http://homepage.mac.com/splash6/Splash6/index.htmlEngineering for the Real WorldenIan TurnerCopyright 2009 Ian Turner2009-05-03T10:20:32+01:00 hourly 1 2000-01-01T12:00+00:00 Sun, 07 Jun 2009 23:33:43 +0100Ian TurnerCarbon Neutral2009-04-16T07:51:49+01:00http://homepage.mac.com/splash6/Splash6/files/MyCarbonNeutralFuture.html#unique-entry-id-29http://homepage.mac.com/splash6/Splash6/files/MyCarbonNeutralFuture.html#unique-entry-id-29Ian TurnerRisk Engine2009-03-23T15:41:40+00:00http://homepage.mac.com/splash6/Splash6/files/TheFutureOfRiskEngine.html#unique-entry-id-27http://homepage.mac.com/splash6/Splash6/files/TheFutureOfRiskEngine.html#unique-entry-id-27Ian TurnerRisk Engine2009-03-23T15:09:28+00:00http://homepage.mac.com/splash6/Splash6/files/AQuickApology.html#unique-entry-id-26http://homepage.mac.com/splash6/Splash6/files/AQuickApology.html#unique-entry-id-26Ian TurnerEngineering design2009-03-13T07:29:49+00:00http://homepage.mac.com/splash6/Splash6/files/TheSolutionSpaceAndDesignCreativity.html#unique-entry-id-25http://homepage.mac.com/splash6/Splash6/files/TheSolutionSpaceAndDesignCreativity.html#unique-entry-id-25Ian TurnerExcel2009-02-17T20:56:38+00:00http://homepage.mac.com/splash6/Splash6/files/QuickBitOfReformattingInExcel.html#unique-entry-id-22http://homepage.mac.com/splash6/Splash6/files/QuickBitOfReformattingInExcel.html#unique-entry-id-22Ian TurneriWork2009-02-03T06:03:36+00:00http://homepage.mac.com/splash6/Splash6/files/AddingMonteCarloAnalysisToiWorkNumbers.html#unique-entry-id-21http://homepage.mac.com/splash6/Splash6/files/AddingMonteCarloAnalysisToiWorkNumbers.html#unique-entry-id-21Ian TurneriWork2009-01-10T12:03:22+00:00http://homepage.mac.com/splash6/Splash6/files/ReviewOfiWorkNumbers09ForEngineers.html#unique-entry-id-20http://homepage.mac.com/splash6/Splash6/files/ReviewOfiWorkNumbers09ForEngineers.html#unique-entry-id-20Ian TurnerReflections2008-12-22T07:17:40+00:00http://homepage.mac.com/splash6/Splash6/files/ReflectionsOnTheQuaterbackProblem.html#unique-entry-id-19http://homepage.mac.com/splash6/Splash6/files/ReflectionsOnTheQuaterbackProblem.html#unique-entry-id-19Ian TurnerApplications2008-12-12T06:41:10+00:00http://homepage.mac.com/splash6/Splash6/files/MyTricksWithTextExpander.html#unique-entry-id-18http://homepage.mac.com/splash6/Splash6/files/MyTricksWithTextExpander.html#unique-entry-id-18]]>Ian TurnerCocoa2008-12-12T05:07:41+00:00http://homepage.mac.com/splash6/Splash6/files/ExampleCocoaCode.html#unique-entry-id-16http://homepage.mac.com/splash6/Splash6/files/ExampleCocoaCode.html#unique-entry-id-16Ian TurnerGeomechanics2008-11-30T19:53:12+00:00http://homepage.mac.com/splash6/Splash6/files/WhatAreDipAndDipDirection.html#unique-entry-id-13http://homepage.mac.com/splash6/Splash6/files/WhatAreDipAndDipDirection.html#unique-entry-id-13The first concept to understand is the dip of a joint. We shall initially consider a single planar joint within the rock such as a shear or fault. To define the direction of the joint in three dimensional space we typically use two values. By doing this we can use the conventional 360 degrees that is commonly used to define angles and directions. The two angles typically used are called Dip and Dip Direction. To consider Dip and Dip Direction we need to consider a line on the plane of the joint. Imagine a grid of lines on this plane, with one set of lines running across the plane at the same height, effectively forming contours not rising or falling across the plane. The second set of lines on this grid will run perpendicular to the contours. This second set of lines would be the steepest line that could be formed on the plane. This line is the key line from which we measure Dip and Dip Direction. The Dip Direction can be determined by viewing the plane and the line we have drawn on plan. The orientation of the line can be specified using the 360 degrees of a compass bearing. At this point it is worth noting that this value is not absolute, but that the baseline needs to be specified. Normally the baseline orientation is North but this could be true north, grid north or magnetic north. Having specified the direction of the line, we need to specify how steep the line is. We do this using the Dip of the joint. To obtain the dip we