Mechanical engineering Research Paper Example | Topics and Well Written Essays - 500 words

Mechanical engineering - Research Paper Example Here are a few observations. The easiest sources where from bls.gov and usnews.com. They have simple and well documented report on what is required for one to orient to mechanical engineering. They gave accurate information about what’s required once a person takes up the course, what to expect in terms of the difficulties of the job as well as the salary. Salary ranges where given from almost all the sources. From (Bls.gov, 2014), mechanical engineers’ median annual salary was $ 80,580.this was back in May 2012. It was during this year that, the engineers in the low 10% region earned less than $52,030 annually and those in the top 10% earned nothing less than $121,530. The site gives the salary ranges of the top five industries. The highest employers were Computer and electronic product manufacturers who paid them $84,860 annually, followed by Architectural engineering, Transport and equipment manufacturers, Machinery manufactures and the lowest employers were in the Fabrication industry that paid them $69,890 annually. Other sources had almost similar figures but I prefer this one (Bls.gov, 2014) A bachelor’s degree in mechanical engineering or mechanical technology is required. This is a fixed requirement on most universities. However some colleges offer 5year programs that cover both Bachelors degree as well as Masters. (Money.usnews.com, 2014). The full program takes 4-5 years to complete inclusive of the internships. Apart from the educational requirements, one is required to have other qualities. One has to have the creativity in them. One should have great listening skills. Math’s also a key quality as most of the time, you will come across several work stations.one should have mechanical skills in them. Lastly is they should be good problem solvers as they will encounter challenges that will require them to work on it in no time at all. (Bls.gov, 2014) . There is other kind of information that is given in some

Marketing Management - marketing plan Essay Example | Topics and Well Written Essays - 2500 words

Marketing Management - marketing plan - Essay Example Prior to the study conclusion and business recommendation, the forecasted sales on behalf of Apple and Vodafone will be discussed. Apple’s iPhone is considered as one of the fastest-selling telecommunications product as part of the history. (news.com.au, 2007) In line with the different countries with the legal right to sell iPhone, Apple had chosen a single phone network to exclusively provide the service for the iPhone handset. During the first quarter of 2008, Apple made a confirmation that iPhone will be released in Australian market within the year. (Lake, 2008) Recently, Vodafone has announced that the company will be selling Apple’s iPhone to customers all over Australia during the last quarter of the year with the condition that customers will be required to use the Vodafone network. (Vodafone, 2008a & 2008b) However, Vodafone did not specify whether the said agreement that was signed between the company and Apple was exclusive or not. (Moses, 2008) In case the contract between Vodafone and Apple was not exclusive, there is a possibility for Telstra and Optus to have the priviledge of selling the iPhone to Australian market. As part of Apple’s main business objective, signing a contract with a single phone network in each of its target country will enable Apple to sell a large quantity of iPhone within the shortest period of time. For this study, the researcher will develop a marketing plan for Apple iPhone in Australia. In the process of conducting the study, the researcher will first describe the product followed by studing the market segmentation for iPhone. Based on the demographic profile of its target consumers, the researcher will define the potential market size for the said product. Using the PESTLE framework, the researcher will examing and analyze the external factors that may affect the

Life Span Development and Personality Essay Example for Free

Life Span Development and Personality Essay Today the topic of discussion will focus on the famous Sigmund Freud and his viewpoints on developmental psychology. This discussion seeks to answer four questions about Sigmund Freud’s life. The first topic is Sigmund Fraud’s influences and environment in psychological development. Second the discussion seeks to reveal Sigmund Freud’s view of family issues or support systems that influenced Freud’s developmental growth and adjustment. Third the discussion seeks to explain two different theories of personality. The discussion seeks to explain how each theory differs in terms of the explanation of Freud’s unique pattern and traits. The fourth and final topic of discussion seeks to explain the theatrical approach that explains both Freud’s behaviors and achievements. The reason this paper chose to write about famous Sigmund Freud explained. Sigmund Freud was born in 1856 and died in 1940. Freud studied the personality of humans. Freud describes three major systems of the human personality. Sigmund Freud’s structural model is as follows: 1. the id holds the human sexual and aggression energy driven by impulses and characterized by a human’s primary thinking (Kowalski Westen, 2011). 2. The superego explains a human’s conscience and a major source of ideas established through a person’s identity (Kowalski Westen, 2011). 3. The ego describes a person’s desires, morality, and desires (Kowalski Westen, 2011). Sigmund Freud’s psychosexual development suggest in the first five years the human personality begins. Zero to one is the oral stage of development. Children f rom zero to one gain the most gratification from sucking than from biting and chewing food and sometimes other objects. In stage one through three describes the anal stage. During the anal stage children seem to gain gratification from defecation through the anus. The conflict begins when children begin potty training. Some children hold back feces causing him or her to become constipated. Generalized by some children’s behavior and the way he or she does, for example, cleanliness, stinginess, or stubbornness. On the other hand some children may have accidents in his or her pants. This may relate to expulsive personality, for example, disorderly conduct, messiness, and throwing fits. The final stage of three to five referred to as the phallic stage (Maitland, 2011). In this stage the genital area becomes a sense of pleasure. This causes the superego to begin and guards against incest and aggression. Children also can feel a sense of inferiority in this stage. Freud suggests mental disorders may come from an individual’s history and not just an individual’s physical impairments. Freud developed a new way to analyze human behavior. Freud’s view explained mental energy comes from the body. Freud believed all humans can only obtain a limited amount of mental energy. Freud believed human behavior was from causation. Freud also believed tension-reduction consist of a human goal for behavior. Freud claims humans consist of two human impulses for example, sexual impulses, and libido. Sexual impulses consist of life affirming impulses. Libido consists of energy source impulses. Needs consist of basic life impulse, aggression consists of death encouraging impulses, and aggressive impulses consist of an energy source for aggressive impulses. When a human impulse grows the more likelihood the human will react on impulses to reduce the need he or she feels to do so. Life affirming libido consists of activities, people objects, or goals. Cathexis consists of the process of investing libidinal energy. When an individual uses excessive cathexis this may lead to neurosis, however, neurosis is treatable. Treatment for neurosis often referred to catharsis or in other words a talking therapy. Sigmund Freud believed mental processes were unconscious. Sigmund Freud believed the conscious contains an individual’s specific information that a person’s paying attention at any given time. Freud believed the preconscious contains information or clues most individuals do not pay attention to unless recalled by a specific situation. Sigmund Freud believed the unconscious contains an individual’s desires, feelings, and thoughts held without an individual’s knowledge. However, these