Computer technology advancement in Forensic science - Essay Example The system was great for its time. System worked well. The image was not of best quality it worked, better then the old Identity kit. Nothing compares to a good forensic composite artist who can draw the image by hand. However, for those of us who aren't so talented with that medium, the computer and software became our medium and the results were excellent. Computer industry changed. The VISATEX program was in the DOS environment, everything was changing to a graphical environment, Windows. The costs of computers were dropping fast, the programs were cheaper and a lot of those in the industry just couldn't keep up with the changing technology, a financial drain. The "newer" composite programs were using a lot more memory, hard drive space and required better printers. When law enforcement finally caught up to the modern computer world the new composite programs matched the current computers capability. This is where we are today. Several composite programs are offering their composite images in 16 bit, soon to change to 32 bit images. They are now photo quality, some are even in full color! Computer programs are available for sketching crime scenes and blood spatters by inputting certain measurements associated with the scene and the individual spatters. This blood spatter program will then calculate and draw the spatters' points of origin.
Plasma Membrane: Structure and Function
Explain the structure and function of the cell and the plasma membrane to include the division of labour and explanation of transport across the plasma membrane.
All living things are made up of small blocks known as cells. These cells play a big role in the existence of all living things even though we cannot see the cells with our naked eyes. After we have a good look at the functions of a cell and all the organelles found in them we will have an understanding on the big role played by these minute organelles.
Small blocks known as cells make up all living things. The cells that we will be looking at today are the eukaryotic cells. In the eukaryotic cells are tiny cellular structures known as organelles that perform unique specific functions in order to keep the cell alive. To help us better understand and explain what really happens in a cell we can look at a country like the UK. In the UK they are different government departments, organisations and sectors that work together for the good of the country. UK in this case may be likened to a cell and the organisations, departments, sectors will represent the organelles.
In order to separate the inside of a cell from its environment the cell is surrounded by a membrane that acts as a protector for the organelles. All membranes are permeable to regulate the transport of materials in and out of the cell through small pore (Sue Hocking,2008). The largest organelle in the cell is called the nucleus and it is surrounded by a nuclear envelope which is a double layered structure made of two adjacent membranes. The envelope has pores which enable communication between the nucleus and the cytoplasm. The nucleus is the control centre of a cell where all instructions are passed on to other organelles. Just like the parliament of the UK we could agree that it also has a similar duty to pass all legislation of the land and assess all laws to ensure a good and safe life for its citizen. The nucleus contains coded genetic information in the form of DNA molecules which are involved in the synthesis of proteins (Ann Fullick et al.,2015). The DNA detects what the cell is going to do and how it will do it. Inside the nucleus is a dense ,spherical structure known as the nucleolus which is responsible for the production of ribosomes. The nucleolus is like a factory.
Ribosomes according to Gareth Williams (2000),are tiny organelles that are found in large numbers in a cell. They have a diameter of about 20nm. They attach themselves to the endoplasmic reticulum (ER) after leaving the nucleus and this is known as the rough endoplasmic reticulum(RER). There is another type of endoplasmic reticulum without ribosomes known as smooth endoplasmic reticulum, the other ribosomes float freely in the jelly like fluid known as cytoplasm. Enzymes are synthesised in the cytoplasm by the ribosomes. While the main function of the endoplasmic reticulum is producing and packaging proteins. Smooth endoplasmic reticulum produces lipids and steroids. The synthesis of a protein shows the division of labour in a cell. Â Â
We also have some organelles that were first observed by the Italian scientist Camillo Golgi. These organelles are known as golgi, they appear as stacks of flattened sacs. Assembling glycoproteins such as mucin by combining protein and carbohydrates. The golgi also produces digestive enzymes and the formation of lysosomes. Lysosomes are spherical sacs surrounded by a single membrane and they contain some powerful digestive enzymes that help in breaking down materials(Micheal Kent 2000).
