The economics of labor market Assignment Example | Topics and Well Written Essays - 250 words

The economics of labor market - Assignment Example By consuming leisure you are forgoing the wage you could have earned by working that hour.as the wage increases leisure get more expensive and you consume less leisure. That is as the wage increase you work more hours Income effect- leisure is a normal good as you get wealthier you’ll want to consume more leisure. As the wage you receive increase you become wealthier and thus will want to consume more leisure. Thus as the real wage increase you work fewer hours 5) hire another worker as long as the worker adds at least $1 to profits or hire another worker as long as the cost of that worker (his wage) is less than or equal to the value of that worker’s extra output. 6) Technological advances decrease demand for labor Anything that changes either the amount of output workers can produce or the price of that output will shift the labor demand curve. Fishers, for example, would be more productive if they were provided with better training, more equipment, or improved technology, so all of these things would tend to increase the demand for

X-ray Photons Essay Example | Topics and Well Written Essays - 2000 words

X-ray Photons - Essay Example The intensity of beam if then given by the number of photons passing through a given area per unit time. As the intensity is also proportional to the square of the electric field it follows that magnitude of the field is quantised (Dendy & Heaton, 1999). Thus A beam of x-ray photons is heterogenous and presents both fields: electrical and magnetic. Because X-ray beam is not originated from a point source it's divergent by its nature. In this way the magnification of the image could be achieved by the increase of the focus distance (direct dependence). Because of the existence of two different types of photon interaction within the x-ray tube there is important what peak voltage is used. The energy of electrons depends on the voltage between the anode and cathode. Higher peak voltage produce photons with higher energy (Aichinger et al., 2003). Thus measurement of the practical peak voltage is used for the quality control of X-ray units (Ramrez-Jimnez et al., 2004). There are some types of X-ray photons dependently on their origin and type of interaction with target atom. If the projectile electron interacts with an inner-shell electron of the target atom rather than an outer-shell electron than characteristic x-radiation can be produced (Christensen et al., 1979;). Contrarily to the characteristic interaction Bremsstrahlung (braking) x-radiation occur when the projectile electrons lose their kinetic energy in the interaction with the nucleus of a target atom (Aichinger et al., 2003). Actually, X-ray tube is very ineffective device - only small part of energy is transformed in X-ray beams while the rest just produce heat (Aichinger et al., 2003). Only small part of the anode surface is involved in x-ray production. This area is called as the "focal spot". There is known that smaller focal spots is more useful for imaging purposes because they generate less blurring and provide better visibility of image details. Thus X-ray tubes with small focal spots are useful for decrease of radiation loading (Aichinger et al., 2003). X rays interact with irradiated substances in form of photoelectric effect, dispersion and forming of pairs "electron-positron" (Aichinger et al., 2003) They have high penetrating capacity, its property is described by formula: I=I0e-rt, where I0 - is intensity of the beam of X-rays, - attenuation coefficient (Aichinger et al., 2003). The depth of penetrating depends on the half-value thickness, i.e. the thickness of an absorbing substance that reduces the intensity of x-ray beam to half its value (i.e. I0/2). The half-value thickness depends on the attenuating properties of the substance itself and the penetrating power of the radiation incident upon it. This property is used for such radiographic tests as roentgen-densitometry when density of tested object is compared with etalon, e.g. aluminium equivalent (Wells & Ryan, 2000). Another practical application of the half-value thickness knowledge is shielding/filtration. Protective equipment is an example of added filtration. Filtration allows increasing the average energy of X-ray beams and reduce amount of low-energy photons. It's helpful for radiation dose control. Minimum adequate filtration of the x-ray beam is achievable at the half value thickness which is equal or more than 2.5 mm of aluminium (Bushberg et al., 1994). Both Bremsstrahlung and characteristic radiation are emitted in the anode

Genetically Modified Food Essay Example for Free

Genetically Modified Food Essay In 1973, scientists discovered something that has the potential to change the world we live in forever they discovered Genetic Modification. Genetic modification is exactly what it sounds like it is the modification of genes inside a living organism. This of course could be used on humans or animals but as soon as this discovery was made safety precautions were put into place to stop people using this new technology in the wrong way. The secret to genetic modification of genes lies in the plasmid. A plasmid is a ring of DNA inside bacteria and can be used to change the genetic message inside the bacteria. For example if you were to want to create insulin you would extract the insulin producing gene from the pancreas cell of a human and cut open the plasmid and insert it the gene. This new DNA created is called recombinant DNA. The bacteria would then go on to produce human insulin. Since this is the basis of how this technology works it can also be transferred to foods. Scientists are now looking how they can genetically modify food in the world to make it better and hardier than the food nature