Sunday, March 15, 2020

How Resins Protect Trees and Increase Tree Value

How Resins Protect Trees and Increase Tree Value Tree resin (along with other gum and latex fluids) plays an extremely important function in trees by rapidly sealing over wounds  used as introductory pathways by invading insects and fungal disease agents. Organisms that try to enter a tree via a wound can be flushed out, can become stuck and trapped in the seal and can be overcome by the resins toxicity. It is also thought that resins have high antiseptic qualities that prevent decay and that they also lower the amount of water lost from the plants tissues. In any event, consistent resin flow is essential to the continued health of most conifers. If you have regularly handled or touched the bark or cones of pine, spruce or larch, you know about the fragrant sticky resin they copiously ooze. That resin is contained in ducts or blisters that run through the bark and wood and diminish in size and number as they enter roots and needles. Hemlocks, true cedars, and firs have resin mainly restricted to the bark. Wound trauma to a tree can stimulate the production of traumatic resin canals that help in containing the injury and help in healing any resulting infection. Resin-laden blisters contained in the conifer secrete the light liquid, which immediately loses oils to evaporation and forms a heavy solid scab. It is interesting to note that this reaction to trauma by a tree is used in the manufacturing process of certain commercial resins and essential oils by stimulating resin flow by inflicting a purposeful injury or bark irritation (see tapping below). The production of resin is very common in nature, but only a few plant families can be considered of commercial importance to resin collectors. These important resin producing plants include the Anacardiaceae (gum mastic), Burseraceae (incense tree), Hammamelidaceae (witch-hazel), Leguminosae, and Pinaceae (pine, spruce, fir, true cedar). How Resins Are Formed, Collected, and a Little History Resins are formed as a product of the oxidation process of a trees escaping essential oils - also called volatile oils, ethereal oils or aetherolea. As already mentioned, the resin is usually stored in ducts or blisters and frequently oozes out through the bark to harden when exposed to air. These resins, as well as being critical to a trees health, can be commercially valuable when collected or tapped. Resinous concoctions have been used for millennia in the form of waterproof and protective coatings made by the ancients. Varnished objects have been found in Egyptian tombs and the use of lacquer in the practice of their arts has been used in China and Japan for centuries. The Greeks and Romans were familiar with many of the same resinous materials that we use today. It is the ability of tree resins to harden as essential oils evaporate that makes them necessary to the production of commercial varnishes. These resins are readily dissolvable in solvents like alcohol or petroleum, surfaces are painted with the solutions and as the solvents and oils evaporate, a thin waterproof layer of resin remains. Tapping is usually necessary in order to obtain a sufficient amount to be of commercial value but can also be extracted during the processing of a tree species for another product - pine resins and oils that can be collected during the paper pulping process. Commercial hard resins are also frequently mined and extracted from ancient fossil materials like copal and amber for varnish. It is important to understand that resins, unlike gums, are insoluble in water, but they are easily dissolved in ether, alcohol and other solvents and used in many products. Other Resin-Based Products Hard transparent resins, like copals, dammars, mastic, and sandarac, are mainly used for varnishes and adhesives. The softer odoriferous oleo-resins like frankincense, elemi, turpentine, copaiba and the gum resins containing essential oils (ammoniacum, asafoetida, gamboge, myrrh, and scammony) are more often used for therapeutic purposes and incense. Resin, Kraft or pine soap (one trade name is Pine Sol) is made by reacting resin acids in wood with sodium hydroxide. Kraft soap is a byproduct of the Kraft process for manufacturing wood pulp and used as a super strength cleaner for heavily soiled and greasy cleaning jobs. Resin in the form of rosin is applied to the bows of string instruments because of its ability to add friction to bow hairs to increase sound quality. It is used similarly in sports to provide tack to grip bats and balls. Ballet dancers may apply crushed resin to their shoes to increase grip on a slippery floor.