Organelles in a Eukaryotic cell
Fig 1 (www.enhantedlearning.com)
As evident in fig 1,we also have the mitochondria organelles which are important in the synthesis of energy in the form of ATP by a process called Respiration. This energy is made available to the cell in molecular structure. Active cells will normally have a lot of mitochondria available. C J Clegg(2000) says the mitochondria are relatively large organelles and has a double membrane, the inner forms many folds called cristae. Entry and exit of all materials is controlled by the outer membrane , as the movement of people is also controlled by the boarders that are in place.
Cell membrane are present in all cells and they facilitate the movement of substances into and out of the cell. It also goes on to provide protection for the cell. According to Ann Fullick(2000) all cell membranes are made up of two main molecules which are the lipids and proteins. These molecules react differently as the head is hyrophilic(water loving) while the tail is hydrophobic (water-hating). Cell membranes are selectively permeable meaning they let in some molecules and keep others out
Below is a diagram of a phosopholipid bilayer in Fig 2
AN IMAGE OF A PHOSOPHOLIPID BILAYER
Fig 2(The Science of Biology,2007)
C J Clegg (2000) says materials that go through the membrane will use the basic types of cellular transport which are available which are passive transportation(no energy needed) and active transport(energy needed). In passive transport we have diffusion(movement of particles from a region of high concentration to a region of low concentration),facilitated diffusion is also movement of particles from high to low area of concentration but this type of diffusion uses a transport protein. Osmosis also falls under the passive transport(special type of diffusion involving water molecules). In this type of transport the cell does not need energy.
The second type of transport is called active transport(cell needs energy ). In active transport energy is needed as the molecules will be moving from an area of low concentration to an area high concentration. Endocytosis is the movement of large particles or fluids through the membrane into the cytoplasm of a cell(Bill Indge,2000). Exocytosis is the movement of particles from inside the cell. Finally we have protein pumps that are integral membrane protein that are capable of transporting protons across membranes.
The cell plays an important role in all living things despite the fact that it is so small and also we have seen that the cell has many organelles which are present to carry out different and unique functions in order to keep the cell alive. Without cells there is no life.
1a) The cell is a eukaryote because the cell has a nucleus that contains DNA.
b) Magnification = Image size Image size = 81mm x 1000 = 81 000Âµm
Actual size Magnification = 4 500
Image = 18mm x 1000 = 18 000Âµm
Actual = 4Âµm Actual Image = 81 000
M = 18 000 4 500
= 4 500 = 18 Âµm
The actual width of the cell is = 18Âµm
c) Magnification = Image size
Image size = 81mm x 1000 = 81 000Âµm
Actual size = 4Âµm
2. Magnification = Image size Image size = 81mm x 1000 = 81 000Âµm
Actual size Actual size = 20Âµm
Magnification = 81 000
= 4 500
Actual size for structure c = Image size
Image size = 15mm x 1000 = 15 000Âµm
Actual size = 15 000
Magnification 4 050 = 3,7Âµm
Ann Fullick, (2000) Heinemann Advanced Science, Biology. 2nd ed, Oxon:Heinemann Educational.
Ann Fullick, Paul Bircher, and Jo Locke. (2015) A Level Biology For OCR, London: Oxford University Press
C J Clegg and D G Mackean, (2000) Advanced Biology Principles and Applictions 2nd ed, London : John Murray
C J Clegg, (2000) Introduction To Advanced Biology. London: John Murray
Gareth Williams, (2000) Advanced Biology For You, London: Stanley Thornes
Sue Hocking, Pete Kennedy, Frank Sochacki.(2008) OCR Biology, Essex: OCR Heinemann
Rapid change in prices of fuel and gas increase the production cost, which directly effect the buying power of consumer. ? Political instability and shortage of gas affecting the organization, production capacity depends upon the availability of gas. â€¢? Heavy duties on import of machinery results in low efficiency. Economical Factors: â€¢? Playing role in economic development by providing hundreds of jobs. â€¢? Loses a huge amount of raw material while mining due to poor economical infrastructure. â€¢? Government does not pay much attention on the development of the industry , which really affects the efficiency of Tiles industry.
