This Idea Of Sustainable Urban Planning Environmental Sciences Essay

This Idea Of Sustainable Urban Planning Environmental Sciences Essay The idea of urban planning and policy is to create and help define place within an urban environment. In doing so urban policy can help to construct and craft urban identity via the mechanisms of spatial construct, and the manipulation of activities within that space. Today urban policy making is tasked with providing new mechanisms that enable citizens, planners and policymakers to explore the ways in which we can plan and develop communities that meet the long-term human and environmental needs of our society [Wheeler and Beatly2004, pp 1]. This is the idea of delivering a sustainable city i.e an urban environment that is capable of meeting todays needs without compromising the ability of future generations to meet their needs [WCED1987 in Williams et al 2000, pp 3]. Achieving this idea of sustainability in urban planning and policy is not easy. The very idea of sustainability encompasses a broad and extensive range of inter-related issues that continues to challenge ingrained att itudes regarding relationships between culture, nature and governance [Mather 2005 pp 280]. Ebenezer Howards Garden City vision ideal offered a look at how sustainable urban policy may be realized and continues to offer important lessons for our contemporary policy decisions. Garden Cities of Tomorrow: This idea of sustainable urban planning is not a new subject, but is of growing importance in todays society on a global scale. In 1898 Ebenezer Howards Garden Cities of Tomorrow redefined urban planning by offering the first real insight into the ideas of sustainable urban planning and development. One of the single most influential and visionary books in the history of urban planning the Garden City vision outlined a strategy for addressing the problems of the industrial city in a more detailed fashion than had ever been attempted before. So influential was this work that two English garden cities were actually built in the early twentieth century, namely Letchworth and Welwyn, and the concept inspired the British New Town Programme that constructed eleven satellite cities around London between 1940s and 1960s [Wheeler and Beatly 2004, pp 11]. The book was seen as a revolutionary breakthrough in how planning is considered in an urban context, as it was the first set of ideas that r eally attempted to balance urban and rural developments. The Garden City concept still offers a vision that can be used to evaluate contemporary urban policy in its attempt to deliver modern sustainable cities on a worldwide scale [Wheeler and Beatly 2004, pp 11]. The Origins of the Garden City: The industrial revolution brought about rapid growth for urban areas, and with this growth a set of new problems for our town and country planners. As more and more people were drawn to urban centres in search of work and a better standard of living, the rapid expansion of our urban populations placed great strain on the infrastructure, housing and resources of our cities, which quickly became overcrowded, unsanitary, expensive and highly polluted and poorly serviced. Coupled with this was the continued fall in wages of our agricultural workforce that prohibited new building and development in our rural areas. These conditions precipitated a devastating cycle of urban migration that simply couldnt be controlled, and many people were faced with making the unfulfilling choice between living in a culturally isolated rural area or giving up nature to live in a city [Nair 2009]. As the industrial revolution continued unplanned, congested, polluted slums jammed with a newly impoverished ur ban proletariat began to characterise and dominate the landscape of nineteenth century industrial cities [LeGates and Stout 2007, pp 12]. As cities continued to expand in this fashion, so negative images began to be associated with our urban centres and the suburbs became characterised as a sprawling cancer of bricks spreading out across the British landscape [Jones and Evans 2008, pp 141]. Patterns of Modern Urban Growth: These patterns of growth seen in the UK during the industrial revolution mirror those that we are seeing in countries across the world as the developing nations begin to emerge on worldwide markets. The worlds urban population has more than doubled since 1950 and a recent about the growth of urban populations from the United Nations Population Division notes that half of the worlds population now lives in urban areas, and within the next 30 years, nearly two-thirds of the worlds population will live in urban areas [Rodrigue 2005, Vlahov et al 2007, pp 16]. These patterns of growth precipitate the same problems seen during the industrial revolution in the UK as rapid urbanisation continues to place too great a strain on urban resources. In the developing world, where most of the global urbanisation is to be observed, a large segment of that growth is into slums concentrated areas of disadvantage [Vlahov et al 2007, pp18]. These areas are characterized by lack of basic services, inade quate and often dangerous living environments, overcrowding, and poor sanitation. Urban policy needs to start considering how to turn these patterns of urban growth into something that can become sustainable for both our environment, and ensure that the needs of our society are met. Design of the Garden City: In What Ways is it Sustainable? Many have identified Garden Cities as examples of sustainable cities that can continue to offer key lessons for modern urban policy. In order for a city to be considered as a sustainable urban development its principle aims must be to create a user-friendly and resourceful area, not only in terms of its form and energy efficiency, but also its function as a place for living [Elkin et al 1991, pp 12]. Sustainable urban development also requires the achievement of urban development aspirations concerning inter and intra-generational equity via a stock of natural resources that should not be depleted beyond its regenerative capacity [Breheny 1992, pp 1]. From these ideas Smith et al 1998 established a list of sustainable urban principles which included Living off environmental interest rather than capital Acknowledging the idea of environmental thresholds and living within these Developing a sense of equity and social justice Forming inclusive procedures for decision making Howard saw the extreme overcrowding of early industrial cities with its accompanying problems of sanitation, services, pollution and public health as a growing issue of urban design. His Garden City concept was a response to this, with planned communities aimed at relieving both the overcrowding of cities and deprivation in the countryside. Founded with Letchworth, then Hampstead, Bourneville and Port Sunlight, the Garden City was an attempt to create a modern utopia in urban design [Campbell 2010]. Howard