Using Recycled PCC as Aggregate in New PCC Research Paper

Using Recycled PCC as Aggregate in New PCC - Research Paper Example However, these recycled concrete aggregates (RCA) have to meet NJDOT’s quality needs in case they are to be used in PCC. Only 11 states permit use of RCA in PCC, while all but 13 states allow the use of it in base aggregate. Some states also permit its use as miscellaneous aggregate and in HMA. Through the crushing / grinding of concrete pavements or any waste concrete, RCA is produced, after the removing any reinforcing steel. In the same way the production of aggregate from virgin materials is, production of required gradations is too- through screening and crushing (PCA 1). However, significant differences between virgin aggregates and RCA have led officials in state transportation in Muchials and New Jersey in adopting RCA as aggregate for PCC acceptably (PCA 1). The presence of mortar adhering to the Recycled aggregates or cement paste reduces density, increases drying shrinkage, and increases porosity in PCC. The presence of contaminants as well as the quality of the being recycles original concrete are all problems that should be taken in concern additionally (PCA 1). The two primary sources for use in PCC, of stockpiled RCA are precaters who are interested in reusing surplus materials and class B recyclers who crush and accept concrete waste. Before RCA is implemen ted, those are the issues that must be addressed. Another important component of the project is the preliminary review that has been provided for the expansion of this work, as a part of this proposal As the proposers believe, an extensive field installation plan is likely to result to open-ended and long research projects, which address the use of Recycled Concrete Aggregates in PCC. Due to this reason, proposals have been made to include field installation as part of part of the work. The field installation be limited to applications of lower risks that permit the recommendations and

Lean Thinking Research Paper Example | Topics and Well Written Essays - 750 words

Lean Thinking - Research Paper Example Its adoption of this strategy seems to be the reason why this business organization has survived in a competitive business environment. Supply chain management is a strategy that is used to streamline all business operations to ensure that they occur at the least cost possible and in the most efficient manner. In a competitive market environment, the cost of a product dictates the attractiveness of a business and consequently the inflow of customers (Taylor and Brunt, 2001). The development of products right from the time when raw materials are acquired to the time the final product reaches the customer has a cumulative impact on the cost of the products delivered in market. Harrison and Hoek (2011) point out that understanding consumer behaviour is important for a business that intends to survive in a competitive market. This is the reason why the Starbucks Corporation has decided to develop its lean thinking strategy to model an effective supply chain. One lean strategy of the Star bucks was to reduce the employee motion by bringing products closer to the customers. The company has a team of lean thinking implementers who have engaged in developing strategies that will define an effective supply chain. Ms Jordan, a developer in the lean team noted â€Å"†¦. how much my partners were moving for things that were never at the same place †¦Ã¢â‚¬  and notes the much that was wasted while preparing a single cup of coffee (Jordan, 2009). In response, she advised the employees to place goods on top so that they can avoid the time wasted while bending. Also, she suggested that some essential ingredients be placed closer to the customer to ensure that every customer has access to the product without having the need for employees to supply them every time. Saving time was part of developing an effective supply chain that reduces wastage of time, an important resource in an organization. The strategy employed by Starbuck Corporation can be regarded as minimiza tion of waste of unnecessary motions. Harrison and Hoek (2011, P. 195) point out that if employees have to move, bend or stretch unnecessarily, this is a waste of time that would have been utilized in the productivity. The activities of the company benefited this organization in two dimensions. First, the organization was able to increase the amount of sales which directly contributes to the financial performance of the organization. Secondly, customers attach value to organizations that provide timely services without due wastage of time. In fast food companies where time is a factor, responding to customer orders in time assures an organization of loyalty from the customers. This is the idea that Scott Heydon when he engaged a strategy to minimize motion wastage in the organization. Jargon (Para. 15) points out that there was an increase in customer loyalty in Starbucks after the motion in this organization was minimized. In 2008, the customer loyalty changed from 56% to 76% betwe en April and June and the number of transactions increased by 9% during this time. Harrison and Hoek (2011, p. 60) provides that satisfying the customer value is a key business aspect that garners loyal customers and pulls new buyers. This kind of business trends is important for an