have to cut the plane of the joint along the Dip Direction of the joint. Having cut the joint plane the Dip of the joint can be measured by measuring the angle from the horizontal of the plan of the joint. This means that a steeper dip gives a steeper joint up to a maximum of 90 degrees. Typically dip is only measured as a positive angle between 0 and 90 degrees. Dip and Dip Direction are the typical values that are quoted to give the joint orientation. There are however a few other dimensions that are used to specify the orientation of features. Strike is a value used instead of Dip Direction. The Strike is a line at 90 degrees to the Dip Direction. Referring back to our original diagram the Strike follows the contour lines running parallel to the slope. Strike and Dip Direction are therefore interrelated. It is important to note that Strike may not be defined using the conventional 360 degree compass, but may be defined as being an angle East or West of North such as N72E, 72 degrees East of North. Strike can be represented on a plan by a long line following the direction of the strike and a short bar at 90 degrees showing the direction of the dip. Another method of defining Dip and Dip Direction is Trend and Plunge. Trend and plunge tend to be used with linear features such as tunnels, shafts or roads. Trend tends to follow the centreline of these features such as the axis of a tunnel and is defined in the same way as Dip Direction. The plunge is then defined in the same way as the dip so the steeper the plunge the steeper the slope of the tunnel. It is important to understand Dip and Dip Direction when designing rock structures. When using these measurements of the orientation of joints you must clarify how it has been defined by the geologist to ensure that you are applying the measurements in the same manner as they have been defined.]]>Ian TurnerAnalysis2008-11-30T19:48:47+00:00http://homepage.mac.com/splash6/Splash6/files/MonteCarloAnalysisInExcel.html#unique-entry-id-12http://homepage.mac.com/splash6/Splash6/files/MonteCarloAnalysisInExcel.html#unique-entry-id-12Sub MonteCarlo() With Application .Calculation = xlManual End With For Counter = 1 To 500 Sheets("Model").Select Calculate Output1 = Range("L3").Value Output2 = Range("H17").Value Set curCell = Worksheets("Results").Cells(Counter, 2) curCell.Value = Counter Set curCell = Worksheets("Results").Cells(Counter, 3) curCell.Value = Output1 Set curCell = Worksheets("Results").Cells(Counter, 4) curCell.Value = Output2 Next Counter With Application .Calculation = xlAutomatic End With End Sub This Macro runs the Monte-Carlo analysis 500 times. The results from the analysis are taken from cells L3 and H17 from the worksheet Model. They are then put into columns 3 and 4 of the worksheet Results. Post processing of the output data should be done in a separate workbook. If this is not done then re-running the Monte-Carlo analysis will take much longer as the post processing will be done for each step of the Monte-Carlo analysis.]]>Ian TurnerOmniOutliner2008-11-29T08:41:14+00:00http://homepage.mac.com/splash6/Splash6/files/OmnioutlinerAsACalculationSheet.html#unique-entry-id-11http://homepage.mac.com/splash6/Splash6/files/OmnioutlinerAsACalculationSheet.html#unique-entry-id-11]]>Ian TurnerGeomechanics2008-11-29T08:25:36+00:00http://homepage.mac.com/splash6/Splash6/files/ShearBandingInGeomechanics.html#unique-entry-id-10http://homepage.mac.com/splash6/Splash6/files/ShearBandingInGeomechanics.html#unique-entry-id-10]]>Ian TurnerOmnigraffle2008-11-29T08:14:29+00:00http://homepage.mac.com/splash6/Splash6/files/OmnigraffleTemplateForLaticeGirders.html#unique-entry-id-9http://homepage.mac.com/splash6/Splash6/files/OmnigraffleTemplateForLaticeGirders.html#unique-entry-id-9Ian TurnerSketchup2008-11-28T07:19:10+00:00http://homepage.mac.com/splash6/Splash6/files/Version5OfSketchupForMac.html#unique-entry-id-8http://homepage.mac.com/splash6/Splash6/files/Version5OfSketchupForMac.html#unique-entry-id-8Ian TurnerHistory2008-11-28T07:05:55+00:00http://homepage.mac.com/splash6/Splash6/files/HiddenEngineeringGems.html#unique-entry-id-7http://homepage.mac.com/splash6/Splash6/files/HiddenEngineeringGems.html#unique-entry-id-7