Friday, February 28, 2020

Automated Labeling System (Cost Benefit Analysis an IRR) Assignment

Automated Labeling System (Cost Benefit Analysis an IRR) - Assignment Example However, the intuitive controls for the system facilitates in ensuring that the training efforts are reduced significantly. The benefit of the automated labeling system for an ASRS is that the ASRS is fully automated and it attains a higher operation and efficiency in terms of storage and retrieval of information and data. Thus, the process time for the system is improved significantly with the automation of the labeling system. Moreover, the automation creates an opportunity for the integration of the system with all the electrical and mechanical software and hardware, which is provided. The implementation of the system will also ensure that ASRS attains cost effectiveness, flexibility and reliability in the conduct of its services (Michaelyn et al., 2002). Furthermore, process scheduling and data management occurs effectively. Such entails tracking of the results. The automation will also address the issue of the personnel shortage since there is less manpower needed for the operation of the system. Such employees are relocated to other job tasks in the organization, which are demanding a boost on thei r man-power level. Hence, system automation will ensure that the storage and retrieval time is reduced significantly. In addition, monitoring and evaluation of the performance level of this system can be done easily by tracking the results of the system output on daily basis. The internal rate of return for implementing the automated labeling system is very high. Such is based on the potential of the system to improve on the performance and efficiency of ASRS, which increases the productivity and profitability level of the organization. The system also has a higher rate of return on the investment based on its cost effectiveness, improvement of the accessibility and flow, labor reduction, easy maintenance and saving on the floor

Wednesday, February 12, 2020

Outline and evaluate Barthes concept of myth Essay

Outline and evaluate Barthes concept of myth - Essay Example Barthes was brought up in Bayonne by the mother and, periodically, by his grandparents. Barthes attended the Lycà ©e Montaigne, Paris (1924-30), and Lycà ©e Louis-le-Grand (1930-34). At the Sorbonne he studied classical letters, Greek tragedy, grammar and philology, receiving degrees in classical letters (1939) and grammar and philology (1943). In 1934 Barthes contracted tuberculosis and he spent the years 1934-35 and 1942-46 in sanatoriums. Numerous relapses with tuberculosis prevented him from carrying out his doctoral research. He taught in Rumania and in Egypt, where he met A. J. Greimas, then at the Ecole des Hautes Etudes en Sciences Sociales. He was one of the founding figures in the theoretical movement centered on the journal Tel Quel. As the leading structuralist thinker, Barthes was highly influenced by Ferdinand de Saussures semiology - the formal study of signs and signification. He was a prolific interpreter, disseminator, and reviser of most of the complex theoretical concepts that circulated within Frances centers of learning from the 1950s on. Barthes was appointed to the Collà ¨ge de France in 1977 and was acknowledged as the leading critic of his generation in 1978. Aside from being the dominant theorist of the 1970s across Europe and America, Barthes made his influence felt in popular culture as well. He dies Mars 26 1980, due to complications after hed been hit by a van on his way home from a lunch with Franà §ois Mitterand in February the same year. Barthes is particularly interested, not so much in what things mean, but in how things mean. One of the reasons Barthes is a famous and well-known intellectual figure is his skill in finding, manipulating and exploiting theories and concepts of how things come to mean well before anyone else. As an intellectual, Barthes is associated with a number of intellectual trends (e.g. structuralism and post-structuralism) in postwar

Friday, January 31, 2020

Silent films VS films from our time Research Paper

Silent films VS films from our time - Research Paper Example Sound design is one of the most noticeable and transformative elements of film art due to its capacity to heighten the emphasis of other film elements such as the Mise-en-scene and Editing. Accordingly, this research studies the sound design of Metropolis and LOTR with the intention of identifying the influence of sound design on the overall structure of the films. Basically, this research contends that Metropolis and LOTR have similar usage of sound film as a supporting aspect of the action-filled characters and events in the two films. 2.0. Film Sound In filmmaking, film sound includes the process of creating and manipulating sounds; it covers both the technical and creative aspects of audio presentation that may contribute to the overall effect of the film (Dakic, 2009, p. 1). For instance, filmmakers may create new sets of sounds that could backup their preferred videos and images appropriately while they could also alter existing sound to achieve their desired effects. In discus sing the significance of sound design, Pramaggiore and Wallis (2005) state that sound design is a vital aspect of filmmaking, both in the Silent and Contemporary film periods, because of its capacity to extend the story of the film even without lengthening the dialogues of the characters (p. 209). For instance, any subtle, or explicit changes in the sound effects either corresponds to changes in the mood of the characters, or even signals a forthcoming, unexpected event in the film. Consequently, Dakic (2009) mentions that such an influence of sound design in cinemas contributes to the overall interplay of cinematic elements such as dialogues, characters, and events while maintaining little attention to itself as a cinematic element, as well (p. 1). According to King (1996), silent films still use sounds, regardless of the misconceptions about the lack of sound effects of the said film genre (p. 31). In addition, King (1996) explains that such misconceptions are rooted in the preval ence of synchronized audio-visual imagery in today’s contemporary films wherein audio recordings and videos are successfully edited and integrated to form the overall visual and auditory reality of the film. Instead, King (1996) contends that Silent Film uses sounds as the primary aspect that helps audience understand the emotional impact of the film, considering that the conversations of the characters are not audible enough for the audience to hear. Relatively, Silent Films rely heavily on the expressionist actions of the actors, as well as the live performances of the musical ensembles in the cinema. Contemporary action films also highlight the role of sound film in the overall impact of the movie. In the words of Sergi (2005), the significance of sound film rises to prominence along with the invention of digital audio technologies wherein the audience derive insights from the subtle changes in the sound effects, as much as changes in the personalities and actions of the c haracters (p. 3). In modern films, film sound functions as an integral part of the movie; it fills the silence and gaps while it also supports the transitions of videos. It also has a significant emotive impact that is similar to its usage during the Silent Film period. For instance, modern filmmakers emphasize the interplay between videos and sounds, particularly in foreshadowing certain cinematic events, as well as aiding the visual

