HSE

Gas metal arc welding (GMAW), sometimes referred to by its subtypes metal inert gas (MIG) welding or metal active gas (MAG) welding, is a semi-automatic or automatic arc welding process in which a continuous and consumable wire electrode and a shielding gas are fed through a welding gun. A constant voltage, direct current power source is most commonly used with GMAW, but constant current systems, as well as alternating current, can be used. There are four primary methods of metal transfer in GMAW, called globular, short-circuiting, spray, and pulsed-spray, each of which has distinct properties and corresponding advantages and limitations

 Originally developed for welding aluminium and other non-ferrous materials in the 1940s, GMAW was soon applied to steels because it allowed for lower welding time compared to other welding processes. The cost of inert gas limited its use in steels until several years later, when the use of semi-inert gases such as carbon dioxide became common. Further developments during the 1950s and 1960s gave the process more versatility and as a result, it became a highly used industrial process. Today, GMAW is the most common industrial welding process, preferred for its versatility, speed and the relative ease of adapting the process to robotic automation. The automobile industry in particular uses GMAW welding almost exclusively. Unlike welding processes that do not employ a shielding gas, such as shielded metal arc welding, it is rarely used outdoors or in other areas of air volatility. A related process, flux cored arc welding, often does not utilize a shielding gas, instead employing a hollow electrode wire that is filled with flux on the inside

Portable FastStone Capture 6.2

توسط این نرم افزار می توانید از کلیه قسمتهای دسکتاپ تنها با یک کلیک عکس با فرمتهای مختلف تهیه کنید. FastStone Capture دارای امکانات جالب و کاملی برای عکس گرفتن از قسمتهای مختلف سیستم است که جالب ترین اون قابلیت عکس برداری از صفحه یک سایت به صورت کامل است.

دانلود

کد:

An explosion is a sudden increase in volume and release of energy in an extreme manner, usually with the generation of high temperatures and the release of gases. An explosion creates a shock wave

Types of explosives

 Natural

Explosions do not commonly occur in nature. Most natural explosions arise from volcanic processes of various sorts. Explosive volcanic eruptions occur when magma rising from below has much dissolved gas in it; the reduction of pressure as the magma rises causes the gas to bubble out of solution, resulting in a rapid increase in volume. Explosions also occur as a result of impact events. On other planets, volcanoes and impacts cause explosions with various frequency

Job Safety Analysis is one of the safety management tools that can be used to define and control the hazards associated with a a certain process, job or procedure. Job Safety Analysis is a term used interchangeably with Job Hazard Analysis and Risk Assessment. The purpose of a JSA is to ensure that the risk of each step of a task is reduced to ALARP (As Low As Reasonably Practicable).

The analysis starts with a summary of the whole job process. This is broken down into smaller steps and listed in table form. The hazards involved in each single step are identified, then the control measures to eliminate, reduce or mitigate each hazard are identified and described. By this means every aspect of the whole process is analyzed and safe methods of work determined

Process

 When is a JSA Required

Some type of risk analysis should be performed before every job. Some tasks are routine and the hazards and controls well understood. For routine tasks consider using a Standard Operating Procedure, a set of standing orders that control the known hazards. For tasks that are complex, unusual, difficult, require the interaction of many people or systems or involve new tools or methods, a JSA should be performed.

Ergonomics is the scientific discipline concerned with designing according to the human needs, and the profession that applies theory, principles, data and methods to design in order to optimize human well-being and overall system performance. [2] The field is also called human engineering, and human factors.

Ergonomic research is performed by those who study human capabilities in relationship to their work demands. Information derived from these studies contributes to the design and evaluation of tasks, jobs, products, environments and systems in order to make them compatible with the needs, abilities and limitations of people.[3

MyPhone Explorer V1.7.0

توسط این نرم افزار می توانید به وسیله کامپیوتر کلیه قسمت های گوشی های سونی اریکسون از جمله sms ها و contact ها رو مدیریت و ویرایش کنید همچنین از کلیه قسمت های گوشی نیز می توانید پکاپ تهیه کنید.

دانلود

An earplug is a device that is meant to be inserted in the ear canal to protect the wearer's hearing from loud noises or the intrusion of water, foreign bodies, dust or excessive wind

Protection from water

Operation, Maintenance and Emergency Management Requirements for Dams
Requirements for preparing Operations, and Maintenance Manuals and Dams Safety Emergency plans

size:106 kb 

dsc12.pdf

Firefox Ultimate Optimizer 1.1

نرم افزاری جانبی برای بروزر فایرفاکس که باعث می شود بروزر شما بسیار سبک تر وسریع تر کار کند و مهمترین تغییری که در عملکرد فایرفاکس ایجاد می کند کاهش بسیار چشم گیر حجم مموری اشغال شده در فایر فاکس است،

Concise Oxford English Dictionary

این هم دیکشنری انگلیسی آکسفورد با فرمت جاوا و قابل نصب روی انواع تلفن همراه.

تاثیر ساعات مختلف خواب در سلامتی
تبیان: داشتن عادات غذایی صحیح و توجه به زمان خوابیدن و استراحت برای حفظ سلامت بدن مهم است تا بتواند مواد مغذی را جذب و مواد زائد را دفع کند.

برای سالم زیستن، باید خواب راحت و آرامی داشته باشیم. به موارد زیر دقت کنید تا اهمیت خوابیدن برای شما روشن گردد:

ساعت 9 تا 11 شب: زمانی است برای از بین بردن مواد سمی و غیر ضروری که این عملیات توسط آنتی اکسیدان ها انجام می شود. در این ساعت بهتر است بدن در حال آرامش باشد. در غیر این صورت اثر منفی بر روی سلامتی خود گذاشته اید.

ساعت 11 تا 1 شب: عملیات از بین بردن مواد سمی در کبد ادامه دارد و شما باید در خواب عمیق باشید.