believed that creating new balance between city and country in which populations were decentralized into carefully planned new communities in the countryside would help to create a more sustainable urban landscape [Wheeler and Beatly 2004, pp 7]. The Howard vision was for Garden Cities to become self-contained co-operative settlements sustainable urban centres that could create networks of self sufficiency by creating a symbiotic relationship between urban and rural development. Garden Cities were to be defined by a radial planning style, with pre-defined zonation for public parks, private lawns, new forests and agricultural holdings. Commercial, residential and public use areas were to be clearly defined (as shown in figure 1) and wide arching roads and the idea of a radial rail network were incorporated to ease the burden on infrastructural requirements of urban areas. These urban developments were to become more than just a place to house a growing populous. They were to d esigned to be viable economic communities where industry, public buildings and housing would be carefully planned to create an environment on a human scale, where the built environment would be balanced with the natural [architecture.com]. Figure 1: Howards outline for an ideal Garden City [From Garden Cities of Tomorrow Howard 1902 Source: RIBA British Architectural Library]. When evaluating the design on this Garden City vision in relation to todays urban policy framework, it is clear where the ideas of sustainability are found. Howards vision incorporates vast areas of green space both landscaped for recreational use, and set aside for agricultural practices. Green spaces like these can be seen as both a social advantage but they are also invaluable carbon sinks in moving towards sustainable urban policy. Surrounded farmland creates an automatic market for local agriculture, which can be significantly more sustainable than conventional agriculture given its low transport emissions [Campbell 2010]. Pedestrian friendly cities, encouraging an increased focus on social conditions and a respect for our natural environment is a fairly modern approach to sustainable urban planning. Howards objective, in short was to raise the standard of health and comfort of all true workers of whatever grade the means by which these objects are to be achieved being a healt hy, natural, and economic combination of town and country life, and this on land owned by the municipality. His ideas received worldwide acclaim, with developments created in the UK, South Africa, the USA, and in Germany where the steel company Krupp, concerned about the low morals of badly housed workers, built the garden village of Margrethenhohe [Girardet 1996, pp 54]. Sustainable Development in Modern Urban Planning and Policy: The broad aims of sustainable development are now central to urban planning and public policy [Batty 2006, pp 29]. For the first 70 years on the twentieth century the designs and master plans for our modernist cities were focused on new development. Urban planning was focused on starting fresh building new cities stripped of the chaos of the nineteenth century city and the dull provincialism associated with Howards Garden City [Haughton and Hunter 2004, pp 105]. The Garden Cities were defined by their spatial zoning patterns with different areas designated different land uses (as shown in Figure 1). Current patterns of urban planning appear to be moving away from this approach as it became more considered that the most effective solution to achieving sustainable urban form was the implementation of the compact city idea. The compact city advocates the use of high-density mixed use urban form. Many planners preferential use of this urban form is attributed to the perceived advantage s of mix-use planning such as conservation of green-belt areas, reduction in commuter distances and the associated effects of reduced emissions, more efficient infrastructure and utility provision, and the revitalisation and regeneration of inner urban areas [Williams et al 2000, pp 19]. In essence many urban planners adopt and create mixed use developments in order to better achieve a long terms economic stability and to add to an areas vitality and vibrancy that could perhaps not be achieved with single use spatially defined development. There are obvious advantages to this approach when evaluated against the Garden City idea. Firstly there is a better use of brownfield development preserving Greenfield sites and protecting these areas from the threat of urban development. As a result of the growing importance of a sustainable approach to urban policy, brownfield sites have quickly become the key strategic target for meeting housing and development needs across our urban regions by re-using previously developed land. This was further emphasised by Planning and Policy Guidance Note 3 (2000), which set a target for local authorities of building 60% of new housing on brownfield sites [Jones and Evans 2008, pp 5]. Many urban policy makers would consider that new communities based on Greenfield development, show little regard to the long-term environmental impacts. The impacts of losing that land to urban development, as well sourcing materials, maintaining buildings, the environmental impact of the building itself, infr astructural developments is not really thoroughly built into the costs to our natural environment. In the wider view, however, the question of urban form is much more than simple density and brown/green choices it is about the spatial structure of human activities [Williams et al 2000, pp 255]. Garden Cities Lessons for Future Urban Policies: The Garden City style was cautious, pragmatic and designed to appear reasonable to the average citizen [Wheeler and Beatley 2004, pp 12]. Though Howards search for a balance between city and country life is still central to sustainable communities, the emphasis has shifted in many developed nations. Instead of the extreme dense nineteenth century city with a frequent shortage of decent housing, clean water, and basic sanitation, we now have relatively low-density, automobile-dependent suburbs with a much higher quality of housing and infrastructure but with many other problems [Howard and Beatly 2004, pp 12]. Even in developing countries the pragmatic application of the Garden City idea needs to be called into question. Howards garden settlements were based on the development of very low density housing. In his work Howard cites that the ideal population size for his new Garden Cities was to be 32,000 on a site of 6000 acres of available cheap rural land. Of this acreage 1000 acres w ould be reserved for the city itself, which would be surrounded by another 5,000 acres of green-belt farmland [Haughton and Hunter 2004, pp72]. These figures today are clearly not sustainable, however many overlook Howards vision of emerging social cities linked Garden Cities in a multi-centred metropolis