desires, feelings, and thoughts affect an individual’s everyday life. Freud believed the information in an individual’s unconscious emerges by ac cident, such as joke telling, dreams, symptoms of illness, and the associations between individual’s ideas. Sometimes the anger in a person’s unconscious comes out by mistake Understanding Psychology (nd). Another theory of Sigmund Freud contains the three components of personality, for example, id, superego and ego. Freud claimed the three components appear always in conflict with each other, according Freud the conflicts usually appear sexual or aggressive and most violate the societal rules. From a personal standpoint Sigmund Freud’s psychoanalyst theory the way an individual’s personality develops during ages zero to five. However, from a personal standpoint an individual’s personality develops throughout his or her life. For example children’s development goes through the age of 18. Some children take longer to develop than others. Even in adulthood an individual’s experiences and environment may change a person’s personality. Many individual live and are raised in bad environment’s that would affect his or her personality. On the other hand many people are also raised in a good environment that also affects his or her personality i n a positive and occasionally negative manner. In both scenarios an individual’s actions and behavior may affect his or her personalities throughout life. This paper was chosen on Sigmund Freud because he was a very intriguing and an expert in psychological research. In conclusion, this paper revealed the famous research in psychological research by Sigmund Freud. The paper revealed the three components of personality, according to Sigmund Freud. The three components of personality according to Sigmund Freud are id, superego, and ego. Sigmund Freud suggests that most human behavior develops during the age of zero to five. This paper revealed the Sigmund Freud’s view human personality and the unconscious mind of a human. Freud also suggests that many disorders may come from an individual’s history and not just an individual’s physical impairments. Freud suggests most disorders deal with sexual disorders or an individual’s aggressive behavior. Freud also suggests humans act on his or her impulses. Some people may act on bad impulses that may lead to terrible outcomes and consequences for his or her actions. Sigmund Freud was greatly scrutinized for his psychological research. Sigmund Freud was chosen for this paper because his research was very intriguing research in human personality and human behavior. Reference: Kowalski, R., and Westen, D. (2011). Psychology (6th ed.).Hoboken, NJ: Wiley Retrieved from University of Phoenix eBook Col Maitland, L., L. (2011). Personality Theories and Approaches for AP Psychology Retrieved from http://www. education.com Understanding Psychology (nd). Chapter 14 Theories of Personality Retrieved from http://www.glencoe.com

A Review On Alcoholic Detection From EEG Signals

A Review On Alcoholic Detection From EEG Signals Abstract: This review covers advances of the past decade, in the development of EEG signal processing algorithms for alcoholic detection. In recent years, various computational approaches have been proposed to detect alcoholism from EEG recordings. In this paper, we review some of those approaches, and discuss their limitations and potential In part I, an introduction to the effect of alcohol on EEG is discussed briefly. We review some of the known effects of alcohol on EEG signal in part II. Some of the exiting state of the art signal processing techniques for alcoholic detection in EEG recordings are discussed in part III. A review of various signal processing methods used to classify alcoholics and controls is done. The potential and limitation of such computational approaches are discussed in part IV. A discussion on the potential use of EEG as a biomarker for alcoholism and as a mass screening tool is also discussed .At the end of the paper, we conclude by briefly addressing the future challenges and open problems in part V. PART I Introduction Alcoholism is a social bane that is affecting the human life in all aspects. Not only it causes damage to the human brain and other organs of the body in various ways, it also brings about a lot of difficulties and discomfort to an alcoholic person in his/her social life. A lot of research has gone into finding the ill effects and the extent to which it damages the human body. Some of the harmful effects include lack of coordination between body and mind, loss of vision, imbalance in walking, incoherent speech, memory slips, depression to name a few. These effects can be observed after only a few drinks and they may vanish once the person gives up drinking. However a person who is addicted to drinking large quantities of alcohol for a long time may be affected with these effects that persist for a longer time and severely damage one or more organs of the body. The way in which alcohol affects the brain and the probable reversal of the ill effects caused by heavy drinking on the brain still remain as hot topics in alcohol research [1]. Some of the factors that determine the extent to which alcohol affects the brain are: i) quantity and how frequently a person drinks ii) the age of the subject at which the habit of drinking started and how long it is being continued iii) subjects age, education, gender, genetic predisposition and family history of alcoholism iv) possibility of prenatal exposure and the overall health condition[47]. Heavy drinking not only affects the human brain but it also damages other vital organs of the body. It is also found that females are more affected than males in the way the alcohol consumption damages the various organs of the body. For example, a few years of heavy drinking in women cause cirrhosis [48] cardiomyopathy [49] and nerve damage [50] than in alcoholic men. However, the studies on sensitivity of females brain to alcohol-induced brain damage as compared with males, have not shown any conclusive results [1]. Alcohol intake combined with poor general health condition or with severe liver disease causes damage to the human brain in an indirect manner. For example, thiamine deficiency is common in people with alcoholism which is a result of poor overall nutrition [1].  A large percentage of alcoholics suffer from thiamine deficiency and some may even develop severe brain disorders such as [51] Wernicke-Korsakoff syndrome (WKS) [52]. The symptoms of WKS include mental confusi on, oculomotor disturbances and difficulty with muscle coordination, forgetfulness and frustration and have difficulty with walking and coordination [53] . One of the organs that severely gets affected by long term alcohol consumption in large quantities is the liver. In a person with a history of heavy long-term drinking, the liver s function is to breakdown alcohol into harmless by-products and flush them out of the body. However, the liver may get damaged due to excessive alcohol intake, leading to liver cirrhosis. This condition of the liver can harm the brain, leading to a potentially fatal brain disorder called hepatic encephalopathy [54].Some of the effects of Hepatic encephalopathy are disturbances in sleep patterns, mood swings, personality changes, anxiety, depression, attention deficits, difficulty in coordination like shaking of the hands ( asterixis). In the worst case, patients may slip into coma ( hepatic coma), which can lead to death. It is indeed difficult to diagnose these effects as related to hepatic encephalopathy. New imaging techniques assist researchers to study specific regions of brain in such patients, which helps them in knowing exactly how hepatic encephalopathy progresses. The studies have confirmed that at least two toxic substances, ammonia and manganese are responsible for the development of hepatic encephalopathy. The severely damaged liver cells allow these harmful toxic products to enter the brain, which in turn harms the brain cells. Alcohol consumption during pregnancy may lead to physical, learning, and behavioural problems in the developing fetal brain. The most serious of these problems is the fetal alcohol syndrome (FAS). Children with FAS may have distinct facial features [1]. FAS infants growth may be lesser than average. They may suffer from microcephaly. In infants with this syndrome, only a fewer neurons may be