Monday, August 24, 2020

Apple and employee motivation Essay Example for Free

Apple and representative inspiration Essay Preferably, Apple needs to have a working environment that encourages imagination from all the representatives. Apple consolidates extraneous and natural inspiration so as to engage their workers to be inventive. There are various techniques Apple utilizes to spur its representatives. Once, Apple compensated its administrators by giving them an acknowledgment reward of 3 to 5 percent of their base pay. This inspiring motivating force happened in spite of the way that they as of late missed their objective on an undertaking. This infers Apple upper administration felt for the gatherings endeavors. Another inspiring motivating force is the rebate on items that all Apple representatives get. Representatives who work at corporate Apple can get a free iPhone or iPod Shuffle. Offering items to representatives as opposed to cash can be a superior a successful helper on the grounds that numerous Apple workers are basically spurred to see the final products of their endeavors. It is likewise ordinarily less expensive to give the workers items instead of a raise. As of late, Apple has given representatives more get-away days due to the companys solid execution in item deals. These are largely extraneous instances of how Apple propels its representatives. Representative inspiration additionally originates from the corporate culture. Most Apple representatives are intensely dedicated to their work and can be portrayed getting a charge out of dull encoding. Maybe it is even sagacious to take a gander at what inherent powers were driving Steve Jobs. Occupations Stanford beginning discourse demonstrates that he realized he made some restricted memories on Earth and this inspired him to follow his heart and seek after his energy. His definitive inspiration for making creative items was not based around benefit however what might he would by and by need to have.

Saturday, August 22, 2020

Why It Is Bad to Miss Class free essay sample

Mike Meyer Professor Calderwood Argumentation/Debate May 22, 2013 Why it is Bad to Miss Class Missing class is never something worth being thankful for, particularly when you are taking a class that meets once per week. Everybody has their reasons to why they need to miss class. You could be debilitated, somebody happened to hit your vehicle on you approach to class; there can be a passing in the family, or just didn’t want to go to class. What ever your explanation is you ought to consistently endeavor to make it class regardless of what since you pass up exercise, you lose the study hall experience for the afternoon, and you get set apart down on your evaluation. As a matter of first importance, the fundamental motivation behind why you go to class is so you can learn. You go to class to learn in light of the fact that you either are keen regarding the matter or you have to know the material so you can handle the class with a passing mark. We will compose a custom exposition test on Why It Is Bad to Miss Class or then again any comparative theme explicitly for you Don't WasteYour Time Recruit WRITER Just 13.90/page Understudies who don't appear at class get lower blemishes on their test and hence they get lower reviews in the class. At the point when you are not class you compel yourself to gain proficiency with the material without anyone else and that is a lot harder to do instead of having a specialist in the subject instruct you. Second of all, you pass up the homeroom experience. On of the greatest favorable circumstances you have in going to class is having an educator and cohorts in a room sharing the shared objective in learning. You can pose inquiries to the educator or your colleagues and you will find your solutions instead of exploring for an answer on you own. Likewise, if either the educator or your colleagues know the solution to your inquiry then everybody in the homeroom will cooperate to discover one. The study hall experience is one major bit of leeway you have and not going is simply making life harder on yourself. Ultimately, on the off chance that you wear not go to class you will get set apart down on your evaluation. A great deal of classes grade you on interest and each time you don’t go to class you pass up focuses. You could likewise not be in class and there could be a test or even a test and you not being at class implies you get a zero on that grade. The more you miss class, the more you pass up focuses for your evaluation to show signs of improvement, and if your missing those focuses your evaluation isn't remaining the equivalent, it is deteriorating. All in all, missing class is never something worth being thankful for. We al have are pardons for missing class yet put forth a valiant effort to be there each and every day. In the event that you do miss class simply recall that you pass up the exercise for that day, you lose the study hall experience for the afternoon, and you get set apart down on your evaluation. Going to class is consistently the best activity and on the off chance that you do have a teacher that will let you do a task, for example, compose a 600 page paper on why it is terrible to miss class to reclaim the focuses you passed up for the class, at that point you will wanted that you went to class.