interwoven with green space. This is shown in figure 2 which shows a central town of 58,000 is shown surrounded by six garden cities around its circumference, each with 32,000, providing a city of 250,000 people [Haughton and Hunter 2004, pp 72]. . Figure 2: The Garden City Complex from Garden Cities of Tomorrow: Taken from http://humanitieslab.stanford.edu/UrbanSustainability/943 Highlighted in both figure 1 and 2 is Howards idea of concentric road and rail networks. This idea is seen extensively in modern urban planning, where congestion problems are often eased via ring-road development. These have become an important attribute of the spatial structures of cities, notably in North America [Rodrigue 2005]. Howard was also interested in more than just the physical plans of a city; he also wanted to develop an urban centre where the shared ownership of land was encouraged. Howard wanted the Garden City to be socially, economically, as well as ecologically sustainable [Giradet 1996, pp 54]. While this idea had many merits, these ideas were formulated before cars became widespread and its implications understood. It also came before the huge wave of twentieth-century suburbinization turned Howards garden city idea into much-simplified garden suburbs and created a whole new set of development problems in the process. In recent years the presumption is for high de nsity and brown field development to be used as a sustainable model. Despite the sustainable ideas of the Garden City model did not quite created the modern urban utopia Howard had envisaged. Welwyn Garden City today is a city of 100,000 people and is considered as a Garden City of form rather than function. It serves mainly as a commuter city for London, and its agricultural belt never became a reality [Girardet 1996, pp 54]. Though not realised in its entirety the Garden City concept, of creating a spacious city in the garden has not been forgotten, and there is a strong continued desire to re-instate the countryside in inner cities in the hope of attracting people back to the city centre and to allow those who wish to do so to migrate to new purpose built garden cities, constructed on Greenfield sites [Giradet 1996, pp 170]. More importantly a lot of the ideas are coming from the urban community itself. The concept of urban permaculture (long-term crop growing in the city) has be come fashionable in countries such as Australia, the USA and Germany and there is a growing trend in maintaining sustainable lifestyles within our urban environments [Giradet 1996, pp 138]. Conclusions: The British Garden City experiments were hugely influential policy-expressions of concerns over the problems of large cities during the Industrial revolution [Haughton and Hunter, 2004, pp 73]. The rise of congested and unsanitary urban environments became of great concern, and urban planning became preoccupied with trying to develop ways of making urban development sustainable. Ebenezer Howard was revolutionary in this idea of sustainable growth. He envisioned humane, social, Garden Cities surrounded by greenbelts, encapsulating the idea of a new balance between our cities and our natural environments. These sorts of visionary or utopian writings help expand the framework of permissible ideas for a generation or more. Although mainstream thinkers tend to scorn idealism of all sorts, it has often been extremely influential and successful [Wheeler and Beatly 2004, pp 278]. So successful were the ideas and visions of Howards Garden Cities he lived to see several of them built, and thou gh his ideas never quite materialised beyond this time, his ideas about developing sustainable communities are should still be considered as the foundation of urban policy and planning today. Howard defines the mainstream of utopian tradition. His utopian vision may not have been realised in its entirety, but each had influence on the way contemporary cities, and city life, developed in the twentieth century [LeGates and Stout 2007, pp 300]. The question now, as at the turn of the nineteenth century, remains how to rethink this balance and achieve sustainable city development. The Garden City model, if re-applied in a modern context, could go a long way in helping urban policy makers achieve this goal.

Behavioral Jealousy Essay -- Psychology, Behavior

Behavioral jealousy are actions that occur between an individual who is experiencing envious thoughts and how they internalize and react to the stimuli. Pfeiffer and Wong (1989) â€Å"conceptualize jealous behaviors as the detective/protective measures a person takes when relationship rivals (real or imaginary) are perceived. Detective actions include questioning, checking up on the partner, and searching the partner’s belongings† (p.183). Research suggests that behavioral jealousy is used to maintain relationships. Relationship maintenance refers to either positive or negative behaviors that occur between two individuals in order to maintain a healthy communicative balance. Dainton and Gross (2008) specifically discuss the repercussions that negative behaviors such as jealousy induction may have on relationship maintenance. For instance utilizing negative maintenance behaviors such as jealousy to react to a relationship is negatively associated with relationship satisfaction. This research is tied in with the idea of social support and how individual respond to their partners. Researchers agree that jealousy in relationships can have a negative impact, yet also enhance romantic feelings and satisfaction based on how jealousy is initially communicated (Dainton & Gross, 2008; Yoshimura, 2004). â€Å"An essential idea behind this study is that the ways in which jealous individuals communicate their jealousy influence how the target communicatively responds. The results showed that targets of jealousy expressions most strongly respond in the style of the initial expression† (Yoshimura, 2004, p. 95). The way jealousy is expressed initially based on attitude and mood can affect the response of the partner and at shaping and guiding the relat... ...e a parallel correlation from offline jealousy behaviors. Groothof, Dijkstra, and Barelds (2009) suggest that â€Å"as for offline acts of infidelity, men compared to women are more upset by a mates sexual infidelity over the Internet, whereas women, more than men, are more upset by a mate’s emotional infidelity over the Internet† (p.1126). Research also suggests that besides socio-cultural and evolutionary jealousy based on gender differentiation; further research should focus on individual’s cognitive social perspective pertaining to jealousy emotion. Harris (2002) suggest that â€Å"individuals clearly vary in their susceptibility to feelings of jealousy†¦the degree of jealousy will be determined by the appraisals people make regarding the seriousness of a threat† (p.11). With that said, further research on sexual jealousy triggers should be further investigated.