present or a fewer neurons may function properly. This will lead to problems in learning and behaviour for a long term. All alcoholics do not experience the ill effects of alcohol consumption in a similar manner to the same extent. The source of the disease may be different for different patients. This makes it difficult to pinpoint any one parameter as responsible for the brain disorders found in alcoholics. That is why, one of the active areas of research is to study why some patients are vulnerable to brain deficits while others are not [55]. Most alcoholics suffering from cognitive disorder improve in the structure and functioning of the brain within a year of abstinence [56-58].This may not be true in all cases. Therefore clinicians must devise different types of treatment methods to cater to different patients. They use brain-imaging techniques to determine the course and progress of treatment over a period of time. Researchers use imaging methods such as magnetic resonance imaging (MRI), diffusion tensor imaging (DTI), positron emission tomography (PET), and electrophysiological brain mapping. These methods provide precise and accurate information on structural, functional and biochemical changes in patients brain over time. Sometimes, two or more brain imaging methods are used together to correlate the results and monitor when a chronic alcoholic patient stops drinking and again after long periods of sobriety ,the possibility of relapse of the drinking habit in the patient [59]. The process of memorization and retrieval depend on factors such as attention and motivation [60]. MRI of brain assist the physicians to study the effects of long time abstinence from alcohol on memory and attention, as well as changes that take place when drinking habit relapses. The aim of these studies is to differentiate between the alcohol-induced permanent effects on the brain and those which are reversible with abstinence. PET imaging assists researchers to visualize, in the living brain, the damages associated with heavy alcohol consumption [61]. This also enables scientists to analyse alcohols effects on neurotransmitter systems, brain cell metabolism and blood flow within the brain. These studies on alcoholics have shown the frontal lobe disorders, which are responsible for various functions associated with learning and memory and deficits in cerebellum which controls movement and coordination. PET can also be used for monitoring the effects of alcoholism treatment on the a ffected parts of the brain and may give new directions in developing medications to rectify the chemical deficits found in the brains of people with alcohol dependence. Numerous studies have shown the ill effects of alcohol on the human brain by observing and analysing the electroencephalogram (EEG) of the alcoholic subject and compared with that of a control subject. Electroencephalography (EEG) is a simple non invasive tool that records the brains electrical signals by placing electrodes on the scalp. These signals show real-time activity as it occurs in the brain. Many studies have shown that the effect of alcohol on the human brain can be perceived by processing the recording the EEG of an alcoholic subject. The single channel EEG recordings of a control and an alcoholic subject are as shown in fig 1.It can be observed that the time series EEG data of both control and alcoholic subjects are not clearly perceptible to the bare human eye. However, with the help of certain signal processing techniques either in the time domain or frequency domain or time-frequency domain or spatial domain techniques, the latent features can be extracted to identify the effects of alcohol on the human brain. As an illustration, the PSDs of the EEG of both control and alcoholic subject are as shown in fig2. From this it is very clear that the power contained in various frequency components are different for both control and alcoholic subjects. C:UsersMUDocumentsMATLABeeg_epilep_codestime_series_data.jpg C:UsersMUDocumentsMATLABeeg_epilep_codespsd_c_a.jpg Fig 1.Time series EEG data of control Fig2. PSD plot of EEG of control and alcoholic subjects and alcoholic subjects Many alcoholic men have low amplitude of their P3 components (fig 3). P3 amplitudes in alcoholic women reduce to a lesser extent than in men. The uniqueness of the reduction in P3 component among other symptoms is that even after the patient drops the habit of drinking alcohol, this reduction in P3 persists[63].Therefore this parameter can be thought of as a biomarker for alcohol dependence rather than an effect of alcohol consumption. There are many studies conducted on the reduced P3 amplitudes of young people who are not exposed to alcohol but their fathers being alcoholics [64, 65].Therefore, P3 can be used as biomarkers to help recognizing people who may be at greatest risk for developing problems with alcohol. graph Fig 3 . P3 amplitude in control and alcoholic subjects (Courtesy:[1]) Compared to other imaging methods discussed above, electrophysiological methods such as EEG processing for detection of alcoholics has a lot to offer in terms of mobility and cost involved. Hence it can be used as a mass screening tool for the underprivileged with a history of alcoholism. PART II Effect of Alcohol on EEG recordings Studies have shown that some of the major effects of alcohol on EEG are: i) enlargement of frontal negative occipital wave component ii) increase in ventricular and sulcal CSF volumes iii) Reduction in p300 component iv)Reduction in pre frontal cortical excitability v)Reduction in the amplitude of Error related negativity vi) Binge drinking effect on ÃŽ ´ and fast ÃŽ ²waves vii) Reduction in the power of EEG signal in frontal region and enhancement of ÃŽ ¸ waves . viii) high ÃŽ ² and ÃŽ ¸ power in the resting EEG, abnormalities in eye movements, in saccadic inhibition during antisaccade tasks. These effects, however, are not always easily detectable. There tends to be a large variability from patient to patient. As a result, none of these phenomena allow at present to reliably detect the effect of alcohol at an early stage. Many recent studies have concentrated on how to improve the sensitivity of EEG for detecting alcoholism. In the following we briefly review some of these studies. A. Enlargement of frontal negative occipittal wave component Way back in 1990, Jerald Varner et al., reported a study of alcoholic organic syndrome patients using the occipital wave components of the event related potential (ERP) as an electrophysiological parameter [3]. The study was conducted on normal, Korsakoff, and alcoholic dementia patients. The frontal negative occipital wave was observed to be increased in alcoholic organic brain syndrome patients and it was concluded that it was probably due to an attention deficit, indicating a probable frontal lobe dysfunction. B. Increase in ventricular and sulcal CSF volumes Adolf Pfefferbaum et al., [4] quantified brain cerebrospinal fluid (CSF) volumes derived from computed tomography (CT) in alcoholics and controls. The results showed that the ventricular and sulcal CSF volumes in alcoholic patients were greater than was expected for their age. This also proved the previous results obtained from a similar study using CT and MRI showing greater vulnerability of the aging brain to alcohol. The absolute ventricular volumes were similar in MRI and CT, while MRI results showed larger sulcal volume estimates than the CT. It was concluded that MRI slice thickness and its resolution to partial volume effects led to this increase in sulcal volume estimate. C. Reduction in p300 component Shirley Y. Hill et al., studied the effect of alcohol on the p300 component [9] .According to this study , it was found that only patients(female) with comorbid depression had a reduced p300 amplitude ,while there was no difference in other alcoholic and control subjects(male and female) . From this study, it was also concluded that the P300 amplitude reduction seen in children prone to developing alcoholism seems to represent a delay in neuron development that normalizes as they grow into adulthood. In another similar study, Michio Hada et al., used bootstrap analysis method in which P3a current source density (CSD) maps showed distinct topographic mapping between alcoholics and control subjects in all the brain regions [10]. More sources and sinks were seen in the alcoholics than in the control subjects