Use Of DP Research Articles

A paradigm shift in the fences of a new play affordance city

ABSTRACT Social changes are reshaping play affordance patterns and redefining the concept of play space fences. This study explores this shift by examining four “childcare support bases” in Setagaya ward, Japan. We provided a historical overview of play affordances and explored how fences reflect the contemporary understanding of new play affordances. We categorized the play environment into new designated play spaces (NDPS) and carved-out play spaces (CPS). These were observed from the perspectives of both operators and users. We conducted four unstructured interviews to understand the operator’s viewpoint. From the user’s perspective, we interpreted fences perceived through social media phenomenologically, drawing on Merleau-Ponty’s concept of “perception through embodied experience.” The study sites in Setagaya ward encompass NDPS created and operated through new play affordances. Each NDPS forms a flexible cluster of play spaces by generating temporary CPS around it. Institutionalized play assistants facilitate an alliance between NDPS and CPS, acting as a non-physical fence permeable to the city and expandable through CPS. By reinterpreting fences in the context of new play affordances, we envision the integrated use of DPS and CPS in urban space planning, transcending the traditional conflict between them. This study offers a comprehensive examination of these concepts together.

Use of dried papaya skin in the diet of growing pullets

1. The chemical composition of dried papaya (Carica papaya) skin (DPS) was determined and the effect of diets containing different concentrations of this ingredient (0, 30, 60 and 90 g/kg) was studied using growing pullets as experimental animals. 2. Crude protein concentration was determined to be 229 g/kg and metabolisable energy content was estimated to be 6.4 MJ/kg. 3. Use of DPS in the diet up to 90 g/kg did not produce any significant difference in weight gain, food intake, food conversion and protein efficiency when compared with birds that received the control diet. 4. Survivability of growing pullets fed on DPS was 100%, as in the control group. 5. It was concluded that DPS can safely be used up to 90 g/kg in the diet of growing pullets.

Diaphragmatic plate electrode stimulation of the hamster diaphragm

We developed a new technique of diaphragmatic stimulation by apposing plate electrodes directly against the diaphragm (DPS) in adult Golden Syrian hamsters. The electrophysiological and the mechanical responses to DPS were compared with those with phrenic nerve stimulation. In four animals, evaluation of the electromyogram before and after curare demonstrated that plate electrode stimulation occurred via the phrenic nerve filaments. In four animals, similar transdiaphragmatic pressure was produced at maximal current with DPS and phrenic nerve stimulation. Using DPS increasing current beyond a certain level resulted in recruitment of muscles besides the diaphragm. In six animals, an external abdominal pressure of 15 cmH2O produced maximal transdiaphragmatic pressure, suggesting that the diaphragm was contracting near optimal position with this external abdominal pressure. In another four animals the twitch and pressure-frequency characteristics with the use of DPS were found to be reproducible over a 2-h period. We conclude that DPS is an effective method of diaphragmatic stimulation and should prove to be a valuable technique to study the diaphragm in long-term studies of small rodents.

DPS — A digital simulation language for the process industries

A digital simulation language program, DPS, developed for the unsteady state simulation of multicomponent process systems, is described. Although a continuous system simulation language, the program allows for the specification of a variety of discrete events of the type encountered in process applications. Typical of these events are the opening/closing of valves, starting/stop ping pumps, etc. DPS uses powerful graphical techniques for sorting and sieving the model equations. The use of DPS is demonstrated by simulating the dynamic behaviour of two dif ferent types of systems: a simple multicomponent mixing pro cess and a control system described by transfer functions.