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Monday, November 30, 2009

Units and Drawing Scale in Archicad

Archicad is a very powerful Building Information Modeling (BIM) Software from Graphisoft. It is increasingly being used by architects around the world. In this article I am going to explain a little about how to set units and scale prior to designing a house or a building.
If you are an Architect who lives in India, you will use SI units as project preferences for your design. But if you live in the United States, you might prefer to keep the default settings which are in Imperial Units. As a new Archicad user, you might be confused about how to change the units from the Imperial System to the International System. If this is your case, don't worry. Take a look at my following explanation:
With the Archicad BIM software running on your computer screen, locate the Option menu. After you have found and clicked it, you will see such list as Element Attributes, Element Snap, Auto Intersection, Magic Want Settings, Add-on Manager, Project Preferences and Work Environment.
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Click the Project Preferences, you will see Working Units and Levels, Dimensions, Calculation Units, Construction Elements, Zones, Layout, Miscellaneous. Click Each of them to set your desired units of measurements.
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After setting the SI units, you can continue to setting the drawing scale. It is very easy. Click the Document menu and then the Floor Plan Scale… You can change the scale of the drawing which is suitable for your design project and the printer or plotter size.
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Saturday, November 28, 2009

Archicad and Home Design

The following articles discuss Archicad tutorials and home design for architects and interior designers. At the moment the latest release from Graphisoft is Archicad 13. It is introduced with Graphisoft BIM Server to support model based team collaboration. As the number of users of this home modeling software is going up, there is a need or demand for information on how to use it. What I provide below are not meant to replace the official explanation presented by Graphisoft - the official company which has created the Archicad rather they are my personal journals which contain stories of how I study this great software.
I hope that by sharing some of the following articles, new Archicad users especially on the introductory level may find them useful for their own personal studies. I am not sure if I am able to provide more step by step Archicad tutorials in the future.
I write about anything in this blog from earthquake resistant wooden house to how to protect our tropical rainforest which is facing rapid deforestation. So, when you come again in this blog and find out that there are no new articles about Archicad then I suggest that you visit the official website of graphisoft.com There, you will find various information that is more suitable to your needs.
If after reading the following posts, you find that there are some mistakes, then please use the comment form to write some of your opinions which are very important for the corrections or improvements of these tutorials.
Before I finish this post, I would like to recommend other similar products created by Autodesk which many architects from around the world use in their home or building design projects. They are Revit Architecture, Revit MEP and REVIT Structure. Because the three BIM softwares are made by one company, they are more compatible for one another. As every software has its advantages and disadvantages, every new user of REVIT or Archicad must consult his or her needs with experienced users of each of the software to assess the right solution for his or her design needs.
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Archicad and revit for house design

Wednesday, November 25, 2009

The Maritime Engineering Reference Book


A Guide to Ship Design, Construction and Operation. When I read it for the first time, I remember the volumes of the Principles of Naval Architecture which were published by the Society of Naval Architects and Marine Engineers.(SNAME). Although it has just been released in 2008 by Elsevier, most naval architects will feel that they are quite familiar with the content of this book. As a matter of fact, it is a compilation of various naval architecture books printed by the same publisher.
For instances, the Chapter 2 which discusses the various types of marine vehicle is similar to Chapter 17 on Ship Types of the Introduction to Naval Architecture written by E.C. Tupper. The Chapter 3 Flotation and stability of the book is also the same as Chapter 5 Flotation and initial stability of the above mentioned book. For Chapter 4 the Ship Structures, it is taken from Chapter 6 The Ship Girder of volume 1 of Basic Ship Theory.
If you are a practicing naval architect, you will find that Chapter 6 on Marine Engines and Auxiliary Machinery is an interesting part of the book because it might be new subject for you. This chapter is actually a subject which is more suitable for marine engineers. Yet, naval architects who work in the design office or at shipyard will need to read it because they will always deal with such problems as propulsion systems, diesel engine performance, main engines, auxiliary machinery and equipment, instrumentation and control in their every day practical jobs. Whether you are a ship designer or a naval architect who works at dockyard, you will find that this book is very suitable for you. It does not have examples and exercises which you can study to understand each subject comprehensively but it discusses all the subjects that naval architects and marine engineers must know. Chapter 10 which deals with Underwater Vehicles is mostly about ROV or Remotely Operated Vehicles. There are not any discussions about how to design, construct and operate submarines.