for P3a. The reduced P3a amplitude and sinks in alcoholics coupled with less specificity in their CSD maps, suggested disorganized less efficient functioning of the brain. This suggests a probable underlying CNS hyper excitability in alcoholics due to cortical disinhibition . D. Reduction in pre frontal cortical excitability Seppo Kahkonen et al. [13], reported the effects of alcohol on the prefrontal cortex in nine healthy subjects using transcranial magnetic stimulation (TMS) activated electroencephalogram (EEG) signals. Changes in EEG activity lasting up to 270 ms post stimulus were observed as a response to activation by TMS. The changes were observed more prominently at anterior electrodes suggesting the reduction in excitability in the prefrontal cortex due to alcohol. E. Reduction in the amplitude of Error related negativity A study by Clay B Holroyd et al., indicated that alcohol consumption reduces the amplitude of the error-related negativity (ERN)[14] component of the event related potential(ERP), a sharp negative going signal that occurs in the EEG at the instant when an incorrect motor response starts ( ie.,error commission). F. Binge drinking effect on ÃŽ ´ and fast ÃŽ ² waves Kelley E Courtney et al. evaluated the spectral power in the ÃŽ ´ and fast ÃŽ ² waves of EEG recordings of young undergraduate university students who varied in their binge drinking history [18].The aim of the study was to characterize the effects of binge drinking on central nervous system(CNS) neuroelectric activity in male and female undergraduate subjects. The EEG recordings of these subjects showed enhanced spectral power in the ÃŽ ´ (0-4 Hz) and fast- ÃŽ ² (20-35 Hz) bands for the high-binge drinkers. Although the dependence of fast- ÃŽ ² power on binge drinking still remains unclear, the change in fast- ÃŽ ² power indicates that EEG spectral pattern of high-binge drinkers is similar to that of alcoholics. This study indicated that the relative enhancement in fast- ÃŽ ² power may be used as a biomarker for potential future alcoholism even in the absence of familial alcoholism. G.Effect on ÃŽ ²,ÃŽ ¸ ,ÃŽ ³ waves ,eye movement disorders and saccadic inhibition Wu Di et al., discussed the change in the power of EEG signal in various parts of the brain after consuming alcohol , resulting in harmful effects on different parts of the brain and the body[19]. It was observed that while in the frontal region the power of the EEG signal decreased with the increase in the quantity of alcohol intake, the power of the EEG signal in central, occipital region increased. This study also revealed that while in the frontal region, the alcohol intake caused a transformation in the fast wave with decrease in the power of EEG signal, the fast wave reduced with an increase in the power of EEG signal in the central and occipital region. It was also observed that while the effect of alcohol in the frontal region indicated nerve stimulation of alcohol in this part, making drinkers to become excited after alcohol intake, in the central and occipital region, the effect of alcohol consumption led to an inhibitory action on the neuron cells, resulting in the weakeni ng of the body coordination and eyesight. Further it was noted that increase in alcohol intake resulted in ÃŽ ¸ waves generation and gradual enhancement as the subjects were in state of drowsiness and the central nervous system(CNS) of the subjects was inhibited. At the same time, ÃŽ ± and ÃŽ ² waves were seen to gradually enhance and the region of these waves expanded after consuming alcohol. The study also indicated that the correlation between parts of brain decreased gradually because the clustering of the EEG signal was separated gradually into small clusters with increased alcohol intake. From this observation, it was concluded that too much drinking may lead to the decrease of balance, stability between the parts of the brain. S. Campanella et al., [41], studied various physiological parameters such as continuous EEG, oculomotor measures, cognitive ERPs and event-related oscillations that are affected in chronic alcoholic patients compared to healthy controls. This study was aimed at identifying links between these physiological parameters, altered cognitive processes and specific clinical symptoms. The result of their study showed:(1) high beta and theta power in the resting EEG, suggesting hyperarousal of CNS (2) abnormalities in smooth pursuit eye movements, in saccadic inhibition during antisaccade tasks, and in prepulse inhibition, suggesting disturbed attention and abnormal prefrontal inhibitory cortical dysfunction; (3) decreased amplitude for cognitive ERPs situated along the continuum of information processing, suggesting that alcoholism is associated with neurophysiological deficits at the level of the sensory cortex and not only disturbances involving associative cortices and limbic structures; and (4) decreased theta, gamma and delta oscillations, suggesting cognitive disinhibition at a functional level. Ajayan Padmanabhapillai et al.,[71] investigated the early evoked gamma band response in male adolescents at high risk and at low risk groups for a visual stimulus. The results indicate that the deficient early evoked gamma band response may indicate the risk of development of alcoholism and could be a potential bio marker for future addiction to alcoholism. David A. Kareken et al., [72] used functional magnetic resonance imaging (fMRI) to determine how family history affects the brains response to subjects preferred alcoholic drink odours (AO) as compared to appetitive control odours (ApCO). This study suggested that a family history of alcoholism and brain exposure to alcohol odour in heavy drinkers differentially affect the way in which brain responds to alcohol cues. H.Whole-genome association study on EEG waves Variation in resting EEG is associated with common, complex psychiatric diseases such as alcoholism, schizophrenia and anxiety disorders although it can not be used as a diagnostic tool for any of them. Such traits appear to be dependent on the underlying molecular processes than on clinical symptoms, and points to an alternative method for the identification of genetic variation that characterize complex psychiatric disorders. Colin A. Hodgkinsona et al.,[39], performed a whole-genome association study on alpha (ÃŽ ±), beta (ÃŽ ²), and theta (ÃŽ ¸) EEG power in a Native American cohort of 322 individuals to maintain the genetic and environmental homogeneity of this population. Three genes SGIP1, ST6GALNAC3 and UGDH were nominally associated to variability of ÃŽ ¸ or ÃŽ ± power. SGIP1 was estimated to account for 8.8 % of variance in ÃŽ ¸ power and this association was replicated in US Caucasians, where it accounted for 3.5% of the variance. Bayesian analysis of prior probability of association based upon earlier linkage to chromosome 1 and enrichment for vesicle-related transport proteins established the genuineness of the association of SGIP1 with ÃŽ ¸ power. It was also found that the association of SGIP1 with alcoholism provides validation of the use of EEG as an endo phenotype for alcoholism. I.Effect of alcohol on facilitation effect The aim of this study by P. Maurage et al., [32], was to study cross modal (auditory-visual) processing while the subjects were given an emotional stimuli and specifically the auditory-visual facilitation effect. Twenty patients suffering from alcoholism, and 20 healthy controls were asked to identify the emotion (anger or happiness) displayed by auditory, visual or auditory-visual stimuli. The stimuli were designed to elicit a facilitation effect (namely, faster reaction times (RTs) for crossmodal condition than for unimodal ones).It was observed that the alcoholics showed less significant facilitation effect compared to their healthy counterparts.This lack of facilitation effect may be used as a biomarker for an impaired auditory-visual processing in alcoholics. PART III I. Signal processing techniques for detection of alcoholism in EEG signal The Electroencephalogram (EEG) is a bio signal containing information about the state of the brain. The latent information present in the EEG signal may not be visible for the human expert and any subtle variations hence cannot be observed and monitored as and when it occurs. Especially in the time series EEG data, subtle variations can not be perceived by human eye. In such a situation the