Study On The Tangshan Earthquake

Study On The Tangshan Earthquake Throughout history there have been various natural disasters that have caused great destruction. One of these very disasters includes the Tangshan earthquake on July 29, 1976, below Tangshan City in the Hebei Province of northern China. The earthquake, measured at a magnitude of 7.5 lead to 242,400 deaths, with many severely injured. In addition, the city of Tangshan and surrounding regions faced infrastructure damages, including complete destruction of 97% of residential areas, 78% of industrial buildings and additional damage to railways, bridges, and roads. Statement of Aim This report will discuss the role of plate tectonics in the Tangshan earthquake. In addition, this report will cover the details of the earthquake pre-cursors, the main quake and aftershocks. Finally, this report will discuss the occurrence of destruction, casualties, relief response and response to similar events in the future. Plate Tectonics of North-East China It is important to develop some general knowledge what causes earthquakes, in order to gain a better understanding about the Tangshan event. Earths crust is broken into major tectonic plates that move towards and away from each other in different directions. Debated driving forces behind this movement includes Earths rotation, gravity related forces and mantle dynamics. Generally, it is accepted that tectonic plates are able to move because of the relative density of oceanic lithosphere and the relative weakness of the asthenosphere. While these plates are moving, they can collide or slide past each other creating high energy phenomena such as volcanoes and earthquakes. Specific to earthquakes, the edge of one plate is forced under another. This process is called subduction and results in intense vibrations in Earths crust. More specifically to Northeast China, the tectonic environment is driven by collisions between the Indian and Asian plates, and Pacific and Asian plates. An important component of the Tangshan earthquake is the role of an extensive strike-slip fault system, known as Tancheng-Lujiang, or Tan-Lu. This system extends in a north-northeast direction for more than 3,200 miles from the north bank of the Yangtze River in eastern China to the west across the Russian border. It is an intertwined zone of faults 5000km long and 1000km wide, neighbored by other sub-faults. These collectively played a significant part in what resulted in the Tangshan earthquake. In fact, the Tangshan earthquake sequence has been explained as the result of sequential ruptures of the Tangshan fault produced by NNE extensive faulting and associated NE-SW regional compression. The earthquake sequence then initiated at the bending region (near Tangshan City) due to continued tectonic stress that had been increasing for a long time. The relationship between the rupture geometries of the Tangshan earthquake sequence and the regional compression stresses. The Tangshan Event Pre-cursors Earthquakes have occurred in the surrounding area in the past, including 22 earthquakes of magnitude 4.75 or greater since 1485. Despite these previous activities, there were no foreshocks or clear precursory phenomenon prior to the Tangshan earthquake. However, there had been a series of abnormal signals observed in the regions of Beijing, Tianjin, Tangshan, Bohai and Zhangjiakou. Tangshan indicated that there was a consistent drop in the pumping rate (and hence groundwater levels) in the years before the event with a sharp increase in the days prior to the earthquake. Additionally, survivors interviewed following the earthquake noted that well water levels changed abruptly in the hours before the event e.g. with rises of over a meter in at least on village in the region. There was also strange animal behavior reported, including city dwellers from the downtown area who had fish discovered that the fish were restless, jumping out of the aquarium as if wanting to escape. Unfortunate ly the anomalous precursory phenomena were widely scattered and inconclusive. The main quake The main quake struck Tangshan at 3:42 am on July 28, 1976, and lasted approximately 23 seconds. This short lived quake was at an intensity of XI (out of XII), according to the State Seismological Bureau report, with a magnitude of 7.5 on the Richter magnitude scale. Although the epicenter was located in the city of Tangshan, the earthquake was felt in fourteen provinces of China, and as far as Xian, in Beijing and in Tientsin. The stress of the Tangshan quake was caused by the compression along the plate boundaries of the Indian and Asian plates, as well as the compression along the boundaries of the Pacific and Asian plates. The quake ruptured a five-mile (8 km) section of a 25-mile long fault that passes through the city Tangshan. In addition, along the west side the ground moved laterally for about five feet, in a north/northeast direction sub parallel to the major axis of the meizoseismic zone with some areas with horizontal ground displacements of up to 7 meters. On the eastern side of the rupture, the ground block tipped upward near the south end and downward at the northern end. Although the earthquake