Smoking Cigarettes Essay Example for Free

Smoking Cigarettes EssaySmoking cigarettes is harmful for umpteen reasons. It is not only harmful to the human body but also affects the environment. This is because of many chemicals and substances that produce this hazardous product.There are many causes of gage cigarettes. First of all, teenagers smoke because they want to be fit, and avoid gaining weight as smoking cool off hunger. Them they see their friends smoke and think it makes them look cool, be independent, and feel no tension and worries. The main cause of smoking is Nicotine which is an addictive and harmful substance contained in cigarette. People smoke cigarettes when they are depressed, lonely, or bored, and they help them to reduce the stress.Smoking is harmful to the human body, and it affects the eyes, mouth, throat, lungs, heart, stomach, and pancreas. It also causes cancer. The effects of smoking to the eyes is smoker take for two to three times greater chance of developing cataracts, which leads to bli ndness. The Lungs and heart also are affected by smoking. Smokers are at a graduate(prenominal) risk of lung cancers, and smoking causes hardening of the arteries. The Stomach and pancreas also get affected from smoking. Smokers experience more coughs and colds as compare to the non-smoker. Any pregnant woman who is in habit of smoking cigarettes will have an increased risk of having an abnormal baby.Smoking is like a slow death. Besides affecting oneself, it also has a negative impact on the other people are smokers who are known as second hand smokers. Many people who start smoking have a family member or close friend who smokes. Smoking reduces ability to do things, such as sports and exercise. The tar in cigarette covers up alveoli, which helps a person to breath.Some people began smoking to showing off, or some wanted to enjoy it. Smoking is a habit which person develop difficult to quit. Always try to avoid what your friend say about smoking. We need to give more attention to the effects of smoking to the non-smokers because they get more serious effects than thesmokers.

Types of Vacation Essay Example for Free

Types of Vacation EssayThere are six types of vacation a person can choose from. A vacation can sozzled spending time with loved cardinals, haveing new people, trying something new, educational experiences, or helping others. Deciding on the type of vacation to go on can be tricky, especially when determining where you necessity to go and why.One type of vacation to go on is to celebrate a romance, which can entangle anniversaries, honeymoons, or a couples retreat. The purpose of this is to give couples a chance to relax and revive their love. This could be anywhere as long as youre with the one you love, whether its a cruise to Jamaica or to the city love, Paris.Another type is a family vacation where the whole family can relax and spend time together. The most common destination for family vacations is theme parks geared toward kid friendly activities, such as Disneyworld in Orlando, Florida Six Flags and Sea World.Not everyone is married or wants to go on a vacation with their family, and for these people there are the singles getaways. These vacations allow singles a fun way to travel and meet new people while exploring the world. There are a variety of trips such as cruises, and adventures where singles can hike through a jungle in Costa Rica, or visit the mysterious Machu Picchu in Peru.Many people wish they could go somewhere or do something they have eer wanted to. A dream destination vacation allows people this opportunity to go on vacation to that specific place. This could be anything with anyone, such as the nightlife in Rio de Janeiro, climbing Mount Everest, or visiting the Seven Wonders of the World.There are also many who travel for work or educational reasons. They might want to learn a new language or culture. Some schools offer programs that allow students the opportunity to study overseas and work abroad such as the University of Manitobas World W.I.S.E. (Work, Internship, Study and Exchange) program. There are also those who tra vel for work such as news reporters who must travel to various places just about the globe.There are many reasons a person can take a vacation, whether to relax, get away or spend time away with ones you love.

