the design of everyday things pdf

... common, as do the difficult things. When things are visible, they tend to be easier The Design of Everyday Things real needs of the user? I expected my students to visit the homes of potential ... (VCR) so intimidating. The Psychology of Everyday Things This book is about the psychology of everyday things. POET empha- sizes the understanding of everyday things, things with knobs and dials, ... Rotating the knob with the pictures of the speaker at either side makes the sound come entirely out of the front speakers (when the knob is all the way over to one side), entirely out of the rear...

Ngày tải lên: 26/05/2014, 07:46

... Yet the cumulative effect of these small changes can radically improve the design. It is the exact reverse of the normal notion of software decay. With refactoring you find the balance of work ... this is the section of the book you'll come back to often. In this book I describe the fruit of a lot of research done by others. The last chapters are guest chapters by some of these people. ... modifications to the code. Reducing the amount of code won't make the system run any faster, because the effect on the footprint of the programs rarely is significant. Reducing the amount of code...

Ngày tải lên: 01/08/2014, 09:20

... reason the brief texts concentrate on the roll- ing bearing aspects of the applications. The operation of the machine allows conclusions to be drawn about the operating conditions which dictate the ... roughening of the surfaces (increased running noise). Bearing dimensioning The size of the bearings is dictated by the shaft diame- ter, which in turn is based on the anticipated vibra- tions. The bearing ... grinding the bearing inner rings and the roll body to finished size in one setting at a roll surface tempera- ture of 220 °C .The inner rings and the roll body can be ground together due to the fact...

Ngày tải lên: 23/01/2014, 04:20

... residues. Analysis of the distribution of the electrostatic potential on the surface of the molecule reveals the ampiphilic character of the helix (Fig. 4A). Schematic representation of the charge distribution ... rather helical structure (84% of residues), which is considered to be the active conformation of the hormone [38,40]. The changes engineered in the sequence of the peptide, either through the ... imposed by the introduction of the novel residues in the sequence of the molecule and the differences between the CRH analogue and the native structure [15] are also discussed. The major goal of our...

Ngày tải lên: 17/03/2014, 10:20

Ngày tải lên: 23/03/2014, 05:22

... improving the latency of the other branch will have no observable effect at the output). In the case that no information is available from the end point monitor concerning the source of the problem, then the ... of these metrics is optionally a component of the VM, the end-point monitor can keep statistics on the components that are in VM. Together with the vector of weights, these statistics allow the ... segments along these four dimensions, which indicates the relative importance of each of these components to the end-point QoS. The most interesting of these dimensions, lifetime, is the mechanism by...

Ngày tải lên: 27/06/2014, 23:20

Ngày tải lên: 11/08/2014, 05:22

Ngày tải lên: 11/08/2014, 05:22

Ngày tải lên: 11/08/2014, 05:22

Ngày tải lên: 11/08/2014, 05:22

Ngày tải lên: 11/08/2014, 05:22

Ngày tải lên: 11/08/2014, 05:22

Ngày tải lên: 11/08/2014, 05:22

Ngày tải lên: 13/08/2014, 05:21

... 119 pcf Example 4. Design the steel lying in the East-West direction of the mat shown below with external dimensions of 42 feet by 74 feet. The columns are all 15”by 15”, the LF = 1.6, f c ’ ... being designed for a small office building with a total live load of 250 kips and dead load of 500 kips. Find: (a) the depth D f for a fully compensated foundation, (b) the depth D f if a soft ... in the x and y values, which these values are found by using the x-y coordinate system off the mat foundation. Determine the average soil reaction. (92.34(78.8)69.8) 79 6 avg qpsf ++ ∆== Therefore,...

Ngày tải lên: 16/10/2012, 10:43

Ngày tải lên: 16/12/2012, 15:24

... or savings (S) and profits earned in the state (). ã Other variables are determined by forces largely outside of the region and serve to bring money into the state, generating growth and ultimately ... Estate Sources of Regional Demand . ã Some variables are determined directly by the size of a state’s economy (Income or Output) : imports (M), Federal Taxes (T), consumption or savings (S) and profits ... growth in activity, level of activity N: national growth of activity ã Share: a matter of timing ã Mix: Historic industrial structure ã Competitive: our companies versus theirs [innovation –vs-...

Ngày tải lên: 09/12/2013, 20:15

... support for the jacks. The two rear connectors are bridged as the jack acts as a loop with the front connectors 75 Ohm-terminated. When a jack is inserted into any of the front inputs, the corresponding ... devices. The following diagram illustrates how, with the addition of patch panels, an operator can change the ratio of optical nodes attached per upstream input in the CMTS, resulting in the following ... resulting in the following advantages: ã As the ratio changes, there is no effect on the fixed cabling as all the fixed cabling is on the rear side of the patch panels ã Changes can be made without...

Ngày tải lên: 10/12/2013, 18:15

... http://mba-programming.blogspot.com http://mbaprogram.travellerspoint.com/ Page 1 Trên đỉnh núi của động Từ Thức Over the top of Tu Thuc mountain Nga Sơn – Thanh Hóa March 1, 2010 http://mba-programming.blogspot.com...

Ngày tải lên: 12/12/2013, 20:15

... at an area of code writing that is at the mercy of the skill and logic of the programmer. PHP gives you all kinds of rope, and it’s up to you as the developer not to hang yourself (or others). Function ... syntax, and not just a few times. There is another level of inconsistency that can also trip you up: the position of the parameters in string functions is the reverse of the parameters in array functions ... broad range of speakers. There are a vast number of other PHP resources out on the Web, in blogs, and in book form. Take some time to look through some of the links that are offered on the websites mentioned...

Ngày tải lên: 14/12/2013, 22:15