Investor decision making has always been affected by two factors: risk and returns. Considering risk, the investor expects an acceptable return on the investment decision horizon. Accordingly, defining goals and constraints for each investor can have unique prioritization. This paper develops several approaches to multi criteria portfolio optimization. The maximization of stock returns, the pow...

‎The problem of shrinkage testimation (test-estimation) for the Rayleigh scale‎ ‎parameter θ based on censored samples under the reflected‎ ‎gamma loss function is considered‎. We obtain the minimum risk‎ ‎estimator among a subclass and compute its risk‎. ‎A shrinkage‎ ‎testimator based on acceptance or rejection of a null hypothesis&lr...

this paper is to identify the determinants of risk management and measure its impact on strategic management in tondgooyan petrochemical company during 2013-2014 in mahshahr city. the research method used is a descriptive-survey one. the population contains 200 employees. to test the hypotheses, the researcher uses a questionnaire consisted of 45 questions. the results are tested by kolmogorov-...

Having a distant relationship with parents seems to increase the risk of developing a more negative global self-esteem. This article describes a longitudinal study of 1,090 Norwegian adolescents from the age of 13-23 (54 % males) that explored whether peer acceptance can act as a moderator and protect global self-esteem against the negative effects of experiencing low closeness in relationships...

In this paper, we address the question if there is a disruption of individual mobility by self-driving cars ahead. In order to answer this question, we take the user perspective and conduct a longitudinal study of social media data about self-driving cars from Twitter. The study analyzes 601,778 tweets from March 2015 to July 2016. We use supervised machine learning classification to extract re...

This study examined the barriers and facilitators of HIV counseling, testing, and referral service (HIV CTR) acceptance among 278 youth aged 12-24 years old. Participants completed a questionnaire before health education sessions with trained counselors. Information was collected on individual characteristics, HIV testing acceptance, risk behaviors, reasons for having never been tested, and wha...

PURPOSE The purposes of this study were to: (1) assess knowledge, attitudes, and behaviors of North Carolina general dentists (GDs) regarding American Academy of Pediatrics (AAP) dental referral guidelines; and (2) determine factors that influence pediatricians' ability to comply with AAP guidelines. METHODS One thousand GDs were surveyed to determine barriers toward acceptance of physician r...

In this paper, a group acceptance sampling plan is developed for a multiple number of items to be tested simultaneously in a tester. This study provides information for the group acceptance sampling plan using the total number of failures under the truncated life test to establish the percentile life quality assuming that the product lifetimes are Birnbaum-Saunders distributed. The required num...

BACKGROUND The written informed consent form (WICF) provides information that must be written in simple, easily understood language, highlighting voluntary participation safeguards, risks, possible benefits, and procedures. Currently, the possibility that research subjects do not fully understand the text of the WICF or their rights as participants, despite having signed the WICF and agreed to ...

Patient navigation is now a standard component of cancer care in many oncology facilities, but a fundamental question for navigator programs, especially in medically underserved populations, is whether or not individuals will use this service. In this study, we evaluated acceptance of a community-based navigator program for cancer control and identified factors having significant independent as...