Saturday, January 25, 2020
Concepts in Disaster Management
Concepts in Disaster Management CHAPTER II LITERATURE REVIEW 2.1 Broader Views on Disaster Management 2.1.1 Definition of Disaster Disaster has been defined in some different ways. Indeed, there is no precise definition for a disaster (Eshghi Larson, 2008). In complete form, Emergency Events Database (EM-DAT) defines disasters as ââ¬Å"A situation or event which overwhelms local capacity, necessitating a request to the national or international level for external assistance, or is recognized as such by a multilateral agency or by at least two sources, such as national, regional or international assistance groups and the mediaâ⬠(Centre for Research on the Epidemiology of Disasters (CRED), 2004). Below et al. (2007) propose ââ¬Å"an accumulation of widespread losses over multiple economic sectors, associated with a natural hazard event, that overwhelms the ability of the affected population to copeâ⬠as a definition of a disaster. International Federation on Red Cross and Red Crescent (IFRC) defines a disaster as ââ¬Å"a sudden, calamitous event that seriously disrupts the functioning of a community or society and causes human, material, and economic or environmental losses that exceed the communitys or societys ability to c ope using its own resourcesâ⬠¦Ã¢â¬ (IFRC, 2008). van Wassenhove (2006) proposes ââ¬Å"a disruption that physically affects a system as a whole and threatens its priorities and goalsâ⬠as a definition of disaster, while Asian Disaster Reduction Center (ADRC, 2008) defines disaster as ââ¬Å"a serious disruption of the functioning of society, causing widespread human, material or environmental losses which exceed the ability of affected society to cope using only its own resourcesâ⬠, which is similar with Reliefwebs (2008) definition. Emergency Management Australia (EMA, 2008) defines disaster as ââ¬Å"a serious disruption to community life which threatens or causes death or injury in that community and/or damage to property which is beyond the day-today capacity of the prescribed statutory authorities and which requires special mobilization and organization of resources other than those normally available to those authoritiesâ⬠, while emergency is defined as à ¢â¬ËAn event, actual or imminent, which endangers or threatens to endanger life, property or the environment, and which requires a significant and coordinated response. (EMA, 2008). 2.1.2 Disaster Types With a wide variability of disaster definition, it is understandable to have different initial classifications for disasters (Eshghi Larson, 2008; Shaluf 2007a, b). Canadian Disaster Database (2008) categorises disasters into five different types as summarized in Table 1. Table 1. Disaster types (Source: Canadian Disaster Database, 2008) Disaster types Encompasses Biological Epidemic, infestation Geological Earthquake, landslide, tsunami Meteorological and hydrological Cold wave, drought, flood, hail/ thunderstorm, heat wave, hurricane/ typhoon, snow avalanche, storm surges, storm-freezing rain, storm-unspecified/ other, storm-winter, tornado, wildfire Conflict Terrorism, civil unrest Technological Accident-industrial, accident-other, accident-transport, fire, hazardous chemicals van Wassenhove (2006) proposes a metrics (see Table 2) to understand disasters. Table 2. Categorization of disasters based on van Wassenhove (2006) Natural Man-made Sudden-onset Earthquake, hurricane, tornado Terrorist attack, coup detat, chemical leak Slow-onset Famine, drought, poverty Political crisis, refugee crisis In general, Shaluf (2007a, b) categorises disasters into three types: Natural disasters, which are catastrophic events resulting from natural causes such as volcanic eruptions, tornadoes, earthquakes, etc. Man made disasters, which are those catastrophic events that result from human decisions. Hybrid disasters are those disasters that result from both human error and natural forces. In further detail, Shaluf (2007b) breaks down each type of disasters and gives examples and characteristics, as can be seen in Table 3. Table 3. Disaster types, taken from Shaluf (2007b) Disaster type Characteristics Sub-disaster Name of disasters Natural A natural disaster is a natural phenomenon; A natural disaster is an unplanned and socially disruptive event with a sudden and severe disruptive effect; A natural disaster is single event over which no human has control; The impact of natural disaster is localized to a geographical region and specific time period; The consequences of a natural disaster are felt at the place and time of its occurrence; The disaster can be a high-impact disaster (e.g. a flood) that has a greater direct effect on the community over a longer period; Rapid onset disasters include earthquakes, flash floods, hurricanes, volcanic eruptions, landslides, tsunamis, slow onset disasters, droughts, floods, and epidemics Natural phenomena beneath the earths surface Earthquakes Tsunamis Volcanic eruptions Topographical phenomena Landslides Avalanches Meteorological/ hydrological phenomena Windstorms (Cyclones, typhoons, hurricanes) Tornadoes Hailstorms and snowstorms Sea surges Floods Droughts Heat waves/ could waves Biological phenomena Infestations (locust swarms, mealy bug) Epidemics (cholera, dengue, ebola, malaria, measles, meningitis, yellow fever, HIV/ AIDS, tuberculosis) Man-made Characteristics of socio-technical disasters: A socio-technical disaster is a man-made event; A socio-technical disaster occurs in an organisation due to the interaction between internal factors and external factors; It arises suddenly: when the disaster occurs it does so as a shock; A socio-technical disaster is a complex system of interdependence; The impact of a socio-technical disaster sometimes transcends geographical boundaries and can even have trans-generational effects (e.g. Three Mile Island, Bhopal, Chernobyl); Socio-technical disasters do not always have their worst consequences at the point of occurrence; the worst effects can occur long after the event; Socio-technical disasters are characterized by a low probability/ high consequences event; Sudden-impact disasters (e.g. air/road/rail accident) are usually of short duration and have a limited direct effect on the local community; Socio-technical disasters arise not because of a single factor but of accumulated unnoticed events; Disaster involves management procedures which must be maintained, and management problems must be coped with under the conditions of a major technical emergency involving threats of injury and loss of life; Rapid onset disasters include fires, technological disasters, industrial accidents, and transportation accidents; An inquiry report is required Socio-technical Technological disasters Fire Explotions (munitions explosions, chemical explosions, nuclear explosions, mine explosions) Leakage Toxic release Pollutions (pollution, acid rain, chemical pollution, atmospheric pollution) Structural collapse of physical assets Transportation disasters Air disasters Land disasters Sea disasters Stadia or other public places failures Fire Structural collapse Crowd stampede Production failure Computer system breakdown Distribution of defective products Warfare National Civil war between armed groups in the same country Civil strikes Civil disorder Bomb threats/ terrorist attack Inter-national Conventional war War between two armies from different countries Sieges Blockades Non-conventional war Nuclear Chemical Biological Hybrid The characteristics of a hybrid disaster can be the characteristics of both man-made and natural disasters Natural and man-made events Floods ravage community built on known floodplain Location of residential premises, factories, etc., at the foot of an active volcano, or in an avalanche area Landslides Slightly different from those, EM-DAT (2008a) classifies disasters into three groups: Natural disasters Technological disasters Complex emergencies Regarding its scope in terms of sufferer number and/ or geographic areas affected, Gad-el-Hak (2008) distinguishes disasters into five categories as can be seen in Table 4. Table 4. Disaster scope in terms of number of victims and/ or geographic area affected (Source: Gad-el-Hak, 2008) Scope Category No. of sufferers Geographic areas affected Scope I Small disaster Or Scope II Medium disaster 10-100 persons or 1-10 km2 Scope III Large disaster 100-1,000 persons Or 10-100 km2 Scope IV Enormous disaster 1,000-104 persons Or 100-1,000 km2 Scope V Gargantuan disaster > 104 persons Or > 1,000 km2 While the definition of natural disasters and technological disasters are principally the same as those proposed by Shaluf (2007a, b), complex emergencies need a further exploration. Alballa-Bertrand (see Alballa-Bertrand, 2000) proposes the following definition for a complex humanitarian emergency or, in short, complex emergency: ââ¬ËA purposeful and unlikely neutral response, intended mostly to counteract the worse effects of the massive human destitution that derive from an overt political phenomenon, which takes the form of a violent, entrenched and long-lasting factionalist conflict or imposition with ultimate institutional aims. On the other hand, ReliefWeb (2008) defines a complex emergency as ââ¬Å"A multifaceted humanitarian crisis in a country, region or society where there is a total or considerable breakdown of authority resulting from internal or external conflict and which requires a multi-sectoral, international response that goes beyond the mandate or capacity of any single agency and/or the ongoing UN country program. Such emergencies have, in particular, a devastating effect on children and women, and call for a complex range of responses.