Colonisation of Perennial Ryegrass by Endophytic Bacteria

Colonisation of Perennial Ryegrass by Endophytic Bacteria2. Materials and methods2.1. cooking of culture media food agar-agar (NA) NA (Oxoid, Basingstoke, Hants, UK) was prepargond by weighing out 28g of nutrient agar powder and dissolving in 1L of deionised H2O, by warming on a hot cuticle. This was autoclaved at 121C and 15psi for 15 minutes. The medium was because aseptically dispensed in sterile petri dishes and allowed to solidify.Sucrose glutamate agar (SGA) SGA was prep bed by dissolving 20g of sucrose, 2g of glutamate, 15g of agar bacteriological (Agar No.1) and 1g of K2HPO4 in 1L deionised H2O. This was autoclaved as outline above. The medium was allowed to composed to approximately 60C at which 5ml of MgSO4 and 1ml of kanamycin was aseptically added to the medium using a Nalgene syringe Filters. The medium was thusly poured into petri dishes and allowed to solidify.Nematode growth medium (NGM) 1L of NGM was prepared by dissolving 3g of NaCl, 17g of agar, and 2.5g of peptone in 975ml of deionised H2O in a Duran bottle. This was autoclaved as outline above. The media was allowed to cool for 15 minutes at which 1ml of 1M CaCl2, 1ml of 5mg/ml cholesterol in ethanol, 1ml of 1M MgSO4 and 25ml of 1M KPO4 buffer were added aseptically in a Duran bottle. The bottle was swirled to ensure the medium was mixed properly and then aseptically dispensed in sterile petri dishes and allowed to solidify.2.2. Culturing entomopathogenic nematodes (EPN)9cm perk paper was placed in sterile petri dish and 1ml of stock nematode suspension was pipetted onto filter paper. Five stand up Galleria mellonella (wax moths) were placed onto petri dish and seal of approvaled with parafilm (Figure 1). The dish were kept in a dark and observed daily for the insect mortality. one time the G. mellonella were dead they were transferred to whitened traps.Figure 1 Galleria (wax moth) baiting technique.2.3. Preparation of white trapsWhite traps (White, 1927) were prepared whic h the lid of a small petri dish (35x10mm) was placed on purloin of the base and placed in a clear tub, this was then cover with filter paper. 30ml of water was added to the plastic container just to allow absorbing through the filter paper. The dead G. mellonella was placed on the moist filter paper and it was covered and placed in dark for 7 to 14 days (Figure 2). The white traps were observed daily for emergence of infective juveniles (IJs) by using stereoscope (Figure 3). Whenever the water around the stage became densely concentrated with nematodes, the water was decanted into a container and replaced with another 30ml of deionised H2O. The nematodes were stored at 4C in 25ml of distilled water until pauperisationed for use.Figure 2 Galleria larvae on white trap.Figure 3 Galleria larvae chthonic stereoscope (20X).2.4. Culturing Caenorhabditis elegans (C. elegans) on NGM (Couillault. C, 2002)A stock culture of C. elegans was cultures from a previous stock of C. elegans. In a laminar air flow, the plate was divided into equal sections. A sterilized scalpel was use to cut sections from the stock culture to the centre of a fresh NGM plate (Figure 4). The plates were sealed using a strip of parafilm and stored at room temperature or wrong incubator at 21C for 3 days. The petri plates were observed regularly using stereoscope (Figure 5).Figure 4 Culturing C. elegans on NGM (Chunking method).Figure 5 Observation of C. elegans under stereoscope (20X).2.5. Culturing of bacterial endophytesThe endophytic bacterial strains used in this lease were provided by IT Carlow stock collection and have been labelled with gfp (green fluorescent protein). The Pseudomonas strains used were F113, L321 and L228.1L of Nutrient stemma (NB) was prepared and 10ml was pipetted into Mc Cartney bottles and autoclaved. The Pseudomonas strains of L321gfp, L228gfp, and F113gfp were inoculated aseptically using a wire loop and incubated at 30C for 24hours in an orbital shaker incub ator. The gfp strains in the nutrient broth were then streaked onto fresh non contaminated nutrient agar and SGA in duplicate for all(prenominal) of bacterial strains, using the quadrant streaking method. All plates were covered with parafilm, labelled and incubated at 30C for 24hours. A gram stain, catalase test, oxidase test, and observation of morphological characterisation were carried out for the Pseudomonas strains of L321gfp, L228gfp, and F113gfp.2.6. Quantification of nematodes S. feltiae and C. elegansThe stock suspension of nematodes was divided into 50ml samples. one Cl of the infective juvenile suspension of each sample was pipetted using micropipette onto a counting tray and tally counter was used to count for nematodes under stereoscope (Figure 6). Once they were counted, the sample was discarded and washed with deionised H2O. This was repeated 10 times and the average number of nematodes was calculated.Figure 6 run chamber containing suspension of nematodes.2.7. Preparation of filthiness samples2500g of colly was autoclaved as outlined in section 2.1. The soil was dried in an oven at 55C for 24 hours. The soil samples were prepared by weighing