produces. Some foods have already been genetically modified and are being grown widely throughout the United States. Crops such as Soya, Cotton, Maize and Potatoes are already modified and sold throughout the country. Scientists have genetically modified these crops to make them resistant to herbicides (weed killers) and to create their own poison that kills pests that eat the crop. These highly advanced crops are more likely to produce food for harvesting than normal crops would. With this new genetically modified food it raises issues about just what can be done with it. Places such as Africa which have lots of drought may find that a crop could be developed that would be resistant to drought and could actually survive the harsh conditions and produce crops. A crop that is being developed right now is rice that contains vitamin A that can easily be absorbed into the body. Since poorer countries have a serious lack of vitamin A this new crop would help them to gain the nutrients they need to be healthy. These two crops could be a huge help to world hunger. More food could be produced and the food would make the people that eat it healthier. However, there cant only be good news about GM food or else it would be put into production throughout the world. Many are concerned that GM crops could have a huge impact on the environment. Many say scientists are playing around with something that they dont understand and could damage wildlife and the environment. Concerns of how the GM crops would affect wildlife are a big concern. It has been found out that the crops that have built in poisons to kill pests could also kill other animals such as butterflies. This could have an impact on the food web that the butterfly is apart of. There are also worries of a superweed being created accidentally by the gene that makes the crop resistant to herbicides. People are worried that this gene could get into a weed and make it resistant to the chemicals that are used to kill it. This would make it very difficult to rid crops of weeds and they could have the potential of spreading across the world. Other worries of GM crops include cross-pollination of other plants with these super crops. Farmers that grow organic food may find that some pollen from a GM Crop has pollinated with their crop and made a new hybrid plant. Overall it would appear that there are both positive and negative aspects to the genetic modification of crops. On the positive side there is the possibility that world hunger could be helped by these new crops. However there are the negative aspects that GM crops could have an irreversible impact on the world and environment in which we live in. If further tests were conducted on how GM crops would affect the world in which we and many other species live, maybe there could be some agreement on how we should go about using this new technology that has been discovered. Eventually genetic modification may be taken to new heights by genetically modifying humans and animals to be stronger and smarter. But hopefully this will not be so because then scientists would really be messing around with something that they are not sure about. This could also have huge impacts on the world.

Free Speech -- Liberty Rights Papers Internet Censorship

Free Speech â€Å"Whoever would overthrow the liberty of a nation must begin by subduing the freeness of speech.† These words were spoken by Benjamin Franklin, one of our nation’s founding fathers, when the United States was still a newly independent country. Free speech, which is defined as the right to express any opinion in public without censorship or restraint by the government, is a subject that is still present in the minds of many people today. At one extreme of the spectrum is a group of folks that do not care the slightest bit about free speech issues and at another end is a group of people who will vehemently fight to protect their right to free speech. In a middle ground, like most peoples’ stance, lay a large group of individuals who only take notice and take action regarding such issues when they become personally affected. Only when a person is confronted directly with someone or something that limits their actions or ability to express themselves do they begi n to realize just how much they take the right to free speech for granted. And not only is free speech threatening issues becoming more common today, but the age at which individuals come across these threats to free speech is getting even younger. It is starting quite early for today’s children as they are becoming well acquainted with perhaps the most widespread but least recognized threat to our free speech, internet content filters. According to the Computer Professionals for Social Responsibility’s (CPSR) Frequently Asked Questions on filtering, a content filter is one or more pieces of software that work together to prevent users from viewing material found on the Internet and is described by the Electronic Frontier Foundation as a software mechanism for... ...ob at actually restricting access to inappropriate material and rather do a much better job at blocking beneficial resources. First and foremost the issue of government-imposed internet content blocking must be addressed. Once a solution to that has been applied, then the use of filters in general can be tackled. The solution to this can best be summed up by the following quote from the National Research Council’s book, Youth, Pornography, and the Internet, â€Å"Swimming pools can be dangerous for children. To protect them, one can install locks, put up fences, and deploy pool alarms. All these measures are helpful, but by far the most important thing that one can do for one’s children is to teach them to swim.† Once parents address the issues through communication with their children, there will be much less of a need for the â€Å"filtering† software on the market today.