Monday, November 23, 2009

A naval architect from Indonesia

She is a fresh graduate from naval architecture department of Hasanuddin University. She studied ship theory, ship construction and ship design. The most memorable experience was when she had to calculate the longitudinal and vertical centers of gravity of a ship (LCG and VCG). It was a semester assignment and not many naval architecture students passed easily. She was one of the few who could do and pass the subject in first attempt. Although naval architecture is an interesting field of engineering, it seems that now she is more interested in art particularly dancing. Nadia Siregar, an Indonesian girl, began learning Papuan traditional dance in 1993 when she was still at grade 3 of elementary school. She likes dancing because she sees that Papua island has many tribes and every tribe has its own unique cultural characteristics. "They are very interesting but I only want to focus on the traditional dance," she said.
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National and International Performance - Nadia is now a member of IRIANTOS Dance Group. Its chairman is George Wellem Yomaki. Their dance group has 30 members. Together with this group, Nadia has traveled across the country and even abroad to perform various Papuan dances. Some of the festivals where she and her friends performed were: Papuan Art Festival in Biak island in 2002; Multicultural Festival in Australia from 14-18 February 2004; Dance performance in Korror city of Palau islands in 2004; T heater Performance on the Exiled and Virtual Body in Makassar city from 10 to 11 August 2007; Monolog Performance of Makkunrai Project at the Societet de Harmoni building of Makassar city celebrating Kartini Day on 1 May 2008; Nusantara Cultural Carnival in Jembrana Bali in September 2008; President and Vice President of Indonesia's Campaign Declaration at the Monument of Proclamation in February 2009; Festival of Folk Theater Media on national level in Malang city of East Java, 30-31 May 2009; Nusantara Cultural Festival at the State Palace of Jakarta on 18 August 2009.

Tuesday, November 17, 2009

Basic Ship Theory

Basic Ship Theory were published in two volumes. The first deals with Hydrostatics and Strength of Ship whereas the second deals with Ship Dynamics and Design.
I have been reading the books since 1993 or 1994. They are easy to understand reference both for students and practicing naval architects.

Contents of volume 1:
1 Art or science? 1.1 Authorities
2 Some tools 2.1 Basic geometric concepts; 2.2 Properties of irregular shapes; 2.3 Approximate integration; 2.4 Computers; 2.5 Appriximate formulae and rules; 2.6 Statistics; 2.7 Worked examples; 2.8 Problems
3 Flotation and trim; 3.1 Flotation; 3.2 Hydrostatic data; 3.3 Worked examples; 3.4 Problems
4 Stability; 4.1 Initial stability; 4.2 Complete stability; 4.3 Dynamical stability; 4.4 Stability assessment; 4.5 Problems
5 Hazards and protection 5.1 Flooding and collision; 5.2 Safety of life at sea; 5.3 Other hazards; 5.4 Abnormal waves; 5.5 Environmental pollution; 5.6 Problems;
6 The ship girder 6.1 The standard calculation; 6.2 Material considerations; 6.3 Conclusions ; 6.4 Problems;
7 Structural design and analysis; 7.1 Stiffened plating;7.2 Panels of plating; 7.3 Frameworks; 7.4 Finite element techniques; 7.5 Realistic assessment of structral elements; 7.6 Fittings; 7.7 Problems;
8 Launching and docking; 8.1 Launching; 8.2 Docking; 8.3 Problems;
9 The ship environment and human factors 9.1 The external environment. The sea; 9.2 Waves
9.3 Climate;9.4 Physical limitations;9.5 The internal environment; 9.6 Motions; 9.7 The air
9.8 Lighting; 9.9 Vibration and noise; 9.10 Human factors; 9.11 Problems;
Bibliography
Answers to problems
Index
Contents of Volume 2
Powering of Ships: General Principles; Powering of Ships: application; Seekeeping; Maneuverability; Major ship design features; Ship design; Particular ship types
The thickness of volume 1 is 400 pages. For volume 2, it has 373 pages. The books are now published in a combined volume by the publisher to lower the price so that it can be sold or bought easily.
I like these books very much because they have many worked examples which can be solved through manual calculation or using computer spreadsheet software.
For volume 1 which deals with Ship Hydrostatics the use of computer spreadsheet software such as Microsoft Excel is highly recommended. To further your investigation on this subject, I should recommend another important book entitled Statics and Dynamics of the Ship published by Mir, now Pacific Publisher, whose authors are V Semyonov, Tyan, Shansky.
I remembered seeing, the first time, the two volumes of these Basic Ship Theory books in 1993 or 1994 in the library of Pattimura University of Maluku islands Indonesia. They were red labeled meaning that they could only be read in the room and were not available for renting.
I had to approach a staff of the library to request permission from him for photocopying them. During that years, internet was not available in my campus and the students did not know how or where to order the Basic Ship Theory books.
After long conversation and some arguments, I was then allowed to take the books out of campus to photocopy them in the downtown of Ambon city. That's what most university students in Indonesia did to be able to read the books. Why we photocopy them? The price of these two books equals to one month salary of middle level government employee in this country. So, a father must stop feeding the whole members of the family to set aside the money for his son or daughter to buy them.
I hope now that it is more affordable to students all around the world. Perhaps Longman as the publisher of Basic Ship Theory has provided the e-book or international edition versions to make the price cheaper.