Withholding Information Essay Example for Free

Withholding Information Essay It is frequently advisable for those in positions of authority in government to withhold information from general public Some information the public has the right to know while other information is better to be withheld. There are plenty of reasons why it is better not revealing information. Withholding information that may put the population in danger would be better than revealing information which would bring chaos. On the flipside, transparency and honesty between the government and the public are very important. Transparency is essential in order for a democracy to function and honesty is important in cases when there is need for strong relations to be created. And although I support the idea of freedom of information, the general public will never be educated enough to maintain consensus and national problems. In these cases withholding information helps to ensure stability in terms of national security, preserving the peace and well-being. The main reason authority keeps information is the fear from criticism and disapproval. A rational society would never be satisfied with vague information and would want to take part in the decision-making process. Government has a lot of information which the people may have an interest in but still some of this information is dangerous. Things like war strategies and secret missions need to be withheld. Being kept in the dark on some things as long as its truly for the good of the nation and not for someone’s benefit is acceptable. For example if government find the cure for cancer but decide that it would ruin pharmaceutical companies and chose not to reveal this information it isn’t right. On the other hand, there is a lot of information which public doesn’t deserve access to. Like information that endangers the government. Another reason for withholding information could be to cover mistakes and not causing discontent. The government always makes big promises and eventually it will have to fulfill some of them. If government promise to reduce the crime rate in 30% within a year and don’t follow the plan it will lose it’s credibility. I think that the idea some information to be withheld is valid. However, information that would improve the living standard of people or information which is of great importance for the future of humanity, in my opinion shouldn’t be kept. There is no clear moral answer here. When there is too much that is at stake, we can’t say that information should always be free. Should it benefit the public to know how their government works, or it should benefit the government to have the full control over our lives. Im not so sure.