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This note presents the mechanical design of the system in question and more experimental findings which support the assumption of the novel model constructed there. Moreover, this note contains first conclusions and preliminary discussions. A system composed of a metallic cylinder filled with pressured air (up to 5 ATM), and a rubber, square sectioned ring, as a seal was Investigated theoretically and experimentally. Under a certain pressure difference (Internal minus atmosphere pressure – p) and external sealing force, the rubber seal is compressed (h) and should prevent air leakage.However, experiments show a continuous, nonlinear decrease in p(t) as a function of time. A few classical (macro) thermodynamic models for predicting p(t), via considering air flow through cracks, have been suggested before, based on [1] but they have failed to describe the profile in question due to the coupled constitutive properties of rubber and a construction that allow the creation of micro- scale â€Å"tunnels† in the rubber-lid interface, through which the air can pass.A novel heuristic model, which assumes a symmetry preserving analogy between the micro-scale air tunnels and the rubber polymer strands is proposed. Thus, polymer equations based on statistical thermodynamics are applied on the alarm streamlines. Using this model, there are four unset parameters whose values are being determined by the experimental profiles, similar to the semi-phenomenological rubber model of Mooney-Rivaling. An excellent correspondence between the model and physical essence of the phenomenon.Many standard trendiest have been tried and failed to describe p(t) accurately, including 3rd order polynomial which has also four parameters. Key-words: – Sealing, Pressure drop, Air leakage, Air-polymer analogy, Polyp-Air, Micro-Macro, Language. Ascribing air flow through cracks are available in [2], [3], but those have to be adjusted to describe air flow through rubber-metal inter face. In the following note we will describe the experiment set mechanical design and the final system configuration itself.Moreover, we will mention some results regarding the experiment. 1 Introduction An air pressure vessel (up to ATM) is composed of a metallic cylinder and a cover, and sealed with a rubber, square sectioned ring, as seen in Fig. L . Under a certain pressure difference (internal minus atmosphere pressure – p) and external sealing force, he rubber seal is compressed (h) and should prevent air leakage. However, experiments show a continuous, nonlinear decrease in p as a function of time for small values of h (up to of the initial vertical dimension – ho).A few classical (macro) thermodynamic models for predicting p(t), by describing air flow through cracks (of heat regenerator for example) , have been previously suggested but they have failed to accurately describe the profile in the following specific setup due to the coupled constitutive property of rubber and a construction that allows the creation of micro-scale â€Å"tunnels† in the rubber-lid interface, through which the air can pass. A few more mathematical and physical models of 2 Experiment Setup 2. Introduction and Targets Consider the axis-symmetric setup where the inner pressure is set to a constant value, which is different from the atmospheric pressure (fig. 1). The â€Å"Force† preventing from the piston to pop up and also causes the rubber seal (black) to be subjected to unsocial compression. Thus, the vertical length – originally ho – decreases to a controlled value h. Once deformed enough, the seal prevents leakage of air from the inside. Note that thanks to the upper airway the outer surface of the seal is subjected to the time measure. . 2. 1 Variables and their measuring methods p – with a computerized pressure gage installed as part of the cylinder.. Ho (free vertical dimension of the rubber sample) – with a microme ter h (current vertical dimension of a rubber sample) – using LIVED that track the displacement of the piston from its free force position. T (time)- by the computer clock. T (the temperature of the gasket or air) – with a thermocouple installed as a part of the cylinder. Only for additional data collecting proposes, not a controlled variable.The main target is to investigate the pressure vs.. Time p(t) profile. The seal's function, is to preserve the pressure difference p=P-Pa between the two gasket sides. We'd like to observe how the magnitude of the initial pressure difference and the controlled deformation influence on the profile. The mechanism of air leakage through the seal is yet to be determined but when diffusion is neglected one can presume that the air flows through the rebuttal interface. Our initial assumption is that air flows through narrow cracks-like interracial passages.The assumption about the diffusion arises from mineral notion about the character istic time of gas diffusion through rubber in various applications, which is much larger than these experiments periods (about 1000 seconds). For example, based on [4], the pressure drop in 1000 seconds via diffusion in an UN-defected aircraft tire having similar pressure difference is 0. 