Foam Definition in Chemistry

A foam is a substance made by trapping air or gas bubbles inside a solid or liquid. Typically, the volume of gas is much larger than that of the liquid or solid, with thin films separating gas pockets. Another definition of foam is a bubbly liquid, particularly if the bubbles, or froth, are undesirable. Foam can impede the flow of a liquid and block gas exchange with air. Anti-foaming agents may be added to a liquid to help prevent bubbles from forming. The term foam may also refer to other phenomena that resemble foams, such as foam rubber and quantum foam. How Foam Forms Three requirements must be met in order for foam to form. Mechanical work is needed to increase the surface area. This can occur by agitation, dispersing a large volume of gas into a liquid, or injecting a gas into a liquid. The second requirement is that surfactants or surface active components must be present to decrease surface tension. Finally, the foam must form more quickly than it breaks down. Foams may be open-cell or closed-cell in nature. Pores connect the gas regions in open-cell foams, while closed-cell foams have enclosed cells. The cells are usually disordered in their arrangement, with varying bubble sizes. The cells present minimal surface area, forming honeycomb shapes or tessellations. Foams are stabilized by the Marangoni effect and by van der Waals forces. The Marangoni effect is a mass transfer along the interface between fluids due to surface tension gradient. In foams, the effect acts to restore lamellae (a network of interconnected films). Van der Waals forces form electric double layers when dipolar surfactants are present. Foams are destabilized as gas bubbles rise through them. Also, gravity pulls liquid downward in a liquid-gas foam. Osmotic pressure drains lamellae because of concentration differences throughout the structure. Laplace pressure and disjoining pressure also act to destabilize foams. Examples of Foam Examples of foams formed by gases in liquids include whipped cream, fire retardant foam, and soap bubbles. Rising bread dough may be considered a semisolid foam. Solid foams include dry wood, polystyrene foam, memory foam, and mat foam (as for camping and yoga mats). Its also possible to make a foam using metal. Foam Uses Bubbles and bath foam are fun uses of foam, but it has many practical uses, too. Fire retardant foam is used to extinguish fires.Solid foams may be used to engineer strong yet light materials.Solid foams are excellent thermal insulators.Solid foams are used to make flotation devices.Because solid foams are light and compressible, they make an excellent stuffing and packing material.A closed-cell foam called a syntactic foam consists of hollow particles in a matrix. This type of foam is used to make shape memory resins. Syntactic foams are also used in space and deep-sea exploration.Self-skin or integral skin foam consists of a dense skin with a lower density core. This type of foam is used to make shoe soles, mattresses, and baby seats.