was a shallow focal depth of 15 kilometers, it created both horizontal and vertical movement, causing the ground to rent apart by several feet, cave in to form craters, previously flat agricultural land being undulated, and soil liquefaction. Aftershocks Following the main earthquake, the many aftershocks also had devastating effects. There were two major aftershocks which caused additional damage to the region. On July 28, 1976 at 6:45 pm local time an Mw 7.0 earthquake struck, centered in Shangjialin Luanxian to the northeast of Tangshan. This caused 50 km (31 mi) rupture along the Luanxian-Laoting fault. The second major aftershock of Mw 6.4 struck on November 15, 1976 at 9:53 pm local time, centered south of Lutai to the southwest of Tangshan. This aftershock ruptured 20 km (12 mi) of the Jing Canal fault. In all, over 850 aftershocks occurred through the end of 1978 and were distributed throughout an area approximately 140 km (87 mi) in length and 50 km (31 mi) in width along a northeast trend, indicating the Tangshan fault as the main fault rupture. Destruction and Casualties The destruction of the earthquake included 242,400 deaths; 164,600 people severely wounded; 3,800 people disabled; 360,000 people suffering minor injuries; and various damages to residential areas, industrial areas, roads, railways and sewage systems. Here, the report will examine what effects the earthquake had on infrastructure and casualties. Infrastructure Before the 1976 earthquake, scientists did not believe Tangshan was susceptible to a large earthquake. Thus, the seismic design code for the area was zoned an intensity level of VI and the buildings in Tangshan were not built to withstand such a large earthquake. Furthermore, the city of Tangshan is located in the center of an area surrounded with major faults, where many of its structures had been built on unstable, alluvial soils. The 7.8 earthquake that hit Tangshan was given an intensity level of XI and left hundreds of thousands of buildings destroyed. The infrastructure damage affected many different areas. Ninety-three percent of residential buildings and 78 percent of industrial buildings were completely destroyed. Eighty percent of the water pumping stations and fourteen percent of the sewage pipes were seriously damaged. In addition, the foundations of bridges gave way, bridges collapsed, railroad lines bent, closed roads were covered with debris, highway bridges and at least two dams collapsed, all telephone and radio communications systems stopped functioning and almost all of the irrigation wells became inoperative. The seismic waves of the earthquake spread the damage to various regions, such as Qinhuangdao and Tianjin, and a few buildings as far away as Beijing. As was the case in Tangshan city, earthquake resistance was not generally considered in the design of buildings in these other regions. Newer buildings with seismic capacity and any buildings strengthened after the 1975 Haicheng Earthquake performed much better during the Tangshan Earthquake than those designed without seismic design considerations. Casualty Along with infrastructure damage, there were devastating amounts of casualties. As mentioned earlier, the earthquake struck just before 4 am, when many people were asleep and unprepared. Before the earthquake, the total population of Tangshan city was approximately 1.2 million, with 2 million within 40 km (25 mi) of the epicenter. As mentioned earlier, the official death count from the earthquake was 242,400; however, other sources have cited the death toll to be as high as 655,000 to 779,000 people. Contributing to the high number of casualties was the structure of residential buildings. Most residential structures in Tangshan and surrounding rural regions consisted of older, single-story brick or stone wall homes with only few newer multi-story brick apartment buildings built in the 1960s. Due to this structure, many buildings collapsed because of the lack of proper connections between the walls and roof, as did many reinforced concrete and masonry industrial buildings with heavy roofs, weighing as much as 400 kg (890 lbs). Finally, another contributing factor to the high death toll was the density of buildings and population in Tangshan city being extremely high. This concentration contributed to the seriousness of the loss in particular because the source of the earthquake was directly beneath the city. Relief Response The earthquake disaster required both short-term and long-term response. To begin, the Chinese government refused to accept international aid from the United Nations, and insisted on self reliance. This required rescue workers accompanied by appropriate equipment in order to rescue people from the collapsed buildings, as well as a pre-established plan to coordinate the effort, which was made difficult since vehicular traffic brought the few clear streets to a standstill. Also, since most of the population lost their homes due to the infrastructure destruction, there was a great need for temporary shelters. Clearing of the debris did not begin in earnest until September 1981, leaving the vast majority of the population not being able to live in permanent housing until 