06% at most. There is extensive work on air flow through material cracks. 2. 2. 2 Important Technical Aspects See details in fig. 2 for the following considerations. Deformation needs to be assured.The force is actuated via a fine screw, enables measuring the vertical displacement with a LIVED and control he value to it with satisfying precision (10 microns). The purpose of the center ball is to transfer the pure vertical movement without rotational movement and torsion. Seal eccentricity: the experiment should be designed to assure closing force as uniform as possible, although it'll never be ideal, so it'll be wise to try centering the seal and avoid creating preferable air flow sites due to lack of symmetry in the compression field.In the following setup â€Å"hand tolerance† is satisfying. Starting the â€Å"stopwatch† (time measure): practically, the seal is influenced by the way the pressure and deformation are reached. To overcome this problem, the experiment should be done in a way assuring results independent from the initialization. Experiment was stopped when pressure changes are very small. 2. 2 Course of Experiment Preliminary experiments showed a continuous air flow and pressure drop all along the experiment. The general p(t) profile exhibited â€Å"exponential decay† type of behavior.We shall now briefly describe the experiment variables related issues such as the creation of p(t=O) and h , and the protocol of starting/stopping Force pa 2. 2. 3 The Experiment We measure p as a function of time, and determine owe p(t=O)= pop and h influence this profile. Observe fig. 2 for the actual setup. The first step is deforming the seal. Than, opening the main valve ( not in fig. 2), connected to the supply line, and building the pressure to a desired, stable value (waiting for stabilization is crucial). The secondary valve was then closed and p(t) was than monitored.Figure 1 – Schematic section of the experiment setup. The compressed air is colored with blue. -2- Screw ones on the surface) move finely due to compression and each strand remain attached to its original Junctions. The Junctions are getting closer ND dense and so are the strands in the bulk of the rubber gasket, which were dense enough already to prevent air flow. However, the surface isn't a mosaic of Junctions but more of a blend of Junctions and loose strands – strands connected only to one junction. Had the surface was a lattice of Junctions, the contact mechanic would have been similar to metal-on-metal mechanics.But this is not the case. Due to those loose strands, the surface only embedded with Junctions and between them – an entanglemen t of loose stands, rolled and smeared on the Junctions beneath them, preventing the creation f classic surface contact. In order to understand the air flow mechanism, let's observe hypothetically on a metal-on-metal sealing. Each metal plane has its own surface profile with peaks, valleys and defects where air can flow in and find its way out. The probability of perfect sealing – when one plan's peaks are pressed directly on the other plan's valleys – aspires to zero.Practically, the metal-metal interface always consist paths that the air can use for its escaping. We refer to that situation as â€Å"use of built in paths†. The reason behind the superiority of rebuttal sealing over the metal-metal one is he elasticity and compliance of the rubber. When pressed on the metal surface, the rubber's loose strands and even some of the Junctions and regular strands on the rubber surface fill the valleys of the metal. Since the strands are thin compared to the valley, th ey penetrate the â€Å"built in paths† and force (consider a thick bush in a flowing river).This is the idea behind â€Å"labyrinth† seal -forcing the air to flow in a complicated path in order to reduce pressure leakage. The magnitude of a rubber monomer is about 5 LIVED sail Piston Secondary Valve Figure 2 – the actual setup 2. 3 Preliminary results and Conclusions (t) profile was recorded for different initial pressure differences and rubber deformations. The parameters range is: pop=l [ATM] to 5[ATM], to -0. 2. Preliminary results showed that p(t) graphs were different considerably one form the other for the same initial conditions.It was concluded that the experiment is very sensitive to the rubber gaskets different surface profile over the different specimens. See fig. 4 for details. On the other hand, when repeating the experiment with the same gasket, as long as the experiment is not too long so the rubber won't behave differently due to service, we get similar graphs (fig. 3). Discussion 3. 