Jeremy Bentham Criminal Justice Essay - 1609 Words

Jeremy Bentham’s Influence on the Criminal Justice System: Past and Present The delivery of punishment has changed significantly over the centuries. Up until the 19th century in England, imprisonment was not regarded as a punishment, it was merely used while the offender waited to be sentenced to their ‘real’ punishment (Bull, 2010; Hirst, 1998). Corporal punishment such as flogging, branding and mutilation, death by hanging, and transportation to other continents such as America and Australia were common punitive measures through the ages, until well into the 1800’s (Newburn, 2003). Although these extreme penalties are no longer acceptable or practised by criminal courts in England or Australia, in some ways, the past has†¦show more content†¦In other words, a person may be tempted to commit a crime if there not a strong enough deterrent in place. Hence, Bentham’s solution to crime control was to address this pleasure/pain response by imposing strict penalties proportional to the seriousness of the c rime committed to discourage people from offending (Von Hirsch, 1992). Although he did not support the death penalty, punishment for committing crime was considered by Bentham as the lesser of two evils, necessary for the health of society and the duty of the government to impose (Bull, 2010; Hudson, 2003). Punishment, for Bentham, was a way to ensure â€Å"the greatest happiness for the greatest number† (Rosen, 2003, p 221). Bentham argued that prevention, both general and specific, is paramount in controlling crime. The imprisonment of the offender serves the purpose of specific prevention. Specific prevention involves three tiers: incapacitation, reform/rehabilitation and deterrence (Hopkins Burke, 2011). Firstly, incapacitation is achieved by physically removing an offender from society, rendering them unable to reoffend (specifically, by placing them in prison). Secondly, rehabilitation seeks to take away the desire to offend, by teaching the offender that anyShow M oreRelatedJeremy Benthams Utilitarianism is a Convincing Method for Normatic Ethics891 Words   |  4 Pagesethics, utilitarianism wasn’t fully expressed until the 19th century. Jeremy Bentham and John Stuart Mill, acknowledged the good with pleasure. Both of the philosophers believed we ought to make the most of the good, everyones happiness is the same no matter what type of happiness it is. When one fulfills their good, it doesn’t mean one’s individual good doesn’t count more when compared to someone else’s good. Jeremy Bentham was born on February 15th, 1748 in Houndsditch, London and died on JuneRead MoreFeatures Of Classical Criminology779 Words   |  4 Pagesâ€Å"criminology† is the scientific study of criminals and the crimes that they commit. It incorporates numerous disciplines such as law, sociology, history and physiology as well as other disciplines like victimology which are more focused disciplines within criminology. Sutherland (1939) gives the view that criminology is based around â€Å"three great tributaries† these are: The study of crime, the study of these that commit crime and the study of criminal justice and penal systems. Within this essay theseRead MoreTraditional Assumptions Of The Civil Justice History865 Words   |  4 Pagestraditional assumptions.† American correction page 34. I must say, that period was the most important in the Criminal Justice history. Through that era, revolutions occurred in America as well as France, science made great advances and Industrial Revolution gained absolute power. This Age of Reason was like a stand against those with power. This reformation ended the reign of the Catholic Church and the writing of Martin Luther and John Calvin encourage new emphasis on the individual alongRead MoreTheories Of The Age Of Enlightenment1026 Words   |  5 PagesBefore the 17th century, people believed that when someone committed a criminal act it was not because they chose to do so, but because of some supernatural force, such as the full moon or demonic possession. Offending acts were punished by a wide range of inhumane acts including but not limited to being tarred and feathered, quartered, burned alive, beheaded, drowned, or stoned to death. This way of thinking and punishing offenders continued through the 1600’s until the Age of Enlightenment. ItRead MoreEssay on Jeremy Bentham Influence on Future1290 Words   |  6 PagesEssay on Jeremy Bentham’s influence Jeremy Bentham was born in 1748 in London, England. He was a utilitarianist, which is the idea that the right judgment is the judgment that brings the most happiness. Also an Atheist, Bentham was seen as the person who popularized utilitarianism. Bentham believed we could quantify or measure pleasure. He helped found the London College, in which his body was embalmed and used as a reminder of himself, and wrote many books on utilitarianism and found the best wayRead MoreThe Debate Over Death Penalty1618 Words   |  7 Pagesand scholarly discussions. The death penalty has a long and distinguished history in the United States, as it has been around in some form—either official or otherwise—since the beginning of American society. America originally adopted the British justice system, with hundreds of crimes being punishable by death. Slowly but surely, states began to eliminate the number of things that could lead to the death penalty. Likewise, new methods were introdu ced, with the electric chair coming about around theRead MoreAnalytical Philosophy : The Law Of The Land As It s Exists Today1049 Words   |  5 Pagesunderstand the nature of law. Although John Austin is considered the father of the school of analytical jurisprudence, the origins of this school of thought date back to the time of Jeremy Bentham (1748-1832). Bentham’s work has come into light recently is now known to be the founder of this approach. Austin owes a lot to Bentham as much of his work is just a â€Å"para-phrasing† of Bentham’s work. Scope of analytical school of jurisprudence can be observed as follows:- †¢ Analysis of the legal system andRead MoreHate Propaganda And The Criminal Code Of Canada1589 Words   |  7 Pagesis in Sections 318, 319, and 320 of the Criminal Code of Canada, and it states that Hate propaganda means any writing, sign or visible representation that advocates or promotes genocide or the communication of which by any person would constitute an offence under section 319. and â€Å"Every one who advocates or promotes genocide is guilty of an indictable offence and liable to imprisonment for a term not exceeding five years.† Under s. 319(1) of the Criminal Code, â€Å"anyone who communicates statementsRead MoreThe Classical School And The Positivist School881 Words   |  4 Pagesfully bloom until the 1800s when criminal laws were being made and enforced (Altrichter, 2015). With this in mind, the first school to be developed through criminology was the classical school. The classical school was founded upon the thoughts and ideas of Cesare Beccaria a nd Jeremy Bentham (Altrichter, 2015). Cesare Beccaria implicated the idea that a crime is to be punished depending on its severity and rather not the criminal (Altrichter, 2015). Jeremy Bentham contributed to the classical schoolRead MoreDeterrence Theory And The Criminal Justice Field Essay1578 Words   |  7 Pagesbased upon a belief that citizens choose to obey or violate the law after determining the advantages and disadvantages of their actions (Paternoster, 2010). Deterrence, in the criminal justice field, dissuades individuals from criminal activity and from continuing to live a life of crime after committing the first criminal like act (Dutton, 2014). Law enforcement provides sanctions in the form of imprisonment, probation and fines (Paternoster, 2010). In the United States, a practical example of deterrence