out 90g into plastic cups (Figure 7) and temporarily covered with tin foil to prevent any contamination.Figure 7 Each plastic cup contains 90g of soil.2.8. Preparation for Sodium alginate beads (Bashan, 2002)The microbeads stock suspension were prepared by dissolving 10g of Sodium alginate in 500ml of deionised H2O , 10g of Calcium Chloride in 500ml of deionised H2O, and 5g of powdered skimmed draw in 50ml of deionised H2O. All components were autoclaved separately and the skimmed milk was autoclaved totally for 10 minutes. The functional solution was prepared from the stock solutions as follows 5ml of skimmed milk, 15ml of sodium alginate and 5ml inoculum. The components of the working solution were poured into a sterile petri dish and mixed using a sterile rod. Parafilm was used to plug the sp out of 20ml syringe, the alginate mixture and grass inseminates were subsequently added. The parafilm was then removed and a sterile rod was used to ensure the coated seeds dropped out individually, into a beaker containing Calcium Chloride on a magnetic stirring plate (Figure 8). The beads were washed at least three times with sterile distilled water and stored in a sealed petri dished until needed for use.Figure 8 Beaker containing Calcium Chloride on a magnetic stirring plate.2.9. Isolation of bacterial endophytes from alginate beads (Bashan, Y and Levanony, 1989)In order to isolate and enumerate bacterial endophytes from microbeads seed coating. Six alginate beads containing individual bacterium were dissolved in 10ml of 0.25M Potassium Phosphate buffer in a test tube and incubated at 30C for 24 hours. The bead was then shaken on a vortex for 5 minutes to break down the alginate. Using a resultant dilution method, 1ml of bead samples containing bacteria was serially diluted i n 9ml of sterile ringers from 10-1 to 10-10 (Figure 9) this was carried out onto SGA in reproduce and incubated at 30C for 24 hours.Figure 9 Most probable number (MPN) method/Serial dilution method.2.10. Isolation of bacterial endophytes from engrafts (Keogh, E, 2009)Each plant was removed from pots and excess soil was removed. Three samples were taken from each plant (stem, root, and rhizosphere). The stems and roots were surface sterilised with 1% of sodium hydrochloride and washed twice with sterile water. The stems and roots were cut with sterile scalpel and crushed with a mash and mortar in 5ml of Ringers solution. 100l of suspension was added to 900l of sterile Ringers in 2.5ml microfuge tubes. The serial dilutions were carried out and the resulting dilutions of 30l were then pipetted onto SGA in triplicate and incubated at 30C for 24 hours.3. Results3.1. Characterisation of bacterial endophytesThe classical approach to bacteria identification involves preliminary microsco pic examination of the gram-stained preparation for its potpourri which would later form the basis for the selection of biochemical test to be performed to test their identity. Table (Table 1) and figures (Figure 10(a) to (f)) below shows the characterisation for each strain of endophyte.Figure 10 Characterisation of bacterial endophytes. (a) Culture plate observation for F113. (b) Microscopy examination for F113. (c) Culture plate observation for L228. (d) Microscopy visualisation for L228. (e) Culture plate observation for L321. (f) Microscopy examination for L321.3.2. Counting of nematodes S. feltiae and C. elegansThe number of nematodes was counted per well in four weeks time (Table 2) and a chart (Figure 11) was produced comparing the S. feltiae and C. elegans. This was repeated 10 times and the average number of nematodes was calculated.Table 2 Quantification of nematodes.Figure 11- Comparison between No. of IJ/100l with the time of S. feltiae and C. elegans.3.3. Soil samp les inoculationIn order to make sure the soil samples give up from contamination, the serial dilutions were carried out and the resulting dilutions of 30l were then pipetted onto SGA in triplicate and incubated at 30C for 24 hours (Figure 12). The results indicated no growth in the soil samples.Figure 12 No growth in the soil samples.3.4. Isolation of bacterial endophytes from alginate beadsIn order to isolate bacterial endophytes from alginate seed coating, the beads were plated onto SGA and incubated at 30C for 24 hours. The results indicated that fluorescent which present of green colour pigment (Figure 13).Figure 13 SGA changed to green colour.3.5. Colonisation and enumeration of endophytic bacterial within plant tissuesInoculated never-failing ryegrass (Lolium perenne) was allowed to grow for 4 weeks (Figure 14) before sampling took place. Total bacterial tribe of gfp expressing were determined for each of the tissues examined. Endophytic bacteria are considered to be thos e isolated from the internal tissues of surface sterilised plants. However, it is difficult to determine whether an organism is truly endophytic or merely a survivor of the surface sterilization process. To ensure that the sterilisation processes were adequate, the sterilised tissues were pressed against the surface of a sterile SGA plate and samples of the third water rinsing were also plated onto SGA plates (Figure 