1 Air Flow The proposed mechanically model of leakage is based on three phases. Phase I includes placing the rubber gasket and deforming it to the set value h. The process is described in figure 5. The polymer macrostructure is composed of strands and Junctions.According to untangled mechanical models [5], the Junctions (at least, the experiment #2,#7 experiment #2 pressure[ATM] 4 3. 5 3 2. 5 2 Figure 3 – 4 experiments with ZEE%. The graphs are similar, with maximum of 0. 2[ATM] pressure difference. The difference is due to inability to reconstruct the same initial conditions and due to service effects. Oho 1 500 2000 time[sec] Figure 4 – pressure profiles in experiments #2, #7. pop?4. 1 EX-O. 148. -3- Aluminum Figure 5 – gasket compression process angstrom, and the strands are generally shorter than the average polymer length, each strand is formed maximum overall length about 5 micron.See [6] for more information about st rands length. However, this is not the end of the story. Recall that the rubber strands are rather flexible, given an energetic air Jet it might deform the strands, move them aside, and create a much more convenient path. Where it is practically impossible in metallic sealing, when rubber-metal is noninsured the air can create its own path and not use the â€Å"built in† paths by default. Of course, the strands are like springs – moving them aside require a transform of the air kinetic energy to potential spring energy.So we stay with this trade-off: creating convenient path where the friction loss is minimal, or maybe use the built in paths with significant friction loss but save the energy of the path creation. The answer will be given by the minimum energy principle. The reasonable assumption is when the pressure p is great, the air is energetic and prefer create a convenient path. As long as p decreases, the path becomes more and more curvy. When p is too small, we cannot talk about paths anymore since the air kinetic energy isn't high enough. Alternately, the air molecules start percolate on their way out (still in the interface, not in the bulk).Our model won't deal with that region. Only the regions with flow paths are in our interest. The latter discussion was proved qualitatively. An experiment assuring its results is in its design stages. Phase II of the experiment is the pressure buildup. We open the main valve, letting air to flow from the supply line to the cylinder. The supply line erasure is controlled and thus raising the pressure inside the cylinder. At this phase, air is pumped in and leaks out at the same time but the influx rate is much greater then the leakage rate.When the level of pressure reaches the desired one, and stables, the secondary valve is closed and phase Ill is being executed. In phase Ill, the air flows out through the two planes described in phase I in a manner described above. 3. 2 Rubber Gasket Behavior cyli nder, and that pressure acts on the already deformed gasket as it wants to expend it. Due to the normal forces, a friction force (FRR) avoiding the gasket from expending. Beneath is a figure showing the process form the rubber point of view using forces diagram on a vertical section.Let's assume a standard friction model. After a certain level of pressure is achieved, the friction force FRR reaches its maximum static magnitude, which means that the rubber is entering the dynamic friction stage. While the pressure continue to increase, the rubber starts increasing its average radius, so the radii difference – outer against inner – and the height are decreasing due to incompressibility. Notice that h does not change – the piston is fixed – but the expansion decreases the ignited of the friction force even more. When maximum p is achieved, phase Ill starts.The pressure begins to drop and the rubber enters the static fiction level again. The friction force co ntinues its decrease until finally it changes its direction and grows back to the dynamical level. Afterwards, the rubber begins to decrease its radius -4- until the maximum-static-level friction force is enough to hold the rubber gasket in place. It is more than possible that before releasing the piston, the final average radius is different than the initial. There is also the possibility of small p and a strong enough friction force that succeed in keeping the gasket in place all over the experiment phases.Important conclusion is that the volume which the air fills remains constant at the beginning and at the end of the experiment. That is, the contraction is happening at the middle of the experiment (if present). In order to check the validity of the previous speculative argument, a videotaped experiment was taken. There, one we can see how the rubber expends and contracts with the pressure (in [ATM] at the background), where the movement is in microscope (it was videotaped using a regular camera. The movement is absolutely seen to the naked eye).