Saturday, July 18, 2020

Dialectical Behavior Therapy for OCD

Dialectical Behavior Therapy for OCD OCD Treatment Print Dialectical Behavior Therapy for OCD Another Alternative When Exposure Therapy Doesnt Work By LuAnn Pierce, LCSW, is a licensed clinical social worker who has worked in the field of mental health and human services for over 25 years. Learn about our editorial policy LuAnn Pierce, LCSW Updated on November 18, 2019 Martin Barraud/Getty Images More in OCD Treatment Causes Symptoms and Diagnosis Types Living With OCD Related Conditions Your therapist may have recommended that you pursue dialectical behavior therapy for your obsessive compulsive disorder (OCD). What type of therapy is this and how does it compare with other therapies for OCD? Cognitive Behavioral Therapy for OCD Cognitive behavioral therapy (CBT) is a type of psychotherapy that focuses on how thoughts and feelings can lead to behaviors. It has been found to be very helpful in both the short term and long term for people living with OCD. A type of cognitive behavior therapy called exposure-response prevention therapy (ERP) has been considered the gold standard for treating OCD. Yet for those who find that exposure-response prevention therapy does not work for them, dialectical behavior therapy may be an option. Dialectical Behavior Therapy Dialectical behavior therapy (DBT) is a form of cognitive behavior therapy that focuses on mindfulness, acceptance, validation, and building trust. It was originally intended for people with borderline personality disorder but has since been looked at for people with a wide range of mental health concerns. One of the biggest differences between DBT and other forms of therapy is the concept of acceptance. No matter your thoughts, they are not good or bad. DBTs History Dialectical behavior therapy (DBT) was developed by Marsha Linehan in the late 1970s at the University of Washington. Linehan worked with patients who had chronic suicidal thoughts, suicide attempts and self-harming behaviors that are often the result of deep wounds from childhood abuse and/or neglect. Many people who have these traits are diagnosed with borderline personality disorder (BPD), while others may be suffering from posttraumatic stress disorder (PTSD). At the time that DBT was developed, cognitive behavioral therapy (CBT) had been identified as the treatment of choice for pretty much every mental illness. Linehan, however, realized that the patients she worked with were unable to benefit from CBT due to the direct nature of the work and the constant focus on change. These patients felt CBT was judgmental, confrontational and invalidating. Linehan wisely adapted traditional CBT to make the approach more validating. Since that time, DBT has been proven effective for a wide array of other mental health problems, particularly mood and anxiety disorders. Skill Sets DBT has four primary skill sets (discussed further below) that people can learn to apply to their lives. These include: Distress toleranceEmotional regulationInterpersonal effectivenessMindfulness DBT is generally taught in groups that accompany individual therapy sessions. People who are learning to used DBT skills document how well and how often they apply the skills between group sessions and discuss this in-depth with the individual therapist. DBT for OCD and Anxiety: Acceptance and Non-Judgment DBT skills are used to cope with the pain and fears associated with everyday life. DBT draws heavily on the Buddhist concepts of acceptance, non-judgment, and mindfulness. These have been found to be very useful skills for managing OCD. Unlike CBT, where the focus is on making and measuring changes in behavior, DBT is focused on acceptance and non-judgment. The therapeutic relationship is critical as people learn to be honest about their behavior and emotions without shame or feeling like they have failed. It is the validation of their efforts to show up and talk about their progress (or lack thereof) that is important for many people. Once trust with the therapist is established, people tend to take more risks in therapy. This step is often necessary before they are ready to make changes. Studies have found that DBT can improve quality of life and self-control as well as reduce hopelessness in people with personality disorders such as OCD. How to Apply DBT Skills to OCD If youre wondering how you may be able to used DBT skills with your OCD, here are examples of how these skills are used: Distress Tolerance: These skills are used to either distract or self-soothe when faced with disturbing thoughts or emotions. Emotional Regulation: By  learning skills to manage the anxiety related to obsessions and/or fear, you will begin to realize that your anxiety will lessen with time without having to give in to the usual compulsion or reassurance. Interpersonal Effectiveness: This set of skills helps you manage your feelings related to interactions with others, which might include needing to seek reassurance. Mindfulness: The skill of mindfulness helps you to be more present at the moment. Being mindful includes not hanging on and attaching to distressing thoughts, practicing being non-judgmental (realizing that your thoughts are neither right nor wrong,) and redirecting your thoughts to the present moment when intrusive, repetitive thoughts occur. An Alternative to ERP DBT does not directly address obsessions and compulsions as does exposure-response prevention therapy (ERP). DBT skills are used to cope with the anxiety associated with fearful thoughts or obsessions that result in compulsive behaviors. Additional Treatment May Be Needed There are a number of treatments that may be considered for OCD. Most people need medication in addition to therapy to manage OCD. An evaluation by a psychiatrist is recommended to determine if medication might be helpful in your treatment plan. Bottom Line Dialectical behavior therapy is a type of cognitive behavior therapy that may be effective for some people with OCD. In particular, those who have found exposure-response prevention therapy, the gold standard for OCD, ineffective. It can be frustrating to live with OCD, but therapy and sometimes medications may greatly improve your symptoms and decrease your distress related to the disorder. The 9 Best Online Therapy Programs

