtained from samples stored at -80ºC, the average measured values of free proline content were 9.5, 7.8, and 12.9 µmol/g at 3, 6, and 11 weeks of storage, respectively. Based on the results obtained by this research, it is recommended to measure proline content directly after leaves collection. However, for large number of samples, keeping the samples at -20ºC not longer than six weeks could be a solution. Finally, we highly recommend the development of in-field method for measurement of free proline content

Evaluation of the Wound Healing Potential of Hypericum triquetrifolium Turra: An Experimental Animal Study and Histopathological Examination

The wound healing potential of the aerial parts of Hypericum triquetrifolium Turra (Hypericaceae) was evaluated using an in vivo excision wound model in rats. Adult male Sprague Dawley rats were randomly assigned into seven groups; blank vehicles (olive oil and petroleum jelly), negative control, treatments [H. triquetrifolium ethanolic extract in petroleum jelly (5% and 10%) and H. triquetrifolium olive oil macerate (100 and 200 g/L)], and positive control (MEBO). Treatments were applied topically once daily until the wounds had completely healed. Wound areas and contraction rates were calculated, and full-thickness samples of the healed skin were collected for histopathological examination. H. triquetrifolium ointment (5%) showed the best wound healing activity with statistically significant differences when compared with the MEBO, petroleum jelly, and the negative control groups. Tissue sections were histopathologically examined in terms of re-epithelialization, granulation tissue development, collagen deposition, inflammatory cell infiltration, angiogenesis, and ulcer formation to support the in vivo excision wound model findings. H. triquetrifolium ointment (5%) showed the best histopathological scores in both re-epithelialization and ulcer formation. For quality control purposes, a high-performance liquid chromatography (HPLC) method was used to quantify key marker compounds in the extract, namely hypericin and rutin which showed a content of 0.64% and 4.46% (w/w), respectively. Based on the experimental results, H. triquetrifolium ointment (5%) exhibits remarkable wound healing properties at various stages of the wound healing process. Further investigations to prove its safety and efficacy in different types of wounds and to uncover its cellular mechanisms are warranted.This work was funded by the Deanship of Research, Jordan University of Science and Technology (Grant number: 122/2017), and Qatar University