computational approach becomes very important to extract any such micro variations in the EEG recording, containing significant information about the status of any pathology present. Also, since EEG is an inexpensive method and due to its portability, it can be used as a powerful mass screening tool. EEG signals are the signatures of neural activities. They are captured by multiple-electrode either invasively or non-invasively, over the cortex under the skull, or certain locations over the scalp, and can be recorded in different formats. The signals are normally presented in the time domain, but by applying simple signal processing tools such as the Fourier transform to perform frequency analysis and some imaging tools to visualize EEG topographies , the brain activities can be visualized in frequency or spatial domains respectively. Various time domain, frequency domain, time-frequency methods, statistical signal processing technique such as Wavelet transform [5], Recurrent Neural network [6], nonlinear systems [7], logistic regression [8], spectral densities of DWT coefficients [16], etc., and chaotic signal processing techniques [2] are used to study the pathology of brain such as epilepsy. These techniques are also used to classify between alcoholic, non-alcoholic and epilept ic subjects. In recent years, several research groups have started investigating the potential of electroencephalograms (EEGs) for detecting alcoholism and study the short term and long term effects on the brain. There have been many algorithms developed so far for processing EEG signals. Some of the operations include time-domain analysis, frequency-domain analysis, spatial-domain analysis, and multiway processing. Also, several algorithms have been developed to visualize the brain activity from images reconstructed from only the EEGs. Separation of the desired sources from the multisensor EEGs has been another research area. This can later lead to the detection of brain abnormalities such as epilepsy and the sources related to various physical and mental activities. In this section, some of the signal processing techniques applied to EEG signal for the detection of alcoholism is reviewed. A. Extraction of spectral band power and parametric methods Ong, Kok Mang et al, have shown that VEP (visually evoked potential) could be influenced by long term alcohol abuse [20]. The power spectral density of the recorded VEP was estimated using Burg algorithm (parametric analysis) and the extracted Gamma band power was used as features to train the neural network to classify the alcoholics and non-alcoholics. The authors claim that classification result of 97.50% accuracy has been achieved, to discriminate alcoholics from non-alcoholics.Kok-Meng Ong et al., have proposed Principal Component Analysis (PCA) method for the optimization of the selection of a subset of channels for single trial Visual Evoked Potentials (VEP) signals [23]. The proposed method was successful in optimizing a subset of channels that guaruntees high classification accuracy of alcoholics and non-alcoholics Another similar study by Ramaswamy Palaniappan et al., show that the difference of VEP signals between alcoholics and non-alcoholics can be observed using two spectral power ratios in gamma band (37-50 Hz) extracted from seven channels. This result implies that gamma band spectral power could be used as a biomarker on the lasting effects of long-term use of alcohol on visual response though the studied alcoholics have been abstinent for a minimum period of 1 month. Here Genetic algorithm (GA) is used to optimize the selection of subset of the feature set and classification is done with Fuzzy ARTMAP (FA) classifier [11], using VEP signals. The seven spectral bands of VEP signals are extracted using infinite impulse response (IIR) band-pass filters with constant gain and uniform bandwidth. Spectral power in these bands is calculated using Parsevals theorem and used as features to train the FA and ML-BP classifiers. The proposed technique discriminates alcoholics from non-alcoholics wit h high accuracy. In continuation of the previous work, Ramaswamy Palaniappan et al., in their work have derived second order autoregressive (AR) coefficients [21] to discriminate alcoholics using single trial gamma band Visual Evoked Potential (VEP) signals using 3 different classifiers: Simplified Fuzzy ARTMAP (SFA) neural network (NN), Multilayer-perceptron-back propagation (MLP-BP) NN and Linear Discriminant (LD) function . Here elliptic filtering was used in the gamma band spectral range on single trial VEP signals. The average classification errors of 2.6%, 2.8% and 11.9% were obtained from LD, MLP-BP and SFA classifiers. The high accuracy of LD classification results show the effectiveness of the proposed method to discriminate between alcoholic subjects and controls. Several improvements were proposed to previous work of automated classification of alcoholics and non-alcoholics [24] by the same author. In the previous paper, MLP-NN classifying energy of gamma band VEP signals gave the best cla ssification performance using 800 VEP signals from 10 alcoholics and 10 non-alcoholics. Here, the dataset was extended to include 3560 VEP signals from 102 subjects: 62 alcoholics and 40 non-alcoholic. The classification performance was improved by i) increasing the gamma band spectral range ii) Multiple Signal Classification algorithm was used to obtain the power of the dominant frequency in gamma band VEP signals for feature extraction iii) the use of the k nearest neighbour classifier. The performance was validated by a 10-fold cross validation classification. Modification resulted in an improvement in the classification percentage from 94.49% to 98.71% in maximum averaged CVC accuracy. In this paper by Ramaswamy Palaniappan [30], a method is proposed to discriminate chronic alcoholic from non-alcoholic subjects while the subjects were sober. Energies of EEG signals in multiple gamma bands were used as features while the subjects were asked to do a picture recognition task .A neural network was used for classifying chronic alcoholic subjects from controls. Leave one out cross validation strategy revealed that alcoholics could be discriminated from non-alcoholics with accuracy of 94.55%. This study shows that the energy in gamma band spectral energy can be used as a biomarker for screening of alcoholics. The classification of chronic alcoholics from non-alcoholics using the EEG is studied in this paper by A Shahina et al., [27].Weighted Linear Prediction Cepstral Coefficients were extracted from the VEP and used as discriminating feature vectors. Auto associative neural network was used to classify these vectors into alcoholics and non alcoholics. A recognition accuracy of 52.5% is achieved. This shows that all the 64 channels do not have the same discriminatory attributes causing a reduction in the accuracy levels. Hence the authors conclude that in order to improve the classification performance, there is a need for the optimization of the number of channels to be considered for classification. In this study by Tugce Balli et al., [31], they investigated the electrophysiological differences between alcoholic and control subjects using two different approaches namely complexity and energy analysis. The EEG data used in this study were recorded from 77 alcoholic and 44 control subjects while the subjects were performing delayed matching to sample object recognition task for three types of stimuli. The experimental paradigm evokes object recognition, visual short-term memory and decision making abilities. The results indicated that all regions (i.e. frontal, central, temporal, parietal and occipital) in the brain exhibit more complexity and less energy for alcoholic subjects as compared to controls. When different visual stimuli pairs were compared among alcoholic and control subjects, the results from energy analysis showed group wise differences in occipital and parietal regions. These results provide a strong indication on the impairment in brains electrophysiological activ ity for alcoholic subjects due to a history of long term alcohol abuse. Chronic alcoholism is classically associated with major deficits in the visual and auditory processing of emotions. However, the cross modal (auditory-visual) processing of emotional stimuli, which occurs most frequently in everyday life, has not yet been explored.