Thursday, May 21, 2020

South Africa And South African Literature Essay - 1487 Words

After the end of World War II, new ideals began to encroach on South Africa. One of these new ideas was Apartheid, the idea that the races should be separate. This idea quickly became practiced in everyday life and became included in the laws governing South Africa. As one can imagine this ideal also invaded the literature written in South Africa and South African writers. In order to develop Apartheid, the creation of an â€Å"other† was necessary, which established a type of â€Å"us† versus â€Å"them† mentality. The understood â€Å"us† that was created included all whites and the understood â€Å"them† that was created included coloreds, Asians, blacks, and everyone that wasn’t white. The ideological construction of the â€Å"other† as viewed through the South African texts, Heart of Darkness and Cry, The Beloved Country, was formed through ideas of superiority, dissociation, and eventually through racism. However, both South Afri can texts also include examples of awareness of oppression from the point of view of the in-group. In Albert Memmi’s text, The Colonizer and the Colonized, he discusses the formation of racism within a colonial and colonized society. He begins with â€Å"Colonial racism is built from three major ideological components: one, the gulf between the culture of the colonialist and the colonized; two, the exploitation of these differences for the benefit of the colonialist; three, the use of these supposed differences as standards of absolute fact† (Memmi, 71). With this quote,Show MoreRelatedThe Culture Of South Africa1622 Words   |  7 Pages South Africa By: Hannah Devine December 5, 2014 Period 4 â€Æ' There are 196 countries in the world and South Africa is the 25th largest. Inhabited by around 53 million people, the country is represented as a whole by all of those people, exhibiting the five elements of culture in their everyday lives. The country is called the rainbow nation because if its diversity of people, religions, and cultures. Culture is all the things that make up a people’s way of life as well as what we inherit from ourRead MoreInfluence Of Modern Day South Africa Essay1525 Words   |  7 PagesAudrey DeJong Carla Quigley GT Pre-AP Humanities 1 10/20/16 Over 6,000 Miles Away: The European â€Å"Empire† Influence in Modern Day South Africa In South Africa, ethnic groups with contrasting heritages can include Dutch, British, German, French, English, Zulu, Xhosa, and Basotho people (â€Å"Ethnic Groups†). The Dutch, Afrikaans, Zulu, and English language is also scattered throughout the provinces, these being used by the majority of the population. This diverse set of people mainly practices ChristianityRead MoreNew Negro Essay984 Words   |  4 Pagespresented southern African Americans with many new opportunities, including the option of relocation in search of better living conditions. The mass movement of black people from the rural areas of the South to the cities of the North, known as the Black Migration, came in the 1890s when black men and women left the south to settle in cities such as Philadelphia and New York, fleeing from the rise of Jim Crowe Laws and searching for work. This migration of blacks from the South has been an importantRead MoreE Commerce And The Internet Essay1226 Words   |  5 P agessales in South Africa during 2016. Although e-commerce is still in its starting phases, it is expected to reach a total market size of R7.5 billion in 2015 (Goldstuck:2015). During 2015 there was a survey and 22 percent of South African internet users said that they have made purchases on the internet and 48 percent plan to do this again. E-commerce in South Africa is still low in comparison with global standards; however the number of e-commerce users is set to triple in the future, making South AfricaRead MoreGender Roles, Hiv / Aids, Financial And Economic Status, Transactional Sex And Social Status Essay1474 Words   |  6 PagesThis literature review will explore other published literature on the topic of sugar daddies, female sexuality, gender roles, HIV/AIDS, financial/economic status, transactional sex and social status. The published literature will enable me to gain insight into the topic and to identify key issues that need to be discussed. This literature review demonstrates what has already been done in this study and identifies the gaps in the literature that needs to be explored. The term ‘sugar daddies’ is notRead MoreThe Life Of A Slave Girl By Harriet Jacob Essay1147 Words   |  5 Pagesthis statement manages to encompass two major aspects that characterize African-American literature: audience and truth. In all writing, understanding the target audience and how to arrange an argument or essay to appeal to that specific crowd is paramount. However, it is especially important for African-American authors, who typically need to expose injustices or call for social change in their works. In particular, two African-American authors who understood their audience and how to manipulate thatRead MoreThe Role Of Competition Law And Its Effects On The Local Market And South African Economy Essay1380 Words   |  6 PagesMy interest in this paper is to consider a complex network prospective; the application of Competition Law, and more specifically related to its effects on monopolistic competition, and its effects on the local market and South Africa n economy as a whole. South Africa (SA) was distant from many other major markets and production centers. This made it complex for international trade to compensate for these conditions, even though trade has expanded since 1994, mainly with the European (EU) and theRead MoreBiography of Nelson Mandela Essay833 Words   |  4 Pageselection in South Africa after years of racist oligarchy, Nelson Mandela began his victory address in a conventional style: â€Å"My fellow South Africans – the people of South Africa† (Guardian 3 May 1994 cited in Billig 1997:97). He went on to describe the new South Africa , â€Å"the type of South Africa we can build†. From his message it was clear that the country he spoke of had a unique, identifiable and addressable people: â€Å"The speech appealed to ‘us’, the people, the country, the nation. South Africa is calledRead MoreNelson Mandela and Leadership Essay847 Words   |  4 Pagesfreeing South Africa from the binds of racial segregation forever. However, it was not an easy road and Mandela needed patience, strength of character, focus, passion, understanding, perseverance, and most importantly, forgiveness, to achieve this. For more than forty years, black South Africans were subject to the harsh racial segregation of the Apartheid system; despite making up over 70% of South Africa’s population, they had little to no rights. Mandela had a vision for South Africa, of whichRead MoreFocus question: The effects of sin taxable products on the South Africa’s economy and their impact1600 Words   |  7 Pagesquestion: The effects of sin taxable products on the South Africa’s economy and their impact on South Africa’s Socio Economic Issues Aims †¢ The demand of products within South Africa †¢ The contribution Pretoria has on sin tax †¢ Effects of these products on the economy †¢ Amount of debt caused by luxuries such as sin taxable products †¢ Legislations against sin taxable products being sold illegally. †¢ Effects of sin taxable products on South Africa’s socio economic issues. †¢ Pros and Cons of raising