1985. In addition, there was the need for long-term strategic planning. Much of this had to do with future design codes for the city. The Tangshan Earthquake led to a major update to the seismic design code, released in 1978. The study of the Tangshan Earthquake and its tectonic setting also resulted in the reclassification of hazard zonation of the Hebei province (particularly the Tangshan region). Updates to the code included performance criteria increases with the raising of expected ground shaking intensity, the introduction of a new understanding of how the liquefaction of underlying soils impacts building foundations, and the inclusion of increased vertical forces from seismic loads good building practice from the collapsed buildings in Tangshan. The earthquake also highlighted the requirement for redundancy in the provision of lifelines, accompanied by the assessment of the appropriate design standards to guarantee the minimum necessary function of roads, bridges, or utility supplie s which were greatly affected by the earthquake. The relief responses resulting from the Tangshan Earthquake created the opportunity to build and incorporate increased earthquake resistance for future seismic events. Moreover, the layout of the city was planned to reduce both the number of casualties and injured, in addition to increasing the efficacy of emergency relief and disaster rehabilitation. The 2008 Sichuan earthquake had the same measurement on the Richter scale at 8.0 in magnitude. It, however, occurred in a mountainous region where relief efforts were noticeably hampered by the geographical makeup of the land nearby. The Sichuan earthquake also had a much quicker and more organized response system than Tangshan, as the political, social and technological environment was different. Discussion Conclusion In summary, this report has presented many important concepts to gain an understanding about the Tangshan Earthquake. It has examined the underlying driving forces, such as the Tancheng-Lujiang fault system and Tangshan fault; the various effects from the precursors, main quake, aftershocks; the destruction and casualties from the disaster, including factors that lead to an increased death toll and infrastructure damage; the relief response to the disaster and how it affected future earthquake responses; and a discussion of how amateur seismologists and professionals made predictions about the Tangshan Earthquake. Discussing these topics brings awareness on the importance of understanding natural disasters, and how a population can learn and prepare itself for future natural disasters.

Film “Gothika” Essay

In the 2003 film â€Å"Gothika† Halle Berry plays a psychiatrist who loses her memory and wakes up in an insane asylum, the same one where she had previously been a staff physician. She is confused, disoriented and has lost time. Pete, a psychiatrist played by Robert Downey Jr. , is the doctor assigned to her care and Doug, her husband, had been the doctor in charge of the facility. Miranda, Berry’s character, eventually learns that her husband has been killed and that she has been arrested and charged with his murder (Kassovitz, 2003). From the very beginning, the movie pretends to psychology right. But unfortunately, it is largely just pretending. The first problem in the movie occurs with the description of Miranda’s psychotic break and the actions leading to it. The doctors caring for Miranda argue that her mental illness resulted from her accident, not the other way around. At first, they simply explain her illness as a traumatic amnesia brought on by the horror of murdering her husband. Or, they allege, the amnesia might be related to the head injury from the car accident and unrelated to her mental condition. Her doctor also asks her about drugs that she may have taken to cause the violence (killing her husband) or her amnesia. While it is appropriate to be concerned about a drug-related cause for amnesia (Merck, 2007) it is unreasonable to believe that those involved in her treatment would not have conducted blood tests to detect drug use prior to the questioning. The movie tells us Miranda has been out of touch with her mind for three days when she awakens in the asylum, so the mere idea that they would not have conducted blood tests and have the results back by then seems implausible. The next major mistake the movie makes in its portrayal of Miranda’s mental illness and treatment is that Pete is assigned to do her evaluation. While it can be argued that in some areas he might be the only doctor available, as one is dead and another accused of the murder, the story came before the reality of treatment standards in the movie. It seems as though Berry’s character may even recognize this as she tries to get a handle on her relationship with Pete, asking him if they had an affair or wanted to have one (Kassovitz, 2003). This immediately calls into question the ethics of the doctor and the accuracy of any judgment he makes regarding her condition. The film then tries to confuse the viewer with the question of whether Miranda is suffering some sort of psychotic break ro is truly being haunted by ghosts. From a diagnostic perspective, Miranda’s