Literature review construction project costs

Literature review construction project costs This chapter comprises of literature review, quotes of the various related works done in this area of studies. The duration of construction projects right from inception to completion is assuming great importance in the construction industry. The author of this project work believes that, this shift in attention on constructioin delays is taking it rightful place of importance in the global construction sector. Clients or consumers are no longer content merely with minimal cost and adequate functional performance for their projects; increasing interest rates, inflation and other commercial pressures, among other factors, mean that it is in many instances most cost-effective to complete a project within the shortest possible time.The the current hursh financial climate does not allow for subcontractors not to be prudent with project planning and delivery , hence the reason for chosing to write on this subject. The most significant unbudgeted costs on many construction projects are the financial impacts associated with delay and disruption to the works. Owners and Subcontrcators have one common objective; to complete the project in time and within budget. It is the failure of this objective of time which leads to failure of budget and ultimately gives rise to disputes. There is no consensus in the literature on the identification of factors which affect stipulated, planned or achieved construction times of buildings. One reason for this is that researchers have largely viewed the subject from diverse prospective. Such viewpoints include identification of discrete factors which affect productivity on site and taking a systems view of the construction process and end product (Nkado R.N, 1995) The inherent and often unanticipated risks on construction projects present key challenges to subcontracting firms. For example, if a project is delayed or disrupted, significant resources are engaged and management time consumed. The outcome can have serious consequences on corporate value. One loss-making project can wipe out the profit on 50 successful ones and significantly damage a companys reputation. In the current economic climate, claims and disputes are increasingly more likely. Construction delays are not a modern phenomena.The delays on some of the UKs most famous landmarks, such as St Pauls Cathederal, the Houses of Parliament and the Clifton Suspension Bridge would make the delays on more recent high profile construction projects look distinctly trifling (Lowsley et al, 2006) Delay Ñ-ц¢ generally acknowledged à Ã‚ °Ãƒâ€˜Ã¢â‚¬ ¢ thà Ã‚ µ mà Ã‚ ¾Ãƒâ€˜Ã¢â‚¬ ¢t common, costly, complex à Ã‚ °nd riц¢ky problem encountered Ñ-n construction projectц¢. Becauц¢e à Ã‚ ¾f thà Ã‚ µ overriding ц¢ignificance à Ã‚ ¾f tÑ-me fà Ã‚ ¾r both thà Ã‚ µ proprietor (Ñ-n termц¢ à Ã‚ ¾f performance) à Ã‚ °nd thà Ã‚ µ ц¢upplier (Ñ-n termц¢ à Ã‚ ¾f money), it Ñ-ц¢ thà Ã‚ µ ц¢ource à Ã‚ ¾f frequent diц¢puteц¢ à Ã‚ °nd claimц¢ leading tà Ã‚ ¾ lawц¢uitц¢. Delayц¢ occur Ñ-n almost every construction project à Ã‚ °nd thà Ã‚ µ magnitude à Ã‚ ¾f theц¢e delayц¢ varieц¢ conц¢iderably frà Ã‚ ¾m project tà Ã‚ ¾ project. à Ã¢â‚¬ ¦ome projectц¢ à Ã‚ °re only à Ã‚ ° few dayц¢ behind ц¢chedule; ц¢ome à Ã‚ °re delayed bу over à Ã‚ ° year. à Ã¢â‚¬ ¦o it Ñ-ц¢ eц¢Ãƒâ€˜Ã¢â‚¬ ¢ential tà Ã‚ ¾ define thà Ã‚ µ actual cauц¢eц¢ à Ã‚ ¾f delay Ñ-n order tà Ã‚ ¾ minimize à Ã‚ °nd avoid delay Ñ-n any construction project (Ahmed et al., 2003). Chan et al (2004) Concluded in a research conducted to measure the success of construction projects that, cost, time and quality are the three basic and most important performance indicators in consruction projects.Other measures such as safety, functionality and satisfaction etc. are also currently attracting increasing attention. Chan et al, (2004) accentuated that accurate construction planning is a key factor in ensuring the delivery of a project on schedule and within budget. As almost all projects comprise a large number of interdependent items of work and involve many participants, reliable plans and accurate progress-recording mechanisms become essential to project success. Mbachu, et al(2005) discover the sources of strategies for minimising risks in the construction projects and categorised the results into internal and external sources.The internal sources of risks, which fall under the control of clients ,consultants and Subcontractors , include those risk elements emanationg from their acts or omissions in the project development process. They noted that, the most frequently mentioned risk elements under client sources include frequent and late changes at critical stages of the design and construction process, poor leadership and inadequate supervisions on the part of Contractors and subcontractors, low productivity, re-work and lossess, delays in supplying equipment, materials and components. For the consultants, incomplete design information and delay in supplying information required by contractors on site.The external risk sources, which are not within the control of the client and the project team, could be segregated into economic and globalisation dynamics, unforeseen circumstances/force majeue, government, statutory, political controls, health and safety risk elements and socio-cultural issue.smia12010-07-21T16:29:00 Who says this is so? If it5s you then you nned to say what leads you to this concluswionyou Typeц¢ of delay A delay to a construction project generally means delay to the planned completion date or a delay to a particular activity or sequence of activities (Lowsley et al, 2006) Delays can be grouped in the following four broad categories according to how they operate contractually: non-excusable delays; excusable non-compensable delays; excusable compensable delays; and concurrent delayц¢ The Bureau of Engineering Project Delivery Manual version 2 released in October 2006 smia12010-07-21T16:30:00 You need to give a proper reference for this. Who are the Bureau of Engineering Project Delivery?categorised construction delays in three basic types of delays, namely; Excusable-Non-Compensatory (Concurrent), Non-Excusable and Excusable-Compensatory. Non Excusable Delay Non-Excusable delays are events that are within the Subcontractors control or that are foreseeable. These delays might be the results of late performance of Subcontractors, untimely performance by suppliers, faulty workmanship by the subcontractor, underestimate of productivity, inadequate scheduling or mamanagement, equipment breakdowns, staffing problems, a project specific labour strikes caused by either the Subcontractors with the labour representative or by unfair labour practices(Trauner et al,2009) Excusable Non Compensable Delay An excusable delay is caused by factors that are not foreseeable, beyond the Subcontractors control .The implication of the term means that, neither party is at fault under the terms and conditions of the contract and has agreed to share the risk and consequences when excusable events occur. The Subcontractor will not receive compensation for the cost of delay, but he will be entitled for an additional time to smia12010-07-21T16:31:00 Always? Dosent this depend on the terms of his sub-contract? complete his work and is also relieved from any contractually imposed liquidated damages for the period of delay (Ahmed et al, 2003) 2.5 Excusable Compensable Delay (Ahmed et al, 2003) acknowledged that, compensable delays are those that are generally caused by the owner or its agents. If the delay is compensable, then the contractor is entitled not only to an extension of time but also to an adjustment for any increase in costs caused by the delay. Owner-issued contracts specifically address some potential compensable delays and provide equitable adjustments. The usual equitable adjustable clauses in owner issued contracts that apply are: Changes, Dithering Site Conditionsmia12010-07-21T16:32:00 What does this mean?, and Suspension 2.6 Concurrent delays The concept of concurrent delay has become a very common presentation as part of some analysis of construction delays. The concurrency argument is not just from the standpoint of determining the projects critical delays but from the standpoint of assigning responsibility for damages associated with delays to the critical path. Owners will often cite concurrent delays by the contractor as a reason for issuing a time extension without additional compensation.Contractors will often cite concurrent delays by the owners as a reason why liquilidated damages should not be assessed for its delays. Concurrent delays are separate delays to the critical path that occur at the same time. (Lowsley et al, 2006) Rubin et al. (1983) defined concurrent delays as the situation in which two or more delays occur at the same time either of which had it occurred alone, would have