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over the RAMALLAH, West Bank (AP) - Palestinian leader Yasser Arafat (news - web sites) rebuffed Secretary of State Colin Powell (news - web sites)'s demand Sunday for a halt to violence, saying Israel first must withdraw its troops from the West Bank. Photos AP Photo Slideshows AP Photo Mideast Conflict Audio/Video Powell to Meet With Arafat Sunday (AP) Powell, shuttling back to Israel for a meeting in Tel Aviv, then pressed Prime Minister Ariel Sharon (news - web sites) for a complete pullback, a U.S. official said. Sharon renewed his proposal for an international peace conference among Israel and Arab states including Saudi Arabia, Syria and Lebanon and the Palestinians, but not Yasser Arafat. Sharon said the United States would lead the conference, and "I imagine that within a short time a conference of this sort will convene to debate the diplomatic arrangements in the Middle East." Palestinian negotiator Saeb Erekat said the proposal was an attempt to "turn the clock backward." A senior U.S. official said the idea was discussed "as part of a way to move forward politically," but more talks were needed. Arafat, 72, appeared in good health as he met with Powell in his rocket-scarred headquarters that is surrounded by Israeli tanks and troops. Arafat has been under pressure that is "unreal for an old man like him," said Zeid Abu Shawish, a Palestinian doctor in the compound. Powell was driven to the besieged compound in a motmorcade of armored-plated SUVs, shielded by U.S. security personnel with submachine guns. The headquarters showed the effects of Israeli bombardment. A gaping hole marred the facade and the walls were blackened with bullet marks. A senior aide, Saeb Erekat, said Arafat stood by his commitments, including an end to violence. But, Erekat said after the three-hour meeting, that meant "once the Israelis complete the withdrawal we will, as Palestinians, then carry out our obligations." Arafat complained bitterly and extensively to Powell about Israel's military thrust into Palestinian-held towns and villages, and especially its actions in Jenin and a refugee camp in the town. President Bush (news - web sites) has demanded a pullback right away, but Sharon refused to provide a timetable when he saw Powell on Friday in Jerusalem. They met again briefly Sunday night in Tel Aviv. Powell, in a short statement to reporters, called his meeting with Arafat useful and constructive. A senior U.S. official said Powell's "clear message" to Arafat in a 45-minute presentation was "the bombings have to stop, that it was a major barrier" to progress toward a security agreement or on negotiations that Powell has said should lead to establishment of a Palestinian state.

Study Guide Ap Bio Ch 16-18

Study guide for Ch 16-18 Chapter 16 †¢ Alfred Hershey and Martha chase answered the question whether protein or DNA was the genetic material by using Bacteriophages (viruses that infect bacteria). o Bacteriaphages were good for the experiment because they only contain 2 organic compounds, DNA and protein. †¢ James Watson and Francis Crick were the first to solve the structure (structure=function) of DNA. †¢ X-ray crystallography( process used to visualize molecules in 3-D. †¢ DNA is a double helix- structure †¢ The nitrogenous bases of DNA are( adenine (A), thymine (T), guanine (G), and cytosine (C). The 2 strands (the leading and the lagging strand) are antiparallel. o The leading strand goes in direction 5’ to 3’. o Lagging strand goes 3’ to 5’. Takes longer to replicate cause it’s built in fragments. †¢ Tip from the book(know these enzymes for replication: DNA polymerase, ligase, helicase, and topoisomerase. Know thi s enzyme for transcription(the role of RNA polymerase. †¢ Replication(making DNA from already existing DNA strand. DNA replication is semiconservative (1/2 of original DNA and the other ? is from new DNA strand). This is used by humans! A group of enzymes called DNA polymerases catalyzes the elongation of new DNA at replication fork. The overall direction of DNA replication goes from the origin to the fork. o DNA polymerase adds nucleotides to the growing chain one by one; working in a 5’ to 3’ (DNA build strand (â€Å"new†) or RNA polymerase go 5’(3’ in the build strand). Parent strand DNA and RNA polymerase is 3’ to 5’. o DNA polymerase matches adenine with thymine and guanine with cytosine o The lagging strand is synthesized in separate pieces called Okazaki fragments (which segments in 3’(5’), which are then sealed together by DNA Ligase.Forming a continuous DNA strand. †¢ Many factors in replication: o Bas e pairing in DNA replication( A=T/ G=C. o Mismatch repair(special repair enzymes fix incorrectly paired nucleotides o Nucleotide excision repair. †¢ Tip****(know the difference between replication (DNA to DNA), transcription (DNA to RNA), and