15). Bacterial counts (Figure 16 and 17) on these plates were always between 10-1 to 10-4 CFUs per ml (Table 3 and 4), which was considered to be a good indication that the surface was successfully sterilised. However, under epifluorescent microscopy, the gfp expressing from inoculated plants. Pseudomonas species strain L321 was detected only in the rhizosphere and the interior root tissues of inoculated plant (Figure 18(a) and (b)).Figure 14 Lolium perenne was allowed to grow.Figure 15 Bacterial count on SGA platesTable 3 home counts on Pseudomonas strain of L321.F igure 16 Bacterial counts between S. feltiae and C. elegans.Table 4 Plate counts on Pseudomonas strain of F113.Figure 17 Bacterial counts between S. feltiae and C. elegans.Figure 18 Visualisation under epifluorescent microscope. (a) L321gfp bacteria (400X). (b) L321gfp bacteria (100X).4. DiscussionBacterial colonisation of the internal tissues of plants has been described in most all plant species examined so far. Although many of these bacteria are phytopathogenic, a considerable number have also been found that colonise the plant without cause disease. Such bacteria are referred to as bacterial endophytes. Colonisation may take place at the local tissue level or end-to-end the plant, with bacterial colonies and biofilms residing latently in the intercellular spaces and inside the vascular tissues. This project describes the isolation, identification and colonisation efficiency of perennial ryegrass by gfp labelled bacterial endophytes. Furthermore, this study has shown the successful colonisation of perennial ryegrass by three endophytic bacterial strains under controlled conditions. The Pseudomonas strains, L321 demonstrated efficient colonisation resulting in eminent population numbers within the plant tissues. This experiment shows that the L321 bacteria endophyte worked successfully with the C. elegans to increase the plant colonisation. In this project, L228 was discarded due to the lawns were really poor and did not fluorescence very well so the experiment carried out only with L321 and F113. During the characterisation of bacteria endophytes, the results were obtained which the genus Pseudomonas appeared in Gram negative bacilli motile by polar flagella. In addition, in catalase test shows positive formed the bubbles when comes into contact with Hydrogen Peroxide. On the other hand, the results show that they are oxidase producing which will be oxidised to deep imperial colour. Also, when nematodes had been put on plates and timescale had be gun it was noticed that some plates start to dry out which may be due to the media drying out so to overcome this this, the plates have to seal with parafilm to prevent from dry out. Furthermore, other notice when the plates rinsed with water, I noticed crystals formed in the media and this may be due to the temperature problem. Generally in the experiment there is no physical quantity can be measured with perfect certainty there are always errors in any measurement. For example, the systematic errors are due to poorly calibrated instrument observational for example, errors in judgment of an observer when reading the scale of a measuring device to the smallest division.5. ConclusionIn conclusion, this study has shown the successful colonisation of perennial ryegrass by three endophytic bacterial strains under controlled conditions. The Pseudomonas strains, L321 demonstrated efficient colonisation resulting in high population numbers within the plant tissues. Hence, none of the intr oduced strains showed any signs of pathogenicity towards their host plant and others tested. Many studies have shown that the colonisation levels in field trials are slight successful than those in laboratory trials. This is probably due to increased microbial competition and less favourable environmental conditions. Therefore, additional long-term field trials need to be carried out in order to gain a better understanding of the colonisation pattern and population dynamics of endophytic bacteria in the perennial ryegrass. If time permitted future work would include, the carrying out of plant biomass which is a time consuming method that involves drying of cells and to perform by weighing the dry and fresh weight of each plant.6. ReferencesBrown, R.H. and Kerry, B.R. (1987). Principles and Practice of Nematode Control inCrops. Academic Press, Sydney. 447 pp.Evans, D., Trudgill, D.L. and Webster, J.M. (1993). Plant Parasitic Nematodes inTemperate Agriculture. CAB International, Wal lingford. 648 pp.Luc, M., Sikora, R.A. and Bridge, J. (2005). Plant Parasitic Nematodes in subtropicaland Tropical Agriculture, 2nd edn. CAB International, Wallingford. 871 pp.Mai, W.F. and Mullin, P.G. (1996). Plant Parasitic Nematodes. A Pictorial Key toGenera, 5th edn. Comstock, London and Cornell University, Ithaca. 276 pp.Ahmad, F., Ahmad, I., Khan, M.S. 2008. Screening of free-living rhizospheric bacteria for their multiple plant growth promoting activities. Microbiol. Res. 163, 173-181.Barraquio W L, Ladha J K, Watanabe I. Isolation and identification of a N2 fixing Pseudomonas associated with wetland rice. Can J Microbiol. 198329867873.