affected the ultimate completion date. It means each of the delays must independently affect the critical path. Reynolds et al (2001) argue that to be considered concurrent delays, the delays need not commence precisely at the same time. Arditi et al (1995) had a view that, the delays need not occur in the same activity on the same critical path but may exist in different activities on parallel critical path as well. The SCL Protocol (SCL, 2002) describe a true concurrent delay as the occurrences of the delays, one an employer risk event and the other a contractor risk event, at the same time, and their effects felt at the same time. This occurrence is, however, extremely rare in practice since time is infinitely divisible. For instance, two delay events occurring on the same day would not necessarily be true concurrent delays because one may have occurred in the morning while the other in the afternoon. Concurrent delay is also rather misleadingly used to refer to the occurrence of two or more delay events at different times but their effect are felt (in whole or in part) at the same time. As a summary, Figure 1 classifies the different types of delays based on their various attributes. Figure 1: Delay Classifications (Nuhu Braimah 2008) 2.7 Primary Causes of Delay There are two kinds of reason for delay in construction project: external causes; and internal cauц¢eц¢.Internal causes of delay include the causes arising from four partià Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ involved in the project. These partià Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ include the proprietor, designers, contractorц¢, and conц¢ultantц¢. Other delays, which do not arise from these four partià Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢, are based on external factors for example from the government, material suppliers, or the weather (Ahmed et al., 2003). Semple et al. (1994) found that making provisions in a construction programme for events such as weather delays reduces disputes. Cost and time claims, especially those which are difficult to quantify, regularly result in disputes between the contractual parties. Weather contingencies are very seldom adequate, in terms of progress and cost, due to the use of varied methods used in the industry for weather contingency calculations. This results in adverse client-contractor relationships. Caenell.N.J, C2005) Cited the appropriateness to look at the matters which actually cause delay during the works themselves. The Contractor/Subcontractors responsibly for delays arise due to a failure on the part of the contractor to carry out the planning stages of the works properly, others will be due to an inability to perform in the manner agreed in the contract.This is in line with the authors believes that, most delays are caused by inefficiencies on the part of the Subcontractors. Employers responsibility or neutral events are caused through an act or omission of the employer or his team or by a matter which does not arise through the fault of the contractor. These are governed by the contract conditions. A useful list according to Carnell N.J (2005) is listed in Clause 25.4 of JCT 98 and includes: Force majeure,Exceptionally adverse weather conditions,Clause 22 perils(flood and the like),Civil commotion, strike or lock out,Compliance with architects instructions,Non-receipt of essential information,Delays by nominated suppliers or sub-contractors, artisans and tradesmen,Government action,Restrictions on the availability of labour or materials,Delays by,statutory undertakers,Delays in giving access to the works Ahmed et al, (2003) also mentioned the following as some possible causes of delays in construction project in nowadays: Possessive decision-making mechanism, highly bureaucratic organization, insufficient data collection and survey before design Site topography is changed after design,Lack of coordination at design phase,Inadequate review,Improper inspection approach,Different attitude between the consultant and contractors/subcontractors,Financial difficulties,Inexperience personnel,Insufficient number of staffs,Deficiency in project coordination,time spent to find sub contractors,company who is appropriate for each task,Often changing Sub -contracting company,Inadequate and old equipment,Lack of high-technology equipment and Harvest time. Ahmed et al (2003) cited Ogunlana et all (2001) as having studied the delays in Thailand, as an example of developing economies.They concluded that the problems of the construction industry in developing economies could be nested in three layers:(1) Problem of shortages or inadequacies on industry infrastructure, mainly supply of resources, (2) Problems caused by clients and consultants and (3) Problems caused by incompetence of Contractors. Assaf et al (1995) Listed 56 extensive causes of disputes over delay and identified them as : shortage of construction material, changes in types and specifications during construction, slow delivery of material, damage of material in storage, delay in the special manufacture of the building material, shortage of labour, labour skills, nationality of labourers, equipment failure, equipment shortage, unskilled operators, slow delivery of equipment, equipment productivity, financing by Contractor during construction, delays in Contractors progress payment by Owner, cash problems during construction, design changes by Owner or his agent during construction, design errors made by designers, foundation conditions smia12010-07-21T16:35:00 These would be far better rpesented as a bullet pointed listencountered in the field, mistake in soil investigation, water table conditions on site, geological problems on site, obtaining permits from municipality, obtaining permits for labourers, excessive bureaucracy in project Owner operation, building code used in the design of the project, preparation and approval of shop drawings, waiting for sample material approval, preparation of scheduling networks and revisions, lack of training personnel and management support, lack of database in estimating activity duration and resources, judgement of experience in estimating time and resources, project delivery systems used, hot weather effect on construction activities, insufficient available utilities on site, the relationship between different subcontractors schedule, the conflict between the consultant and the Contractor, uncooperative Owners, slowness of the Owner decision making process, the joint ownership of the project, poor o rganization, insufficient communication between Owner and designer at the design phase, unavailability of professional construction management, inadequate early planning of the project, inspection and testing procedures used in the projects, errors committed during field, application of quality control based on foreign specification, controlling subcontractors by general Contractors in the execution of the works, the unavailability of financial incentives for Contractor to finish ahead of schedule, negotiations and obtaining of contracts, legal disputes between various parties, social and cultural factors, accidents during construction . Ahmed et al. (2003) maintained that the iц¢Ãƒâ€˜Ã¢â‚¬ ¢ue of responsibility for delay Ñ-ц¢ related to whether the supplier Ñ-ц¢ awarded or Ñ-ц¢ liable for costs and additional time to complete the project. The categories of reц¢ponц¢ibilitieц¢ are: proprietor (or agent) responsible supplier will be granted à Ã‚ ° time extension and additional costs (indirect), where warranted; supplier (or subcontractor) responsible supplier will not be granted time or costs and may have to pay damages/penalties; neither party (e.g. act of God) responsible supplier will receive additional time to complete the project but no costs will be granted and no damages/penalties aц¢Ãƒâ€˜Ã¢â‚¬ ¢eц¢Ãƒâ€˜Ã¢â‚¬ ¢ed; and both partià Ã‚ µÃƒâ€˜Ã¢â‚¬ ¢ responsible supplier will receive additional time to complete the project but no costs will be granted and any damages/penalties aц¢Ãƒâ€˜Ã¢â‚¬ ¢eц¢Ãƒâ€˜Ã¢â‚¬ ¢ed. smia12010-07-21T16:36:00 Always? Dosent this depend on the risk allocation in the contract? Ying et al (2005) acknowledged five factors that influence time performance as; Long project scope identification, low speed of decision making, inadequate managerial skills during the planning phase, insuffiecient contractor completion and Lack of a strong organasational culture. Okumbe et al (2008) researched on Construction Industry perpestive on causes and effects of delays in South Africa and highlighted causes of dealy in payment as consultants inefficiency,lack of professionalism by the government employees,incompetence caused by insufficient staff,bureaucratic procedures experienced by government/client,late processing by project quantity surveyors ,late prepartion of payment certificate,claiming problems,late approval of work by architect and