â⬠While Complex Emergency Database (CE-DAT) (2008) defines complex emergency as all crises characterized by extreme vulnerability that display the following features: There exist the unwillingness or incapability of the government to give effective response, leading call for external assistance; Political oppression or armed conflict; Displacement; Increased mortality. 2.1.3 The Increasing Trend of Disaster Occurrences Lichterman (1999) predicts that the frequency of disasters and their effects seem to be increasing. By reviewing various related published sources from 1900-2005, Eshghi and Larson (2008) confirm Lichtermans prediction. A disaster leads to a severe trouble of society, including extensive human misery and physical loss or damage (Davis Lambert, 2002). Both natural and man-made disasters are likely to raise another five-fold over the next fifty years (from the year 2005) due to environmental degradation, rapid urbanization and the spread of HIV/AIDS in less developed world (Thomas Kopczak, 2005). More than 250 million people in the world are affected by disasters every year (IFRC, 2008). In the sense of natural disasters which are then divided into biological, geophysical, climatological, hydrological, and meteorological disasters -, CRED (see Scheuren et al., 2008) reports that there were 414 natural disaster occurrences (excluding biological disasters) in year 2007 which killed 16 847 persons, affected more than 211 million others and caused over 74.9 US$ billion in economic damages. Until year 2004, over 90 percent of natural disasters occurred in developing countries (United Nations ISDR, 2004). By including biological disasters and regrouping natural disasters into three different categories, as follows: Hydro-meteorological disasters: comprising floods and wave surges, storms, droughts and related disasters (extreme temperatures and forest/scrub fires), and landslides avalanches; Geophysical disasters: earthquakes tsunamis and volcanic eruptions fall into this category; Biological disasters: consisting of epidemics and insect infestations; International Strategy for Disaster Reduction (ISDR) (2008) provides data which shows that there is an increasing trend on the occurrences of natural disasters from 1900 to 2005, as can be seen in Table 5. Table 5. Distribution of natural disasters: by origin (1900-2005, by decades*) *) 2000-2005, six year period The increasing trends of the occurrences of natural disasters between 1900-June 2008 is also documented in EM-DAT (2008b). Regarding the victims, there were 3,470,162,961 people affected by natural disasters for the period of 1991-2005 with a total of 960,502 deaths. Most of the victims (98.1% of people affected and 92.1% of people killed) were located in developing countries and least-developed countries (IFRC, 2008). 2.1.4 Disaster Management Disaster management also known as emergency management (Reliefweb, 2008) is defined as comprehensive approach and activities to reduce the adverse impacts of disasters (Reliefweb, 2008), while disaster operations could be considered as the set of activities that are performed before, during, and after a disaster which are aimed at preventing loss of human life, reducing its impact on the economy, and returning to a normal situation (Altay Green III, 2006). Using the terminology of disaster relief operations (DRO) as substitute to disaster operations, Pujawan et al. (2009) state that DRO consists of a variety of activities such as assessing demands, acquiring commodities, finding out priorities as well as receiving, classifying, storing, tracing and tracking deliveries. Regarding its phases, disaster management could be divided into four phases (Altay Green III, 2006): disaster mitigation, disaster preparedness, disaster response, and disaster recovery. 2.1.5 The Importance of Logistics in Disaster Management Logistics could be defined as follows (see Sheu, 2007a: 655): ââ¬Å"Logistics is the process of planning, implementing, and controlling the efficient, effective flow and storage of goods, services and related information from the point of origin to the point of consumption for the purpose of conforming to customers[] requirements at the lowest total cost.â⬠Its system operation consists of network design, information, transportation, inventory, warehousing, material handling, and packaging (see Wu Huang, 2007: 429). There are several Operational Research (OR) techniques utilised in logistics context, including the use of transportation model to determine the location of warehouses and the use of assignment/ allocation model to locate production facilities (Slats et al., 1995: 12), to name a few. In particular, humanitarian logistics could be defined as ââ¬Å"the process of planning, implementing and controlà ling the efficient, cost-effective flow and storage of goods and materials, as well as related information, from point of origin to point of consumpà tion for the purpose of meeting the end beneficiarys requirementsâ⬠(Thomas Mizushima, January 2005). Similarly, Thomas and Kopczak (2005) define it as ââ¬Å"the process of planning, implementing and controlling the efficient, cost-effective flow and storage of goods and materials, as well as related information, from the point of origin to the point of consumption for the purpose of alleviating the suffering of vulnerable peopleâ⬠. Whereas Sheu (2007a) proposes ââ¬Ëââ¬Ëa process of planning, managing and controlling the efficient flows of relief, information, and services from the points of origin to the points of destination to meet the urgent needs of the affected people under emergency conditions as a definition of emergency logistics. Moreover, disaster relief is usually put aside for sudden upheavals such as natural disasters (earthquakes, avalanches, hurricanes, floods, fires, volcano eruptions, etc.) and very few man-made disasters such as terrorist acts or nuclear disasters (Kovà ¡cs Spens, 2007). Relief itself could be understood as ââ¬Å"assistance and/or intervention during or after disaster to meet the life preservation and basic subsistence needs. It can be of emergency or protracted durationâ⬠(Reliefweb, 2008). It has been already generally well-known that logistics play a vital role in emergency management. Sheu (2007a) declares that, due to the possibility of disasters occurrences anytime around the world with huge effects, emergency logistics management had appeared as a worldwide-noticeable subject matter. People which are affected by disasters and are uprooted from their rights for food, housing, livelihood and other means of supporting themselves need the delivery of food, medicine, tents, sanitation equipment, tools and other necessities (Whybark, 2007). The science of logistics and supply chain management is becoming more vital for humanitarians (van Wassenhove, 2006), and ââ¬Å"the subject of disaster management is an absolutely fascinating one that is growing in importanceâ⬠(van Wassenhove, 2003: 19). Oloruntoba (2005) states that, regarding the Indian Ocean tsunami context, the scale of damage and subsequent response lead to problems of coordination, transportation and dis tribution among responding groups. In other affected areas of the Indian Ocean tsunami, Thomas (summer/fall 2006) reports that, at the 60-day point, regardless of the enormous relief