Transformational and Transactional Leadership

Transformational and Transactional Leadership Transformational and Transactional Leadership Thomas J. Kenny CRJ-810 Dec 16, 2011 Many styles of leadership exist in the management world. Most of these approaches are very similar to one another. Two very different styles of leadership are the transactional and transformational leadership styles identified by James Burns in 1978. These leadership styles are almost polar opposites of one another, with employees in the transactional leadership style motivated by rewards and benefits, and employees in the transformational style motivated by their charismatic managers.These two leadership styles, though different from each another, can be very effective tools in the world of policing. Transactional leadership represents â€Å"those exchanges in which both the superior and the subordinate influence one another reciprocally so that each derives something of value. †(Yukl, 1981) This style of leadership can be compared to dangling a car rot in front of someone, or giving officers who write the most tickets steady weekends off. Leaders who use this style give their subordinates something they want in exchange for something that the leader wants.The reward system of leadership used by the transactional leader can also involve rewards or values that are not as easily tangible such as trust and respect. Burns(1978) referred to these values as modal values; â€Å"modal values bond leaders to followers in an attempt to actualize the needs of both parties. † These rewards such as trust and respect may still be given out by low level police supervisors who may not have the authority to give out overtime or authorize special days off.While transactional leadership is concerned with increasing production and motivation through a reward based system, transformational leadership is concerned with making the employee want to succeed. Bass & Steidlmeier (1998) describes this difference as: Transformational leadership is p redicated upon the inner dynamics of a freely embraced change of heart in the realm of core values and motivation, upon open-ended intellectual stimulation and a commitment to treating people as ends not mere means.To bring about change, authentic transformational leadership fosters the modal values of honesty, loyalty and fairness and the end values of justice, equality, and human rights. Transformational leadership contains four components: â€Å"idealized influence (attributed or behavioral),inspirational motivation, intellectual stimulation, and individualized consideration. † (Bass, 1985) These four components can be summed up as that of a charismatic leader. Employees will see the qualities of this charismatic leader and try to emulate them.Bass (1985) describes this emulation of charismatic leaders as: If the leadership is transformational, its charisma or idealized influence is envisioning, confident, and sets high standards for emulation. Its inspirational motivation provides followers with challenges and meaning for engaging in shared goals and undertakings. Its intellectual stimulation helps followers to question assumptions and to generate more creative solutions to problems. Its individualized consideration treats each follower as an individual and provides coaching, mentoring and growth opportunities.Transformational leadership can be very effective in the world of policing, where the leadership exists from the top down. Officers who work for a transformational leader in a police department must â€Å"understand the vision of the department’s direction, appreciate the organization’s potential, believe that the goal of improvement is supported by the entire organization, and support the idea that change is needed. † (Bynum, 2008) Transformational Leadership can be very effective due to the fact that its motivational and inspirational effects can be long lasting and felt by every employee in the organization.Transformati onal leadership encourages its members to be more proactive and more productive without any specific direction or a reward in mind other than that it benefit’s the organization as a whole. With transactional leadership, some of the rewards such as better hours or days off can only be enjoyed by a few of the members. A competition to see who can write the most summonses, with the winner getting better days off, may increase production at first.The benefit of weekends off can not be given to everyone though, and usually only those who receive the reward will continue to produce as much. Transformational leadership might have a difficult time succeeding in an organization such as the New York City Police Department. The NYPD was founded in 1845, and therefore is deeply rooted in traditions and norms. Even the most charismatic leader, brought into the NYPD to institute change and a new direction, is going to be met with extreme resistance.Police Officers, who can tend to