Monday, November 16, 2009

Naval Architecture Books

While I was still studying naval architecture in Ambon city of the Maluku islands of Indonesia, I photocopied a number of ship theory books from the library of our faculty. These books might not be available anymore because they were published between 1950s and 1970s. If they are still being published. their contents might have been edited to adapt with the latest improvement in shipbuilding technology. Because most of our lecturers studied naval architecture and marine engineering in Russia during 1960s, the books that they used to teach us were written by Russian naval scientists. I still remember their titles. For ship theory, we used Statics and Dynamics of the Ships.
Here are naval architecture books that I have at this moment.
Introduction to Naval Architecture; E.C. Tupper- Elsevier; 2004
Ship Stability for Masters and Mates fifth edition; Captain D.R. Derrett, Revised by Dr.C.B. Barrass - Butterworth Heinemann; 1999
Maritime Engineering Reference Books
  • Volume 1 Hydrostatics and Strength; KJ Rawson; EC Tupper 2001 - Butterworth Heinemann
  • Volume 2 Ship Dynamics and Design; KJ Rawson; EC Tupper 2001 - Butterworth Heinemann
Basic Principles of Ship Propulsion - MAN Diesel A/S, Frederikshavn, Denmark
Boatowner's Illustrated Electrical Handbook
Controllable Pitch Propeller - MAN Diesel A/S, Frederikshavn, Denmark
Fishing Boat Construction: 2 Building a fiberglass fishing boat
A conceptual design of a fiber reinforced plastic fishing boat for traditional fisheries in malaysia
Fuel and Financial Savings for operators of small fishing vessels
Guide to Ship Repair Estimates (in Man Hours); Don Butler - Butterworth Heinemann; 2000
Added Masses of Ship Structures by Alexandr I Korotkin - Springer
Man on the Ocean; R.M. Ballantyne (edisi html)
Marine Design - Rhinoceros Advanced Training Series; 2003
Marine Structural Design; Yong Bai - Elsevier; 2003
Ship Design and Construction; written by a group of authorities - editor Robert Taggart - SNAME; 1980
Ship Design for Efficiency and Economy second edition; H. Sneekluth and V. Bertram - Butterworth Heinemann; 1998
Ship Handling Theory and Practice; D.J. House - Elsevier Butterworth Heinemann; 2007
Shipbuilding Technology; V.K. Dormidontov and friends, translated by J.H. Dixon - Mir Publisher 1966
Ship Hydrostatic and Stability; A.B. Biran - Butterworth Heinemann; 2003
Ships and Science - The Birth of Naval Architecture in the Scientific Revolution, 1600-1800; Larrie D. Ferreiro; The MIT Press; 2007
Fishing Boat Design: 2 V-bottom boats of planked plywood construction; FAO Rome 2004
You may ask where to get these books. If you want to buy them, you can go to Amazon.com but there are many of them which you can download from avaxhome.ws
Rules for ship and boat construction which can be downloaded from American Bureau of Shipping website
ABS Guide for Building and Classing Offshore Racing Yacht 1994
ABS Rules for Building and Classing Reinforced Plastic Vessels 1978
ABS Rules for Building and Classing Steel Vessels 2009; Part 3 Hull Construction and Equipment

Sunday, November 1, 2009

The Environmental Impact of Marine Tourism

Sunbathing, snorkeling, scuba diving, wave surfing and water skiing are some of the activities that tourists typically enjoy when they go to the beach. These activities can bring positive and negative impacts to marine environment. To reduce negative impacts of tourism activities on the environments, people who work in this industry need adequate knowledge about conservation and coastal management.
Marine tourism is a business that generates big revenues during holidays and special occasions. Being a part of the tourism industry is a great way to make money because life seems like one endless holiday. Yes, it does have its downs like any other business, but for the most part, the going is good especially if you are well-established and your customers come back to give you repeat business. Marine tourism has come into its own with the advances that have been made in the field of technology. Locations that were earlier inaccessible or unsafe are now well-known tourist spots in marine environments. The seas and the coastlines of the world are much sought after destinations for tourists all over the world, and this makes marine tourism a booming industry.
But all this interest in water sports, cruises, underwater explorations and other activities that involve the marine environment are definitely having an adverse effect on marine ecosystems and animal species that live on or near the coast.

• Natural habitats are destroyed when hotels, restaurants and other entertainment and hospitality facilities are built along the coastline.
• Surrounding areas are also destroyed in order to provide access to these facilities. With the advent of roads, airports and sea ports, people begin to populate the area and drive out the natural wildlife whose habitat the area was originally.
• The level of pollution increases with the increase in population
• Essential resources like water become critical and are sometimes in shortage.
• The coastline is destroyed due to erosion and the sea also becomes polluted with effluents from hotels and other establishments in the area.
• Cruise ships produce and dump waste in mid ocean, leading to pollution in the high seas too.
• Sewage causes algae to form over coral reefs and damages and destroys them.
With all these detrimental effects, we must adopt techniques to manage the pollution and the destruction of ecosystems, not just because we need to save the environment, but because we need to save the tourism industry itself. The environment and its quality are very important if tourism is to survive and thrive; with polluted beaches and diminishing wildlife, the tourists are going to be few and far between. And when this happens, it is the end of marine tourism as we know it.
For man and nature to coexist in peace and thrive, it is up to us to ensure that we do not wreak havoc on the environment; for if we do, it will come back to haunt us in the form of global warming and climate change.
By-line:
This guest article was written by Adrienne Carlson, who regularly writes on the topic of construction management degrees . Adrienne welcomes your comments and questions at her email address: adrienne.carlson83@yahoo.com