efforts, only 60% of the families reported receiving well-timed and sufficient aid. It is therefore acceptable to conclude that good logistics planning plays an important role to the success of an emergency program (Davis Lambert, 2002: 109). Humanitarian logistics is essential to disaster relief for some reasons (Thomas Kopczak, 2005): It is crucial to the effectiveness and speed of response for main humanitarian programs, such as health, food, shelter, water, and sanitation; It can be one of the most expensive elements of a relief effort as it includes procurement and transportation; Since the logistics department handles tracking of commodities through the supply chain, it is often the repository of data that can be analyzed to offer post-event knowledge. In his paper, McEntire (1999) states that the disaster studies must discover ways to improve the provision of relief after certain catastrophe hits. This statement is in line with Perrys (2007) finding which accentuates the availability of logistician cadres as a key element of disaster response, as part of needs assessment and for procuring, transporting, and distributing the relief provisions. Regarding the relief of the Indian Ocean tsunami, the humanitarian organizations providing those relieves acknowledged that relief can and needs to be faster and more efficient (Thomas, 2005). Together with hurricane ââ¬Å"Katrinaâ⬠disaster, the Indian Ocean tsunami lead to the gap of ââ¬Å"the inability to connect the aid provided with the aid receivedâ⬠(Thomas, 2005) in spite of the unprecedented giving during those two misfortunes. It is also pointed out by Tolentino Jr. (2007) that the Indian Ocean tsunami has provided the will to radically improve disaster management and pl anning, an issue Trims (2004: 224) research agrees with, in a broader disaster relief context. Furthermore, the development of new technology for track/trace and disaster relief supply chains is proposed as one of ways to improve the delivery of humanitarian relief (Baluch, 2007). In the context of the participation of non-governmental organizations (NGOs) in worldwide emergencies (e.g. volcanic eruptions, earthquakes, floods, war), Beamon and Kotleba (2006) point out that the capability of an NGOs supply chain and logistics operations directly influences the success of a relief effort. Whereas Pujawan et al. (2009) propose information visibility, coordination, accountability, and professionalism as successful requirements of logistics for DRO. 2.2 Some Previous Works in Logistics Management The following paragraphs will give a short overview on several aspects in logistics management, especially those which are perceived as having relevance with the current research. They include distribution network design problem, location-allocation problem (LAP), vehicle routing problem (VRP), and location-routing problem (LRP), respectively. 2.2.1 Distribution Network Design Problem Citing Chopra (2003), distribution can be seen as ââ¬Å"the steps taken to move and store a product from the supplier stage to a customer stage in the supply chainâ⬠. While distribution networks can be defined as ââ¬Å"networks that carry the flow of some commodity or entity, using a routing rule that is intended to be effective and even optimalâ⬠(Whittle, 2007), and distribution network itself could be viewed as similar with the terminology producer network (Ambrosino Scutellà , 2005: 611). Distribution network design problem tackles the issues of optimizing the flows of commodities through an existing distribution network as well as improving the performance of the existing network by selecting the most appropriate setting of the facilities in the network aimed at satisfying the companys goal at one hand and minimising the overall costs at the other hand (Ambrosino Scutellà , 2005: 611). It involves facility location, transportation and inventory decisions (Ambrosino Scutellà , 2005: 611). In other words, the aim of distribution network design problem is on deciding the best way of moving goods or products from resource/ supply points to destination/ demand points which is performed by determining the structure of the network, in a such a way that the customer demands are satisfied and the total distribution costs are minimized (Ambrosino et al., 2009: 442). In Amiris (2006: 567-568) paper, distribution network design is stated as involving the simultaneous decis ions on the best settings of both plants and warehouses and on the best strategy in the sense of product distribution from the plants to the warehouses and from the warehouses to the customers, respectively. Meanwhile, the term ââ¬Å"distribution system designâ⬠refers to ââ¬Å"the strategic design of the logistics infrastructure and logistics strategy to deliver products from one or more sources to the customersâ⬠(Goetschalckx, 2008: 13-1) and similar to Ambrosino et al.s (2009) statement on distribution network design problem focuses on five phases of interconnected decisions, as follows (Goetschalckx, 2008: 13-2): Establishing the appropriate quantity of distribution centers (DCs); Setting up the location of each DC; Allocating customers to each DC; Allocating appropriate commodities to each DC; and Determining the throughput and storage capacity of each DC. Various models and approaches that have been built for designing distribution system or distribution network, to name a few, are (Goetschalckx, 2008: 13-8-13-15; Lapierre et al., 2004): K-median model, location-allocation model, warehouse location model, Geoffrion and Graves distribution system design model, models that focus on mathematical description of cost functions on each route in order to incorporate returns to scale, models of which concentration are in shipments on hub-to-hub routes regarding discounts, and models that aim at solving the freight transportation problem precisely. 2.2.2 Location-Allocation Problem (LAP) As previously stated in Goetschalckx (2008), LAP could be seen as part of distribution network design problems. Given the place of a set of customers with different demands, LAP is concerned with the selection of supply centres positions dedicated for serving the customers as well as the decision of the allocation of the customers to supply centres, with both of them are aimed at optimizing a given criterion (Hsieh Tien, 2004: 1017). It is also assumed that there is no interaction among supply centres. The criterion could be single such as transportation costs (see, for example, Goetschalckx, 2008; Zhou Liu, 2003; Manzini Gebennini, 2008) or it may comprises several aspects (see, for example, Mitropoulos et al., 2006). The following paragraphs provide some previous researches on LAP. The un-capacitated-type LAP with rectilinear distances could be found in Hsieh and Tien (2004). In this paper, the authors propose a heuristic method which is based on Kohonen self-organising feature maps (SOFMs). Sometimes distribution networks are built in hierarchies, where high-level distribution channels are constructed in straight lines from which low-level channels stem. Furthermore, destinations are allocated to branching facilities in high-level channels through low-level channels. Due to cost considerations, the number and locations of branching facilities as well as the allocation of the destinations to the aforementioned branching facilities need to be determined correctly. Eben-Chaime et al.s (2002) paper addresses this type of problem by formulating appropriate mathematical optimisation models and subsequently proposing heuristic solution methods. Capacitated LAP with stochastic demands is addressed by Zhou and Liu (2003). More specifically, they propose three types of stochastic programming models: (1) expected value model (EVM), (2) chance-constrained programming (CCP), and (3) dependent-chance programming (DCP). To solve these models efficiently, the authors develop a hybrid intelligent algorithm within which three type stochastic simulations are used. The proposed algorithm integrates the network simplex algorithm, stochastic simulation and genetic algorithm. In more recent paper, Zhou and Liu (2007) address the LAP with fuzzy demands by developing three types of fuzzy programming models fuzzy expected cost minimisation model, fuzzy -cost minimisation model, and credibility maximisation model with respect to different decision criterion. To solve these models, the authors apply a hybrid intelligent algorithm developed previously (see Zhou and Liu, 2003). Nonetheless, instead of using