Definition Of Pain And Pain Terminology Psychology Essay

Definition Of Pain And Pain Terminology Psychology Essay Pain is: An unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage 1-3, as proposed by the International Association for the Study of Pain (IASP). Pain is subjective. Each individual learns the application of the word through experiences related to injury in early life. Noxious stimuli are liable to damage tissue. Pain is an experience we associate with actual or potential tissue damage. It is always an unpleasant and therefore emotional experience. In several cases pain is reported in the absence of tissue damage or any likely pathophysiological cause. Usually there is no way to distinguish the experience of pain perception from that due to tissue damage. If the pain experience is reported as pain in the same way as caused by tissue damage, it should be accepted as pain. Pain is what the patient says it is, existing whenever the experiencing person says it does 4. This definition avoids relating pain to the stimulus. Activity induced in the nociceptor and nociceptive pathways by a noxious stimulus is not pain, which is always a psychological state, even though we may well appreciate that pain most often has a proximate physical cause. Pain Terminology Allodynia Pain due to a stimulus which does not normally provoke pain is termed allodynia. It involves a change in the quality of a sensation, whether tactile, thermal or of any sort. The original modality is normally non-painful, but the response is painful. There is a loss of specificity of sensory modality 2,5. Analgesia Analgesia is the term used for the absence of pain in response to stimulation which normally would be painful. Analgesia implies a defined stimulus and a defined response 2,5. Anaesthesia Dolorosa Anaesthesia dolorosa is pain in an area or region which is anaesthetic 2,5. Causalgia Causalgia is a syndrome of sustained burning pain, allodynia, and hyperpathia after nerve lesion, often combined with vasomotor and sudomotor dysfunction and later trophic changes 2. Central Pain Pain initiated or caused by a primary lesion or dysfunction in the central nervous system is termed central pain 2,5. Dysesthesia Dysesthesia is an unpleasant abnormal sensation, whether spontaneous or evoked. Compared with pain and with paresthesia, special cases of dyseshesia include hyperalgesia and allodynia. A dysesthesia should always be unpleasant and a paresthesia should not be unpleasant, although it is recognized that the borderline may present some difficulties when it comes to deciding as to whether a sensation is pleasant or unpleasant. It should always be specified whether the sensations are spontaneous or evoked 2,5. Hyperalgesia Hyperalgesia is an increased response to a stimulus which is normally painful 5. It reflects increased pain on suprathreshold stimulation. It is an increased response at a normal threshold or at an increased threshold, in patients with neuropathy. Hyperalgesia is a consequence of perturbation of the nociceptive system with peripheral or central sensitization, or both 2. Hyperesthesia Hyperesthesia is an increased sensitivity to stimulation, excluding the special senses 5. The stimulus and locus should be specified. It may refer to various modes of cutaneous sensibility including touch and thermal sensation without pain, as well as to pain. The term is used to indicate both diminished threshold to any stimulus and an increased response to stimuli that are normally recognised. Hyperesthesia includes both, allodynia and hyperalgesia, but the more specific terms should be used wherever they are applicable 2. Hyperpathia Hyperpathia is a painful syndrome characterized by an abnormally painful reaction to a stimulus, especially a repetitive stimulus, as well as an increased threshold 5. It may occur with allodynia, hyperesthesia, hyperalgesia, or dysethesia. Faulty identification and localization of the stimulus, delay, radiating sensation and after-sensation may be present, and the pain is often explosive in character. The changes are the specification of allodynia and the inclusion of hyperalgesia explicitly. Previously hyperalgesia was implied, since hyperesthesia was mentioned in the previous note and hyperalgesia is a special case of hyperesthesia 2. Hypoalgesia Diminished pain in response to a normally painful stimulus is termed hypoalgesia 5. It is defined as diminished sensitivity to noxious stimulation, making it a particular case of hypoesthesia. However, it now refers only to the occurrence of relatively less pain in response to stimulation that produces pain. Hypesthesia covers the case of diminished sensitivity to stimulation that is normally painful 2. The implications of some of the above definitions may be summarized as in table 1. Table 1: Types of pain summarized. Hypoesthesia Hypoesthesia is a decreased sensitivity to stimulation, excluding the special senses. In case of hypoesthesia the stimulation and locus must be specified 2. Neuralgia Neuralgia is pain in the distribution of a nerve or nerves 5. Common usage, especially in Europe, often implies a paroxysmal quality, but neuralgia should not be reserved for paroxysmal pains 2. Neuritis Inflammation of a nerve or nerves is termed neuritis 5. This term must not be used unless inflammation is proven to be present 2. Neurogenic Pain The term neurogenic pain is used for pain initiated or caused by a primary lesion, dysfunction, or transitory perturbation in the peripheral or central nervous system 2,5. Neuropathic Pain Pain initiated or caused by a primary lesion or dysfunction in the nervous system is termed neuropathic pain. See also neurogenic pain and central pain. Peripheral neuropathic pain occurs when the lesion or dysfunction affects the peripheral nervous system. Central pain may be retained as the term when the lesion or dysfunction affects the central nervous system 2. Neuropathy Neuropathy is a disturbance of function or pathological change in a nerve. When it occurs in one nerve it is termed: mononeuropathy. When several nerves are involved the term: mononeuropathy multiplex is to be used. The term: polyneuropathy is to be used in case of diffuse and bilateral peripheral nerve problem 2,5. Neural Plasticity Neural plasticity means the nociceptive input leading to structural and functional changes that may cause altered perceptual processing and contribute to pain chronicity 5. Nociceptor A nociceptor is a receptor preferentially sensitive to a noxious stimulus or to a stimulus which would become noxious if prolonged 5. The terms like pain receptor, pain pathways, etc. must be avoided 2. Nociception Nociception is the activation of sensory transduction in nerves by thermal, mechanical, or clinical energy impinging on specialized nerve endings. The nerve(s) involved conveys information about tissue damage to the central nervous system 5. Noxious Stimulus A noxious stimulus is one which is damaging to normal tissues. Although the definition of a noxious stimulus has been retained, the term is not used in this list to define other terms 2. A noxious stimulus is also