Wednesday, May 6, 2020

Strategies for Coping with Stress Essay examples - 2020 Words

Strategies for Coping with Stress Stress has been defined as a pattern of negative physiological and psychological processes occurring in situations where people perceive threats to their well being which they may be unable to meet. These situations involve stimuli which can be either real or imagines and are generally known as stressors. Stressors come in many forms; for example, they can be cataclysmic such as life disasters including floods and earthquakes and also things such as rape and abuse. But they can also quite insignificant things such as being late for work or stuck in traffic – these are generally known as life’s little hassles. Although stressors are mainly seen as negative,†¦show more content†¦There is also the problem of prolonged and severe stress as many people’s lifestyles can easily produce stressors and this increases their chances of a stress related illness. Much of the research regarding stressors and their long-term effects on the body comes from Seyle’s General Adaptation Syndrome (1956). A lot of Seyle’s research was based on using laboratory animals and his results showed that constant exposure to severe stressors produces three physiological phases, the first phase is alarm reaction, and this showed the bodies physiological response to a situation with stressful stimuli. Phase two was known as the stage of resistance in which if the stressful stimuli (stressor) persists or is not dealt with correctly the body seeks to maintain arousal at a constant lower level. The final phase was the stage of exhaustion where by eventually the continued high arousal levels exhaust the body’s resources producing both negative physiological and psychological effects. The extent to which people can adapt to a stressor depends on the individual and how they perceive the stressful stimuli because people’s emotions seem to be able to cope with short-term events where as the physiological response our body’s produce coincides with our negative emotions and soShow MoreRelatedLevels Of Stress And Coping Strategies Among Arts Streams, Male And Female University Students Of Peradeniya Essay1221 Words   |  5 PagesLevels of Stress and Coping Strategies Among Arts Stream, Male and Female University Students of Peradeniya Buddhiprabha. D. D. Pathirana, Senior Lecturer in Psychology, Department of Philosophy Psychology, University of Peradeniya Author Note Correspondence concerning this paper should be directed to Dr. Buddhiprabha D.D.Pathirana, University of Peradeniya, Sri Lanka, at buddhiprabha2001@yahoo.com or buddhiprabha@pdn.ac.lk Investigating the Levels of Stress and Coping Strategies Among ArtsRead MoreCoping Assignment On Coping1011 Words   |  5 PagesCoping Assignment To more fully understand the different strategies and methods to coping we need to understand the physiological and psychological process of stress and coping. â€Å"A stressor is an external influence that threatens to disrupt the equilibrium that is needed to maintain homeostasis† Pearson Education, 2015). In times of homeostasis we are comfortable and stable both physically and mentally. Stressors are life events, that may cause physical, mental, emotional, psychological or spiritualRead MorePositive or Negative Impact of Stress on Students775 Words   |  3 PagesFirth- Cozens, 2001) Stress can have a negative or positive impact on a student but it all depends on how they perceive it. An individual’s response to stress is determined by whether they see it as a challenge or a threat. This determines whether a person will take an active or avoidant or active strategies to cope with a situation. The way in which a student perceives academic stress will determine h ow they cope with it. It has been proven that some level of stress can be adaptive even consideredRead MoreCoping With Extreme Stress And Its Effect On The Stress Of A