stochastic simulations, they are developing and employing fuzzy simulations. Similar with the abovementioned paper, Wen and Imamura (2008) also address LAP with fuzzy demands. For this type of problem, they build a fuzzy -cost model under the Hurwicz criterion. The problem is subsequently solved using the same algorithm as in Zhou and Liu (2007). The establishment of mixed integer programming optimisation models for multi-period, multi-stage LAPs could be found in Manzini and Gebennini (2008). In their paper, the authors develop optimisation models each for the following classes of multi-period, multi-stage LAPs: (1) single-commodity, multi-period, two-stage LAPs, (2) multi-commodity, multi-period, two-stage LAPs, (3) single-commodity, multi-period, two-stage open/ closed LAPs, and single-commodity, multi-period, three-stage LAPs. The application of various search methods to a generalised class of LAPs known as multi-facility location problem with generalised objects (MFLPO) is presented by Bischoff and Dà ¤chert (2009). The end of the paper gives comparison of the involved search methods for various sizes of test problem. Research on LAP in health service context could be found in Harper et al. (2005) and Mitropoulos et al. (2006). The former addresses the need to plan health services which takes geographical aspects into consideration. The problem is formulated as a stochastic LAP. The latter paper, on the other hand, develops a bi-objective model to solve the LAP arise in determining the location of hospitals and health centres and the allocation of the patients to those facilities. 2.2.3 Vehicle Routing Problem (VRP) In its most basic form (e.g. Bulbul et al., 2008; Laporte, 2007), VRP is concerned with the optimal delivery or collection routes for a limited number of identical vehicles with limited capacities from a central depot/ warehouse to a set of geographically scattered customers. It assumes that the vehicles are at the central depot/ warehouse initially. It also requires the existence of the routes that connect the central depot/ warehouse to customers and customers to customers as well. In this type of VRP, a route must start and finish at the depot and a customer is visited by exactly one vehicle. The total demand of customers served by one vehicle could not exceed the vehicles capacity, and the ultimate goal is to minimise the total routing costs. Since its introduction by Dantzig and Ramser in 1959 (Bulbul et al., 2008), it has given rise to a rich body of works (Laporte, 2007). In 2008, searching the words vehicle routing problem by using Google scholar search results more than 21,700 entries (Golden et al. (eds), 2008). Laportes (1992) paper provides various exact methods and heuristics developed to solve the VRP. Several meta-heuristics intended to solve the classical VRP could be traced from his more recent paper (2007), while Toth and Vigos (2002) paper presents various existing exact algorithms for the solution of classical VRP. The comparison of descent heuristics, simulated annealing, and tabu search in solving VRP is addressed by Van Breedam (2001). Jozefowiez et al. (2008), on the other hand, give a survey on works that have been carried out on multi-objective VRP. A range of VRP variants can be seen in Crainic and Laporte (eds., 1998), Bulbul et al. (2008), and Golden et al. (eds., 2008). Other variants also exist: VRP with stochastic demands and VRP with backhaul. Different classification of VRP could be found in Pisinger and Ropkes (2007) paper. The following sub-sections mention examples of works on some of them, while new directions in modelling and algorithms for various types of LRP could be found in Part II of Golden et al.s (eds., 2008) edited book. 2.2.3.1 VRP with Time Windows In this type of VRP, customer i may only be visited within a time window [ai, bi] (see, e.g., Kontoravdis Bard, 1995; Badeau et al., 1997; Bouthillier Crainic, 2005; Fà ¼genschuh, 2006; Hsu et al., 2007; Kim, et al., 2006; Dondo Cerdà ¡, 2007; Kallehauge et al., 2007). 2.2.3.2 VRP with Pickup and Delivery When the vehicles need to deliver commodities to customers and collect items for example, defective products from them as well, then this is called a VRP with pickup and deliveries. Research papers by Nagy Salhi (2005), Wassan et al. (2008), Wassan et al. (2008), Gribkovskaia et al. (2008), Hoff et al. (2009), and Ai Kachitvichyanukul (2009) are several examples on it. 2.2.3.3 VRP with Backhaul In this type of VRP, the customers are separated into two mutually exclusive subsets so that the first subset of customers receives commodities whereas the second one sends back the products. Additionally, the second subset of customers are only served after the first one. The first subset is called line-haul customers and the second one is named backhaul customers. The f
Friday, January 17, 2020
Transformational leader vs. transactional leader
In order to accept or reject the statement ââ¬Å"Do you see your choice as transformational leader vs. transactional leader in line with the above statements by William and Susan Bridges?â⬠, one has to study in details. Transformational leaders encourage others to perform better than they originally planned and frequently even better than they considered potential. Such leaders set more demanding expectations and classically attain higher performances. According to Bridges (2000) transformational leadership is an opening out of transactional leadership while transactional leadership highlights the transaction or exchange that takes place among leaders, colleagues, and followers. This exchange is founded on the leader conversing with others what is essential and identifying the conditions and rewards these others will obtain if they accomplish the necessities. Proper transformational leaders lift the level of moral development of those whom they lead. They convert their followers into leaders. They expand and enlarge the wellbeing of those whom they lead. They encourage their associates, colleagues, followers, customers, and even their bosses to go further than their personal self-interests for the good of the group, organization, or society. Transformational leaders concentrate on each follower's intellect of self-worth in order to engage the follower in true dedication and contribution in the endeavor at hand. This is one of the things that transformational leadership inserts to the transactional exchange. Transformational leadership is more effectual than transactional leadership in producing the additional attempt, pledge, and contentment of those led. Transformational leaders perform better with colleagues and followers than set up effortless exchanges. They act in manners to attain higher outcomes by employing one or more of the four components of transformational leadership. First, leadership is viewed through rose-tinted glasses when followers search to recognize with their leaders and imitate them. Second, the leadership motivates the followers with confront and influence that present connotation and understanding. Third, the leadership is rationally inspiring, expanding the followersââ¬â¢ use of their capabilities. Lastly, the leadership is independently caring, providing the followers with facilitation, mentoring, and coaching. Transactional leadership takes place when the leader rewards a follower based on the competence of the follower's recital. Transactional leadership depends on dependent underpinning, either optimistic reliant reward or the more unenthusiastic active or passive shapes of management-by-exception. (Bridges, 2000) It is concluded that transformational leadership supports to transactional leadership in its effects on follower contentment and recital. Transformational leadership does not substitute transactional leadership. That is, productive and in particular remedial connections may have only minor impact on followers unless accompanied by one or more components of transformational leadership for getting the most out of transactions. Hence the statement is accepted. References Bridges, William, and Susan Mitchell Bridges ââ¬Å"Leading Transition: A New Model for C
Thursday, January 9, 2020
Ethical Dilemmas Of Human Services And Research - 959 Words
