955 resultados para arguments by definition


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Grigorij Kreidlin (Russia). A Comparative Study of Two Semantic Systems: Body Russian and Russian Phraseology. Mr. Kreidlin teaches in the Department of Theoretical and Applied Linguistics of the State University of Humanities in Moscow and worked on this project from August 1996 to July 1998. The classical approach to non-verbal and verbal oral communication is based on a traditional separation of body and mind. Linguists studied words and phrasemes, the products of mind activities, while gestures, facial expressions, postures and other forms of body language were left to anthropologists, psychologists, physiologists, and indeed to anyone but linguists. Only recently have linguists begun to turn their attention to gestures and semiotic and cognitive paradigms are now appearing that raise the question of designing an integral model for the unified description of non-verbal and verbal communicative behaviour. This project attempted to elaborate lexical and semantic fragments of such a model, producing a co-ordinated semantic description of the main Russian gestures (including gestures proper, postures and facial expressions) and their natural language analogues. The concept of emblematic gestures and gestural phrasemes and of their semantic links permitted an appropriate description of the transformation of a body as a purely physical substance into a body as a carrier of essential attributes of Russian culture - the semiotic process called the culturalisation of the human body. Here the human body embodies a system of cultural values and displays them in a text within the area of phraseology and some other important language domains. The goal of this research was to develop a theory that would account for the fundamental peculiarities of the process. The model proposed is based on the unified lexicographic representation of verbal and non-verbal units in the Dictionary of Russian Gestures, which the Mr. Kreidlin had earlier complied in collaboration with a group of his students. The Dictionary was originally oriented only towards reflecting how the lexical competence of Russian body language is represented in the Russian mind. Now a special type of phraseological zone has been designed to reflect explicitly semantic relationships between the gestures in the entries and phrasemes and to provide the necessary information for a detailed description of these. All the definitions, rules of usage and the established correlations are written in a semantic meta-language. Several classes of Russian gestural phrasemes were identified, including those phrasemes and idioms with semantic definitions close to those of the corresponding gestures, those phraseological units that have lost touch with the related gestures (although etymologically they are derived from gestures that have gone out of use), and phrasemes and idioms which have semantic traces or reflexes inherited from the meaning of the related gestures. The basic assumptions and practical considerations underlying the work were as follows. (1) To compare meanings one has to be able to state them. To state the meaning of a gesture or a phraseological expression, one needs a formal semantic meta-language of propositional character that represents the cognitive and mental aspects of the codes. (2) The semantic contrastive analysis of any semiotic codes used in person-to-person communication also requires a single semantic meta-language, i.e. a formal semantic language of description,. This language must be as linguistically and culturally independent as possible and yet must be open to interpretation through any culture and code. Another possible method of conducting comparative verbal-non-verbal semantic research is to work with different semantic meta-languages and semantic nets and to learn how to combine them, translate from one to another, etc. in order to reach a common basis for the subsequent comparison of units. (3) The practical work in defining phraseological units and organising the phraseological zone in the Dictionary of Russian Gestures unexpectedly showed that semantic links between gestures and gestural phrasemes are reflected not only in common semantic elements and syntactic structure of semantic propositions, but also in general and partial cognitive operations that are made over semantic definitions. (4) In comparative semantic analysis one should take into account different values and roles of inner form and image components in the semantic representation of non-verbal and verbal units. (5) For the most part, gestural phrasemes are direct semantic derivatives of gestures. The cognitive and formal techniques can be regarded as typological features for the future functional-semantic classification of gestural phrasemes: two phrasemes whose meaning can be obtained by the same cognitive or purely syntactic operations (or types of operations) over the meanings of the corresponding gestures, belong by definition to one and the same class. The nature of many cognitive operations has not been studied well so far, but the first steps towards its comprehension and description have been taken. The research identified 25 logically possible classes of relationships between a gesture and a gestural phraseme. The calculation is based on theoretically possible formal (set-theory) correlations between signifiers and signified of the non-verbal and verbal units. However, in order to examine which of them are realised in practice a complete semantic and lexicographic description of all (not only central) everyday emblems and gestural phrasemes is required and this unfortunately does not yet exist. Mr. Kreidlin suggests that the results of the comparative analysis of verbal and non-verbal units could also be used in other research areas such as the lexicography of emotions.