Look At Transmission Control Protocol Information Technology Essay

Look At infection Control Protocol Information Technology EssayTransmission Control Protocol is one most reliable , fede dimensionn oriented communicating communications protocol utilize in the internet traffic .The main aim of this partition is to conduct a research on transmission see protocol friendly protocols and find a desirable answer to the questions like the births of transmission control protocol that are non suitable for real time multimedia system system act, TCP friendly everyplace-crowding authorization for non-TCP application etc.I. Features of TCP not suitable for real time multimedia application.The uses of multimedia applications are increasing day to day in the internet traffic. In recent future it is sure that the real-time multimedia applications increase rapidly and train up a considerable portion of the total internet band comprehensiveness. TCP is full duplex, link oriented talk protocol that is used for transmitting selective information that mainly focuses on the accuracy of data. But some features of TCP are not suitable for real time multimedia application which includes the following.Reliability done RetransmissionSince TCP is a reliable protocol it uses error control mechanisms like retransmission when an error occurs. Retransmission delay is one of the most important problems in multimedia application for TCP oriented connexion. This retransmission is useful in traditional application such as http, FTP, telnet etc which require the loss free data transfer between the communication media. In the case of multimedia application in that location is an massive emission of data into the entanglement especially in the case of video. This will cause meshing over-crowding, since TCP is a reliable protocol it will reduce the windowpane size and data emission tempo to get out of this over-crowding. The retransmission causes lengthwise rotational latency which is not suitable for real time multimedia applications where the receiver needs the data at the same time when the sender sends it.Congestion controlIn TCP, the available bandwidth can be monitored by using over-crowding algorithm which uses the transmission rate for the manipulation results in some deliberate waste. In the cases where in that respect is no congestion, TCP congestion control fairly shares the available bandwidth. Over shorter time scales, the TCP instantaneous rate just looks like a saw- tooth. The cycles are between periods of additive increase separated by multiplicative decrease (AIMD). This rate fluctuation is not suitable for multimedia stream application because it affects their flat functioning.Socket based application programming interfaceThe sockets based application programming interface does not support multihoming (a technique to improve the reliability of internet confederation of an IP network). This result in an application can use only a single IP address to a particular TCP connection with another h ost. In an occasion where the interface associated with that IP address goes down which result in the connection loss and reestablishment. This is not suitable or multimedia applications like VoIP.TCP does not support multicastingIn most of the multimedia communication like audio and video conferencing, the network traffic will be high and large(p) amount of data flow across the network. In such situations data are transmitted by using multicasting techniques between the sender and the receivers. But TCP does not support multicastingTCP does not support time stamping.The major problem faced in real time multimedia applications like video and audio conferencing is the jitter. The major solution for the problem associated with jitter is the use of time stamps. The timestamp at each tract shows the time at which each computer software is produced when compared with the previous one. So that the receiver k in a flashs when each packet is to be played. But unfortunately TCP does not fork out support for time stamping.TCP is connection orientedThe TCP is connection-oriented protocol. In this first a connection is established between the source and the destination before data transfer. The main disadvantage of this connection oriented protocol in real time communication like VoIP is the consumption of resources spent setting up the call. This connection oriented feature discombobulate a superficial overhead during connection establishment because it is time taken during certain occasions. Time overhead is not suitable for real time multimedia applications.Do not require full duplex transmissionIn TCP, the processes that reside in the internet establish a reliable serial communication path and exchanges full duplex stream of bytes. The processes within the communication are identified by the IP addresses. The full duplex connection is not imperious for most of the multimedia application. The best example is TV broadcast over LAN in most situations it uses simpl ex continuous media connection.AcknowledgementIn TCP, there is the need of acknowledgement during the transmission of each packet. The positive acknowledgement causes overhead because all packets are sent with a fixed rate. This is not suitable for multimedia.II) UDP is TCP Unfriendly protocolIn order to discuss about this topic we need to describe the basic functions of the TCP and UDP. In order to clearly desexualize about the TCP, UDP unfriendliness we need to understand the basic concepts in detail. With the change magnitude use of real time applications internet users looking for more reliable protocol that provide more faster medium for audio and video.Since TCP is a reliable protocol it has the capacity to reduce the amount of data loss, noise and out of sequence data. TCP uses connection based communication between the communicating hosts. This connection based feature of TCP helps in the guaranteed delivery of the packets. It has flow control and congestion control.In th e case of UDP, it is unreliable. There is no guarantee for packet delivery and for the sequence. In this protocol there is no connection establishment before the communication starts and it sends the data according to its availability.In real-time communication (for audio or video), both the communicating ends look for speed rather than accuracy. The connection less feature of UDP, that sends the data when they are available and not try to resend once there is an error or packet loss made UDP much faster than TCP. This increased speed made more popularity for UDP in blow media over internet.When compared to TCP the UDP has a main drawback, since UDP continuously sending packets through the network without considering there is congestion on the network. It does not take any measures to reduce the congestion in the case where congestion occurs. But TCP make use of the congestion control mechanisms like reduce the transmission rate. Since UDP does not make use of any congestion contro l algorithms when congestion occurs this tend to take