symptoms include the fugue when she was admitted, her loss of memory, and eventually, though she is loathe to admit this to her doctor, seeing and hearing her â€Å"ghost†. (Kassovitz, 2003). The film even goes so far as to have Miranda address her hallucination, saying â€Å": I am a rational person. I believe in science. I don’t believe in the paranormal, and I don’t believe in ghosts. But if you are the ghost of Rachel Parsons, can you let me out of this cell? † (Kassovitz, 2003). The professionals, upon hearing her tale of seeing ghosts, move right from a diagnosis of traumatic amnesia to a diagnosis of schizophrenia, skipping right part delusional. This is not accurate in the least. First, there is Miranda’s statement regarding her interaction with the ghost. She is still logical enough to know that interaction with a ghost is unreasonable and generally accepted as a mental dysfunction. â€Å"Schizophrenia is characterized by psychosis (loss of contact with reality), hallucinations (false perceptions), delusions (false beliefs), disorganized speech and behavior, flattened affect (restricted range of emotions), cognitive deficits (impaired reasoning and problem solving), and occupational and social dysfunction. † (Merck, 2007) If she were schizophrenic, it is unlikely that she would have retained her logical mind enough to realize that she was being illogical. The fact that her educated mind could still identify her behaviors as irrational is one of the clearest indicators that she was not suffering from the cognitive deficits associated with schizophrenia. Next, there is the appearance of the ghost herself. If Miranda’s delusions had been limited to fleeting images or auditory hallucinations, her symptoms would have been consistent with schizophrenia. However, the presence of an identifiable visual hallucination makes the illness more in line with the symptoms of delusional disorders than schizophrenia (Allpsych, 2007). â€Å"A delusion is a belief that is clearly false and that indicates an abnormality in the affected person’s content of thought. The false belief is not accounted for by the person’s cultural or religious background or his or her level of intelligence. The key feature of a delusion is the degree to which the person is convinced that the belief is true. A person with a delusion will hold firmly to the belief regardless of evidence to the contrary. Delusions can be difficult to distinguish from overvalued ideas, which are unreasonable ideas that a person holds, but the affected person has at least some level of doubt as to its truthfulness. A person with a delusion is absolutely convinced that the delusion is real. † (Mind Disorders, 2007). The simple truth is that if Miranda had been suffering from either of these mental disorders, her symptoms would have 1) been more extreme in the case of schizophrenia or 2) come with a total belief in her delusion. She would no longer question whether ghosts were real. The final implied diagnosis of the film is that Miranda has been suffering abuse at the hands of a sadistic and manipulative serial killer who also happens to be her husband. Once the ghost leads Miranda to her husband’s torture and abuse chamber, the viewer is left with the impression that Miranda’s mental illness including the delusion of seeing the ghost was her mind’s way of dealing with the threat from her husband and becoming strong enough to deal with his abuse. This is complete and utter Hollywood tripe. While it is possible for battered woman to lose control and kill her husband in a situation where she fears for her life, Miranda’s symptoms are completely out of sync with the typical description of BWS (McElroy, 2002). Most likely, this was an attempt by the writer to draw sympathy for the character that did, in fact, kill her husband. If the movie had intended to portray mental illness in an appropriate fashion, it simply would have to stop with the obvious ghost story. The problem was that the writer wanted to create a story in which a ghost was used to explain away mental illness or a mental illness was sued to explain away an encounter with the supernatural. Either way, they failed. By showing the viewer the ghost, the viewer does not question Miranda’s sanity. After all, we’ve seen it too. To be more in tune with the diagnosis they were most likely going for, schizophrenia, the movie should have relied on an unseen presence and given perfectly reasonable explanations for things that happen, i. e. show Pete leaving her cell unlocked so that she an escape and conduct her investigation. As it is, the film fails as a ghost story and fails as a psychological thriller. Had it been done properly, it could have succeeded at both. WORKS CITED â€Å"Delusions† , November 18, 2007. Kassovitz, Mathieu (Director) and Sebastian Guitierrez (Writer). â€Å"Gothika†. USA:Columbia Pictures, 2003. McElroy, Wendy. â€Å"Battered Women’s Syndrome: Science or Sham? † The Independent Institute, October 28, 2002< http://www. independent. org/aboutus/person_detail. asp? id=488> November 18, 2007. â€Å"Prognosis and Treatment†, November 19, 2007. Psychotic Disorders , < http://allpsych. com/disorders/psychotic/index. html>, November 18, 2007.

