List different types of power support used in longwall mining and illustrate the structure and working of chock support with example.
Ans - Types of Power Support Used in Longwall Mining:
1. Chock Supports (Hydraulic Powered Roof Supports HPRS): Most commonly used, they are heavy-duty, yieldable supports with multiple hydraulic legs.
2. Shield Supports: Modern variants of chock supports with canopies and base units; they offer better coverage and control.
3. Chock-Shield Supports: A hybrid between
O Espaço Schengen, criado pelo Acordo de Schengen de 1985 e consolidado pelo seu subsequente regulamento, representa uma das maiores conquistas da integração europeia: a livre circulação de pessoas entre os Estados-membros signatários. Portugal, enquanto país integrante deste espaço desde 1995, beneficia diretamente da eliminação dos controlos fronteiriços internos. Contudo, este regime levanta também importantes desafios no que toca à
Operating Cycle
The operating cycle is the average period of time required for a business to make an initial outlay of cash to produce goods, sell the goods, and receive cash from customers in exchange for the goods. This is useful for estimating the amount of working capital that a company will need in order to maintain or grow its business.
A company with an extremely short operating cycle requires less cash to maintain its operations, and so can still grow while selling at relatively small margins.
Meetings, Culture & Teams Cheat Sheet
Collaborative Technologies:
Wikis
Project management tools
Team communication platforms (TCPs)
Internal social networks (ISNs/ESNs)
When to Hold a Meeting:
Requires more than one person
Individuals are interdependent
Multiple decisions or solutions needed
Misunderstandings are likely
Agenda Tips:
Virtual: Include time zone, provide access instructions
Face-to-Face: Expect some to leave early, keep group small, provide background info
No period in peacetime in twentieth-century Russia saw such dramatic change as the years between 1985 and 1991. During this time Russia achieved a greater political freedom than it had ever enjoyed before
d. The break-up itself was remarkably peaceful, in sharp contrast to the extensive violence that accompanied the separation of the constituent parts of Yugoslavia
Generally, Soviet leaders required time to build up their power base, gradually bringing in known supporters who had worked with
Investment decisions are the process by which firms evaluate long-term projects—such as the purchase of fixed assets or new ventures—to determine if they will create shareholder value. These decisions are crucial for a firm's growth and sustainability. When management evaluates a project, they consider both the cash inflows the project will generate (over its useful life) and the outflow (the initial investment), usually comparing the returns to a benchmark cost of capital
Key Considerations:...
1. Process View of the Machine: An Illusion of Exclusivity
A process is essentially a running instance of a program. One of the key abstractions that the operating system (OS) provides is the illusion that each process has exclusive access to the CPU and memory. However, in reality, the CPU and memory are shared among multiple processes.
How the Illusion is Created:
•CPU Time Sharing: The OS rapidly switches between processes (context switching) so that it seems each process has its own CPU....
1 Más de cincuenta millones de latinos viven en Estados Unidos.
2 Están en todas partes, trabajando en diversas profesiones, tanto en áreas urbanas como rurales.
3 Participan activamente en la política con muchos alcaldes, gobernadores, congresistas y jueces hispanos.
4 El grupo mayoritario son los mexicanoamericanos, seguido por cubanoamericanos, puertorriqueños y dominicanos.
5 El número de centroamericanos y sudamericanos, especialmente colombianos, venezolanos, ecuatorianos
Mein Lieblingsfilm ist Toy Story zwei. Der Regisseur dieses Films ist John Lasseter. Es wurde vom
Studio Disney Pixar herausgegeben. Es ist ein Animationsfilm für Kinder. Dieser Film ist sehr
abenteuerlich, rührend und lehrreich. Ich mag ihn seit meiner Kindheit.
Toy Story ist eine Geschichte über Spielzeuge, die Andy gehören. Diese Spielzeuge sind lebendig.
Andy geht ins Sommercamp und lässt die Spielzeuge zu Hause. Ein Spielzeugsammler stiehlt Woody
und will ihn in ein Museum stellen. In seinem