Types and sources of data

 Data may be obtain from various sources.It's difficult to specify all sources of data.However,in general,it is classified into two groups :
I.e.
a)primary sources
b)secondary sources
a)primary sources
      The source of data which is gathered by direct observation of researcher is called primary sources of data collection.these data are original and is the first hand data.
These data are achieved by eyewithness. These are reported by an actual observer or participants in an event.these data have not been precisely collected or assembled for any other known project. Primary data are those data can be collected through interviews, observation or experiments.
b)secondary sources:
    Secondary sources are those,which is already gather by others.in these sources the researcher is not eyewitness.The first hand information is collection by someone else for some other purpose.the sources of secondary data can be divided into two groups. I.e
1) External
2)internal
 If any research is carried out by any company or organization, then certain data can be achieved from within the company.In other case the company itself is a source and is referred to as internal sources. Those data include staff record,financial record,internally generated research outcome .External source are the sources outside the company.such source include books,periodicals,published, reports and computer data bank.

Tacheometry

Tacheometry is a branch of survey in which height and distance are determined  from the instrumental reading alone ,these reading are usually taken with a  specially adopted theodolite khown as tachometer.
 Chaining operation is eliminited and tacheometry is very useful in broken terrain .eg . river valley over standing crops e.t.c.

Propose of tacheometric surveying :

1) preparation of typographical map,vertical and horizontal control can be done at same time.
2) In survey of higher accuracy ,it provides check on the distance measured by  tape 
3) For surveys up to the error 1/1000 is accepted
4)It is considered to be rapid and widely used by engineers in location survey for railways, canals reservoirs etc.

Field works on tacheometry

The tacheometric survey involves two steps:
1.Running a traverse enclosing the area.
2.Locating details and contours from the traverse station .

Procedure

1) Measure the bearing of first line.
2)set up the instrument over the first station ,centering and level it accurately.
3)Measure heigh of instrument 
4)Determine the Rl of first station by observing the staff on the BM or TBM
5)Locate the detail points around the station by:
    a)horizontal angle between the reference          station and the point
    b)vertical angle 
    c)staff reading of the stadia hairs
6) Take the foresight on the second station by observing 
  a)Traverse angle
 b) vertical angle 
c) staff reading
7) transfer the instrument to the second stations
8) Center and level it accurately and measure height of the instrument (HI).
9) Sight the first station and observed 
a)Traverse angle
b) The vertical angle
c)staff reading
10)compute the traverse leg between two stations and their diffence in elevation from the observation made from both station .If required accuracy is achieved then the average should be accepted .if not,repeat the observation at both station
11) locate the detail points.
12) shift the instrument to another station and repeat the same procedures.

Moment area theorem

 The moment area theorem is based on the following two theorems:

Theorem 1:

  The change in slope of the tangent of elastic curve between two points in straight member is equal to the area under M/EI diagram between two points.

 Theorem 2:

  The deflection at any point in a beam in the direction perpendicular to its original tangent to the elastic curve at another point is given by the moment of M/EI diagram about the point where deflection is required.




BASIC PRINCIPLES OF URBANIZATION

DEFINITION
PLANNING
Any type of design activities which include pre-thinking and pre-arrangement before any physical
developments take place needs to: a) analyze the requirement of good city or town and b) synthesize them
as a result to get planned city or town.
Planning is a systematic management overtime to make everything in order and easy to implement, which
should be durable, convenient, beautiful and efficient. Planning at urban scale includes the land zoning,
transportation, infrastructure and built environment. It combines design community, social economicaL
physical and political issues which effect and impact on human living environment built environment for
the present and future.
Planning is basically carried out so as to achieve and acquire better results in terms of health, convenience,
comfort and happiness of all living beings. From the effective planning the possible errors can be eliminated
in future.
Planning can be equally carried out in the new town and city on virgin land for the creation of the better
environment whereas the planning on existing towns, cities and the extensions can be planned for the
development and improvement for the betterment of the existing wwns. Hence, the practice of Urban
Planning has indeed the great demand for the betterment of the city. Most of the developed countries had
been following the method for the better environment by the effective planning.
URBAN ZONE AND URBANIZATION
Urban means area generated independently movement of the people from one place to the other which is
gradually reducing the rural character. Urbanization is focused on concentrated or denser setting of areas
for the varieties of activities, services, facilities etc. In other words, it is trade based economy where as rural
area signifies the primary production area and human activities.
REGIONAL PLANNING
It is an attempt to bring about balanced development of the region by promoting growth in the backward
region . Examples in Nepal are Eastern Development Region, Central Development Region etc. It includes
planning of land in general but extends to planning of government, economic activities, and socio-
economic activities in the context of socio-cultural practice.
URBAN PLANNING
It is the study and application of urban design and development with response to social aesthetic and
environmental issues, which has provision of required facilities to the people living in urban areas to
achieve the goals considering the socio-cultural values and physical structures of the surrounding from the
past experience, exercises and maintaining the future. E.g Kathmandu valley, Chandhigardh city etc.
Urban structure is composite of settlements, neighborhoods, community, different types of buildings,
landscape; open spaces, transport network, infrastructure services, and economic activities interlinked each
other. The urban form is the composition of size of the urban area, its geography and its land use.
CITY
The core space of the urban area is city. It is specialized in trading activities which is complex network of
interrelated elements. Population growth is main factor for the expansion of the city and people shift towards
the countrys ide due to environmental degradation. Examples in our case are Kathmandu metropolitan city,
Patan sub-metropo litan city, Bhaktapur sub-metropolitan city, Chitawan city etc.
TOWN
It is smaller area than city, more widely specialized centres for specific purpose that serves a particular area
and acts as a local centre. It includes the commerce, industry, culture, education, health, recreation,
administration etc. and are influenced from economic; social and political situation
RURAL PLANNING
It deals with the planning of any rural region, so as to get the better environment. Examples – arrangement
of crop fields, haat bazaar, health posts, community centre, security posts etc.
TOWN PLANNING
Urban environment deals with the environment in which the natural features dominates and replaced
by the man made physical structures. For example: building constructed as residence for living, office for
working likewise recreational centre for entertainment and refreshment. As per the data a place becomes
urban if it has more than 5000 population . Similarly. more than 75% of the total population should be
engaged in non-agricultural occupation and density more than 1000 persons per sq. km. however there can
be exceptions
Town planning is considered as an art of shaping, remodeling and guiding the physical growth of
the town. Planning also helps to prevent the haphazard growth creating livelihood of building environment
and other physical infrastructures to meet the various needs such as social cultural ,economical facilities to
provide the safe and healthy conditions for all type of people to live, work and play.
As Aristotle says, ‘A city should be build to give its inhabitants security and happiness’ while Plato
describes it as a place where man had a common life for noble end.
Urban planning is concerned with the ordering and design of settlements. from the smallest towns to
the world's largest cities. Urban, city, or town planning is the discipline of land use planning which
explores several aspects of the built and social environments of municipalities and communities. Other
professions deal in more detail with a smaller scale of development namely architecture, landscape
architecture and urban design. Regional planning deals with a still larger environment, at a less detailed
level.
 Another key role of urban planning is urban renewal and re-generation of inner cities by adapting
urban planning methods to existing cities suffering from long-term infrastructura l decay.