defined as a stimulus capable of activation receptors for tissue damage 5. Pain Threshold The least experience of pain which a subject can recognize is termed the pain threshold 5. Traditionally the threshold has often been defined, as the least stimulus intensity at which a subject perceives pain. Properly defined, the threshold is really the experience of the patient, whereas the intensity measured is an external event. It has been common usage for most pain research workers to define the threshold in terms of the stimulus, and that should be avoided. However, the threshold stimulus can be recognized as such and measured. In psychophysics, thresholds are defined as the level at which 50% of stimuli are recognized as painful. The stimulus is not pain and cannot be a measure of pain 2. Pain Tolerance Level The greatest level of pain which a subject is prepared to tolerate is termed the pain tolerance level 5. As with pain threshold, the pain tolerance level is the subjective experience of the individual. The stimuli which are normally measured in relation to its production are the pain tolerance level stimuli and not the level itself. Thus, the same argument applies to pain tolerance level as to pain threshold, and it is not defined in terms of the external stimulation as such 2. Paresthesia Paresthesia is an abnormal sensation, whether spontaneous or evoked 5. It is used to describe an abnormal sensation that is not unpleasant while dyseshesia be used preferentially for an abnormal sensation that is considered to be unpleasant. The use of one term (paresthesia) to indicate spontaneous sensations and the other to refer to evoked sensations is not favoured. There is a sense in which, since paresthesia refers to abnormal sensations in general, it might include dysesthesia, but the reverse is not true. Dysesthesia does not include all abnormal sensations, but only those which are unpleasant 2. Peripheral Neurogenic Pain Pain initiated or caused by a primary lesion or dysfunction or transitory perturbation in the peripheral nervous system is termed peripheral neurogenic pain 2,5. Peripheral Neuropathic Pain Peripheral neuropathic pain is the term used for pain initiated or caused by a primary lesion or dysfunction in the peripheral nervous system 2. Psychogenic Pain Psychogenic pain is the reporting of pain attributable primarily to psychological factors usually in the absence of any objective physical pathology that could account for pain. This term is commonly used in a pejorative sense and is not usually an effective method of describing a patient 5. Referred Pain Pain localized not to the site of its cause but to an area that may be adjacent to or at a distance from such a site is termed referred pain. For example shoulder pain can be caused by an diaphragmic irritations 6. Wind Up Wind up, means the second pain induced by a slow temporal summation of pain mediated by C fibres. It is caused by repetitive noxious stimulation slower than one stimulus every 3 seconds. Consequently the subject may experience a gradual increase in the perceived magnitude of pain 5. Classification of Pain Nociceptive pain arises from the stimulation of specific pain receptors. These receptors can respond to heat, cold, vibration, stretch and chemical stimuli released from tissue injury. Non nociceptive pain arises from within the peripheral and central nervous system. Specific receptors do not exist here, with pain being generated by nerve cell dysfunction 7. Figure 1: Classification of pain. Somatic Pain Musculoskeletal pain can occur as a result of injury in tissues such as: skin, muscle, joints, bones, and ligaments. Specific receptors (nociceptors) for heat, cold, vibration, stretch, inflammation and oxygen starvation are involved. A sharp and well localised pain can often be provoked by touching or moving the area or tissue involved 7. Visceral Pain Organs can be the cause of pain. Specific receptors (nociceptors) for stretch, inflammation, and oxygen starvation (ischaemia) can be involved. The pain perceived is often poorly localised, and may feel like a vague deep ache, sometimes being cramping or colicky in nature. It frequently produces referred pain to the back. Pelvic pain refers pain to the lower back, abdominal pain to the mid-back, and thoracic pain to the upper back 7. Nerve Pain Nerve pain occurs within the nervous system itself. The pain may originate from the peripheral nervous system or from the central nervous system. Nerve pain can be caused by: degeneration (multiple sclerosis, stroke, brain haemorrhage, and oxygen starvation), pressure or strain (trapped nerve), inflammation or infection. The nervous system does not have specific receptors for pain (non nociceptive). Instead, when a nerve becomes injured, its conduction becomes unstable, firing off signals in a completely inappropriate, random, and disordered fashion. This phenomen is also termed ectopic pacemaker or abnormal impuls generated sites (AIGS). The impulses then are interpreted by the brain as pain, and can be associated with signs of nerve malfunction such as hypersensitivity (touch, vibration, hot and cold), tingling, numbness, and weakness. There is often referred pain to an area where that nerve would normally supply (neurotome). Nerve pain is often described as lancinating, shooting, burning, and hypersensitive 7. Sympathetic Pain Sympathetic pain is caused by possible over-activity response of the sympathetic nervous system, and central or peripheral nervous system mechanisms. The sympathetic nervous system controls blood flow to tissues such as skin and muscle, sweating by the skin, and the speed and responsiveness of the peripheral nervous system. Sympathetic pain occurs more commonly after fractures and soft tissue injuries of the arms and legs but can be present in the pelvic area aswell. These injuries may lead to complex regional pain syndrome. CRPS was previously known as reflex sympathetic dystrophy. There are no specific pain receptors that induce CRPS but a disbalance of the nervous system may operate in CRPS. The hypersensitivity in the skin around the injury and also peripherally is associated with abnormalities of sweating and temperature control in the area. Functio leasi occurs with muscle atrophy, joint problems, contractures, and osteoporosis as a result. It is possible that the syndrome is i nitiated by trauma to the small peripheral nerves close to the injury 7. Taxonomies Related to Pain The taxonomy of chronic pain syndromes is a difficult subject. Bonica referred the language ambiguity as a modern tower of Babel 8. Taxonomy and classification of pain is important identifying target groups, conduct research and the approach of patients 5. The classification of pain can be expert based 9, anatomy based, duration based, etiologic 10, body system based 11, mechanism based 12 and/or based on severity using a scale model (VAS)13-16. Multidimensional sytems of pain classification exist and are proposed by the International Association for the Study of Pain Taxonomy. The IASP has published an expert-based multiaxial classification of chronic pain 2,3.