be very reflexive at times, might not take well to the idea of being self starting, proactive, and productive for their department. This initial resistance by subordinates usually makes the transformational leadership approach a long term solution to a departments problems. Transformational leadership tends to be more effective that transactional leadership, due to the fact that most of the terms in the reward based system of transactional leadership are defined and tangible.The subordinate is expected to produce a certain amount in order to receive a benefit. This can tend to make the employee cease production once they have met the production requirement. Conversely in transformational leadership the employees are motivated not by a reward, but for the good of the organization as a whole. This motivation can lead employees in a transformational leader organization to produce much more than what is expected of them. The fact that the terms of a transactional leadership arrangement are tang ible also makes it effective for a short term production problem.A precinct with an influx of burglaries, might offer an extra day off to the next officer who makes a burglary arrest. While in the long run they would want the officer to always be vigilant for burglary arrests, the added benefit of a day off will have additional motivational effects. Transformational leadership is most often effective in organizations that have a need for change, or that have undergone a recent crisis. Transformational leaders tend to have uniting qualities, which can bring an organization out of mediocrity.Adolf Hitler, who was a tremendously charismatic transformational leader, was able to bring Germany back from the brink of total collapse and financial ruin that it was in following World War I. Transformational and transactional leadership can be two of the most effective styles of leadership in policing. By using the transformational leadership style, police managers can foster an group of proac tive and motivated police officers, who want to achieve greater results for the good of the team.By using the transactional leadership approach, they can achieve great results exchanging rewards and benefits with subordinates for increased production. Using a combination of these two approaches to police leadership should lead to great success. References Bass, B. , & Steidlmeier, P. (1998). Ethics, Character, and Authentic Transformational Leadership. Vanguard. edu. Retrieved December 10, 2011, from www. vanguard. edu/uploadedFiles/Faculty/RHeuser/ETHICS,%20MORAL%20CHARACTER%20AND%20AUTHENTIC%20TRANSFORMATIONAL%20LEADERSHIP. df Bass, B. M. (1985). Leadership and performance beyond expectations. New York: Free Press ;. Burns, J. M. (1978). Leadership. New York: Harper & Row. Bynum, R. (2008). Transformational Leadership and Staff Training in the Law Enforcement Profession. The Police Chief. Retrieved December 10, 2011, from www. policechiefmagazine. org/magazine/index. cfm? fuseacti on=display_arch&article_id=1422&issue_id=22008 Yukl, G. A. (1981). Leadership in organizations. Englewood Cliffs, N. J. : Prentice-Hall.

Learn How to Use the French Preposition Par

Learn How to Use the French Preposition Par The French preposition par means through, by, or per in English. It is used to indicate the manner in which something is done, the reason behind an event, the direction something moves, or the amount of something per some unit of measurement. In everyday conversation, you might use par when giving directions to someone or to describe how an event occurred. Examples of Par Je suis sortie par la porte.I left through/by the door.Jai appris la verità © par hasard.I learned the truth by accident.Il la obtenu par la force.He obtained it by force.Je lai envoyà © par la poste.I sent it through the mail.Il a jetà © les dà ©chets par la fenà ªtre.He threw the garbage though/out the window.Il gagne 500 euros par semaine.He earns 500 euros per week.Par is often used to introduce the agent in the passive voice:Ce livre, à ©crit par Voltaire...This book, written by Voltaire...La tasse a à ©tà © cassà ©e par un chien.The cup was broken by a dog. Verbs With Par As with prepositions in English, there are some instances when a verb will also require using par in sentence construction. Some of the most common French verbs are: arriver  par  Ã‚  Ã‚  to succeed through/bycommencer  par  Ã‚  infinitive  Ã‚  Ã‚  to  begin by ___-ingfaire  par  (la pitià ©,  lamour)  Ã‚  Ã‚  to do out of (pity, love)finir  par   infinitive  Ã‚  Ã‚  to end up ___-ing / to finally do somethinghabiter  par  ici  Ã‚  Ã‚  to live around herejurer  par  Ã‚  Ã‚  to swear byobtenir  quelque  chose par  Ã‚  Ã‚  to obtain something byprendre  quelquun  par  (la main)  Ã‚  Ã‚  to take someone by (the hand)ressembler  par  Ã‚  Ã‚  to resemble due tosortir  par  (la fenà ªtre)  Ã‚  Ã‚  to leave by (the window)venir  par  (la cà ´te)  Ã‚  Ã‚  to come along/by (the coast)