Ethical Dilemmas as it pertains to Professionalism in Human Services and Research A psychology professor working for a university, who is also a psychologist with a private practice offering his students therapy sessions can contribute to problems, as well as violate several ethical codes, which will be discussed. It is not abnormal a college professor in psychology would offer his students therapy sessions, since therapy and psychology coincide and are both the professorââ¬â¢s specialties, however the ethical aspect of it is a different problem. The violation of these codes will take into consideration location, timing, competence, business interest, improper termination, harm, multiple relationships, and so forth. The location of the university where the professor works is in a large metropolitan area. According to code 2.02, psychologist who are not assigned to specific work should only provide services in the case of emergencies, this also includes if there are no other services available at the moment an incident occur (American Psychological Association, 2002). In this particular situation the professor violated the code because there were no emergencies and the professor did not mention any other services available to the students. Considering the university is located in a large metropolitan area typically, there should be numerous mental health services nearby. Lastly, the situation at hand also plays a role in the professorââ¬â¢s competence. Competent psychologists knowShow MoreRelatedEthical Dilemm Ethical And Ethical Dilemmas1610 Words à |à 7 PagesEthical dilemma is an issue that has no satisfactory resolution. A conflict between two ethical standards and situations can result in ethical dilemma. The ethical behavior of an individual is determined by the cultural norms and the societal norms. This develops a sense of right and wrong which helps in decision making. Failure to make proper decision due to ethical conflict results in ethical dilemma. This is a critical decision making criteria that create the complex situation in the patientââ¬â¢sRead MoreThe Principles Of The Code And The Guide1539 Words à |à 7 PagesThe objective of the Code is to lay out the ethical commitments made by the aged care systems in addition to the legal obligations that have to be complied. The main aims of the code is - identify and lay out the values that are the basis of the conduct and practice of Aged Care facilities provided under the Aged Care Act; - Clearly lay down the organizationââ¬â¢s commitment towards providing care in a manner that is fully respectful of basic human values and its obligation to continuous improvementRead MoreEthics And Morals Of Social Work Practice1068 Words à |à 5 PagesThe fundamental concern for social work is to understand how these aspects affect the individuals. Applying normative ethical theory, processes of ethical analysis. Virtue ethics concerned with the character of the person, instead of their action. Aristotle and Thomas Aquinas were supporters of this theory. This theory focuses on individual s disposition as the key factor of ethical reasoning instead of the principles regarding the deeds as they are. Eudaimonism a classical form of virtue ethicsRead MoreEthical Issues Of Social Work Practice1093 Words à |à 5 PagesUnit 17: Topic: Ethical issues in Social Work Practice. Our everyday interactions are underpinned by ethics. Social work in its sectors deals with people in multiple and complex situations. Social workers largely work with people who are affected by different life aspects such as ethnicity, disabilities and culture. The fundamental concern for social work is to understand how these aspects affect the individuals. Applying normative ethical theory processes of ethical analysis Virtue ethics concernedRead MoreEthical Values in Social Work Essay example1381 Words à |à 6 Pagesvalues and ethical dilemmas What are values, ethics, ethical dilemmas and a code of ethics? Values relate to principles and attitudes that provide direction to everyday living. Values also refer to beliefs or standards considered desirable by a culture, group or individual (AASW). Similar to values, but slightly different, ethics means a system of beliefs held about what constitutes moral judgement and right conduct, they are moral principles (rules, guides) (AASW). So an ethical dilemma is thenRead MoreThe Trials Of The Nuremberg1630 Words à |à 7 Pagesmedical ethics and human rights specifically about human research subjects. The defendants in the trials include Nazi leadership, physicians, and investigators prosecuted for conducting unethical and inhumane medical experiments on civilians and prisoners of war resulting in extreme pain, suffering, permanent injury and often death. The Nuremberg Code, borne of these trials, establishes ethical guidelines for human experimentation to ensure the rights of subjects in medical research. Herein, thisRead MoreMovie Review : Wit ( 2001 )1074 Words à |à 5 Pageswe will encounter such situations wherein we come across those patients who have been terminally ill and as nurses we need to guarantee that we can promote life and protect our patientââ¬â¢s interest. There will come a time when we might face some ethical dilemmas regarding our care for our patients that makes it difficult for us to morally decide on which action to take. But as nurses, we follow professional guidelines which help us in deciding which action is morally right and to ensure that the patientsRead MorePersonal Values Paper950 Words à |à 4 Pagespart in our lives. The development of our personal values is an ongoing process, and is subject to change based on what we feel is most important to us. Life is full of twists and turns and may cause us to readjust our priorities. However, as a human service professional it is important to understand what our values are and how we can benefit those that we serve. I value doing things that help me live a healthier lifestyle. I understand that it is important to take care of myself by eating healthyRead MoreThe Core Value Of Social Justice Essay1704 Words à |à 7 Pages Social Justice Similarly, the core value of social justice is defined in the context of ethical principles as that of social workers challenging social injustices. In working with a client like Vivi, a moral dilemma would arise which would have the potential to affect society as a whole by depriving others of the peace, equality, and treatment deserved by all human beings. Also, as a federally mandated reporter, a workers professional ethics and an individualââ¬â¢s personal set of standards can becomeRead More Will the Real Lupe Garza Please Stand Up? Essay1216 Words à |à 5 PagesAn ethical dilemma is defined as a moral issue, where a situation has two equivalent undesirable alternatives and neither choice will resolve the ethical predicament. Lupe Garza, mother of two children, is a temporary employee at a plant. Garza is an excellent and talented worker, and supervisors have taken notice in her skills. A human resource specialist named Sara Jones, mislead Garza in thinking she would unquestionably obtain a permanent job position at the plant, causing Garza to turn down
Wednesday, January 1, 2020
the kid - 795 Words
Running Head: COMMUNICATION VIA ââ¬Å"THE KIDâ⬠1 Interpersonal Communication as lost from the movie ââ¬Å"The Kidâ⬠COMMUNICATION VIA ââ¬Å"THE KIDâ⬠2 The interpersonal communication in the movie ââ¬Å"The Kidâ⬠is unique in some aspects. Russ, the middle aged character, has an indifference to everyone he communicates with at the beginning of the movie. As the movie progresses, you can see how Russââ¬â¢s interpersonal communication skills slow evolve from that indifference, impersonal and high context person to one of low context with manner principles and most aware of those he is actually communicating with. Russââ¬â¢s mannerisms and communication with others at theâ⬠¦show more contentâ⬠¦He even goes so far as to have a one on one conversation with a person he had only briefly spoken with earlier in the film. Showing you how his interpersonal skills are evolving. How he communicates with a close friend, opening up more and even showing some emotion. It is not seen much within the movie and just shows the viewer how communication with a stranger, yet someone close is achieved. Russ in the beginning is loud, boisterous and challenging. He is aloof with most of the characters in the movie. As he starts to communicate more with his younger self, he begins to this change. You see how his tone changes with the characters. How is not so aloof and his voice becomes even toned (with the right amount of inflexion) with most people. Then at the end, his voice is soft where is should he, you donââ¬â¢t hear him raising his voice and you can even catch a bit of emotion