Person1569 Words   |  7 Pagesof work-related stress. One of the serious employment-concern, that eats away revenues, lessens efficiency and marks good employees’ hand their notice is workplace stress. There are workplace stress that is moderate, while extreme stress could be a hindrance to employees’ efficiency, commitment and satisfaction in the organization or management. Coping can fundamentally aid in reducing the stress of a person. Coping has two broadly acknowledged main functions: problem-focused coping and emotion-focusedRead MoreStress Management Essay1503 Words   |  7 PagesStress is defined as â€Å"any circumstances that threaten or are perceived to threaten one’s well-being and thereby tax one’s coping abilities† (Weiten Lloyd, 2006, p. 72). Stress is a natural event that exists lit erally in all areas of one’s life. It can be embedded in the environment, culture, or perception of an event or idea. Stress is a constant burden, and can be detrimental to one’s physical and mental health. However stress can also provide beneficial effects; it can satisfy one’s need forRead MoreThe Transactional Model Of Stress And Coping786 Words   |  4 Pagespsychological well-being and requiring action to restore balance (Lazarus Cohen, 1977). Beginning in the 1960s and 1970s, stress was considered to be a transactional phenomenon dependant on the meaning of the stimulus to the perceiver (Lazarus, 1966; Antonovsky, 1979). Core Assumptions and Statements The Transactional Model of Stress and Coping is a framework for evaluating the processes of coping with stressful events. Stressful experiences are construed as person-environment transactions. These transactionsRead MoreCoping Strategies, Coping Inventory, Self Regulation And Resilience819 Words   |  4 Pages Coping Strategies, Coping Inventory, Self-Regulation and Resilience in Regards to Anxiety or Stress on an Athletic Trainer What is stress? Hans Selye was the one who coined the word â€Å"stress†. Selye defined â€Å"stress† as a non-specific response of the body to any form of demand for change. Just as the way Selye defined it, stress is the way the body responds to any type of demand. Stress can be caused by both bad and good experiences. When a person feels stressed by somethingRead More Stress Affects Everybody Differently Essay1128 Words   |  5 PagesWhy Stress Affects Everybody Differently The word stress technically refers only to how our body reacts to stressors, different external inputs. Many stressors are not inherently stressful. There are conscious and unconscious things that occur in our inner world that determine whether a stressor in the external world will trigger our stress response, called mediating responses and moderating factors. (1) Some stress is good for us and motivates us. But signs that stress has gone tooRead MoreLack Of Support From Nurses1656 Words   |  7 PagesIn this paper, the author will identify a significant stressful situation, provide support how this situation was stressful, elaborate using Lazarus and Folkman’s theory of stress, describe social support as a stress mediator, clarify how social support can lessen the stress experienced by the author, and how to apply the stress mediator in professional and personal life. The author is a new graduate nurse. She has no experience working in a healthcare setting except for the clinical rotations sheRead MoreDifferent Types Of Personality Behavior1375 Words   |  6 Pagesneeded are traits of people who can cope effectively. These people use their skills and strengths to cope. Non-copers do not have these traits therefore they do not have access to natural or learnt coping abilities needed to cope effectively so they tend to turn to other sometimes faulty coping strategies and mechanisms (‘What Is Resilience? (And Why It Matters)’, n.d.). Personality types can be used to explain why some people cope while others do not. Two types of personality behaviour were described