Thursday, January 23, 2020

Narwhals :: science

Narwhals Introduction Narwhals, the unicorns of the sea, are very mysterious creatures that are not widely known. They are whales with many fascinating features and historical value. This research paper is answering the question, â€Å"What are Narwhals?†. General Description Monodon Monoceros, Latin for â€Å"one tooth, one horn†#; or Narhval, Norwegian for â€Å"corpse whale† , because of it mottled coloration suggests a bloated corpse#.Narwhals are in the white whale family, along with the beluga, but are actually covered with spots of black, white, gray-green, and cream. Newborns are dappled gray-brown, white spots come with age#. At birth the calves are about 5 feet long and 180 pounds. Male Narwhals can reach 16 feet long, not including the horn which is 8 to 9 feet long, and weigh around 3000 pounds. Females are around 13 ft. long, do not have tusks, and weight around 2000 pounds. Adult males and females are usually dark in the area of the head, especially top of the head and upper and lower jaws#. Unlike most other whales, Narwhals have no dorsal fin, instead they have a low bumpy ridge that begins at about the midpoint of the back and continues to the fluke#. Tusks The tusks, giving Narwhals the name â€Å" Sea Unicorn†, is actually a tooth that can reach up to nine feet long and can weigh up to 20 pounds. Males and females are born with two teeth pointing forward in the upper jaw#. The left tooth of the male grows long and spirals counter clockwise toward the tip. On rare occasions there have been Narwhals with twin tusks. Research on Narwhals supports the idea that the tusk is both a weapon and a symbol of dominance in ritual displays#. Some other ideas about what the tusk is used for include the following: ice breaker or and instrument to poke breathing holes in ice#; rake to stir up the sea bottom for food#; skewer to impale prey species#. One hundred out of three hundred and four males tusks are broken, this might be a result of fighting#. Narwhal tusk can heal itself. Newman, a whale expert, suggests,â€Å"If the tusk breaks, it is possible that infection is avoided because of dentine deposits which fill the broken end. This repar ative function could explain descriptions by old whalers of Narwhals with broken tusks exhibiting a ‘plug’ in the broken end†# .Tusks sold for $1.25 a pound in 1962, in 1974 it went up to $25 a pound, and in 1976 it was $35#.