PMP critique Free Essays

Answers Keller excess Depths Quote excess Papaya Mondale excess 1. 0 Executive summary This project plan was given by Ecological Foot Print Inc. For â€Å"Us Ecological Foot Print App† developing. We will write a custom essay sample on PMP critique or any similar topic only for you Order Now This project is to design a mobile-based application that runs both android and ISO mobiles. And the delivered application should also be able to make any upcoming changes in the future. The deliverables required from this application are to help people live and work more sustainable by setting targets for achieving greenhouse gas savings through individual self-motivation and help a better environment. The ultimate aim of the project Is to have a better quality of life by setting goals that every individual should be able to meet. Measurement tools, In the app will help individuals to compare the Impacts that different satellites or everyday decisions might have, whether they take place In the home, school or office, or In managing an event. The app will allow Individuals to Investigate areas related o food, travel, power usage, and other factors such as use of shopping bags, recycling etc. This application will utilize the data regarding the areas weather conditions. Sheldon Cooper Is the CEO of the project. Leonard and Sheldon are the joint sponsors of the project. The allocated budget of the project is $150,000 and the of February 2014 and scheduled completion date is on sixth of May 2014. The minimum required deliverables for the project are: Project Initiation Project Charter Kick-off meeting minutes Project Planning Scope Statement Work Breakdown Structure (WEBS) Schedule (Giant chart) Network Diagram Responsibility Assignment Matrix (RAM) Risk Management Plan Detailed Budget Project Executing Product related deliverables Project Controlling Milestone report Weekly status reports Weekly team meeting minutes Change Requests Project deliver 2. 1 Introduction 2. 2 Name Us Ecological Foot Print App 2. Description The aim of the project is to design an android and ISO based application to help people live and work more sustainable by setting targets for achieving greenhouse gas savings through individual self-motivation and help a better environment. Victoria is high in using the natural resources and emitting carbon dioxide levels, so he aim of this app is to allow individuals to investigate areas related to food, travel, power usage, and other factors such as use of sh opping bags, recycling etc. The app will utilize data regarding an individual’s city weather conditions. Individuals will be compared to those of their state, country and the world. With the use of this application, people should live and work more sustainable by setting targets for achieving greenhouse gas savings through individual behavior modification and indirectly through other peoples’ or organizations behaviors which can be influenced. The allocate budget and time is $1 50,000 and four months respectively. 2. 4 Sponsor details: Sheldon Cooper CEO, Big sang Inc. Melbourne 3000 Phone: 0401234567 e-mail: csheldon@bigbang. Com. U Leonard Hovercrafts Director, Mobile Development 301 global shine Phone: 0401234568 e-mail: hleonard@mobdev. Com. AU Project manager and team members: The project consists of a project manager, two programmers and a digital image specialist that work on the application. Their details are as given below: Name Role Played Contact Details Andy Project Manager Ph: 0400000001 andy@ecofootprint. Com Answers Keller Programmer Ph: 0400000002 annu@ecofootprin t. Com Depths Quote Image specialist Ph: 0400000003 deepu@ecofootprint. Com Papaya Mondale Ph: 0400000004 pappy@ecofootprint. Com 2. Deliverables: Software: Fully functional Android and ISO based application that lets users compare the impacts that different activities or everyday decisions might have, whether they take place in the home, school or office, or in managing an event. The app will provide individuals with an overall ranking in terms of food, travel, shelter, and goods and services, and advice around these. 2. 6 References: Scalable, K. (2006). Information technology project management, (4th De. ). Cambridge,MA: Course Technology De Never, Loch $ Pick 2002 Definitions: decompose the tasks into smaller components. Giant Chart: It is a bar chat used to illustrate the project schedule with start and finish dates. Network Diagram: Network diagram in a project involves sequence of steps represented in blocks linked sequentially according to the dependencies. Responsibility assignment matrix (RAM): Used to clarify roles and responsibilities of each member involved in the project. Project Charter: It is a statement of scope, objectives and participants in a project. Identifies stakeholders, and defines authority of Project Manager. Project Management Plan (PM): It s a document that consists of project planning, assumptions, communication, schedule, budget etc. Software Development Life Cycle (OSDL): Describes the process of planning, analyzing, designing, testing and maintenance of an IT project. 3. 0 Organization: 3. 1 Organizational Charts: Ecological Footprint Inc. Barnett Rosenstein Ski-Willowiest Ecological Footprint (Project Manager) Amy Affray Fowler (Green House Gas specialist consultant) 3. 2 Project Responsibilities: See Appendix A – Responsibility Assignment Matrix . 3 External interfaces: Hardware Provider: Apple store www. Apple. Com. AU pH: 03 9300 0000 Kevin Susann (user representative- ecological footprint) e-mail: skevin@ecofootprint pH: 0409999999 4. 0 Management and Technical Processes 4. 1 Management Objectives The Senior Management of Ecological foot print Inc. , have identified the need for help people live a sustainable life and has allocated $1 50,000 for its development. This app will be mobile based that will run on phones and androids and will help people to set targets for achieving Green house gas savings. The senior management of Ecological foot print Inc. Just at least include measurement tools that will help individuals to compare the impacts their different activities or everyday decisions, whether they take place at the home, school or office, or in managing an event. The app should allow individuals to investigate areas related to food, travel, power usage, and other factors such as use of shopping bags, recycling etc. And must also utilize the data regarding the area’s weather conditions. 4. 2 Project Controls To manage and monitor the status and progress of the project, several documents have been developed. How to cite PMP critique, Papers