In Pakistan demographic factors like income level of people is increasing. â€¢? Construction increase due to increase in population which also results in the increase in demand of tiles in the country. â€¢? Living standard is increasing due to decorative and innovative styles of tiles. Technological Factors: â€¢? Master Tiles use Italian manufacturing plant for producing good quality products at affordable prices. â€¢? Master Tiles use latest technological to produce more innovative products efficiently and effectively. â€¢? Master Tiles is using latest means of communication to communicate with customer to keep them up to date.
The PESTEL Framework Environment: â€¢? To minimize to effect of harmful gases Master Tiles is using environment friendly production plant equipped with latest technology. â€¢? Master Tiles claims that they do not pollute the environment during the manufacturing process of the tiles. â€¢? The wastage is managed in sophisticated manner that it does not pollute the environment. Legal: â€¢? Master Tiles is the first tile manufacturer in Pakistan, which submits the application to National Tariff Commission against the dumping of Chinese tiles manufacturers. â€¢?
It strictly follows Health and Safety Laws, they protect the health of their employees; integrate labour protection into operating structures and processes. Competitors & Market ? Sonex ? National Tiles ? Imported Brands These are the major competitors of Master Tiles in local market but they are far behind because of production capacity and product quality. No doubt tiles industry is growing because of increase in living standards, and Tile market has opportunities to attract new investments and expansion in the running business. Porterâ€™s Five Forces
Threat of New Entrants: Customer Power: The entry barriers in this industry are low, There are few manufacturers of tile in so there is always threat of new entrance. the industry, Tiles are imported here due This industry has a growing potential in to this the bargaining power of future, which makes it an customer is high. Moreover attractive industry to the cheap substitute Degree of Rivalry start business are also available Few manufacturers of tiles, So in the market. degree of Rivalry is not high. There is huge demand for tiles in the market.
Supplier Power: Threats of substitutes: fast growth in the market There are a number of If the prices of raw decrease the level of degree the suppliers in the material increases or the rivalry. industry, Master Tiles tax rates increase people does not dependent on automatically will switch single supplier, so the to marble tiles or chips bargaining power of floors and threats of supplier is low. substitute will increase. SWOT Analysis Strengths: Master Tiles have state of the art production plant. It can produce more that 25000 Sq. / meter per day. They have a big distribution network all over the Pakistan.
Weaknesses: Master tiles is that networking system because there whole internal communication based on networking. The maintenance and repairing of its manufacturing plant. Opportunity: The growing rate of construction, which increases the demand for tiles. Government imposed anti dumping duties on Chinese Tiles, which restrict Chinese manufacturers to export the tiles in Pakistani market with low prices. Threats: Low entry barrier in the industry. Huge amount of tiles supply from unorganized local manufacturers. This is a threat for reduction in market share of Master Tiles. Boston Consulting Group (BCG) Matrix
Threshold Competences Best Quality Ceramic and Granite tiles Provide a number of Series and Sizes of tiles Capabilities for competitive Advantage Threshold Capabilities Unique Resources Tangible: State of the Art Production Plant Intangible: Innovative and Creative Worker Core Competences Texture Designs Strategic Business Units (SBU) A strategic business unit (SBU) is a part of an organization for which there is a distinct external market for goods or services that is different from another SBU. Currently Master Tiles is operating with two SBUâ€™s on the basis of Capability based Criteria, we can identity those as distribution channels.
The following diagram illustrate the concept: Distributor Retailer Customers Master Tiles Retailer Customers Strategy Clock Strategic Clock Price Based Strategy (Rout 1,2): Ceramic Tile Series Wall/Floor: Special (SP) (8*10) (8*12) is sing low price strategy because its perceived benefits are low. The Hybrid Strategy (Rout 4): Following tiles are being introduced with the hybrid strategies because these products provide some benefits with low price as compared to competitors ? Granite Floor Tile Series: SPM-110 (16*16) ? Ceramic Wall Tile Series Glossy/Matt: EBL (10*13) ?
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