The pupil-to-teacher ratio (PTR) is the result of the division of the number of pupils in the cycle –for instance, primary education– by the number of teachers working in that cycle (IIEP-UNESCO Pôle de Dakar, 2016c).

The Global Positioning System ( GPS ), originally Navstar GPS, [2] is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. [3] It is one of the global navigation satellite systems (GNSS) that provides geolocation and time information to a GPS receiver anywhere on or near.

Figure 1. Nervous systems vary in structure and complexity. In (a) cnidarians, nerve cells form a decentralized nerve net. In (b) echinoderms, nerve cells are bundled into fibers called nerves. In animals exhibiting bilateral symmetry such as (c) planarians, neurons cluster into an anterior brain that processes information.

What is the need for a system of control and coordination in an organism?Class 10 Science Chapter 7 Control and coordination #cbse #education #knowledge #sci.

216.444.6568 What are hormones? Hormones are chemicals that coordinate different functions in your body by carrying messages through your blood to your organs, skin, muscles and other tissues. These signals tell your body what to do and when to do it. Hormones are essential for life and your health.

It is a passageway for sperm and fluids from the reproductive system and urine from the urinary system. While reproductive fluids are passing through the urethra, sphincters contract tightly to keep urine from entering the urethra. The male urethra is divided into three regions. The prostatic urethra is the proximal portion that passes through.

Single-line diagram Single-line diagram (SLD) provide functional information about the electrical design of a system. This type of drawing is also referred to as a one-line drawing. The name of these drawings is derived from the fact that there will be one line between components on the drawing

Astronomers discover the last three planets the Kepler telescope observed before going dark by Jennifer Chu, Massachusetts Institute of Technology With the help of citizen scientists,.

The lightning protection installation systems are the best explanation of how ships are protected from lightning. The installation starts at the top of the monkey island from the radar mast, progressing towards the hull. The critical elements handle lightning from the time of contact up to its final mitigation.

Uranus is the third-largest planet by size and the fourth largest by mass in the solar system. Uranus has a diameter of roughly 37,673 miles (55,800 kilometers) and is about 14.5 times the mass of Earth. Uranus is the seventh furthest planet from the sun, averaging over 1.8 billion miles (2.9 billion kilometers) away from the sun.

Functions of Operating Systems Process Management CPU Scheduling CPU Dispatcher First Come First Served Scheduling (FCFS) Shortest Job First Scheduling (SJF) Priority Scheduling (PR) Round Robin Scheduling (RR) Multiprocessor Scheduling Memory Management Contiguous Memory Allocation Paging Segmentation Virtual Memory File System Management

सिस्टम सॉफ़्टवेयर (System software) कंप्यूटर हार्डवेयर को नियंत्रित एवं संचालित करने और ऍप्लीकेशन सॉफ्टवेयर को एक आधार उपलब्ध कराने वाला कंप्यूटर सॉफ़्टवेयर.