the utilisation of the available bandwidth over the internet. For this reason UDP is known as a TCP unfriendly protocol. According to the opinion of Ross (2005, p.198) in his book Computer Net on the job(p) specifies that UDP is the most commonly used protocol for multimedia application such as Internet phone, real-time video conferencing and streamed of audio and video. So in order to overcome these problems of congestion controls with UDP and improves the band width utilisation and also a fair towards competing TCP connection result in the development of new technology called TCP friendly technique. With the increased popularity of the streaming media the UDP traffic becomes a problem for the internet as a whole.III) TCP Friendly congestion control protocolsThe popularity and development of internet leads to the extensive use of real-time multimedia applications like video conferencing, chatting etc. All these applications make use of non congestion controlled protocols like UDP for transmitting continuous video, audio through the network. This type of non congestion controlled traffic is called unresponsive flows. The major feature of the unresponsive flow is that they do not reduce their load on the network when there is a packet loss. They continuously transmit the data through the network at the rate with which is encoded without bothering about the network congestion. This type of UDP traffic causes traffic congestion in the network as well as it produce an extreme unfairness towards the network. In order to solve these problems, we need to improve the UDP for proper bandwidth utilisation, reducing loss ratio and also produce a fair towards the competing TCP connection and this is called as TCP Friendly. In this section we are discussing about the congestion control mechanisms used by TCP friendly protocols like TFRC and TFMC.TFRC (TCP-Friendly Rate Control)TFRC is mainly defined as a congestion cont rol mechanism for unicast flows in the Internet. TFRC is evolved from TFRCP protocol and it is mainly used for unicast communication but sometimes it is used for multicast communication with some modifications. The lower variation of throughput over time makes this much more suitable for telephone or streaming media and which has a smooth sending rate.TFRC uses equation based congestion control for unicast traffic. In this mechanism it explicitly place its sending rate as a function of the measured rate of loss events where the loss events contain one or more packet dropped within a RTT. As it follows the equation based congestion control, TFRC directly make use of the TCP throughput equation which makes it possible to compete fairly with TCP. The following is the throughput equation used in the TFRC for congestion controlIn this equationX is the transmit rate in bytes/second.S is the packet size in bytes.R is the round excursionist time in seconds.B is the no of packets acknowled ged by a single TCP acknowledgement.t_RTO is TCP transmission timeout value in seconds.The general working of the TFRC congestion control mechanism as followsAs the first tread the receiver calculate the loss event rate and gives this information back to the sender. using this data the sender calculates round-trip time (RTT).Using this loss event rate and RTT, calculate acceptable transmit rate using the TFRC throughput equation.Finally the sender adjust the transmission rate to match the calculates rate.By using the receiver based mechanism TFRC is well suited for applications like the sender are a large server handling many concurrent connections and receiver is has more memory and CPU cycles available for computation.TFMC (TCP friendly Multicast Congestion Control)TFMC is the single rate congestion control scheme for multicast transmission. TFMC is single rated simply means that the receiver experiencing worst network condition will adapt to the sending rate. It has relatively l ow variation of throughput over time, which is suitable for applications that require a smooth sending rate like video streaming.The general working of TFMC congestion control as followsFirst step is the calculation of loss event rate and RTT by the receiver. By using this information with the help of TCP throughput equation the receiver derive a TCP friendly sending rate. In order to prevent feedback implosion at the sender the feedback is supplied only to a subset of the receivers using feedback suppression mechanism. In the receiver side the feedback is not suppressed and it calculates the transmission rate and gives it to the sender. This report has two main purposes, it helps to calculate the RTT for receiver and give the appropriate transmit rate for the sender.IV) TCP friendly congestion control for non-TCP applications.There are many studies conducted on TCP friendly congestion control for non TCP application. The congestion control mechanisms are used to fulfil the followi ng aimsUse of congestion control mechanisms help the applications to use the bandwidth more efficiently and thus increases the performanceThose applications which adapt to the network can easily make use of the wider bandwidth and more useful of the InternetCongestion Control algorithms helps to reduce the Congestive Collapse ie the situation in which network performs a little work due to the over utilisation of network links.There are a number of TCP friendly congestion control mechanisms are introduced now a days which include end-to-end schemes and hop-by-hop mechanism. The end- to- end mechanism consist of AIMD window based and rate based protocols and hop-by-hop consist of rate based hop-by-hop mechanism. The end-to-end congestion control mechanisms are necessary for responsive as well as unresponsive flows which reduce the traffic load when packet loss occurs. In rate based hop-by-hop congestion control scheme it matches the sending rate of the connection to the service rate o bserved at the downstream node.In window based AIMD schemes which utilises the increased and decreased congestion window of the sender. This mechanism has some advantage as well as some disadvantages. The major advantage is that it is familiar, presumable in the field of fairness, stability, oscillations and other properties. The disadvantage is that it has more abrupt changes and oscillation in sending rate which is not suitable for real time streaming application.In rate based AIMD schemes, the most common examples are RAP (Rate Adaptation Protocol) and LDA (Loss-Delay based Adjustment Algorithm). The LDA is mainly proposed for adapting the transmission rate of multimedia applications to the congestion level of the network. It mainly relies on end-to-end Real Time transport Protocol (RTP) and its control protocol (RTCP) for feedback information. The major difference between rate rendering schemes and window based schemes is that the latter is not ack-clocked. The main advantage is that the adaption of the sending rate deduces the no of oscillations and also helps to reduce the heavy traffic in real-time applications.