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Astroblastoma is a historically traded microscopic diagnosis to denote a rare neuroepithelial tumor of uncertain nosology, involving a distinctive pattern of pseudorosette arrangement of neoplastic cells. While displaying some glial properties, the latter shall not - by definition - be either reducible to or part of any conventional glioma type. We report on clinicopathologic correlations in a case of astroblastoma involving an extensive rhabdoid phenotype of tumor cells. The male patient was operated on at the age of 53 and 59 years for a left parietal tumor measuring 5.8 cm in diameter at the first presentation. On magnetic resonance imaging and angiography, both the primary and its recurrence were discrete, highly vascularized, and contrast-enhancing. The second surgery was complemented with radiotherapy of 66 Gy, followed by chemotherapy with Temozolomide. Twelve years into clinical history, the patient has stable minimal residual disease at the age of 65. A review of pathology samples from both surgeries showed well-differentiated astroblastoma according to current standards, with an MIB-1 labeling index of 1% and 4%, respectively. Neither of the specimens involved cellular anaplasia, overt mitotic activity, microvascular proliferation, or palisading necrosis. Most tumor cells harbored paranuclear filamentous rhabdoid inclusions that were immunostained for vimentin and, in part, also for GFAP. No polyantigenic reactivity was observed. This example contributes another facet to the spectrum of the so-called composite rhabdoid tumors. Involving a low-grade parent neoplasm, it also further substantiates the incipient perception that the rhabdoid phenotype neither is a peculiar but nonspecific convergence point of anaplastic evolution, nor are such lesions indiscriminately bound for a relentless course.

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Siglecs are cell-surface proteins found primarily on hematopoietic cells. By definition, they are members of the immunoglobulin gene super-family and bind sialic acid. Most contain cytoplasmic tyrosine motifs implicated in cell signaling. This review will first summarize characteristics common and unique to Siglecs, followed by a discussion of each human Siglec in numerical order, mentioning in turn its closest murine ortholog or paralog. Each section will describe its pattern of cellular expression, latest known immune functions, ligands, and signaling pathways, with the focus being predominantly on CD33-related Siglecs. Potential clinical and therapeutic implications of each Siglec will also be covered.

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The science of blood groups has made giant steps forward during the last decade. Blood-group typing of red blood cells (RBCs) is performed on more than 15 million samples per year in Europe, today much less often for forensic reasons than for clinical purposes such as transfusion and organ transplantation. Specific monoclonal antibodies are used with interpretation on the basis of RBC agglutination patterns, and mass genotyping may well be on its way to becoming a routine procedure. The discovery that most blood group systems, whose antigens are by definition found on RBCs, are also expressed in multiple other tissues has sparked the interest of transplantation medicine in immunohematology beyond the HLA system. The one and only "histo-blood group" (HBG) system that is routinely considered in transplantation medicine is ABO, because ABO antigen-incompatible donor/recipient constellations are preferably avoided. However, other HBG systems may also play a role, thus far underestimated. This paper is an up-to-date analysis of the importance of HBG systems in the alloimmunity of transplantation and autoimmune events, such as hemolytic anemia.

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In hormone refractory prostatic carcinoma (HRPCa), the majority of patients have bone metastases only, which are by definition non-measurable. This makes objective evaluation of chemotherapeutic agents difficult. Prostate specific antigen (PSA) as a dynamic model was analyzed as potential auxiliary end point in HRPCa.

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Modern e-learning systems represent a special type of web information systems. By definition, information systems are special computerized systems used to perform data operations by multiple users simultaneously. Each active user consumes an amount of hardware resources. A shortage of hardware resources can be caused by growing number of simultaneous users. Such situation can result in overall malfunctioning or slowed-down system. In order to avoid this problem, the underlying hardware system gets usually continuously upgraded. These upgrades, typically accompanied with various software updates, usually result in a temporarily increased amount of available resources. This work deals with the problem in a different way by proposing an implementation of a web e-learning system with a modified software architecture reducing resource usage of the server part to the bare minimum. In order to implement a full-scale e-learning system that could be used as a substitute to a conventional web e-learning system, a Rich Internet Application framework was used as basis. The technology allowed implementation of advanced interactivity features and provided an easy transfer of a substantial part of the application logic from server to clients. In combination with a special server application, the server part of the new system is able to run with a reasonable performance on a hardware with very limited computing resources.