Practical Tunnelling Explaining in Detail, the Setting Out of the Works; Shaft-sinking, and Heading Driving; Ranging the Lines, and Levelling Under Ground; Sub-excavating, Timbering; and the Construction of the Brickwork of Tunnels: with the Amount of Labour Required For, and the Cost of the Various Portions of the Work: as Exemplified by the Particulars of Blechingley and Saltwood Tunnels By Frederick Walter Simms]]>Ian TurnerApplescript2008-11-28T06:57:55+00:00http://homepage.mac.com/splash6/Splash6/files/ApplescriptInIwork.html#unique-entry-id-6http://homepage.mac.com/splash6/Splash6/files/ApplescriptInIwork.html#unique-entry-id-6Ian TurnerOmnigraffle2008-11-28T06:38:41+00:00http://homepage.mac.com/splash6/Splash6/files/OmnigraffleTemplateForGeologicalSequences.html#unique-entry-id-5http://homepage.mac.com/splash6/Splash6/files/OmnigraffleTemplateForGeologicalSequences.html#unique-entry-id-5]]>Ian TurnerRock mechanics2008-11-28T06:26:29+00:00http://homepage.mac.com/splash6/Splash6/files/JointSetsInUDEC.html#unique-entry-id-4http://homepage.mac.com/splash6/Splash6/files/JointSetsInUDEC.html#unique-entry-id-4Ian TurneriWork2008-11-27T08:31:47+00:00http://homepage.mac.com/splash6/Splash6/files/ReviewOfIworkNumbersForEngineers.html#unique-entry-id-3http://homepage.mac.com/splash6/Splash6/files/ReviewOfIworkNumbersForEngineers.html#unique-entry-id-3Ian TurnerCocoa2008-11-24T19:59:19+00:00http://homepage.mac.com/splash6/Splash6/files/LearningCocoa.html#unique-entry-id-14http://homepage.mac.com/splash6/Splash6/files/LearningCocoa.html#unique-entry-id-14Become an Xcoder. This really does require no prior knowledge of C, C++ or any other language that most manuals assume the reader has. It gives the reader sufficient knowledge to understand what is happening in all the different sections of a project as well as working with basic classes such as arrays or strings. - The next stage I would recommend is to do Apple's tutorial. To understand fully what is going on in this tutorial you do need some knowledge of the code structures used by Cocoa, but having been through 'Become and Xcoder' you should be ready for this. The one problem with Apples tutorial is that the latest version is based on Leopard and Objective C 2.0. If you don't have leopard, you aren't out of luck, there are still some examples using older versions of Xcode on the internet. This tutorial is useful because it gives you an understanding of some of the non code related issues associated with creating an application. The latest Cocoa tutorial on the Apple Developer site An older version of the Apple currency converter tutorial - The next stage I would suggest is to go to CocoaDevCentral.com and go through the tutorials on the front page. These are some excellent tutorials dealing with some of the other features of Cocoa such as core data and working with graphics. Doing this will give you a fair understanding of how easily accessible some of the features of Cocoa are. CocoaDevCentral - Finally I would recommend looking at a larger project and taking it appart to understand how it works. An excellent example of this is a simple calculator app prepared by Apple. Being such a simple application we all understand what it needs to do, making the methods within the application much more accessible. Having been through all of these tutorials you should be able to understand what almost every line of code in the project does. You can then start adding your own buttons and code to the calculator to try out your own skills. - Now, the world is you oyster. It is now time to start branching out to develop the type of application that you want to do. Once source I would suggest that you have a look at is MacDevNet. It includes two excellent podcasts, CocoaCast for those wanting to do more work on the basics and LateNightCocoa, a well produced series of interviews with Cocoa developers. MacDevNet I hope this might help out a few people who are starting out or struggling with Cocoa. For a beginner it is a very steep learning curve but it will be well worth it in the end.]]>Ian TurnerAnalysis2008-11-22T13:52:54+00:00http://homepage.mac.com/splash6/Splash6/files/SeedingRandomNumbers.html#unique-entry-id-1http://homepage.mac.com/splash6/Splash6/files/SeedingRandomNumbers.html#unique-entry-id-1