gopers.my.id

Saat ini dengan berbagai perkembangan teknologi tentu ada semakin banyak jenis alat seperti gadget dan alat elektronik. Untuk peralatan elektronik ini sendiri tetap menjadi satu kebutuhan masyarakat yang tidak bisa dipisahkan bahkan menjadi barang yang paling cari. Berikut ini adalah beberapa peralatan elektronik yang masih menjadi primadona dengan banyaknya orang yang mencarinya. 1. HT

The most commonly used mesh is probably welded mesh made of approximately 5 mm thick steel wire and having 100 mm square openings. The steel wire may be galvanised or not. The alternative has been an interwoven mesh known as chain link mesh.  The disadvantage of traditional chain link mesh compared with weld mesh has been the difficulty of applying shotcrete successfully through the smaller openings available.  This difficulty has now been overcome in a high strength, light weight chain link mesh with 100 mm openings which is easy to handle and can be made to conform to uneven rock surfaces more readily than weld mesh. A feature of this mesh is the fact that the intersections of the wires making up the squares in the mesh are twisted rather than simply linked or welded. Roth et al. (2004) describe static and dynamic tests on this mesh.  Mesh of this type is being used successfully at the Neves Corvo Mine, Portugal, where it has been particularly successful in rehabilitati...

It is the differential electrical potential between the anode (+) and the cathode (-) which is key to the moist corrosion example described above. This differential is primarily generated by the difference in oxygen availability between the edge and the centre of the water droplet. Differential potentials can also be generated by the presence (and contact) of dissimilar metals immersed in an oxygenated electrolyte solution (Illston et al., 1979; Bryson, 1987).  Corrosion induced by such a coupling can be extremely aggressive and can result from the designed use of dissimilar metals (steel cables with aluminum plates or anchors) or from the presence of cablebolts in a rich sulphide ore.  Indeed, rock bolts in sulphide ore bodies have significantly reduced service lives (Hoey and Dingley, 1971; Gunasekera, 1992). Corrosion cells can also be generated on cablebolt surfaces at the point where abrupt transitions in environment occur. These include differential grout coverage, for e...

It is perhaps remarkable to find that, although rock and cable bolts have been used in underground mining and construction for several decades (if not more than 100 years in the case of rock bolts), bolt elements and bolting systems continue to evolve and improve.  The papers presented to this symposium detail advances made in fully encapsulated resin and cement grouted bolts (Mikula 2004, Mould et al. 2004, Neindorf 2004), one pass mechanized bolting (Mikula 2004, Neindorf 2004) and bulbed cables (Yumlu & Bawden 2004), for example. The developments in ground support practices that have accompanied greater productivity, larger excavations and larger equipment are especially well-illustrated in the paper by Neindorf (2004) describing the evolution of ground support practices at the Mount Isa mine over the past 30 years. In a detailed and valuable review paper, Windsor (2004) concludes that “the quality and performance of cable bolts used to stabilise temporary, non-entry, produc...

Discount car rentals are so hard to come by, and in recent times, discount car rentals simply mean you pay less for something less, and lets face it, sometimes when you pay less for a car rental, you end up with something that looks more like a farmer’s truck than a car. It’s hard to come up with a budget friendly rental, so how do you get a discount car rental these days? Well here are a few tips to boost the value of your money, car rental wise. 1.A good way to essentially, get a discount car rental is to, once you return the car, fill the tank with the cheapest no-name gas you could find, not for revenge or anything, but because car rental companies, require customers to fill the gas tank before returning it, and it you don’t they’ll fill it for you with the company pump but at a higher price, now we don’t want that, so be sure to fill your tank before you return the car. 2.To get the discount off of discount car rental, make early reservations, some car rental companies give discou...

Europe, a continent filled with so much culture and history. A lot of people actually flock to Europe year after year to visit its sights and experience its rich culture. The modern yet still quite laid-back lifestyle that Europeans have been known for has always fascinated tourists, from being true-blue sophisticates who are very much adept to fashion, literature, history, culture and the arts, this is why a lot of people have been drawn to Europe’s simple yet elegant charm time and time again. Of course, traveling around Europe will be really much of a hassle if you don’t have the proper transportation to quickly and conveniently take you from one spectacular tourist destination to another. The most probable solution to this dilemma is a car, ever ready, you’re sure to get to where you want to go at your leisure. Europe car rental however may be quite tricky to some. Let’s face it, a lot of the countries in the European continent isn’t really comprised of English-speaking people and ...

In today’s world of competitive marketing and cutthroat competition, a customer can’t really predict whether the deal he/she is closing will benefit her or not, most of the time most, consumers, just go on with the deal just to avoid all the hassle of inquiring for more economic alternatives, or discounts. This also applies to car rentals, nowadays, it’s hard to call anything a cheap car rental, with the inflation rate of products, continuing gas price increase it’s hard to keep product prices down, so here are a few tips to keep your car rentals cheap, even if every other factor is making it expensive. 1.Reserve your cheap car rental internet sites instead of over the counter ones. Internet sites, offer internet only discounts which could very beneficial for you, cheap car rentals can be achieved by being witty, put discounts like these to your advantage and you’re sure to save a lot. 2.One way to get cheap car rentals is to try to get the most out of your rental. Most car rentals req...