KONSTRUKTIVISTIČKI PRISTUP UČENJU DECE PREDŠKOLSKOG UZRASTA

Constructivism, as a theory about learning and knowledge, is the subject of a large number of both theoretical and empirical researches. Views on the values of constructivism range from advocacy to refutation. What is characteristic of modern educational policy is the focus on productivity, activity and knowledge that will be applicable in real life circumstances. The basic idea of constructivism is based on these assumptions. In this paper, we deal with the question of why this approach is extremely important in early childhood. The preschool period is one of the most sensitive periods in development. It is characterized by numerous regularities and specifics, which should be followed within every program intended for the upbringing and education of children in the preschool period. Preschool children are characterized by curiosity, desire to learn, activity but also short-term maintenance of intentional attention, rapid fatigue and loss of interest in things that are familiar to them. Therefore, the constructivist approach in this period is very suitable, because it does not insist on imposing certain knowledge, but suggests an activity based on interests. The modern preschool institution has the task of providing children with a favorable social and material environment that will encourage development through activity and gaining experience and thus support the realization of their potential. Keywords: constructivism, preschool education, active learning.

Maintenance of Russian as a heritage language in Germany: A longitudinal approach

The study discusses the perspectives of long-term maintenance of Russian as a heritage language in Germany. Based on data from a longitudinal study (2014-2018) we investigated changes in the sociolinguistic situation of 19 adolescent heritage speakers and in their proficiency in Russian. The aim was to investigate whether changes in the participants sociolinguistic situation are reflected in their knowledge of Russian. Data on the sociolinguistic situation were collected via an extensive questionnaire that the participants had to fill out once a year. Language proficiency was measured by experimental tasks targeting different linguistic domains. For the current paper, we used data from the longitudinal measurement of lexical and grammatical proficiency. The results revealed that the participants exposure to Russian input is decreasing in several domains over time, especially concerning media consumption and personal visits to the homeland. Russian is increasingly restricted to interactions with parents, and to educational settings (classes in Russian as a foreign or heritage language). Regarding language attitudes, our participants explicitly consider Russian important primarily for family interactions and cultural factors, but less with regard to career goals. Nevertheless, there was a positive trend in lexical and grammatical proficiency. We interpret these findings as a result of the prolonged exposure to heritage language instruction which leads to a stabilized proficiency in Russian. Given the institutional support and the size of the community, we hypothesize that the perspectives for long-term maintenance of Russian as a heritage language in Germany are better than for Russian heritage speaker communities in other countries.

The Null Piece and Reality Check

Two frameworks are described, within the larger framework of Pure Data, that aim to facilitate the creation and preservation of electronic music that is performed live in real time. These are not part of Pd itself, because they are more directly tailored to a specific application space than Pd should be. They are nonetheless designed, like Pd, to minimize any unnecessary stylistic imposition on creators of electronic music. The Null Piece is a starting point for building live performance patches. It provides basic audio routing and parameter control while leaving other choices as free as possible. Reality Check is an attempt to aid in the long-term maintenance of a musical realization by verifying whether a piece still runs as intended despite the inevitable evolution of hardware and software.

Framework of Prediction Model for Mid- to Long-Term Performance Changes of Urban Railway Facilities Based on Performance Evaluation Reports

To maintain railway facilities in an appropriate state, systematic management based on mid- and long-term maintenance plans through future performance prediction must be carried out. To this end, it is necessary to establish and utilize a model that can predict mid- to long-term performance changes of railway facilities by predicting performance changes of individual sub-facilities. However, predicting changes in the performance of all sub-facilities can be difficult as it requires large volumes of data, and railway facilities are a collection of numerous sub-facilities. Therefore, in this study, a framework for a model that can predict mid- to long-term performance changes of railway facilities through analysis of continuously accumulated performance evaluation results is proposed. The model is a system with a series of flows that can classify performance evaluation results by individual sub-facilities, predict performance changes by each sub-facility using statistical methods, and predict mid- to long-term performance changes of the facility. The developed framework was applied to 36,537 sub-facilities comprising 12 lines of two urban railways in South Korea to illustrate the model and verify its applicability and effectiveness. This study contributes in terms of its methodology in establishing a framework for predicting mid- to long-term performance changes, providing the basis for the development of an automated model able to continuously predict performance changes of individual sub-facilities. In practical terms, it is expected that railway facility managers who allow trade-off between reliability and usability can contribute to establishing the mid- to long-term maintenance plans by utilizing the model proposed in this study, instead of subjectively building them.

Membrane Transporters of the Major Facilitator Superfamily Are Essential for Long-Term Maintenance of Phenotypic Tolerance to Multiple Antibiotics in E. coli

We recently showed that the antibiotic-tolerant subpopulation of bacteria or persisters actively maintain the transmembrane proton motive force (PMF) to survive starvation stress for a prolonged period. This work further shows that the reason why antibiotic persisters need to maintain PMF is that PMF is required to support a range of efflux or transportation functions.

Cell cycle arrest determines adult neural stem cell ontogeny by an embryonic Notch-nonoscillatory Hey1 module

Quiescent neural stem cells (NSCs) in the adult mouse brain are the source of neurogenesis that regulates innate and adaptive behaviors. Adult NSCs in the subventricular zone are derived from a subpopulation of embryonic neural stem-progenitor cells (NPCs) that is characterized by a slower cell cycle relative to the more abundant rapid cycling NPCs that build the brain. Yet, how slow cell cycle can cause the establishment of adult NSCs remains largely unknown. Here, we demonstrate that Notch and an effector Hey1 form a module that is upregulated by cell cycle arrest in slowly dividing NPCs. In contrast to the oscillatory expression of the Notch effectors Hes1 and Hes5 in fast cycling progenitors, Hey1 displays a non-oscillatory stationary expression pattern and contributes to the long-term maintenance of NSCs. These findings reveal a novel division of labor in Notch effectors where cell cycle rate biases effector selection and cell fate.