translation (RNA to protein). †¢ In Eukaryotic cells, DNA and protein are packed together as chromatin. o Heterochromatin(very condensed chromatin. o Euchromatin(loosely condensed chromatin. Telemer region(small fragment of DNA that is lost during replication due to enzyme’s inability to attach the fragment on to the end of the DNA helix. (This is our biological clock). Chapter 17 †¢ Gene expression(the process by which DNA directs the synthesis of proteins (or sometimes RNA). †¢ Transcription= DNA(RNA o Takes place in the nucleus in eukaryotic cells. †¢ Messenger RNA (mRNA) produced during transcription. It carries the genetic message of DNA to the protein making machinery of the cell in the cytoplasm, ie the ri bosome. The mRNA triplets are called codons (a codon is a mRNA triplet). o mRNA is read codon by codon. ? Start codons and stop codons are used in the build strand the protein coding segment is between the start codon and stop codon in the build strand. †¢ They are written in the 5’ to 3’ direction. †¢ More than one codon codes for each of the 20 amino acids. Genetic code includes 64 codons (4 x 4 x 4). o The group must be read in the correct groupings in order for translation to be successful o 3 codons act as signal terminators (UAA, UAG, UGA) o AUG always has to be start codon. RNA polymerase(enzyme that separates the 2 DNA strands and connects the RNA nucleotides as they base-pair along the DNA template strand. o RNA pol. Can add RNA nucleotides only to the 3’ end of the strand. REMEMBER†¦ uracil replaces thymine when base pairing to adenine. ==>difference betw DNA and RNA. o The DNA sequence at which RNA pol. Attaches is called the Promoter. o The DNA sequence that signals the end of transcription= Terminator. †¢ Transcription unit(the entire stretch of DNA that is transcribed into an RNA molecule. †¢ 3 main stages of transcription: from the book. Initiation (RNA polymerase that transcribes mRNA cannot bind to the promoter region without supporting help from proteins known as transcription factors. transcription factors assist the binding of RNA polymerase to the promoter, thus the initiation of transcription) Notes: o Elongation (RNA polymerase moves along the DNA, continuing to untwist the double helix. RNA nucleotides are continually added to the 3’ end. As this happens, the double helix re-forms. Notes: †¢ Termination (RNA polymerase transcribes a terminator sequence in the DNA, the RNA transcript is released, and the polymerase detaches. There a couple of key post-transcriptional modifications to RNA( the addition of a 5’ cap and the addition of a poly A Tail (3’). †¢ RNA sp licing also takes place in eukaryotic cells. Large portions of the newly synthesized RNA strand are removed. This is the parent strand. o The sections of the mRNA that are spliced out are called introns. o Sections that are spliced together by a spliceosome(exons. ? The new strand containing the exons is called the build strand, which runs in a direction of 5’ to 3’.Remember parent strand runs in 3’ to 5’. †¢ Small nuclear RNA (snRNA)( plays a major role in catalyzing the excision of the introns and joining of exons. o Ribozyme is when RNA serves a catalytic role. †¢ Translation: o 2 additional types of RNA play important roles in translation besides mRNA: ? Transfer RNA (tRNA) and ribosomal RNA (rRNA). †¢ tRNA functions in transferring amino acids from a pool of amino acids located in cytoplasm to a ribosome. These amino acids are incorporated into a growing polypeptide chain. At one end of a tRNA it loosely binds the amino acid, and at th e other end it has a nucleotide triplet called an anticodon (allows it to pair specifically with a complementary codon on the mRNA). †¢ rRNA complexes with proteins to form the 2 sub units that form ribosomes. o Translation can be divided into 3 steps ? Initiation, Elongation, and Termination (descriptions of these steps can be found on pg 129-130 I got lazy so fuck off) †¢ The review guide goes into mutations on pg 130 but I think that you’re better off reading the guide than reading my description. Chapter 18 In bacteria, genes are often clustered into units called operons. †¢ Operon consists of 3 parts: o Operator: controls the access of RNA polymerase to the genes, it’s found within the promoter region. ? Normally in on position. In a repressible operon. o Promoter: where RNA polymerase attaches. o Genes of the operon: the entire stretch of DNA required for all the enzymes produced by the operon. †¢ Regulatory Genes(produce repressor proteins th at may bind to the operator site. When a regulatory protein occupies the operator site, RNA pol. Is blocked from the genes of the operon. Repressible operon( normally on. It can be inhibited. This type of operon is normally anabolic. o The repressor protein produced by the regulatory gene is inactive. o If the organic molecule being produced by