The Revolutionary War :: essays research papers

The Revolutionary War was an enormous part of American history. The revolution in Russia, that sparked the overthrow of communism, was a huge part of Russian history. The revolution of Christianity from the concepts of Greek gods was also a large part of religious history. Christianity and Greek gods have many comparisons, contrasts, and these contrasts resulted in Christianity being revolutionary. The concepts of Christianity and the religious concepts of the Greek gods are comparatively alike. To begin, in both religions, humans believe that there are speakers for their God/gods. Gods do not speak to mere mortals. These people are the priests who teach of the gods ¹ ways and wants. Some are fortune tellers or prophets, as they were called in Greek times, that foretell the future. For example, Tiriesias, in the plays Oedipus the King and Antigone, was a blind prophet who could see the future and foretell it to people. In Greek times the prophets were of high social status. Also, the people believe that their God or gods are above all human ranks. They believe a god is above all and listens to people when they need help. This is why humans pray to the God/gods for forgiveness. The two religious views also believe that the God/gods are watching over their followers. The God/gods decide either before or after a person ¹s life on earth where the person will live in the afterlife, depending on the person ¹s values. Both believe one would either go to a bad place, called Hell or Hades, or a good place, called heaven or the Elysian Fields. Likewise both believe in an afterlife that is eternally chosen. The ideas of the followers of Christianity and Greek religions are also very different. To begin, Christians believe in one almighty God. This is also known as monotheism. Christians believe this God gave the world his only son. When that son was put to death by a human, He told the people He would die to forgive their sins. This shows that God and His son were both caring and forgiving beings. They are respected by the followers of Christianity. God helps humans. Humans pray to this God for help and forgiveness. People also go to church to learn about their religion and to pay their respects to God. The church is thought to be God ¹s house. This is why people get dressed up and try to look nice when they are guests in God ¹s house. God and Jesus are thought to live in heaven. Greeks, however, are very different from Christians. They believe in many gods. This is also known as polytheism. These gods are mean and torture the