Wednesday, January 15, 2020

Facebook considers opening site to children

Facebooks manager of privacy & safety had announced that the social network has â€Å"thought a lot† about opening up the site to children under the age of thirteen to get the opportunity to access on to Facebook. Similarly, Facebook had changed its policies that allow children under thirteen to put public post online that can be viewed by everyone in the world. Therefore, this may effect children's life. Opening the site to children under the age of thirteen is a bad idea due to many issues.First, it might cause cyber bullying on the social medias; second, it might effect the children and their families' communication; and third, it might cause kidnapping, rape or murder cases. Cyber bullying is an anti-social behavior and this is related to technologies and the internet. First, cyber bullying is referring any kind of aggressive behavior through social media. Cyber bullying could happen by text, Facebook posting, Tweet, Skype, or E-mail, but most constantly happen on Facebook .Cyber bullying usually resulting in trauma victim, can also cause low cademic achievement, interpersonal, alienation, there may even produce retaliatory attacks forced the victim or the victim turned to bullying others; it also has some impact in the offender, the offender adult crime, alcohol abuse is quite high, with the offender characteristics, 60% male perpetrators for crimes committed before the age of 24, non-male offender characteristics only 23%.So if Facebook do allows children under the age of 13, there might be a chance to increase the cyber bullying cases. Second, communication between the children and their family is very important, but f Facebook allows children to gain access to Facebook, it will affect the communication the children and their family. A family with good communication between each other might involve lots of technological activities; indeed, technology may become a tool or media for the communication between each other.For example, some people do not like to tell things face to face, but they open their heart through online chatting or messages (Facebook chatting); in this way, technology become a media to connect children and parents. Thus, it even improved the communication between children and parents. This will definitely effect the children and families' communications, by not communicating with each other. So if Facebook allows children access on to Facebook under the age of 13, it may effect the communication between the children and their families'.Third, allowing children of the age of 13 or under gain access to Facebook might cause kidnapping, raping and murdering cases. Now a day, a lot of teens have Facebook accounts, and they enjoy using it. Chatting online with strangers turned going out in real life and this will lead them to getting kidnaped, raped or murdered; the crimes creates a fake nternet profile on Facebook and start chatting to the innocent teen or children, after they got the teen's or child's trust, an d convincing them to go out together in real life.Thus, the crimes such as kidnaps, rapes or murders them during the time when they are outside. Because these cases already happened to a lot of teenagers, it will increase possibly of the teens and childrens getting involve will kidnap, rape or Facebook opening site to children under the age of 13 to get the opportunity to access on to Facebook is extreme dangerous, because it will effect children's life, etal health, education or the negative effects and causes above.Also, it takes up a lot of time on an online world and playing all the cyber games; instead in reality they may think it is not. Sometimes, people or things on the internet are fake and it is not trust worthy. Furthermore, the teenagers should be ware of the strangers on Facebook, must not share any personal information with them, or else they can find you and kidnap, rape or murder you. Due to many issues, Facebook should re-discuss and make an correct decision, becaus e this will cause or effect many things that no one will want to happen.

Tuesday, January 7, 2020

Essay on Drugs - 4552 Words

I was powerless over drinking and using... Imagine a cold, unheated apartment in the middle of Hollywood. A bachelor sized apartment. No pictures hanging on the wall, a mattress in the middle of the floor, a hard back folding chair sitting in the middle of the room, a few kitchen utensils and some old pots and pans laid on and around the kitchen stove with no place to go. You could hear the traffic zooming by on Franklin Avenue. When you opened the door with your key, you could see cockroaches running about on the walls and the floors. It felt was cold and smelled awful. The first time I was visited by my then boyfriend, I watched him shoot cocaine, and kept a careful eye on where all the cockroaches were headed. It wasnt long before I†¦show more content†¦I never thought that drinking was a problem for me too, until later. Unfortunately, whenever I drank, the mental obsession and physical craving to have drugs was so powerful, it always seemed to get the best of me. I was absolutely powerless over drinking and using . Ive described what it was like, now I will explain what happened next and what it is like now What happened is I was really feeling suicidal. I knew I could not stop. I had tried. Yet any time I was offered a drink or drug, I could not turn it down. I had work to attend to, classes to study for. My intentions were to stop and tend to these obligations, yet I could not. One more absence from my job and they were going to fire me. Plus, I was failing all my college courses, again. It was past the deadline to drop the classes. I was desperate. I heard of other students getting out of failed grades by going to a psychiatrist and being diagnosed as mentally ill. Desperate, I phoned Kaiser hospital. They put me through to the drug treatment program. They said I could go down there that day for an interview. I was so nervous. I thought I would meet with the psychiatrist and that would be that. Get the note and go. As I sat in the interview, I was asked all sorts of questions about my dru g use. At first, I thought I needed to exaggerate my drug use. After all, only really bad off, low life, drug addicts were admitted to this type of program. After I told them some of my quot;exaggeratedquot; story, by some miracleShow MoreRelatedThe Drug Of Drugs And Drugs Essay1125 Words   |  5 Pagessomeone offered you some sort of drug, whether it is a street drug or a pharmaceutical drug. What would you do? You may think it’s not such a big deal to go ahead and try it. You think it’s only one time right. However, some things can be addictive or kill you immediately like heroine. Other things make people slowly addict themselves to it, or to the experience of being high. They will put their lives and other peoples live in jeopardy for this drug or feeling these drugs give them. 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