the operon is provided to the cell, the molecule can act as a corepressor, and bind to the repressor protein(this activates it. ? The activated repressor protein binds to the operator site, shutting down the operon. †¢ The lac operon is inducible o Controls the production of B- galactosidase an enzyme that catalyzes the hydrolysis (break down) of lactose into glucose and galactose ?Inducible operon(gene expression B-galactosidase is stimulated by the presence of a co inducer, lactose. †¢ Turns the repressor gene switch off. o This is notes on gene expression on tryptophan. Next stuff is from book. ? Inducible operon( normally off bu t can be activated. This type of operon is catabolic, breaking down food molecules for energy. The repressor protein produced by the regulatory gene is active. †¢ To turn the inducible operon on, a specific small molecule, called an inducer, binds to an inactivates the repressor protein.With the repressor out of the operator site, RNA polymerase can access the genes of the operon. o 2 regulatory mechanisms used to turn on lac operon ? Presence of lactose as co inducer ? Low amounts of glucose. †¢ These 2 are the only way for this shit to work yo! †¢ Differential gene expression in eukaryotic cell gene expression o The expression of different genes by cells with the same genome. †¢ Histone acetylation( acetyl groups are added to amino acids of histone proteins, thus making the chromatin less tightly packed and encouraging transcription. DNA methylation( the addition of methyl groups to DNA it causes chromatin to condense, thus reducing gene expression. o With the help of phosphorylation next to a methylated amino acid, chromatin becomes loosened and thus encouraging transcription. †¢ Epigenic inheritance( the inheritance of traits transmitted by mechanisms not directly involving the nucleotide sequence. †¢ Transcription initiation is where DNA control elements that bind transcription factors are involved in regulation. Control elements( multiple control elements(segments of non coding DNA that serve as binding sites for transcription factors that help regulate transcription. o This is necessary for the precise regulation of gene expression in diff cell types. o Proximal and Distal control elements. ? Proximal control element has to be right next to promoter anything else is distal. †¢ Transcription factors( o Enhancer regions are bound to the promoter region by proteins called activators. o Some transcription factors function as repressors, others function as activators. Extra stuff †¢ TATA box is at the beginning of prom oter region.

Labor, Stocks and Bonds

According to the basic law of demand and supply, increases in the real wage rate or the price of labor must decrease the quantity of labor demanded, as employers find it increasingly expensive to hire more people.   Would increases in the real wage rate, therefore, decrease the productivity of the firm, that is, the number of the outputs that it produces? – Not necessarily. This is where the assumption of diminishing marginal product of labor steps in to save the firm from significantly reducing its supply of outputs.   Marginal product of labor refers to the â€Å"increase in output produced from a given capital stock when an additional worker is employed (â€Å"Marginal Product of Labor†).†Ã‚   On the other hand, diminishing marginal product of labor means that â€Å"each additional labor hour results in less and less extra output (â€Å"Costs of Production†).   This assumption is explained by the popular saying, ‘Too many cooks spoil the broth.’   Thus, the firm does not need to increase its demand for labor beyond a certain number in any case. Stocks and Bonds The dissimilarity between stocks and bonds is explained by the difference between â€Å"owning and lending (â€Å"The Difference Between a Stock and a Bond†).†Ã‚   The purchaser of a stock is a part owner of the company whose stock he has bought.   He gets to vote on the way the company should be run, and enjoy dividends in addition to â€Å"capital appreciation† as a participator in its success (â€Å"The Difference Between a Stock and a Bond†). Of course, he gets to participate in the failures of the company to boot, through lower dividends and stock prices.   The purchaser of a bond, on the contrary, will be paid before the stockholders in the case of company failure.   He has lent money to the company after all.   The company, in turn, promises to repay its loan at a fixed time, with interest.   Even so, the purchaser of the bond does not enjoy extra interest when the company performs exceptionally well (â€Å"The Difference Between a Stock and a Bond†). Works Cited â€Å"Costs of Production.† Ohio State University. 8 Oct. 2007. . â€Å"Marginal Product of Labor.† London South East. 8 Oct. 2007. . â€Å"The Difference Between a Stock and a Bond.† Cash +, Issue 1 (Fall 2006). 8 Oct. 2007. .

