The state of the art of automatic first order logic theorem provers is advanced enough to be useful in a commercial context. This paper describes a way in which first order logic and theorem provers are used at the Swedish formal verification company Safelogic, to formally verify properties of hardware systems. Two different verification methods are discussed, which both make use of translation...

This paper provides a survey over instantiation based calculi for first-order logic. This kind of calculus, which has the generation of instances of formulae at its core, has been neglected for a long period of time due to the success of resolution based methods. It has experienced a revival in interest in the last decade, as more efficient instantiation based calculi have been developed. After...

The sequence Analyze, Design, Develop, Implement, and Evaluate (ADDIE) provides a powerful methodology for designing computer-based educational materials. Helping students to understand this design process sequence may be achieved by providing them with direct, guided experience. This article examines such help and guidance and the overall learning process from a student’s personal experience. ...

Entering the stage of parenthood can be a stressful time and significantly affect mental health well-being parents by causing lifestyle changes. Thus, this research was created with aim assessing effect parent education on extent depression in fathers, after their first experience parenthood. Members experimental group included 100 husbands pregnant women visiting Ardebil’s healthcare medical c...

Adolescent childbearing has received decreasing attention from academics and policymakers in recent years, which may in part reflect the decline in its incidence. Another reason may be its uncoupling from nonmarital childbearing. Adolescent childbearing became problematized only when it began occurring predominantly outside marriage. In recent decades, there have been historic rises in the rate...

Having children is like investing in a risky project. Postponing birth delaying an irreversible investment. It has option value, which depends on its costs and benefits, particular the additional risks motherhood brings. We develop parsimonious theory of childbearing postponement along these lines. derive implications for asset accumulation, income, optimal age at first birth, childlessness. Th...

In this paper, we present an investigation of patterns in childbearing among foreign-born women in Sweden from the early 1960s and onwards. It is performed in a similar way as a previous study by the author who analyzed childbearing patterns of Swedish-born women in that country by applying event-history techniques to population-register data. We base our study on the longitudinal information o...

Background: In recent decades, families and their stability as an important social institution have changed significantly.
 Objective: This study aimed to investigate the marriage trends, childbearing, divorce changes in Yazd province from 2016 2021 estimate effect of socioeconomic factors on divorce.
 Materials Methods: A cross-sectional was done 2 phases. first phase, ecological (ti...