Interactive Cable Archives and Videoconferencing :: Technology Education Curriculum Essays

Interactive Cable Archives and Videoconferencing The integration of technology into curriculum and instructional practices in P-12 education has been gaining momentum in classroom reform across the nation (Mowre-Popiel, Pollard, & Pollard, 1994). Interactive and digital technologies are now recognized as tools by which educators can bring unique resources into the classroom (Schutte, 1998; Wise, 2002) and engage students in dynamic, self-constructed learning (Branzburg, 2001). The use of technology as a tool that supports instruction and learning is transforming the traditional way of teaching; both digital and geographically located resources now offer an enriched content that was not available to earlier generations (Branzburg, 2001). As a result, many authors and researchers believe that the use of technology within educational settings will serve to motivate students to learn more, both with and without teacher assistance, effectively promoting increased cognitive development (Gernstein, 2000; Wise, 2002). While there are many projects involving the utilization of interactive and digital technologies in classroom instruction (Buckle, 1995; Gernstein, 2000; Warner, 1999; Petersen, 1998), there is limited scientific evidence of its effectiveness in improving teaching and learning when compared to traditional instruction. In addition, there exists almost no literature that illustrates the impact of the combined effect of both digital and video resources. Purpose of the paper The purpose of this paper is to describe the developmental process used to create technology-infused curriculum and the methodology used to document the combined impact of the enriched curriculum and instruction on students’ affective and cognitive domains. In addition, preliminary findings of pilot studies, conducted during the summer and fall of 2003 will be presented. The curriculum unit under study consisted of a civics education unit on the â€Å"Power of the Presidency† prepared for use in grades 7-12 (AP). Technological resources included interactive cable archives and point-to-point videoconferencing. Review of Literature The late 1980’s ushered in a period of change in the American educational context, with a major focus on integrating technology in P-12 classrooms (Dwyer, Ringstaff, & Sandholtz, 1990). Several authors credit this continued use to the belief that technology integration supports philosophies of instruction that perceive each student as a unique learner, thereby aiding in the transformation of teacher-centered classrooms into student-centered settings (Mowre-Popiel, Pollard, & Pollard, 1994; Bork, 1997). Research has provided at least partial support for this belief. Multiple studies have shown that instructional technology enhances learning (e.g. Clouse, 1991-1992; Phillips & Soule, 1992). An early study of technology-supported instruction, conducted by the Educational Testing Service, found that students learned more quickly in a web-based environment, compared to traditional classroom settings (Ragosta, 1982).

Museum of Modern Art Essay

â€Å"The agenda for museums in the twenty-first century† by Harold Skramstad is concentrated on the historical aspects of the museums in the United States. He notices that museums were the great success of the American public education on the nineteenth century. During the twenty century museums stayed the important part of cultural landscape, and nowadays the concept of museums as the form of education is in demand. However, the social opinion considers museum as a passive and informal kind of education, and this issue needs correction, The chapter 16 â€Å"Museum Exhibitions and the dynamics of dialogue† by Kathleen Maclean is the attempt to analyze the role of the museums as the civic institutions and the contribution of exhibition, especially the temporary. The author mentioned the evolution of the very concept of museum, noticing the small facts, for example, the days when museum is closed, as the sign of class orientation, and mentioned that last time the museums became more democratic by their nature, Nowadays museums are ready for the dialogue with their visitors. At the very end on the chapter author mentioned that the number of museums constantly increases, unlike the number of money available for them. For this reason every curator of the museum should clearly understand the task of the museum in general and every exhibition in particular. It is necessary to understand the needs of museum visitors and their ability to understand and to learn in the museum. The excellent example of the museum with the definite task is the Museum of Modern Art.