Early History of America: What Factors Allowed Jamestown To survive it’s First Fifteen Years

In XVI and early XVII century many of the European nations tried to establish their colonies in that part of the New World, which is now known as North America. English attempts appeared to be most successful when Virginia Company received a relevant consent from King James I and settled a colony called Jamestown after James in 1607. Colonists had to face enormous hardships in their first years in the new country, however, they managed to found a permanent colony – a core for further exploration of the continent.This paper is to examine and analyze the factors which sustained the colonists success for fifteen years: since 1607 till 1622 using examples from the book â€Å"A Land as God Made It† by James Horn, using the edition published in 2006. The paper shall discuss those factors being divided into two periods: from 1607 to 1615 and from 1615 to 1622 and how those factors relate to the total history of Jamestown. The paper shall deal with both positive and negative ef fects of those factors to make a complex and balanced research. Horn’s book possesses two remarkable characteristics.On the one hand it is a rather calm and reserved story told without unnecessary fanfares. To the first look it may seem that the author is at all not interested in Jamestown as he speaks about Indians inhabiting the place, previous colonization attempts, and does not admire the romantic story of Pocahontas. English colonists are only a part of the epic history of European movement to America and he describes the story in context. On the other hand Horn is able to create a feeling of â€Å"living history†. He knows the people of XVII century well and pays much attention to their everyday life.A reader can smell smoke of fires, hear gunshots and warlike shouts, being personally in the story. â€Å"A Land as God Made It† is a very atmospheric book. At that Horn does not lose the trend and remains a historian but not a belletrist. The book is based on facts but not on legends and is a solid scientific research. Although Horn gives more descriptions than analysis, the factors which influenced Jamestown can be easily derived from the book. Further those factors shall be found and analyzed. The first major factor, leading to survival of Jamestown throughout it’s entire history was the GEOGRAFIC LOCATION.Actually, Jamestown has not been the very first settlement of Europeans in Virginia. Already in 1570 the Spanish have created a fort of Saint Augustine to protect their trade routes from the pirates as well as for protection of a Catholic mission from the Indians. There were several French attempts to colonize the place but they failed mostly because of the Spanish attacks and little interest of the French government to Virginia. And in fact the Spanish seemed to be the most dangerous enemies of the English in America as well as the French and the Dutch.So the departing colonists have been instructed to find a place, which wo uld be safe and easy to defend from attacks of Europeans, but little attention has been paid to Indians and to solving hardships with food supplies, which the people of Jamestown later faced. The colonists have made their first permanent camp after several weeks of explorations on a peninsula in the southern part of Chesapeake Bay, and there were several important reasons for this. The chosen place has been situated about fifty miles away from the oceanic coast to avoid surprise attack by the Spanish.It was surrounded with water with only a narrow portion of sandy terrain tying it with the land. This vulnerable direction could be easily defended by a wooden fence, which the settlers immediately started to build. There was plenty of fish in the bay for food. The bay itself was deep enough to allow big ships sail in it and moor near Jamestown transporting provision, arms and equipment and taking colonial production from Jamestown. On the side of the river the settlement could be defen ded by ship’s cannons . However, there were also several disadvantages.The land was quite moistly and unsuitable for agriculture, as well as the peninsula itself lacked building materials like wood and stone. Fresh water was dirty and the surrounding waters were salty. There were no proper sources of water in the surrounding, which later caused many hardships to the settlers including diseases and numerous deaths from dehydration when the colonists were not able to get water from outside the settlement. Local Indians appeared to be very antagonistic to the Englishmen and this often precluded them from leaving the settlement and forced the colonists to survive on a small site of land.Some of those difficulties were solved via negotiations with the Indians. This makes the second factor: BUILDING RELATIONSHIPS WITH INDIANS. Captain’s John Smith diplomatic ability played an important role in survival of the colony right after it has been founded. Local Indian tribes have b een united to the Powhatan alliance headed by a great chief Wahunsonacock. Smith became engaged in the series of negotiations, which Horn called â€Å"one of the most remarkable series of encounters between Englishmen and Indians in the New World.† Smith managed not only to provide the safety of the colony from Indian attacks in it’s first and most vulnerable two years, but also to barter enough food for colonists in their first and most harsh winter. Smith organized explorative expeditions around the Chesapeake Bay and successfully traded food with Nansemond Indians. Later he entered into negotiations with Powhatan Confederacy of Indians, which were initially successful, and than after certain misunderstandings arose, almost lead Smith to death and saving by Pocahontas.The relations between colonists and Indians have been to a great extent based on Smith’s personal authority and his ability to understand and accept Indian customs. It is known that he even recei ved proposals to leave the settlement and become a mighty chief of the local tribes, which he rejected. In 1609 Smith had an accident with firearms and has been sent to England for medical treatment. There is little clarity with the accident and Horn makes an assumption that this could be a result of quarrels between colonists themselves.Whichever thing happened, Smith’s departure resulted in frosting of the relationships and further conflict between the Indians and the settlers. Negotiations after 1609 were mostly fruitless, and the war broke out again until in the last portion of the colonists was killed in a slaughter leaving the colony deserted in 1622. Shortly thereafter however it has renewed and the British government of Virginia started expelling all indigenous peoples from the country except those who became slaves. Thus a policy of graduate displacement of Indians by the Europeans has begun.Trading food with Indians allowed the settlement only to survive it’s harshest times, however, active living and exploration would never be possible without the next crucial factor which is active SUPPORT FROM THE HOMELAND. As soon as the first fortifications in Jamestown have been completed, the ships Newport and Susan Constant left back for England with samples of local minerals, leaving only one small vessel to serve the settlers needs. In the next 18 months Newport has twice sailed to from England to Jamestown and back bringing 70 new colonists and small supplies of food and materials.This is now known as the first and second supply missions, but in fact there were too little supplies for colonists to survive, so they had to make contacts