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In the European Union, lending is an exclusive right for copyright and related rights, but Member States can transform public lending to a right of remuneration and even exempt some establishments from any payment. The making available of works online is not covered by the public lending right regime of the Rental and Lending Directive but is considered as an act of making available governed by the InfoSoc Directive. As a consequence, libraries are currently not allowed to digitally transmit works to their patrons as lending, but have entered into licenses with publishers to develop an offer of lending of e-books, also called e-lending, with the intermediation of dedicated platforms operated by commercial actors. Compared to physical lending, e-lending is not based on ownership of the book by libraries but on its provision by this intermediary. This paper discusses how the objective of enabling libraries to engage in e-lending should be achieved, and what is the proper dividing line between a market-based solution, as developing today, and a limitation to exclusive rights. The impact of an extension of the public lending right to e-lending should be assessed, but not based on a criterion of direct substitution of a book on loan at the library to a book bought at a retailer. By definition, libraries are substitutes to normal trade. Instead, the overall effect of lending to the commercialisation of books and other works should be verified. Particular conditions for a limitation in favour of lending are also addressed, and notably the modalities of lending (a limited duration, one simultaneous user per title, …), not to make e-lending through libraries easier and preferable to the normal acquisition of an e-book. This paper argues in favour of some and controlled extension of the public lending right to cover the lending of e-books and other digital content. For the role of libraries is essential in providing access to works and culture to readers who would or could not rely only on normal acquisition of books or other items on the market, to works that are not provided by the market, and to material for research. Libraries are a third sector providing access to works, aside the market and non-market exchanges between individuals. This role should not lose its relevance in the digital context, or it would culturally impoverish future generations of readers.

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Sexually transmitted infections (STIs) are, by definition, transmitted between sexual partners. For curable STIs an infected index case can potentially re-infect the same partner multiple times. Thus, R0, the average number of secondary infections one typical infected individual will produce during his or her infectious period is not necessarily the same as the average number of secondary cases (infected persons). Here we introduce the new concept of the case reproduction number (Rc). In addition, we define the partnership reproduction number (Rp) as the average number of secondary partnerships consisting of two infected individuals one typical infected individual will produce over his or her infectious lifetime. Rp takes into account clearance and re-infection within partnerships, which results in a prolongation of the duration of the infectious period. The two new reproduction numbers were derived for a deterministic pair model with serial monogamous partnerships using infection parameters for Chlamydia trachomatis, an example of a curable STI. We showed that re-infection within partnerships means that curable STIs can be sustained endemically even when the average number of secondary cases a person produces during his or her infectious period is below one.

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Sudden cardiac death (SCD) is by definition unexpected and cardiac in nature. The investigation is almost invariably performed by a forensic pathologist. Under these circumstances the role of the forensic pathologist is twofold: (1.) to determine rapidly and efficiently the cause and manner of death and (2.) to initiate a multidisciplinary process in order to prevent further deaths in existing family members. If the death is determined to be due to "natural" causes the district attorney in charge often refuses further examinations. However, additional examinations, i.e. extensive histopathological investigations and/or molecular genetic analyses, are necessary in many cases to clarify the cause of death. The Swiss Society of Legal Medicine created a multidisciplinary working group together with clinical and molecular geneticists and cardiologists in the hope of harmonising the approach to investigate SCD. The aim of this paper is to close the gap between the Swiss recommendations for routine forensic post-mortem cardiac examination and clinical recommendations for genetic testing of inherited cardiac diseases; this is in order to optimise the diagnostic procedures and preventive measures for living family members. The key points of the recommendations are (1.) the forensic autopsy procedure for all SCD victims under 40 years of age, (2.) the collection and storage of adequate samples for genetic testing, (3.) communication with the families, and (4.) a multidisciplinary approach including cardiogenetic counselling.