Stress Relieving Techniques for Organizational Stressors

Stress Relieving Techniques for Organizational StressorsU resembling Mukerrem ATAWhy this article?This article studies the prove that we ar commonly facing in the organizations. We spate say that nowadays, managers ar complaining around the reluctant workers and non-efficient productivity. With this article we atomic number 18 going to examine this topic. Lets think about this, what do we understand with the expression called organizational stress?According to Lazarus and Folkman (1984), organizational stress is a result of the interaction between an employees personal characteristics, their work environment, the solution expected from them, and their coping ability. An important part of our daily life is passing at work. Stresses that we experienced at work are definitely related to working conditions. However, there are individual factors, such as Difficulties of dealing with stress due to personality traits, family issues or some other sources of social support, and the r oles played in other areas of life. This are definitely causing high tension of stress. On the other hand, the stress at work is reflecting other spaces of the person. We can control the working conditions to a certain extent we have to focus on the idea that we can deal with these conditions first, rather than setting new targets even if we are in unmanageable conditions. So in this article we can find some help to form stress issues.Relation with recent topic?Emotions and moods are not same things but they are related to each other. We cannot separate them sharply but we cant tell that theyre definitely different. Stress stays between this two conditions. sometimes you can express it like emotion, but sometimes it is hard to be expressed. Stress are also changes a lot according to type. They can depart long such as moods or takes a short duration such as emotion. We call the long-duration stress as apprehension. Organizational stress are aroused by some specific situation such as Concentration difficulty, instability, constantly evaluating the situation negatively, anxious and quick thinking and constant concerns. advanced life is full of challenges, skirmishs, demands and tasks to be trained. For many people, stress has now operate a regular part of life. Stress is not always bad sometimes it can motivate us to do the best. Most of the time we can do better while we are in under pressure. But if we are consistently in an emergency, our body and mind will pay for it with a stress and at the end as an anxiety. So we should practice more to solve and get over.Empirical Article- What are the variables? How theyre measured? What was the sample size? What method was used for needing data?There were 2 hypothesis H01 Organizational stressors and stress relieving techniques are independent of each other. H02 Organizational stressors stress relieving techniques have no relationship with demographic variables.In this exploration there were 118 representative s and 39 of them were female and 79 of the workers were males (Samples). This workers joined this questionnaire from different employment sectors and from different cities in India. Sampling method was utilized as a part of the article, which were chosen through importance inspecting. (Chandra Kant, N. R., Pradhan, S., 2016). The data collection was done by self-report questionnaire. Stress relieving-techniques were likewise utilized by respondents to accumulate data about existing stressors at work. For the Variables ID Stress has various measurements. Face-to-face-in-depth interviews were held to collect information about stress-relieving techniques and to understand existing stressors initially. This existing stressors by employees were noted one by one. 25 interviews carried out in Pune and Bangalore.What is important finding/ except that you feel has helped you understand more about management or that you think would most help managers in organizations?In the article, you can see a fundamental negative correlation between work and pressure, which indicates that stresses is more frequent in permanent employees. Job pressure and family status have a significant validatory relationship i.e. the work pressure is high in the people who lives in common families. The role conflict has a significant positive relationship with periodic income, that is, the increase in monthly income increases the stress of role conflict. We can also say that there is a significant negative correlation between medical specialty and work situation. Music and Situation shows that employees who are primarily permanent and living in core families use Music as a stress-softening technique. This shows that the employees in the conflict role at the task level use Music as a stress-relieving technique than other techniques. Workers with job insecurity use Relaxation to loose their stress and employees without adequate support tries to socialize.In my perspective, Emotional intelligen ce is also a big necessity in business life. People with high delirious intelligence have a strong empathy ability and are reconciled. Target-minded thinkers can raise awareness, manage stress easily, and control their anger. They insist with knowing what they can do, they can work together with any type of team and motivate the team to increase the success. People with high EI become ideal managers and such people become ideal employees. At the same time they might be loved by the people around them. Stress and anxiety are always seen when you get word at the reason of each disease. For this reason, it is necessary to get rid of the anxiety before it becomes clear without accumulating sadness. If you control Emotional Intelligence you deal with the stress and anxiety in long term.Brief Description of the journal.CLEAR International Journal of Research in Commerce Management. Mar2016, Vol. 7 Issue 3, p93-98. 6p.423850 Service Establishment Equipment and Supplies merchandiser Who lesalersAuthor AffiliationsResearch scholar, symbiosis international university, MulshiConsultant, homoeopathic psychiatrist, PuneConsultant psychologist, Fortis hospital, BangaloreReferencesCHANDRA KANT, N. R., PRADHAN, S. (2016). STRESS RELIEVING TECHNIQUES FOR ORGANIZATIONAL STRESSORS. CLEAR International Journal Of Research In Commerce Management, 7(3), 93-98.

