On population aging in China

By 2040, the proportion of the elderly in China's population will be 20.9%. 3 problems that must be discussed are 1) the cost of supporting this large number of elderly people, 2) the relative decrease in the working population, and 3) the increased problems of older people. In 2040, the proportion of the working population will be 63.5% of the population, the aged will form 20.8% of the population, and children will form 15.7%. In 1982, the proportions were 61.6% working ages, 4.9% elderly, and 33.6% children. Expenditures on dependent aged people in the future will balance that on children now because elderly people do not remain consumers as long as children do and children's educations, cost more than health care for the elderly does. The standstill or decrease in the absolute number of people will lead to a stop in the growth of the absolute number of the working population. Production will then depend on the quality rather than the quantity of population. A low standard of living and backward social welfare facilities are problems in caring for the aged in China today. What is now being practiced in China in caring for the aged is a combined system of care by the individual, the collective, and the state. The overwhelming majority of the rural elderly are supported by their families, while the majority of the urban elderly are supported by the collective.     

On the rational distribution of Chinese population]

In 1949, the population distribution in China was characterized by the following distinct features. First, it was unbalanced, with high density in the eastern regions, in the plains, and in areas adjacent to railroads, river navigation routes and other transportation axes. Low population density was found in the western regions, mountainous regions, and areas far from transportation routes. Second, Hans were largest in number and distributed throughout the country, with major concentration in the eastern regions, while the minorities constituted about 10% of the total population and were distributed mainly in the far southwestern and northwestern areas. Third, over 89% of the 540 million of the population was distributed in rural areas while only about 10% in towns and cities, with high densities in some coastal cities. During the past 3 decades, the unbalanced nature of China's population has remained basically unchanged. This can be attributed to factors relating to natural conditions and resources, productivities, socioeconomic conditions, and technological development in different regions. In order to achieve a rational distribution of the Chinese population the following measures should be taken: 1) controlling the birth rate of the Hans and increasing the population of minorities; 2) moving the population of the dense areas to the border provinces in the western regions to develop their natural resources and to elevate the living standards; 3) modernizing the rural areas; 4) strictly controlling the industrial developments of large cities and their population growth; and 5) strictly restricting the unplanned migration of population to and from cities.     

A tentative discussion on the reproduction of population in China]

Population reproduction is a physiological phenomenon necessary to continue the human race, replacing the older generation with a new one. Population reproduction is also closely related to material production. Both are mutually restricted and supportive of each other. Population reproduction can be divided into 2 types: 1) short life span and rapid generation replacement or high birth rate and high mortality rate, and 2) long life span and slow generation replacement or low birth rate and low mortality rate. Since 1949 China has significantly reduced the mortality rate because of the improvement of our health system and working conditions and the increased living standard. The birth rate, however, still remains high because we are a developing country and our levels of education, science, and technology are quite low. This intermediate stage of low mortality rate but high birth rate also existed in most developed countries for several decades. China's large population and high population growth rate severely inhibit the development of social production and the achievement of the "Four Modernizations." The only way to resolve this contradiction of population reproduction and development of productivity is to control the population growth. Family planning and advocation of 1 child per couple are important strategic tasks in realizing the "Four Modernizations."     

Independent domination in subcubic graphs

Journal of Combinatorial Optimization - A set S of vertices in a graph G is a dominating set if every vertex not in S is adjacent to a vertex in S. If, in addition, S is an independent...     

Toward a carnivalesque analysis of hacking: A qualitative study of Iranian hackers

This study sought to analyze Iranian hackers’ lived experiences based on the concept of the carnival of crime in cultural criminology. Fifty-four in-depth semi-structured interviews were conducted with young hackers. Moreover, their behaviors were observed along with those of other hackers. The data were coded through a thematic analysis using MAXQDA software. The study's findings indicated that cyberspace had created a carnivalesque utopia that allowed the young Iranian hackers to experience the pleasure of crime. By trespassing the rational frameworks of the modern world and altering the trends of knowledge creation as a means for subjugation, Iranian hackers contribute to the meaning-construction policies of those in power and challenge authoritarian aesthetics by invading their electronic domain. It was also found that the carnivalesque lives of hackers provided them with a variety of opportunities for disrupting the rhythms of production and creating an underground carnivalesque economy based on their level of knowledge.     

Behavioural problems of adolescents in secure residential youth care: Gender differences and risk factors

Adolescents in secure residential care mostly suffer from serious behavioural problems, often accompanied by trauma and adverse family circumstances. This paper presents findings of a comparison of behavioural problems and risk factors of 255 boys and girls (aged 12 to 18 years) in secure residential care in the Netherlands and their association with behavioural problems. A cross-sectional design and standardized questionnaires were used to measure behavioural problems and individual and familial risk factors. By using independent-sample t tests, the severity of these factors in boys and girls was compared, and by using structural equation modelling (SEM), associations between these factors and behavioural problems were investigated. The findings of the study show that post-traumatic stress disorder (PTSD) symptoms, maladaptive emotion regulation, impaired perceived competence and internalizing behavioural problems were more severe in girls than in boys. Boys experienced more severe externalizing behavioural problems and more family problems than girls. Maladaptive emotion regulation, PTSD symptoms, perceived competence and parenting problems were related to behavioural problems. The results indicate that treatment for girls should address PTSD symptoms, perceived competence and maladaptive emotion regulation and that extra attention for family problems in the treatment of boys is warranted.     

SCHEDULING HYBRID FLOWSHOPS IN PRINTED CIRCUIT BOARD ASSEMBLY LINES*

We treat a three‐stage hybrid flowshop for the production of printed circuit boards (PCB), suggested to us by a real‐life production situation. The problem is to determine a schedule that minimizes the makespan for a given demand profile over a finite planning horizon. We propose a global procedure that utilizes genetic algorithms and three subproblems. The performance of the procedure is evaluated via experimentation over thousands of problem realizations that are randomly generated. The experimental results show the efficiency of the global procedure and provides qualitative answers to the allocation of machines to the various stages.     

Early social referencing predicts object mastery motivation in infancy: Social antecedents of object mastery motivation

The researchers sought to understand the typical development of social referencing and object mastery motivation in infancy and to determine the relationship between social referencing and object mastery behaviors in infants from 7 to 22 months of age. The study included 36 infants who were followed as part of a longitudinal study of at-risk infants but were not determined to need care in the neonatal intesive care unit at birth. Both mastery behaviors of persistence and success showed a statistically significant effect of age, while social behaviors remained stable from 7 to 22 months. Social behaviors at 7 and 10 months were correlated with persistence at 22 months and success at 16 to 22 months demonstrating that early social referencing predicts object mastery behaviors in later infancy. Further research should determine if this trend extends to early childhood.     

The potential impact of introducing a social security system in the State of Palestine: A computable general equilibrium approach

This article assesses the potential impact for the State of Palestine (West Bank and Gaza) of enforcing the enactment of the currently suspended Social Security Law (No. 19 of 2016). Using a computable general equilibrium model, we simulate different scenarios associated with the enactment of the social security system on key macroeconomic variables, such as GDP, private consumption, government spending, investment and employment, for the period 2020–2030. We evaluate the influence on the economy of introducing a social security system for private-sector workers, as set out in the 2016 law, and compare the simulation results of each scenario to the baseline. In each scenario, we consider different options concerning severance payment duration and different options for the investment strategy of social security contributions. However, for employees in Gaza, the article does not consider severance payments due to economic difficulties and the Israeli closure policy.