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Overdiagnosis is the diagnosis of an abnormality that is not associated with a substantial health hazard and that patients have no benefit to be aware of. It is neither a misdiagnosis (diagnostic error), nor a false positive result (positive test in the absence of a real abnormality). It mainly results from screening, use of increasingly sensitive diagnostic tests, incidental findings on routine examinations, and widening diagnostic criteria to define a condition requiring an intervention. The blurring boundaries between risk and disease, physicians' fear of missing a diagnosis and patients' need for reassurance are further causes of overdiagnosis. Overdiagnosis often implies procedures to confirm or exclude the presence of the condition and is by definition associated with useless treatments and interventions, generating harm and costs without any benefit. Overdiagnosis also diverts healthcare professionals from caring about other health issues. Preventing overdiagnosis requires increasing awareness of healthcare professionals and patients about its occurrence, the avoidance of unnecessary and untargeted diagnostic tests, and the avoidance of screening without demonstrated benefits. Furthermore, accounting systematically for the harms and benefits of screening and diagnostic tests and determining risk factor thresholds based on the expected absolute risk reduction would also help prevent overdiagnosis.

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PURPOSE: Patients with chronic depression (CD) by definition respond less well to standard forms of psychotherapy and are more likely to be high utilizers of psychiatric resources. Therefore, the aim of this guidance paper is to provide a comprehensive overview of current psychotherapy for CD. The evidence of efficacy is critically reviewed and recommendations for clinical applications and research are given. METHODS: We performed a systematic literature search to identify studies on psychotherapy in CD, evaluated the retrieved documents and developed evidence tables and recommendations through a consensus process among experts and stakeholders. RESULTS: We developed 5 recommendations which may help providers to select psychotherapeutic treatment options for this patient group. The EPA considers both psychotherapy and pharmacotherapy to be effective in CD and recommends both approaches. The best effect is achieved by combined treatment with psychotherapy and pharmacotherapy, which should therefore be the treatment of choice. The EPA recommends psychotherapy with an interpersonal focus (e.g. the Cognitive Behavioural Analysis System of Psychotherapy [CBASP]) for the treatment of CD and a personalized approach based on the patient's preferences. DISCUSSION: The DSM-5 nomenclature of persistent depressive disorder (PDD), which includes CD subtypes, has been an important step towards a more differentiated treatment and understanding of these complex affective disorders. Apart from dysthymia, ICD-10 still does not provide a separate entity for a chronic course of depression. The differences between patients with acute episodic depression and those with CD need to be considered in the planning of treatment. Specific psychotherapeutic treatment options are recommended for patients with CD. CONCLUSION: Patients with chronic forms of depression should be offered tailored psychotherapeutic treatments that address their specific needs and deficits. Combination treatment with psychotherapy and pharmacotherapy is the first-line treatment recommended for CD. More research is needed to develop more effective treatments for CD, especially in the longer term, and to identify which patients benefit from which treatment algorithm.

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There is an ongoing mission in Afghanistan; a mission driven by external political forces. At its core this mission hopes to establish peace, to protect the populace, and to install democracy. Each of these goals has remained just that, a goal, for the past eight years as the American and international mission in Afghanistan has enjoyed varied levels of commitment. Currently, the stagnant progress in Afghanistan has led the international community to become increasingly concerned about the viability of a future Afghan state. Most of these questions take root in the question over whether or not an Afghan state can function without the auspices of international terrorism. Inevitably, the normative question of what exactly that government should be arises from this base concern. In formulating a response to this question, the consensus of western society has been to install representative democracy. This answer has been a recurring theme in the post Cold War era as states such as Bosnia and Somalia bear witness to the ill effects of external democratic imposition. I hypothesize that the current mold of externally driven state-building is unlikely to result in what western actors seek it to establish: representative democracy. By primarily examining the current situation in Afghanistan, I claim that external installation of representative democracy is modally flawed in that its process mandates choice. Representative democracy by definition constitutes a government reflective of its people, or electorate. Thus, freedom of choice is necessary for a functional representative democracy. From this, one can deduce that because an essential function of democracy is choice, its implementation lies with the presence of choice. State-building is an imposition that eliminates that necessary ingredient. The two stand as polar opposites that cannot effectively collaborate. Security, governing capacity, and development have all been targeted as measurements of success in Afghanistan. The three factors are generally seen as mutually constitutive; so improved security is seen as improving governing capacity. Thus, the recent resurgence of the Taliban in Afghanistan and a deteriorating security environment moving forward has demonstrated the inability of the Afghan government to govern. The primary reason for the Afghan government’s deficiencies is its lack of legitimacy among its constituency. Even the use of the term ‘constituency’ must be qualified because the Afghan government has often oscillated between serving the people within its territorial borders and the international community. The existence of the Afghan state is so dependent on foreign aid and intervention that it has lost policy-making and enforcing power. This is evident by the inability of Afghanistan to engage in basic sovereign state activities as maintaining a national budget, conducting elections, providing for its own national security, and deterring criminality. The Afghan state is nothing more than a shell of a government, and indicative of the failings that external state-building has with establishing democracy.

