The Relationship Between Emotional Stability and Self-Esteem Among Adolescents (Aged 13-16) in Public Schools in Irbid Qasabah

This study aimed to reveal the relationship between emotional stability and self-esteem among adolescents (aged 13-16) in public schools in Irbid qasabah and to identify the differences in both emotional stability and self-esteem according to the difference in the following demographic variables: gender, age. The sample of the study consisted of (200) male and female students from the basic stage in public school in Irbid qasabah. The researchers used the emotional stability scale and the self-esteem scale as tools of the study. The results of the study indicate that there is a high and positive correlation coefficient between the emotional stability and the self-esteem. It also shows that there is a statistical significance of the predictive capacity for the level of self-esteem through the emotional stability and there are no statistical significance differences in the emotional stability and self-esteem according to the difference of the variables, gender and age. Keywords: Emotional stability, Self-esteem, adolescence. DOI: 10.7176/JEP/11-15-20 Publication date:May 31st 202

Estimating the Parameters of Rayleigh Cumulative Exposure Model in Simple Step-Stress Testing. Natasha Beretvas is an

Assumes the life distribution of a test unit for any stress follows a Rayleigh distribution with scale parameterθ , and that Ln(θ ) is a linear function of the stress level. Maximum likelihood estimators of the parameters under a cumulative exposure model are obtained. The approximate variance estimates obtained from the asymptotic normal distribution of the maximum likelihood estimators are used to construct confidence intervals for the model parameters. A simulation study was conducted to study the performance of the estimators. Simulation results showed that in terms of bias, mean squared error, attainment of the nominal confidence level, symmetry of lower and upper error rates and the expected interval width, the estimators are very accurate and have a high level of precision

On The Weighted BurrXII Distribution: Theory and Practice

We take an in-depth look at the weighted Burr-XII distribution. This distribu-tion generalizes Burr-XII, Lomax, and log-logistic distributions. We discuss the dis-tributional characteristics of the probability density function, the failure rate function,and mean residual lifetime of this distribution. Moreover, we obtain various statisti-cal properties of this distribution such as moment generating function, entropies, meandeviations, order statistics and stochastic ordering. The estimation of the distributionparameters via maximum likelihood method and the observed Fisher information ma-trix are discussed. We further employ a simulation study to investigate the behavior ofthe maximum likelihood estimates (MLEs). A test concerning the existence of size-biasin the sample is provided. In the end, a real data is presented and is analyzed usingthis distribution along with some existing distributions for illustrative purposes

Politeness Strategies in Hotel Service Encounters in Jordan: Giving Directives

This paper examines directive speech act performed by hotel service counters staff in Jordan. It investigates the politeness strategies employed by staff when they give their directives to hotel foreign guests. The data were collected through audiorecording interactions that occurred between the staff, who are nonnative speakers of English, and foreign guests. Findings from the study show that the directives issued by the staff are characterized by significant directness. The study argues that such directives can be perceived as blunt and discourteous and therefore capable of causing face-threat to the interactants. This principally refers to the fact that they appear to give the guests no choice in complying with the request and fail to acknowledge the imposition involved. The study concludes that the frequent use of such direct strategies may refer to the nature of institutional encounters where the staff enjoy more power due to their institutional knowledge of offering services or information that the guests need as well to the staff\u27s right to ask questions to achieve the purpose of their task-oriented transactions. Furthermore, and more importantly, the staff\u27s use of direct forms may be due to the need for clarity and efficiency in giving directives. The study implies that hotel managers and hospitality curricula designers can benefit from the findings to design materials and manuals that help hotel staff to use appropriate level of directness when they issue their directives to foreign guests to avoid potential face-threat and potential social misunderstandings which can lead to pragmalinguistic and sociopragmatic failure

Langendorff’s isolated perfused rat heart technique: a review

The Langendorff’s isolated perfused small mammalian heart represents the optimal compromise in the conflict between the quantity and quality of data that can be acquired from an experimental model versus its clinical relevance, especially in relation to ischemia-reperfusion injury. We analyzed the important recent, as well as standard older articles to highlight the importance of Langendorff’s isolated heart technique using the rat as an experimental animal model. The retrograde perfusion of isolated rat heart preparation is the most commonly used technique in cardiovascular research experiments with many advantages. The longevity of this preparation is one of the main advantages. From the moment an ex vivo preparation is established, it starts to deteriorate and the rate will depend on number of factors such as the skill of the operator, the species of animal, age, initial heart rate, choice and composition of the perfusion fluid, flow rate, presence or absence of various drugs, preload pressure, and the temperature at which the studies are carried out. Recently, various techniques and variables measured have undergone modifications. This review article has attempted to address many of the issues, developments, and applications which will assist investigators to make the best possible use of this experimental model using the rat

Optimum Times for Step-Stress Cumulative Exposure Model Using Log-Logistic Distribution with Known Scale Parameter

