Neighborhood micro-renewal: a perspective of gene in China

PurposeImprovement of the environment quality and human development has become the main focus of modern urban development. Micro-renewal is a relatively people-oriented model of urban transformation compared with traditional renewal modes. To improve the theoretical system of neighborhood micro-renewal from a microcosmic perspective, a comprehensive analysis of neighborhood residents' cognition is needed. The purpose of the study is to explore the possibilities and methods of applying gene theory into the study of neighborhood micro-renewal.Design/methodology/approachAccording to the meme theory, the research explores the genetic analysis of neighborhood micro-renewal. The cross-over studies with “gene theory” from natural science to social science are analyzed and the neighborhood micro-renewal system was constructed from the perspective of micro-participants and micro-objects. Moreover, the concept of neighborhood “micro-renewal gene” was put forward. Finally, the authors show three application scenarios of public participation with a specific neighborhood micro-renewal project.FindingsThe cross research on urban studies with gene theory could be divided into three scales and four research fields. The characteristics of carrying out neighborhood micro-renewal in China could be summarized as micro-participants and micro-objects. Residents' cognition could be considered as “micro-renewal gene” in refer to meme theory. The application scenarios of introducing “micro-renewal gene” into the study of neighborhood renewal are of great potentialities.Originality/valueNeighborhood micro-renewal system was constructed from the perspective of micro-participants and micro-objects. Moreover, neighborhood “micro-renewal gene” was proposed and applied into the study of this system in refer to meme theory.

LAYING PRODUCTIVITY WITH CONSTANT RENEWAL IN WATER FOUNTAINS DURING HEATWAVE

This study aimed to evaluate the effect of the water renewal system of drinking fountains in laying hens and its relationship with productivity. For this, 5,000 laying hens of the Dekalb White line were used in each shed, which received food and water ad libitum. The warehouses had a conventional typology, Californian type. For this, a digital water renewal system was installed in three nipple drinking fountains in one of the warehouses (treatment 2 - T2) and the other remained without the water renewal system (treatment 1 - T1). Using Thermo hygrometers, the average air temperature (° C) and the average relative humidity of the air (%) were measured. For the water temperature (° C), a water renewal system (Flushing Control® - Lubing model) was used, which carried out the renewal of the birds' drinking water six times a day. Feed consumption (g / bird / day), water consumption (ml), egg production (%) and mortality (%) were evaluated. During the study period, using data from the weather station, the occurrence or not of heatwaves was defined. A completely randomized design (DIC) was performed in a 2 × 2 factorial scheme (two sheds: conventional system and with water renewal; with and without heatwave) and the data were subjected to analysis of variance (5%). It concludes the efficiency of the use of the water renewal system for zootechnical performance, during the heatwave, but the use of air conditioning systems and measures to reduce the direct radiation in the birds and installation is still necessary. There was a positive influence (p <0.05) in the use of the water renewal system for water temperature (° C), water consumption (ml) and egg production (%). In the presence of a heatwave, the feed and water consumption variables were lower (p <0.05). There was no interaction between the systems and the presence of heatwaves. It is concluded that the use of a water renewal system has benefits in zootechnical indexes, however, it does not interact with the presence of heatwaves.