more in his voice. Russ even gets physically close to other characters. Giving hugs and showing more affection towards those he is truly close to. Something you did not see throughout most of the movie. You can look at the culture within the movie. How people communicate with each another, be it with the opposite sex, or adult to child. How Russ speaks with his assistant Janet, is a bit different then how he talks to Amy, the love interest in the movie. It goes back to the boss and employee, yet they are a bitShow MoreRelatedEssay on Billy The Kid692 Words à |à 3 Pages Billy the Kid nbsp;nbsp;nbsp;nbsp;nbsp;Billy the Kid is one of the most famous outlaws in American history. He has been a widely told figure in American history as well as folklore. The have made movies from his history and have also wrote many books on him. Most of Billy the Kids life remains a heated controversy throughout America. nbsp;nbsp;nbsp;nbsp;nbsp;Billy the Kid was born in New York City on November 23, 1859 to William and Kathleen McCarty Bonney and given the name William HRead MoreThe Effects Of Making Your Child A Latchkey Kid1343 Words à |à 6 PagesThese children are called latchkey kids; terminology first used in the 1940s during World War II, when women had to work because their husbands were deployed. Latchkey meaning the key to the house is often strung around the childââ¬â¢s neck or hidden under a mat near the door. Even though this seemed to be a required thing at the time, there are many negative effects of making your child a latchkey kid. Children who are left alone after school, classified as latchkey kids, are more susceptible to violentRead MoreButch Cassidy And The Sundance Kid1190 Words à |à 5 PagesButch Cassidy and the Sundance Kid was released in New York on September 24, 1969. The film received mostly negative reviews but became a success throughout the public. Eventually the National Film Preservation Board deemed the film culturally and artistically significant and itââ¬â¢s central themes and heros resonated with the youth movement of the time. The importance of the movie is what it came to represent to the people who saw it. While the director, George Roy Hill used the chase of the main charactersRead MoreAn Analysis Of Charles Hatfield s The Smartest Kid On Earth Essay1524 Words à |à 7 Pageswho elevates comics because of the number of literary awards his work has received. Ware got his start in the 1991 in RAW Magazine, continuing his work in his series Acme Novelty Library. One of his most notable comics is Jimmy Corrigan: the Smartest Kid on Earth. Readers learn to appreciate his comics on a higher level because they cannot rush through his work. Itââ¬â¢s complexity is a result of his use of text, diagrams, and pacing. Comic readers value Wareââ¬â¢s artistry because they have to work for understandingRead MoreAnalysis Of The Poe m Radiohead 1745 Words à |à 7 Pagesagree with. Just as the song, or album, may be a turning point or realization for yourself, this album was a major change for Radiohead. While the nature of their lyrics were always quite glum, tackling taboo topics, the sounds and background music in Kid A were quite different from their album before. The new use of synths and electronic music was starkly different from their prior usage of guitars, bass, and drums. Essentially, Radiohead made this album as a test to find themselves musically. EvenRead MoreShould Kids Be Kids?992 Words à |à 4 PagesLet kids be kids, is a well-known statement that is used often around the world. This statement is meant to encourage the joyful care free nature of kids, although it isnââ¬â¢t always carried out. In todayââ¬â¢s society, kids are subjected to rigorous testing. over structured curriculums, and are generally over stressed due the demanding needs of education. Though, education is important, these needs have impacted vital learning skills and childrenââ¬â¢s overall health. Education has dramatically changed overRead MoreKids or No Kids Essay1038 Words à |à 5 PagesKids or No Kids Candance Bacco March 3, 2013 The title of my paper is called Kids or No Kids. Today married couples have a big decision on whether or not they want kids. I start out my paper by talking about how important this decision is and how it effects other people. Then I start to talk about all the pros of having kids. After that I point out all the cons of having children. The next part of the paper is all about the pros and cons of not having kids. As you will see there are a lotRead MoreAre Kids Healthy Kids?1976 Words à |à 8 PagesFit Kids Healthy Kids, teaches kids about physical literacy and the fundamental skills that will allow a kid to thrive on sports. It seeks to inform children and adult about the basic movements in sports. This will allow them be confident when participating in physical activity. Fit Kids Healthy Kids (FKHK) uses a holistic approach to teach kids about the various skills and have programs that can help to implement the program. Although FKHK can teach the leaders on how to run their programs, theyRead MoreKids Will Be Kids : Is No Longer The Case?992 Words à |à 4 Pagesthat children, friends, family, coworkers and employers endorse in their daily lives for the sole purpose to bully others? These words have been around for eons and did not have the same impact on society as they do today. The old clue shay ââ¬Å"kids will be kidsâ⬠is no longer the case. Americanââ¬â¢s became immune to these words as well as the associated behavior. Over the years society has failed in demanding young adolescents to become responsible adults. After all Federal law treats everyone as anRead More Kids Having Kids Essay700 Words à |à 3 Pagessay that it was an accident and they didnââ¬â¢t know think that anything would happen. If you have sex then you must know something can happen and you are risking having a child. If you decide to keep the child you must realize that your years of being a kid are basically over. You will have many more responsibilities as a teen with having a child then just a regular teen! You will have to get a job to support yourself as well as your child. That could even mean quitting school. à à à à à The solution to pregnancy
Tuesday, December 24, 2019
Is it Better to Be Happy or Free - 773 Words
Is it better to be happy or free? 1932, Aldous Huxley wrote about an idea of what the future might look like in six hundred years. Is in it crazy how the things that are going on in his fictional book, can be related to whatââ¬â¢s going on now in our society. Allot of things that are going on today, Aldous Huxley wrote in his book. For example the Obama care R.F.I.D microchip implant is a chip used in humans as big as a grain of rice that goes in the hand. The implantation of an R.F.I.D chip in all Citizens by a certain date and the chip allows the government to all your personal information and the rumor is that theyââ¬â¢ll even be able to control your income. In brave new world they have a conditioning center the year is A.F (After Ford) Human beings no longer produce living offspring instead, surgically removed ovaries produce ova that are fertilized in artificial receptors and Incubanated in designed bottles (Chapter 1). Aldous Huxley Brave New World where the society i s trying to create a perfect community where everyone is happy but by taking soma, basically there being controlled there being conditioned to do and want the things there supposed to, Mustapha Mond, one of the ten World Controllers he focuses on the Stateââ¬â¢s successful efforts to remove strong emotions, desires, and human relationships from society, According to what role youââ¬â¢re going to play in the society whether youââ¬â¢re going to a delta minus or an alpha plus, they condition to belong to one of five castesShow MoreRelatedIs Happiness the Purpose of Life?1317 Words à |à 5 PagesIn the play Three Sisters the character Vershinin says, ââ¬Å"Weââ¬â¢re not happy and we canââ¬â¢t be happy; we only want happiness.