Study and analysis of the optical absorption cross section and energy states broadenings in quantum dot lasers.

In this report, we measured experimentally the modal absorption spectra of the InP and InAsP quantum dot (QD) lasers using multi-section device technique. The optical absorption cross section ( ) and inhomogeneous broadening for the ground state (GS) and excited state (ES) were analyzed and calculated theoretically from the absorption spectra. The results showed that the InP QD laser exhibited to be and for GS and ES respectively, whereas for the InAsP QD material it was found as and for GS and ES respectively.

Association of Environmental Risk Factors and Personality Traits With Risky Driving Behaviors in a Sample of Young Adults From Saudi Arabia.

Road traffic accidents represent a serious problem in the Kingdom of Saudi Arabia (KSA), with rates of such accidents far exceeding the rates in developed nations. Even so, there remains relatively little knowledge regarding the driving behaviors among Saudi Arabians. The current study sought to address this gap in the literature by examining the environmental and trait-based contributors to risky driving behaviors among male and female drivers in the KSA.

Intelligence and early life mortality: Findings from a longitudinal sample of youth.

The current study examined whether adolescent IQ predicted risk for mortality by the age of 32. Analyses of data from the Add Health revealed that IQ was related to mortality risk, such that respondents with relatively lower IQs were significantly more likely to experience early life mortality when compared to respondents with relatively higher IQs. This association remained statistically significant even after controlling for a host of covariates such as race, gender, involvement in violent behaviors, levels of self-control, and poverty.

The Association Between Psychopathic Personality Traits and Victimization and Exposure to Violence in a Sample of Saudi Arabian Youth.

Psychopathic personality traits have been shown to increase the odds of a wide range of antisocial outcomes. Very little research, however, has examined the association between psychopathy and the risk of personal victimization. The current study address this gap in the literature by examining the association between scores on the Levenson Self-Report Psychopathy scale and a self-reported measure of victimization by using cross-sectional data drawn from a sample of youth residing in Jeddah, Saudi Arabia (N = 311).

The Effects of Low Self-Control and Delinquent Peers on Alcohol, Tobacco, and Drug Use in a Sample of Saudi Arabian Youth.

A considerable amount of research has examined patterns of substance use and the potential explanations of it among samples from the United States and other industrialized nations. To date, however, no research has explored these issues in a sample of Saudi Arabian youth. The current study addressed this gap in the literature and examined the lifetime use of drugs, alcohol, and tobacco among Saudi Arabian youth.

The role of parenting in the prediction of criminal involvement: findings from a nationally representative sample of youth and a sample of adopted youth.

The role of parenting in the development of criminal behavior has been the source of a vast amount of research, with the majority of studies detecting statistically significant associations between dimensions of parenting and measures of criminal involvement. An emerging group of scholars, however, has drawn attention to the methodological limitations-mainly genetic confounding-of the parental socialization literature. The current study addressed this limitation by analyzing a sample of adoptees to assess the association between 8 parenting measures and 4 criminal justice outcome measures.

Prevalence of Cryptosporidium-associated diarrhea in a high altitude-community of Saudi Arabia detected by conventional and molecular methods.

Cryptosporidium diarrhea represents a relevant clinical problem in developing countries. In Al-Taif, a city of Saudi Arabia that lies at an altitude of an around 2 km above the sea level, Cryptosporidium infection seems to be undiagnosed in nearly all clinical laboratories. Furthermore, nothing was published regarding Cryptosporidium-associated diarrhea in this area.

Chemo-sensors development based on low-dimensional codoped Mn2O3-ZnO nanoparticles using flat-silver electrodes.

Background: Semiconductor doped nanostructure materials have attained considerable attention owing to their electronic, opto-electronic, para-magnetic, photo-catalysis, electro-chemical, mechanical behaviors and their potential applications in different research areas. Doped nanomaterials might be a promising owing to their high-specific surface-area, low-resistances, high-catalytic activity, attractive electro-chemical and optical properties. Nanomaterials are also scientifically significant transition metal-doped nanostructure materials owing to their extraordinary mechanical, optical, electrical, electronic, thermal, and magnetic characteristics.

Quality of life in a sample of hypertensive patients attending primary health care facilities in Al-khobar, saudi arabia.

Background: Hypertension is one of the most prevalent chronic conditions in Saudi Arabia. It is the leading risk factor for cardiovascular diseases and a major reason for visits to clinic and prescription of medications. Inspite of this, the degree of its control is not to the optimum.