Cell Structure Sample Clauses

Cell Structure. IV.I.2.c.i. Beneficiaries in the demonstration group and the comparison group will be grouped into cells according to characteristics that influence expected costs (e.g., residing in a nursing facility, serious and persistent mental illness, age).

Cell Structure. Most body cells have three main parts: • the cell membrane which forms the boundary of the cell. Materials move in and out of the cell through the cell membrane. • the nucleus which controls the functions of the cell, particularly growth and division. • the cytoplasm which is a fluid-like substance within the cell and contains many of its functional parts. Most of the chemical changes taking place in a cell occur in the cytoplasm. The basic structure of a body cell is shown in Figure 6. Cell membrane Nucleus Cytoplasm Nuclear membrane Figure 6 Basic Structure of a Body Cell The nucleus in the human body contains 46 chromosomes which each consist of fine fibrous strands made up of genes. These genes are composed of proteins and small segment of deoxyribonucleic acid (DNA). This DNA carries all the genetic information about the physical and mental characteristics of a person. It also enables this information to be passed from one generation of cells to the next. [The picture on the left shows the structure of DNA strands] The different parts of human body cells are summarised Table 2a. Summary of Cell Structure Table 2a Cell Part Description Cell membrane Allows the movement of material in and out of the cell. Cytoplasm Where most chemical processes occur. Nucleus Controls the cell. Chromosomes Consist of fibrous strands of genes. Genes Consist of proteins and DNA. DNA Carries genetic information.

Cell Structure. In DIVAS, a cell is composed of four components: Cell Information Management Module (CIMM); a Control Module, a Communication Module and a Synchro- nizer. Cells communicate with each other and with agents by sending messages over the Message Transport Service. The purpose of the Communication Module is to manage these messages which are expressed in KQM L. The synchronizer implements mechanisms to synchronize agents perceptions of the cell and their actions. The Cell Information Management Module (CIMM) manages the minimal data a cell needs to function. It implements the models discussed in section 4. The Control Module is the “brain” of the cell. It analyzes the the messages received by the Communication Module, the signals received by the synchronizer, and the data stored in the CIMM and determines the next course of action (i.e., new cell state).

Cell Structure. The Environment Management Module (EMM) acquires the location nodes from a data source and, once the data has been initialized, notifies the Environ- ment Graph Management System (EGMS) to create the cell controllers. The Cell Control Module is implemented by the CellController class. The CellController is responsible for dividing the environment into manageable quad- rants. In a world environment, this would equate to some division along longi- tude and latitude demarcations. The demarcation depends on the granularity with which the user wants to visualize the world. The CellController is coupled with the CIMM for state maintenance. Thus, the CellController contains references to the following classes: Synchronizer, Self- Model, AgentModel, and a concrete ObjectModel. It also aggregates the Linked- CellModel, as well as the LocationGraph (one class in the Topological Model). The SelfModel class describes the identification of the controller. It contains a unique identifier as well as a parameterized boundary constraining its height and width. The LinkedCellModel class associates the controller with its neighboring cells. There are at most eight neighboring cells and, depending upon location in the cell network, there are as few as three. The Topological Model consists of several classes: LocationNode, Location- Graph, and PathSegment. The LocationGraph class describes paths available through the environment. The LocationGraph consists of nodes and edges con- necting the nodes. A LocationNode describes a physical location in the two- dimensional environment denoted by an x and y component. In the broad sense, edges link two nodes together. In the small, however, an edge can span many