with Indians. Together with Newport other vessels brought skilled craftsmen recruited by the Virginia Company to start industry in Jamestown, including people from Holland, Germany and even Poland. Later these were added by Italians, perhaps starting a tradition of national diversity in America and making Jamest own the first â€Å"melting pot† in North America. Seeing colonists hardships in the new land Virginia Company decided to take the point of supplying Jamestown more seriously.The Sea Venture, a new flagship of the Company, together with eight other vessels sailed to Jamestown in 1609 carrying the third batch of supplies for the colony. In the course of the voyage the fleet had to face a mighty hurricane and Sea Venture was lost near the Bermuda Islands. The survivors managed to build a smaller vessel from the remains of Sea Venture and local tincture and arrive to Jamestown in May 1610. They have found only about a hundred colonists out of original 500, who were willing to leave the colony. However, the governor of Virginia forced them to come back on the half-way home and continue the settlement .Thusly, imperative will of the British authorities can be considered to be a yet another factor, which contributed to development of Jamestown. In May 1611 three more ships arrived to Jamestown, bringing supplies, cattle and a new governor appointed by the Company – Sir Thomas Dale. The latter decided, that living conditions at the site were unhealthy and called upon reconstruction of Jamestown as well as started arranging expeditions to find a better site for the colony near James River. At a distance up the river Dale started building a settlement of Henricus – a probable place for a new capital of Virginia.A remarkable supply party arrived in 1619, which included the first Africans to live in North America (unfortunately as slaves) and 90 unmarried women, who were to become wives for single men of Jamestown. However, they were not the first women in Jamestown, as the first ones arrived as wives and maids in 1607, and by 1619 there were already several growing children of Englishmen, who could proudly call themselves Americans. The fourth important factor influencing life in Jamestown was PRODUCTION AND TRADE WITH THE BRITISH HOMELAND.Virginia Company had a precise aim of obtaining profits from the colony and would never support the colonists, in case they would generate none. Already in 1608 the Company demanded the council of the colony to send commodities which would pay the voyage and to start winning gold, as they were sure that there is enough gold in the New World. Already Newport brought samples of local mineral pyrite, which the colonists confused with gold. However, by 1611 the colony was almost dead since it’s economic effect was vanishing and only King’s desire to have an outpost in America supported the existence of Jamestown.The only goods which the colonists were able to produce and attempted to export were artifacts of glass. In 1611 however John Rofle’s attempts to raise an export of tobacco yielded their fruits. He started growing new sorts of Nicotiana Tobacco brought from England which were better than local Nicotiana rustica. Successful export of tobacco grown at Rofle’s fa rm began in 1612. In 1616 he took a voyage to England to persuade investors to provide funds for further development of industry in Jamestown. Upon his return to Jamestown Rofle continued to improve the quality of tobacco, so by 1622 it’s production grew rapidly .Due to rising interest of investors to tobacco production in Jamestown, the so-called â€Å"hundreds† have been established. A hundred was a sort of agricultural division capable of growing certain amounts of agriculture at a certain area. The hundreds created tobacco plantations in the surroundings of Jamestown and later throughout Virginia. In 1617 the export of tobacco reached 50 000 pounds annually creating an economic basis for survival of the colony. Except the mentioned factors there were some, which are less measurable: religious and moral ones.Almost all the settlers were protestants, who, by virtue of their religious beliefs, took rough with smooth and had a habit for hard work and moderation as well as carried spirit of enterprise and initiative with them. This attitude and this spirit later contributed to prosperity of the country. Europeans tried to begin living in North America for many times. Jamestown appeared to be one of the most successful project of all. Each of the mentioned factors was present in other European colonies, but their successful combination and perhaps luck made exactly Jamestown the most successful of all.

Positive Relationship with Children Essay

1.1. Positive relationships with children and young people are important because when children feel comfortable they separate more easily from their parents, and are more likely to participate in activities if they secure emotionally. Also when children have positive relationships they are less likely to show unwanted behaviour as we can recognise and meet their individual needs. Childrens language will also develop more quickly due to being confident to talk to us. Us as practitioners can also plan more accurately as we’ll understand childrens development and we will know their individual interests. It is also important as we will be able to respond to a Childs emotions due to their facial expressions and the way they are acting when we know them and have a bond with them. We also have to remember that we are to build professional relationships. The principles of relationship building and to keep them maintained are communicating effectively, identifying and sorting out conflicts and disagreements, being consistent and fair, showing respect and courtesy, valuing and respecting individuality, keeping promises and honouring commitments, monitoring impact of own behaviour on others, keeping confidentiality as appropriate and recognising and responding appropriately to the power base underpinning relationships. 1.2. Observation 1.3. My own effectiveness in building relationships with children or young people is that when you get to know each child individually i feel more comfortable, because i know they feel comfortable due to them knowing me and respecting them. I involve all the children in my activities no matter what the age gap unless the activitiy is un suiteable for that age group. I ensure in myself that i treat each child in the same way, as no child has higher priority than the other they all get treated fairly. I also feel like i have achieved building relationships with the children when you see them after a weekend or the next day because they smile and are excited to come to nursery again. 2.1. Positive relationships with people involved in the care of children and young people are important. Other people involved other than their family are organisational managers, carers, other visitors, colleagues from other agencies and services, external partners, official visitors, and colleagues. If we do not have positive relationships with these people involved in the childrens lives that attend nursery there is danger that information might be passed un –accurately and that it is withheld because we may not be trusted. It is important that we all work together to build trust with everyone and the benefits the child will get if we do so are children are given consistent care, childrens needs and interests are identified, plans for childrens care and education are more effective, childrens welfare can be properly monitored, and skills and ideas can be shared quickly between adults.