â⬠So, whatââ¬â¢s the purpose of life? Is it to be happy? Everyone has that desire, to have happiness. We even base our decision we by how it will affect our happiness. In our life we experience happiness and unhappiness, but we are oblivi ous as to what happiness is. What comes to mind when thinking of happiness? Is it pleasure, the thought of the good life, prosperity, or is it somethingRead MoreSummary Of Brave New World 880 Words à |à 4 Pagesof Truth and Happiness in the Brave New World Imagine living in a world where everyone is happy. One is free to have sexual intercourse with a partner of his or her choosing without any repercussion. However, there is a catch; one is required to be happy all the time. In the novel Brave New World, their society is controlled and everyone is forced to be happy. There are three characters that are not happy. Bernard who feels that he is an outsider and miss treated, John who is also known as the savageRead MoreHappiness and Epicurus Essay examples1438 Words à |à 6 PagesEpicurus taught the ethics of his philosophy in his school, that a person should live by the art of making life happy, and that prudence is the noblest part of philosophy(newadvent.org). Epicurus ideals for life intrigued people and they began to think that perhaps the ethics of Epicureanism had some truth behind it; a person should live his/her life to the fullest in order to become happy. Epicurus also made judgments on theology, logic and psychology. Througho ut the life of Epicurus and his teachingsRead MoreAnalysis Of Why The Caged Bird Sings871 Words à |à 4 Pagespoem, ââ¬Å"I Know Why The Caged Bird Singsâ⬠by Maya Angelou, one bird is free to fly happily and carefree while another is caged and can do nothing but sing for freedom. Written during a time period of social unrest, Maya Angelou uses literary techniques in this poem to effectively emphasize the impacts of racism in America. One literary technique used throughout the poem is tone. In stanza one, the tone is peaceful and happy as Angelou describes ââ¬Å"the orange sunraysâ⬠, while the bird ââ¬Å"leapsâ⬠,â⬠dipsâ⬠Read MoreAnalysis Of The Book Of Margins And The Woods 1194 Words à |à 5 PagesEveryday) According to Frazier ââ¬Å"In Praise of Marginsâ⬠, ââ¬Å"marginalâ⬠places and activities are valuable because they help people use their imagination, allowing them to free themselves. Margins could be anything from playing basketball, hanging out with friends, spending time alone, reading books, travelling, to anything that makes a person happy. Frazier gives a flashback to the place where he spent his childhood time and participated in foolish activity on ââ¬Å"The woodsâ⬠just for sake of doing them. He usedRead MoreLiving A True, Good And Happy Life897 Words à |à 4 PagesTo live a true, good and happy life, I personally believe that one would just need the natural things that would sustain them; natural things that would give someone a healthy, life that is certainly worth living. Now, there are some people who would argue that pursuing a life based on the standards of ââ¬Å"wanting what the universe wantsâ⬠. I can argue plentily that as humans, we hav e individual, diverse needs. The universe will not accommodate to all those nitpicky needs of ours. This, is preciselyRead MoreJohn Milton s Paradise Lost1047 Words à |à 5 Pagesto see that God doesnââ¬â¢t control peopleââ¬â¢s actions, and that instead we all have free will even though He does have the power to manipulate it. By including Satanââ¬â¢s side to the story as well as his fall, Milton is able to inform readers about the reason for the happy fall as well as include themes of pride, deceit, and communication. The idea of the happy fall successfully justifies the idea that people have obtained free will from Adam and Eveââ¬â¢s disobedience to God, and that God did plan the fall,Read MoreThe Story Of An Hour By Kate Chopin1268 Words à |à 6 Pagesupon how it would be if her husband was to actually pass away, how everything would be so much better and how much happier she would be without him. ââ¬Å"The stormâ⬠is a little different but not so much. The storm explains how theirs a sense of freedom that all of the character crave. Both of these stories have to do with change and freedom. In order to be happy you have to go through change and also be free from certain things and people. This is Kate Chopinââ¬â¢s view of finding happiness in an unsatisfiedRead MoreBrave New World by Aldous Huxley760 Words à |à 3 Pagesfew curious members of this society. He believes that there is much more to life than to be just another chess piece in a game where someone ââ¬Å"higher aboveâ⬠controls. ââ¬Ëââ¬Å"Donââ¬â¢t you want to be free and men?â⬠Rage was making him [John] fluent; the words came easily, in a rushâ⬠¦ ââ¬Å"Iââ¬â¢ll teach you; Iââ¬â¢ll make you be free whether you like it or not.â⬠And pushing open a window that looked on the inner court of the Hospital, he began to throw the little pill-boxes of soma tablets in handfuls out into the areaRead MoreThe Ethical Theory Of Utilitarianism1543 Wor ds à |à 7 Pagesreally matters except the happiness of creatures that can be happy. This is the distinction between acts that attempt to maximize the good (utility) and acts that seek to minimize harm. Rachels describes utilitarian theory as being based on social reform in human behavior of which offers an alternative to natural laws. Utilitarians emphasize the deep connection between doing the right thing and causing happiness to make creatures happy. Some believe to do the right thing, because itââ¬â¢s the right thing
Monday, December 16, 2019
Critical Analysis of the Liver functions and medical science Free Essays
Introduction The liver, with over 500 functions, is one the most significant and versatile organ of the human body. It weighs around 1.5kg and it is divided into four lobes; left, right, quadrate and caudate. We will write a custom essay sample on Critical Analysis of the Liver functions and medical science or any similar topic only for you Order Now It is wrapped in a fibrous capsule which is covered by the visceral peritoneum. 30% of the bloody supply of the heart reaches the liver at a region called the Hilus every minute, of which two thirds is through the portal vein and a third through the hepatic artery, it then leaves the liver through the hepatic vein. Blood pressure is low, usually at 10mm Hg or less. The cells of the liver are known as Hepatocytes. Hepatocytes serve many roles in the functions of the liver of which include: Metabolic regulation; it plays a key role in the metabolism of carbohydrates, fats and proteins, Haematological regulation; it is the primary organ that regulates the composition of blood, and Bile synthesis. [2] During carbohydrate metabolism, most of the glucose that is derived from the breakdown of carbohydrates is stored as glycogen in the liver cells (Glycogenesis) until it is needed, which is when the liver will convert the glycogen back into glucose to be used for respiration (Glycogenolysis). Examples of such situations are when there is a short supply of glucose in the body during the times between meals or when fasting. When the body is starved from carbohydrates, the liver can produce glucose by a process called Gluconeogenesis by converting amino acids from dietary and body proteins, lactate or glycerol into glucose. This prevents the individual from having hypoglycaemia (low blood glucose levels), so by this it can also be said that the liver has an integral part of maintaining blood glucose levels. The liver serves a major role in fat metabolism by producing the lipoproteins that are needed to transport fat, cholesterol and triglycerides in the blood throughout the body. Protein metabolism takes place in the liver as it goes through amino acid conversion, most of the amino acids are synthesised into proteins that are needed for the body, especially albumin which is the main plasma protein. Amino acid metabolism however produces a waste product, Urea, which is transported to the kidneys via blood and excreted through urine. Haematological regulation is the way in which the liver processes the blood by regulating the amount of chemicals it holds and breaking down the nutrients within it so it is easy to use. It also detoxifies toxic substances such as drugs or alcohol that come via blood and breaks it down before being released back into the blood into amounts that can be handled by the body. In addition to its metabolic functions, it is also responsible for the production of bile. Bile is a yellow alkaline fluid that is produced by the hepatocytes made up of mainly water (85%) and bile salts (10%). Bile salts acts as a fat emulsifier so it is needed for the normal digestion and absorption of ingested fats. Bile also serves as a route in which substances such as drugs and wastes produced from metabolism that arenââ¬â¢t removed by the kidneys, such as bilirubin, is removed from the body through the faeces. Hepatocytes secrete bile into tubes known as Bile Canaliculi, which jointo form Bile