engineers,continous formulation of new policies by The Public Procurement and Asset Disposal Board (PPADB),poor budgeting by the client,late submission of cost reports by projects quantity surveyors,lack of understanding of contractual obligations and lack of funding,late project delivery,delays, in materials supply,labour stoppage as employess may go on strike if not paid on time,cash flow problems faced by contractors,contractors claiming extension of time with costs,risk of poor workmanship,poor contract deli very and default in paying suppliesrs and employers. In addition to causes of delays and who is responsible for them, there are other delay-related effects that may occur. High on the list is a decrease in the Contractors efficiency caused by the delays. The delays may directly cause the inefficiency or be caused by the inefficiency. Gorse (2004) Suggested that a well-evidenced claim, supported by an appropraite documentation, that properly establishes cause and effect and reasonably quantities the losses for each event will probably succeeds. Frimpong et al (2003)Conducted a survey on the causes of delay and cost overruns in construction of groundwater projects in a developing countries;Ghana as a case study and the main conclusions of the survey were;monthly payments difficulties from agencies,matarial procurement,poor technical performance,escalation of matarial prices accordinging to their degree of influence and theses were considered as major factors.The other factors that emerged as not very important ,but of interest were,bad weather,unfavorable geological conditions. Ahmed et al (2003) carried out a research which revealed the ranking of design related key delays.The most general design related caused delay was found to be taking place during the inspection phase followed by material/fabrication period, poor subcontract performance, material procurement and construction mistake as shown on figure 2. Source: Ahmed et al. ;( 2003) Figure 2: Ranking of design related key delays Effects of Delay on Construction Cost A brief review of text books and reports smia12010-07-21T16:38:00 What books and reports? You should at least give some example referencesreveal that construction excellence has not only become an option but a necessity, if the UK construction industry is to survive economics dynamics and changing social needs. Considering the industry is one of the pillars of the domestic economy making approximately 10 percent of Gross Domestic Product (GDP) and employing considerable number of workers, it is important to note that construction excellence is critical for the UK economy and its future. When a project is delayed, the owner, Contractor, or both may incur added costs. The determination of the amount of these costs is based on the results from the delay analysis and the determination of liability once the critical delays have been identified. (Trauner et al, 2009) More importantly, the construction industry needs to improve itself in order to increase profitability, quality of deliverables and client needs before it can contribute to the economy. There are many possible factors that can cause actual labour costs to exceed estimated costs such as engineering errors and omissions, excessive changes, delay and acceleration and weather. These factors may require contractors to work out of sequence, hire more manpower than planned, work scheduled overtime and utilize more costly methods of construction. (Borcherding et al, 2006). Trauner et al (2009) listed the following as examples of how delays can lead to inefficiencies. Shifts in construction sections-A delay to a project can shift work originally scheduled for one season into a different season. Availability of resources-Delays can affect the availability or resources in the areas of manpower, subcontracts or equipment. Manpower levels and distribution-Changes may be needed in terms of additions manpower, erratic staffing or variations in preferred/optimum gang size. Lowe et al (2006) described disputes as being the source of possible time and cost overrun and possible adversarial relationships between the different parties. This is not welcome to either the Owner or the Contractor. Cost overrun might lead to the project being unsuccessful, unfeasible or invalidate any benefits. Although avoiding disputes has been suggested, this is not usually possible and where disputes cannot be avoided efforts should be made to manage and contain the consequences. It is to the benefit of both the Employer and the Subcontractor to manage disputes towards a resolution as this will safeguard the success of the project. Cormican (1985) observed that the construction industry in UK is always at the top of the bankruptcy league and the most dangerous of all sectors. These unhealthy developments underpin the prevailing abandonment of projects and undermine the viability and sustainability of the construction industry. Akinci et al (1998) categorised risk factors affecting cost performance into organisation specific, global and acts of God. The organisation specific risks are internal risks related to the organisations resources and management including labour skills and availability, material delivery and quality, equipment reliability and availability, and managerial efficiency. Global risks are those that transcend the boundaries of the contracting organisation yet having large impact on it. These include estimating related, design related, level of competition, fraudulent practices, construction related, economic related and political relatedsmia12010-07-21T16:40:00 This is OK as far as it goes, but the literature revierw is supposed to be a CRITICAL review yours is really just a list of someone said thisà ¢Ã¢â€š ¬Ã‚ ¦. You really need to summariuse at the end what the key issues are from your literature review, and how they relate to your particular problem..

Nursing Mentorship Program Essay -- Nursing Practice, Nursing Profess

As Finkelman (2006) stated, â€Å"Mentoring, and important career development to that can be used by nurses any type of set or specialty, can be used to develop the critical leadership skills needed by nurses. All successful leaders have had mentors are our mentors† (Finkelman,2006, p. 390). Currently my facility has a six to months mentoring program for new graduates. This program is in addition to the current preceptor program that orients the new graduates to the unit they will be assigned. Most of these new nurses are graduates from local nursing schools and have done most of their clinical nursing education at this facility. The hospital realizes that going from a classroom and clinical setting to on hands bedside patient care can be a rude awakening. The registered nurses, selected to be mentors are the more experience, knowledgeable and will support and nurture the new grad. These Mentors are the individuals that tell the new nurse what she needs to know and will show her ways to accomplish her goals successfully and expose them to opportunities to learn new things. The nur...

Dramatica Theory and James Washington Square :: James Washington Square

Dramatica Theory and James' Washington Square In this essay I will review a critique of James' Washington Square. I found the critique to be dry and rather clinical in its approach to this fine work by Henry James. From the beginning the article presents a cold psychological approach to the characters that James' has made live for me in the short novel. The article covers the character's name, gender, a short description of him or her, the role that character plays in the piece and then goes on to list the basic characteristics of him or her. Motivation, methodology, evaluation and purpose are the four characteristics that are used to describe a character. The analysis does refer to the original work in many places. I found this to be helpful. For example when it describes Catherine Sloper it takes a quote from the novel to list her as, "a dull, plain girl she was called by rigorous critics" (James 11). This did help redeem the article somewhat. But the basic problem I found with the analysis kept leaping up. It's too scientific an approach for any literary work. The main problem with "Dramatica," for me, seems to be in that the theory looks at a story in relation to, "the mind's problem solving process" ("What is Dramatica?"). This area of the website goes on to explain that an author must examine all possible solutions to an issue in the story. In an effort to prove that the author's solutions are the best. The Dramatica theory of critique states that if, "you have covered every angle in your argument, you've mapped all the ways an audience might look at the problem and, therefore, all the ways anyone might look at that problem" ("What is Dramatica?"). This mapping turns any piece into a psychological pseudo study and relieves it of any beauty that it may contain.