Maternal Nursing Essay

A tool for assessment of health service systems to support maternal health and child health Health during early childhood and pregnancy has long term and wide ranging impacts on the general health of populations. Promotion of good health in pregnancy and childhood are therefore critical activities of primary health care services. Health service systems need to be organised to meet the specific needs of maternal and child care alongside the other major aspects of these services, such as acute and chronic illness care. Health care organisations require practical tools to guide efforts and evaluate changes in maternal and child health. This ABCD Systems Assessment Tool was originally designed for assessing primary care systems support for chronic illness care. The tool is based on the structure, content and principles of the Assessment of Chronic Illness Care (ACIC) survey (Bonomi et al. , 2002) and on the Innovative Care for Chronic Conditions (ICCC) Framework (WHO 2002). We have now adapted the Systems Assessment Tool for use in quality improvement activities directed at maternal and child health (MCH). This adaptation is based on key policy reports and research papers relevant to the Australian Aboriginal and Torres Strait Islander primary care sector (see list on last page). As for the ABCD Systems Assessment Tool for chronic illness care, this MCH Systems Assessment Tool has been designed for use with health services for Indigenous Australian populations. However, it is expected to be appropriate with minor adaptation for many other settings. The intended purpose of the tool is to support ongoing quality improvement initiatives through systematic assessment of a range of elements of health service systems that have been demonstrated to be important. The tool provides for †¢ an assessment of the state of development of health service systems; †¢ guidance on next steps in planning improvements in maternal and child health care; †¢ assessment of progress in achieving system improvement. As for the ABCD Systems Assessment Tool, this MCH Systems Assessment Tool incorporates the guiding principles of the ICCC Framework: evidencebased decision making; population focus; prevention focus; quality focus; integration; and flexibility/adaptability. Version 2. 1 Last Updated 30/03/07 Activities and programs relevant to maternal and child health care can be considered in three areas: a) Clinical Services for maternal health through individual health promotion advice, clinical preventive care and the early detection of illness (includes antenatal and post natal clinics/screening, case finding, brief interventions/counselling – generally health centre based, one-to-one activities) b) Clinical services for child health through individual health promotion advice, clinical preventive care and the early detection of illness (including child health clinics, screening, growth monitoring, case finding, brief interventions/counselling – generally health centre based, one-to-one activities) c) Community or Population based programs/activities, ancillary programs for maternal and child health (eg programs or activities designed to promote nutrition, breastfeeding, physical activity, oral/dental health, mental health, environmental health, and to reduce harm from cigarette smoke or alcohol) Each of these three areas of activities is important in the effective prevention and management of maternal and child ill health and the prevention of chronic illness in later years. The quality of systems in place to support each of these three areas of activities or programs may differ quite markedly within the same health centre or health service. The scoring form for this tool provides for distinct scoring of how systems support each of the areas. The prompts provided in this tool are intended only as guidance to some of the sorts of system issues that one might consider for scoring each item of the tool. These prompts are not intended to cover all relevant issues for all services. While there may be some overlap, the elements of the MCH Systems Assessment Tool can be applied separately to the assessment of systems to support a) services for maternal health; and b) services for child health. The use of this tool provides a score for the state of development of different aspects of health centre systems. These scores may be used as a guide for where improvement efforts might be focussed. The scores should be seen as a guide only, and services should base their priorities on the range of information available and the opportunities for improvement in different areas. We will welcome suggestions or feedback from services which use this tool.

Cisplatine Subtypes And Breast Cancer - 1373 Words

)Platinum agents Platinum salts, including carboplatin and cisplatin, lead to DNA cross-link strand breaks, which may be especially important in cells that are deficient in homologous recombination repair mechanisms such as BRCA-mutated cells and TNBC. Leong and colleagues (Leong, et al. 2007).reported a p63-dependent tumor survival pathway that mediates cisplatin sensitivity, specifically in TNBC cells grown in vitro. Extending this observation to the clinical setting, Rocca and colleagues (Andrea, et al.2008).conducted a retrospective analysis of core biopsies of patients with breast cancer treated with neoadjuvant cisplatin-based chemotherapy in breast cancer and showed that administration of cisplatin without anthracyclines yielded a†¦show more content†¦CALGB40603 (NCT00861705) is a randomized phase II trial with a 2 Ãâ€" 2 factorial design that explored the addition of carboplatin  ± bevacizumab to neoadjuvant weekly paclitaxel followed by dose-dense AC in 443 patients with stage II /III TNBC (Sikov, et al. 2014) The pCR rate improved from 41% to 54% with the addition of carboplatin; bevacizumab had no added benefit. It is important to note that neither of these studies was powered to detect disease-free or overall survival (OS) benefit.( Ingrid et al.,2014) B) Capecitabine Several ongoing trials are addressing the intensification of adjuvant chemotherapy in TNBC patients, either through integration of novel agents into the adjuvant setting such as platinum, X, ixabepilone, or bevacizumab, or through introduction of maintenance therapy such as X (CIBOMA and SYSUCC-001) or bevacizumab (BEATRICE). Preliminary results of the CREATE-X (JBCRG-04) trial by the Japan Breast Cancer Research Group were presented at the 2015 San Antonio Breast Cancer Symposium (Toi, , et al.2016). The trial randomized 910 patients to observation versus 8 cycles of X therapy, and reported improved rates of 2-year DFS (87.3 vs. 80.5%; p = 0.001) and OS (96.2 vs. 93.9%; p = 0.086) with X. All of the observed benefit was driven by the improved outcome in the ER-