Ductules. Bile ductules then transport bile to the nearest portal area. The right and left hepatic ducts collects the bile from the ductules at the portal areas and merge to form the Common Hepatic Duct. This leaves the liver to go to the gall bladder through the Cystic Duct which joins onto the Common Bile Duct which transports bile to the duodenum through the Duodenal Ampulla and then goes into the small intestine ready to act upon the absorption of fats. [2] These are only a few functions of the liver, all of which if do not function properly can lead to many liver diseases. Diseases can generally be classified into two types; Hepatocellular, which results in damage to the hepatocytes and Cholestatic which restricts bile flow due to blockage in ducts. Most patients suffering from a liver disease develop jaundice resulting from high levels of the bilirubin in the blood stream (hyperbilirubinemia). Jaundice makes whites of the eyes yellow and then gradually the skin start becoming yellow. Bilirubin is produced from dead red blood cells; at the end of their life span, the haemoglobin found within them is released and split into haem and globin. Iron from haem is recycled for the production of more haemoglobin and any remains of the haem molecule are converted to bilirubin. It is excreted in the faeces and some in the urine. It is elevated in most liver diseases as they cause some sort of damage to hepatocytes which means bilirubin cannot conjugate with glucuronic acid in order to be excreted, so it stays in the bloodstream where its levels continuously increase. One of the common diseases to occur in the liver is Hepatitis. It results in inflammation of the liver cells. Viral Hepatitis can be caused by Hepatitis A, B, C, D, E, yellow fever or Herpes Simplex. Patients usually start off small with flu like symptoms. Non viral hepatitis can be due to auto immune reasons, drugs, toxins found in mushrooms and alcohol. [3] ââ¬ËAs alcohol consumption is very high in the western world, alcohol hepatitis is a common problem. Symptoms include enlargement of the liver, development of fluid in the abdomen (ascites), increased blood pressure in the portal vein and later development of jaundice. If alcoholic hepatitis is diagnosed it is important to stop consuming alcohol at once otherwise it could lead to more serious damage such as cirrhosis or even liver failure.ââ¬â¢ [2] Cirrhosis is an irreversible liver disease. Patients with cirrhosis develop ascites, jaundice and the formation of fibrous tissue where liver cells should be, the liver cells are destroyed in response to toxic chemicals, a viral hepatitis, or most commonly, high alcohol consumption. These are examples of Hepatocellular liver diseases. An example of a Cholestatic liver disease would be Cholestasis. Cholestasis is a state when there is a blockage in the bile ducts so bile cannot be released. Again, jaundice develops when a patient suffers from cholestasis as bilirubin is also unable to reach the small intestine to be excreted. Other symptoms include pale faeces and dark urine. There are a number of tests available that determines liver diseases. These include bilirubin, ALP, ALT and the GGT tests. A slightly abnormal bilirubin concentration indicates it may be haemolytic anaemia (abnormal rate of red blood cell destruction). A higher concentration is due to diseases which have damaged the hepatocytes therefore bilirubin cannot conjugate or be excreted properly. These diseases are acute hepatitis and alcoholic hepatitis. A very high concentration indicates cholestasis as it means bile flow is completely blocked (most commonly by gallstones) and so bilirubin cannot be excreted. Bilirubin can be measured by taking a blood test; conjugated, unconjugated or total bilirubin. Conjugated bilirubin is bound to glucuronic acid and so is called direct bilirubin. Unconjugated bilirubin is measured by subtracting the direct bilirubin from the total bilirubin, so is called indirect bilirubin. Total Bilirubin is the term used when both are measured. GGT, ALP and ALT are all enzymes that are present in the liver cells. Hepatocyte death (necrosis) leads to large amounts of these enzymes to be released into the blood stream which if measured will serve as an indicator of liver disease. These enzymes can be measured by taking around 5 ml of venous blood. Abnormal ALT (alanine transferase) results are found in diseases that have come about as a result of necrosis. In acute hepatitis, ALT rises before jaundice develops and then usually goes back to normal within 8 weeks. A continuous raised level of ALT means that it chronic liver disease such as chronic hepatitis or cirrhosis. High GGT (gamma glutamyl transferase) levels are found in all liver and biliary tract diseases. GGT doesnââ¬â¢t determine an actual disease but it is used to predict who may be at risk of liver disease due to alcohol as it is the only enzyme that is produced due to alcohol, so high continuous levels would mean alcoholic hepatitis or cirrhosis. Moderately results of ALP (alkaline phosphatise) indicate acute hepatitis but extremely high results show cholestasis may have developed. However, ALP is also present in the cells of the bone, so only measuring it by itself would not be an accurate indication of liver disease. It is usually measured alongside GGT; if both levels are high then it confirms that the problem is definitely within the liver. These are a few diseases and tests that are commonly used today to identify one of the biggest causes of death in the UK today. References: [1] Martini, F., H., 2004, Fundamentals of Anatomy and Physiology, 6th edition, San Francisco: Benjamin Cummings, ISBN: 0-13-120346-0. [2] Higgins, C., 2000, Understanding Laboratory Investigations, Oxford: Blackwell Science Ltd, ISBN: 0-632-04245-1 [3] Mayo Clinic Staff, 2010, Alcoholic Hepatitis, Mayo Clinic, DS00785 How to cite Critical Analysis of the Liver functions and medical science, Essay examples
Sunday, December 8, 2019
Hungry Ghost Month free essay sample
Nearly every culture across the globe celebrates a holiday that honors the deceased. The Mexican Dia de los Muertos, the Japanese Obon, and the Catholic All Saintââ¬â¢s Day are some of the better-known celebrations. One holiday that consistently passes under the radar is the Hungry Ghost Festival, a traditional festival commemorated by ethnically Chinese communities around the world such as China, Singapore, Malaysia, and Taiwan. According to Chinese tradition, the seventh month of the lunar calendar is recognized as the Ghost Month. The Hungry Ghost Festival falls on the fifteenth day of the Ghost Month and is known as Ghost Day, a day in which the gates of Hell are opened. Ghosts and spirits, including deceased ancestors, begin to emerge out of the lower realm and roam into the realm of the living. These spirits are continually in a state of unrest from their sufferings in the underworld. In order to alleviate their torments, both Buddhists and Taoists perform rituals to exonerate the suffering of the deceased through the Hungry Ghost Festival. We will write a custom essay sample on Hungry Ghost Month or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Activities during the festival may include food offerings, incense burning, joss paper (or ghost money) burning, releasing of paper lanterns into the sky or water, and praying for the spirits and ancestors. The Hungry Ghost Festival has roots in the Buddhist and Taoist culture, but many aspects of the rituals originate from Chinese folk religion and traditions. The Buddhist origins of the festival can be traced back to the legend of Mu-lien. ââ¬Å"Mu-lien Saves His Mother from Hell,â⬠is a story of a merchant who gives up his trade to become a devout Buddhist. Once Mu-lien achieved enlightenment, he reflected upon his father and mother. He used his clairvoyance to find his father in heaven, but found that his mother was in hell. She was reborn as a hungry ghost. His mother became greedy with the money he left her; she with held her money and kindness to Buddhist monks, so she was condemned to hell. After battling numerous demons with the help of Buddha, Mu-lien saves his mother. Buddhists named Ghost Day as a day of prayer and offering in which monks can pray and make sacrifices on behalf of hungry ghosts and departed ancestors. These spirits are then absolved and pacified. The story ends with the rescue of his mother from hell; she is saved and is reborn as a pet dog in a wealthy family.
Subscribe to:
Posts (Atom)