Structure mechanics 

  Structure mechanics is the branch of mechanics that deals with force and motion of structures systems. It's the computation of deformation,deflection and internal force of stresses within structure for the evaluation of existing structures.
 Approaches of structural analysis the two basis approaches of structural analysis are as follows:
(a)Force method
(b)Displacement method
(a)Force method
          In this method the number of independent unknown forces is found and is compared with the number of independent equation of static equilibrium that can be written involving these unknown force. If the number of unknown is equal to number of independent equation the unknown forces can be directly determined. But if the number of unknown forces in excess to the equilibrium equations are designed  as redundant forces and are assumed to be removed as restraints to obtain a statically determinate resudual structure called primary structure.
(b)Displacement method
       In this method the independent unknown displacement components involved in the structure are estimated and these are considered as the unknown to be found. The inertial force in the structure are than expressed in terms of these unknown displacement using the stress displacement relations.for each unknown displacement components a corresponding equilibrium is written in terms of known external forces and unknown inertial forces which are expressed in terms of the displacement.these equations are solved to find the unknown displacement.

Weir ventilation

    When water flowing over a rectangular weir with no end contraction i.e.suppressed weir,the nappe touches the side wall of channel due to which air is trapped in the space between side wall falling nappe,weir and bottom of the channel.this air is carried by the flowing water there by reducing the pressure below the nappe which may become negative or below atmospheric pressure.
  # Further withdrawal of air increase the vacuum pressure causing the discharge will be (20-30)% more than that given by formula .
  #Hence for the calculation of discharge through a weir with no end contraction the pressure below the lower nappe should be equal to atmospheric pressure,so that there will be no extra withdrawal of water and discharge is obtained by using the formula.this in other to apply the formula and obtained the discharge through a suppressed weir atmospheric pressure has to be maintained. For this holes are made through the channel walls at the place just below the nappe and connected with the pipe to a atmosphere.this process is called weir ventilation.
 Bases for Development of Architecture:
HIstory shows that following are the bases for the development of Architecture.
1. FEAR:-From primitive times the man has been trying to protect himself from the attacks of wild
animals and rigorous of wealth. For this he created his dwelling which kept on changing with time
and need. With advancement in his intelligence desires for safety, comfort and luxury increased
which resulted in varied structures for various purposes.
2. LOVE:-Instinct of love gave birth to many monumental works e.g:Taj Mahal (Delh i. india), Rani
Mahal (Palpa, Nepal) etc.
 3.DEATH:- Death also has been responsible for many architectural constructions. So many historical
Tombs and Makbaras are the examples of these category monuments.
3. HOPE:-Pyramids, temples, churches and other places of worship, religious buiiding have come up
out of shear hopes of the man.
1.3 Factor influencing Architecture
The reason to construct a building in particular form or shape are called influences. Following factors
influence the architecture.
 Topography: Topography means the general terrian of the surface. A small country having uniform
topography will generally have similarity of character in its architecture. On the contrary, a very
large country having varied topography and culture in different regions will have varied character in
its architecture, A mountainous. region requires an architectural treatment entirely· different from
that in a level terrian. In mountainous region building plans are adopted without much consideration
to secure a picturesque effect.
 Building materials: Avialable building materials in the area also influence the architeture of the
building. If timber is locally available in abundance and is cheap it will be found that most of
constructions will be using timber as building material. Easy availability of bamboos will lead to
the construction of bamboo houses · Locally available stone is used as building material in most of
the constructions. Size of available building material also leads to varied styles of building
construction. Larger blocks of building material lead to post and lintel, construction. Post and lintel
construction is also know n as "Trabeated construction''
 Climate of the region influences the architecture significantly
 lnfluence on plans: In warmer climates the plans are more open and often include a court yard.
Milder climates propagate construction of detached buildings. In cold climates Plans are more
compact as every effort is made to avoid wintry winds and snow from entering the building.