Seven Approaches to Studying the Human Body Free Essays

When studying the human body, there are seven organizational approaches. Each approach studies the body in a different yet unique way and is used in the health care field. The approaches consist of; body planes and directions, body cavities, quadrants and regions, anatomy and physiology, microscopic and macroscopic, body systems and medical specialties. We will write a custom essay sample on Seven Approaches to Studying the Human Body or any similar topic only for you Order Now There are three body planes which use different directions: coronal, sagittal, and transverse planes. Coronal plane slices the body from head to toe giving a front and back view. There are two directions that are related with it; anterior posterior, moving from the outside of the body through the anterior part then the posterior section, and posterior anterior, which is its reverse. Sagittal plane cuts the body right down the middle giving a right and left view. Moving medially is to go inwards or towards the middle of the body from the outside and to go laterally is as if moving out or from the midline towards the outside of the body. Lastly, transverse plane divides the body giving a top and bottom sections. The top half is superior and the lower half is inferior. Moving cephalad is moving superiorly, and cuadad is moving inferiorly. Radiologists would use this approach when looking at x-rays or MRI scans to distinguish how the image was taken. There are five sections of hallow space, known as cavities, in the human body, all of which carry-over each other. Starting from the head is the cranial cavity that protects the brain, then the spinal cavity that travels down the middle of the back, then in the chest is the thoracic cavity where the lungs, heart and esophagus are, next is the abdominal cavity which is around the abdominal muscles and last is the pelvic cavity where the hip bones lay. An ultrasound technician would use this approach when projecting images from inside the body cavity onto the screen. The approach to use quadrants and regions is to divide up the abdominopelvic area into four parts, which are quadrants, and then into nine parts out of that which give you regions. (â€Å"Scribd. com†, 2010) This method can be used as a reference to where the organs are located in which area. For instance, in the left lower quadrant is the lower part of the kidney, part of the colon, and the left ovary for women. This type of diagram would help ith position the organs. In the health field, physicians refer to this during an internal exam. According to â€Å"Degreedirectory. org† (1999), anatomy studies the structure of organs and cells. Since cells are a microscopic size the best way to study, using this approach is with a microscope, which is, a tool used to examine cells. Physiology is the study of the function of organ and cells. Organs are of a macros copic size that means it can be seen with the naked eye. These approaches can be used in many ways in health care. An orthopedic would study muscles and tendons or an immunologist would study blood cells using a microscope. The human body is made up of several different types of systems. This means that each system is made up of a few organs, which synchronize with one another and work as a unit. Organs are unable to perform without the help of the other organs in their unit. All of the organs support one another to perform their functions. The gastrointestinal system breaks down the foods we eat into protein, vitamins, fats and carbohydrates, which is used for energy, growth and repair. The organs in the respiratory system are the nose, trachea and lungs. These organs help bring air into the body and eliminate the carbon dioxide. There is a system that acts as a defense called the lymphatic system and runs through the whole body. This system’s main function is to make white blood cells that act as disease fighting antibodies. The integumentary system consists of the skin, hair, nails, glands, and nerves. This system’s main function is to act like a barrier to guard the body from the outside world. The skeletal system protects the organs. It is made up of bones, ligaments, joints and tendons. It gives support and structure to the body and a place for muscle attachment and movement. In other words, it holds the body up. Without the skeletal system the human body would be unable to walk or stand up. The muscular system works with the skeletal system to control the movement of the human body. There are two types of muscles; ones that are voluntary such as moving an arm or leg and ones that are involuntary and act on their own such as the beating of a heat or stomach. How to cite Seven Approaches to Studying the Human Body, Essay examples