Abstract: In this paper we assume that the life time of a test unit follows a log-logistic distribution with known scale parameter. Tables of optimum times of changing stress level for simple step-stress plans under a cumulative exposure model are obtained by minimizing the asymptotic variance of the maximum likelihood estimator of the model parameters at the design stress with respect to the change time. Zusammenfassung: In diesem Aufsatz wird angenommen, dass die Lebensdauer einer Testeinheit einer log-logistischen Verteilung mit bekanntem Skalenparameter genügt. Tabellen für die optimalen Zeitpunkte eines Wechsels des Belastungsniveaus für einfache step-stress Pläne unter einem kumulativen Expositionsmodells erhält man durch Minimieren der asymptotischen Varianz des Maximum Likelihood Schätzers der Modellparameter zur zulässigen Spannung bezüglich der Wechselzeit

A harmony search algorithm for nurse rostering problems

Harmony search algorithm (HSA) is a relatively new nature-inspired algorithm. It evolves solutions in the problem search space by mimicking the musical improvisation process in seeking agreeable harmony measured by aesthetic standards. The nurse rostering problem (NRP) is a well-known NP-hard scheduling problem that aims at allocating the required workload to the available staff nurses at healthcare organizations to meet the operational requirements and a range of preferences. This work investigates research issues of the parameter settings in HSA and application of HSA to effectively solve complex NRPs. Due to the well-known fact that most NRPs algorithms are highly problem (or even instance) dependent, the performance of our proposed HSA is evaluated on two sets of very different nurse rostering problems. The first set represents a real world dataset obtained from a large hospital in Malaysia. Experimental results show that our proposed HSA produces better quality rosters for all considered instances than a genetic algorithm (implemented herein). The second is a set of well-known benchmark NRPs which are widely used by researchers in the literature. The proposed HSA obtains good results (and new lower bound for a few instances) when compared to the current state of the art of meta-heuristic algorithms in recent literature

Characterization of greater middle eastern genetic variation for enhanced disease gene discovery

The Greater Middle East (GME) has been a central hub of human migration and population admixture. The tradition of consanguinity, variably practiced in the Persian Gulf region, North Africa, and Central Asia1-3, has resulted in an elevated burden of recessive disease4. Here we generated a whole-exome GME variome from 1,111 unrelated subjects. We detected substantial diversity and admixture in continental and subregional populations, corresponding to several ancient founder populations with little evidence of bottlenecks. Measured consanguinity rates were an order of magnitude above those in other sampled populations, and the GME population exhibited an increased burden of runs of homozygosity (ROHs) but showed no evidence for reduced burden of deleterious variation due to classically theorized ‘genetic purging’. Applying this database to unsolved recessive conditions in the GME population reduced the number of potential disease-causing variants by four- to sevenfold. These results show variegated genetic architecture in GME populations and support future human genetic discoveries in Mendelian and population genetics

Colloquial Arabic Teaching at Ca' Foscari

Since the '70s Ca' Foscari teachers have been facing the challenge of diglossia that typifies the Arab world where the oral use of Standard Arabic is reserved to specific situations, while colloquial varieties of the same language are used for ordinary conversations. Thus, learning Colloquial Arabic is a paramount need to communicate with native Arabic speakers. Moreover, diglottic proficiency is necessary to access several contemporary cultural outputs of the Arab world. This article describes the features of Arabic diglossia and instructional approaches meant to cope with the phenomenon. It then offers a brief account of Colloquial Arabic teaching at Ca' Foscari, which has been a European vanguard in the field

Effects of hospital facilities on patient outcomes after cancer surgery: an international, prospective, observational study

Background Early death after cancer surgery is higher in low-income and middle-income countries (LMICs) compared with in high-income countries, yet the impact of facility characteristics on early postoperative outcomes is unknown. The aim of this study was to examine the association between hospital infrastructure, resource availability, and processes on early outcomes after cancer surgery worldwide.Methods A multimethods analysis was performed as part of the GlobalSurg 3 study-a multicentre, international, prospective cohort study of patients who had surgery for breast, colorectal, or gastric cancer. The primary outcomes were 30-day mortality and 30-day major complication rates. Potentially beneficial hospital facilities were identified by variable selection to select those associated with 30-day mortality. Adjusted outcomes were determined using generalised estimating equations to account for patient characteristics and country-income group, with population stratification by hospital.Findings Between April 1, 2018, and April 23, 2019, facility-level data were collected for 9685 patients across 238 hospitals in 66 countries (91 hospitals in 20 high-income countries; 57 hospitals in 19 upper-middle-income countries; and 90 hospitals in 27 low-income to lower-middle-income countries). The availability of five hospital facilities was inversely associated with mortality: ultrasound, CT scanner, critical care unit, opioid analgesia, and oncologist. After adjustment for case-mix and country income group, hospitals with three or fewer of these facilities (62 hospitals, 1294 patients) had higher mortality compared with those with four or five (adjusted odds ratio [OR] 3.85 [95% CI 2.58-5.75]; p<0.0001), with excess mortality predominantly explained by a limited capacity to rescue following the development of major complications (63.0% vs 82.7%; OR 0.35 [0.23-0.53]; p<0.0001). Across LMICs, improvements in hospital facilities would prevent one to three deaths for every 100 patients undergoing surgery for cancer.Interpretation Hospitals with higher levels of infrastructure and resources have better outcomes after cancer surgery, independent of country income. Without urgent strengthening of hospital infrastructure and resources, the reductions in cancer-associated mortality associated with improved access will not be realised