Aggregate Demand and Aggregate Supply :: Economics

Topic 12 totality ingest and Aggregate Supply-----------------------------------------------1. Introduction2. Three Key concomitants about Economic Fluctuations2.1 Fact 1 Economics Fluctuations ar Irregular and Unpredictable2.2 Fact 2 Most Macroeconomic Quantities Fluctuate Together2.3 Fact 3 As return Falls, Unemployment Rises3. Explaining Short-Run Economic Fluctuations3.1 How the Short Run Differs from the eagle-eyed Run3.2 The Basic Model of Economic Fluctuations4. The Aggregate Demand bias4.1 Why the Aggregate Demand Curve Slopes Downwards4.2 Why the Aggregate Demand Curve May conjure5. The Aggregate Supply Curve5.1 Why the Aggregate Supply Curve is Vertical in the Long Run5.2 Why the Aggregate Supply Curve May Shift5.3 A New Way to Depict Long Run Growth and Inflation5.4 Why the Aggregate Supply Curve Slopes Upward in the Short Run5.5 Why the Short Run Aggregate Supply Curve May Shift6. two Causes of Economic Fluctuations6.1 The Effects of a Shift in Aggregate Demand6. 2 The Effects of a Shift in Aggregate Supply7. Summary2. Three Key Facts about Economic FluctuationsEconomic activity fluctuates from year to year.-----------------------------------------------In most years work of goods and services rises. On average overthe past 50 years, return in the U.S. economy has grown by about 3percent per year. In some years normal growth does not occur, causinga recession.- A recession is a period of declining real gross domestic product, falling incomes, and rising unemployment.- A depression is a severe recession.2.1 Fact 1 Economic Fluctuations are Irregular and Unpredictable- Economic fluctuations are irregular and unpredictable.- Fluctuations in the economy are often called the business cycle.2.2 Fact 2 Most macroeconomic variables fluctuate together Most macroeconomic variables that measure some type of income or production fluctuate closely together. Although many macroeconomic variables fluctuate together, they fluctuate by different am ounts.2.3 Fact 3 As output falls, unemployment rises- Changes in real GDP are inversely related to changes in the unemployment rate.- During times of recession, unemployment rises substantially.3. Explaining Short Run Economic Fluctuations- Most economists believe that classical theory describes the world in the pertinacious run plainly not in the short run.3.1 How the Short Run Differs from the Long Run- Changes in the money supply affect nominal variables but not real variables in the long run.- The assumption of monetary neutrality is not appropriate when studying year-to-year changes in the economy.3.2 The Basic Model of Economic Fluctuations============================================Two variables are used to develop a model to analyze the short-runfluctuations- The economys output of goods and services measured by real GDP.

Death Penalty - Herrera vs Collins Essay -- Capital Punishment Essays

Death Penalty - Herrera vs CollinsThe Supreme Court address the constitutionality of executing someone who claimed actual innocence in Herrera v. Collins (506 U.S. 390 (1993)). Although the Court left open the possibility that the Constitution bars the execution of someone who once and for all demonstrates that he or she is actually innocent, the Court noted that such cases would be very rare. The Court held that, in the absence of other constitutional violations, new register of innocence is no reason for federal courts to order a new trial. The Court also held that an innocent inmate could seek to prevent his execution by means of the clemency process, which, historically, has been the fail safe in our justice system. Herrera was not granted clemency, and was executed in 1993..Since Herrera, concern regarding the possibility of executing the innocent has g wordsn. Currently, more than 80 death row inmates have been released because of innocence since 1973. In November, 1998 North western University held the first-ever National Conference on Wrongful Convictions and the Death Penalty, in Chicago, Illinois. The Conference, which drew nationwide attention, brought together 30 of these wrongfully convicted inmates who were exonerated and released from death row. Many of these cases were discovered not as the result of the justice system, but instead as the result of new scientific techniques, investigations by journalism students, and the work of volunteer attorneys. These resources are not available to the typical death row inmate.Public SupportSupport for the death penalty has fluctuated end-to-end the century. According to Gallup surveys, in 1936 61% of Americans favored the death penalty for persons convicted of murder... ... retain the death penalty, including China, Iran, and the United States, all of which rank among the highest for international executions in 1998. (Amnesty International, 1999)----------------------------------------------------------- ---------------------SourcesAmnesty International, total of Abolitionist and Retentionist Countries, Report ACT 50/01/99, April 1999D. Baker A Descriptive Profile and Socio-Historical Analysis of Female Executions in the United States 1632-1997 10(3) Women and Criminal Justice 57 (1999)R. Bohm, Deathquest An Introduction to the Theory and Practice of Capital Punishment in the United States, Anderson Publishing, 1999.The Death Penalty in America Current Controversies, H. Bedau, editor, Oxford University Press, 1997.K. OShea, Women and the Death Penalty in the United States, 1900-1998, Praeger 1999.