Sunday, April 26, 2020

What Is A Robot Essays - Robot, Industrial Robot, Mobile Robot

What is A Robot WHAT IS A ROBOT The term robot comes from the Czechoslovakian wordfor "forced labor," invented by Karel Capek. Karel Capek used robots in his plays and had them look and behave like people. Today, the word "robot" is harder to define because of new designs and technology. The third edition of Websters's New International Dictionary defines a robot as "a machine in the form of a human being that performs the mechanical functions of a human being." However, today's robot makers are not interested in giving their creations human forms. Most industrial robots look like lobsters or oversized grasshoppers. Around 1981, the members of the Robot Institute of America, held a meeting to develop a definition of an industrial robot. Finally after long debate, they came up with the definition: "A reprogrammable, multifunctional manipulator designed to move material, parts, tools or specialized devices, through variable programmable motions, for the performance of a variety of tasks." The key wor ds in their definition are "reprogrammable" and "multifunctional." By "reprogrammable" they mean that if a robot gets a new assignment, it will need new instructions, but its basic structure will not change (except maybe a new mechanical hand). By "multifunctional" they mean a robot is the mechanical counter part of a computer that can handle various problems without any major hardware modifications. The only thing that changes when a robot is reassigned is its program of instructions. In modern robots, programmable microprocessors control all the robot's movements and actions. Robots can be taught by using a teaching mode. An operator moves the robot's hand through all of the desired motions manually with his own hand. When the robot is activated, it will repeat those same motions over and over again. Most robots are equipped with one hand and one arm of several articulated joints. Some of these joints swivel in smooth arcs mimicking the behavior of the human shoulder, wrist, and elbow. Other robots move in straight lines similar to a crane. Robots rarely have a pair of arms, and are usually stationary. If a robot moves that is all it does. Examples are delivery robots rolling down halls delivering mail or supplies. The hands and arms of early robots were pneumatically powered (air pressure) or hydraulically powered (fluid pressure). Flexible tubes carried the pressurized substances to the joints. Now, electric motors located at the joint give the robot greater precision and control, but slow down its movements. All robot manufacturers dream of joints with human-like tendons. Most robots are blind and are insensitive to their surroundings. Some have sensors triggered by light, pressure, or heat that can create a crude picture of what is happening. ROBOTIC ARMS There are four types of robot arms that are used today. Degrees of freedom are the axes around the arm in which it is free to move. The area a robot arm can reach is its work envelope. Rectangular arms are sometimes called "Cartesian" because the arm's axes can be described by using the X, Y, and Z coordinate system developed by Descartes. Descartes is a famous French philosopher, scientist, and mathematician. If a pen were attached to the arm, it would draw a rectangle which would be its work envelope. Imagine a graph where X would be side to side, and Y would be in and out on the graph. Up and down would be Z which runs through the graph and describes depth. Z also adds the third dimension. A cylindrical arm also has three degrees of freedom, but it moves linearly only along the Y and Z axes. Its third degree of freedom is the rotation at its base around the two axes. The work envelope is in the shape of a cylinder. The spherical arm replaces up and down movements along the two axes with a rocking motion of the arm. The spherical arm's work envelope is a partial sphere which has various length radii. The last and most used design is the jointed-arm. The arm has a trunk, shoulder, upper arm, forearm, and wrist. All joints on the arm can rotate, creating six degrees of freedom. Three are the X, Y, and Z axes. The other three are pitch, yaw, and roll. Pitch is when you move your wrist up and down. Yaw is when you move your hand left and right. Rotate your entire forearm as if you are drilling a hole. Your arm would rotate around an axis that goes through the center of your wristbone.