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DNA Barcoding (Hebert et al. 2003) has the potential to revolutionize the process of identifying and cataloguing biodiversity; however, significant controversy surrounds some of the proposed applications. In the seven years since DNA barcoding was introduced, the Web of Science records more than 600 studies that have weighed the pros and cons of this procedure. Unfortunately, the scientific community has been unable to come to any consensus on what threshold to use to differentiate species or even whether the barcoding region provides enough information to serve as an accurate species identification tool. The purpose of my thesis is to analyze mitochondrial DNA (mtDNA) barcoding’s potential to identify known species and provide a well-resolved phylogeny for the New Zealand cicada genus Kikihia. In order to do this, I created a phylogenetic tree for species in the genus Kikihia based solely on the barcoding region and compared it to a phylogeny previously created by Marshall et al. (2008) that benefits from information from other mtDNA and nuclear genes as well as species-specific song data. I determined how well the barcoding region delimits species that have been recognized based on morphology and song. In addition, I looked at the effect of sampling on the success of barcoding studies. I analyzed subsets of a larger, more densely sampled dataset for the Kikihia Muta Group to determine which aspects of my sampling strategy led to the most accurate identifications. Since DNA barcoding would by definition have problems in diagnosing hybrid individuals, I studied two species (K. “murihikua” and K. angusta) that are known to hybridize. Individuals that were not obvious hybrids (determined by morphology) were selected for the case study. Phylogenetic analysis of the barcoding region revealed insights into the reasons these two species could not be successfully differentiated using barcoding alone.

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The entrepreneurial theory of the firm argues that entrepreneurship, properly understood, is a crucial but neglected element in explaining the nature and boundaries of the firm. By contrast, the theory of the entrepreneurial firm presumably seeks not to understand the nature and boundaries of "the firm" in general but rather to understand a particular type of firm: one that is entrepreneurial. This paper is an attempt to reconcile the two. After briefly delving for the concept of entrepreneurship in the work of Schumpeter, Kirzner, and (especially) Knight, the paper makes the case for the entrepreneurial theory of the firm. In such a theory, the firm exists as the solution to a coordination problem in a world of change and uncertainty, including Knightian or structural uncertainty. Taking a historical or developmental perspective, the paper then examines the changing nature of the entrepreneurial coordination problem over the life-cycle. In this formulation, "the entrepreneurial firm" is a nascent firm or proto-firm facing a problem of coordinating systemic change in economic capabilities. Lacking (by definition) adequate guidance from existing systems of rules of conduct embedded in markets or organizations, the entrepreneurial firm typically relies on a form of organization Max Weber called charismatic authority. In the end, although there is no such thing as a non-entrepreneurial firm, firms that must solve coordination problems in a world of novelty and systemic change ("entrepreneurial firms") are perhaps the purest case of the entrepreneurial theory of the firm.

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Polybrominated diphenyl ethers (PBDEs) are brominated flame retardants (BFRs) that have been widely produced and used as flame retardants since the 1970’s in many consumer products such as carpet and drape linings, plastics used in electronics, computer and television casings and polyurethane foam used in chairs, sofas and mattresses. PBDEs are persistent organic pollutants (POPs), which, by definition, are toxic in nature, persistent in the environment and accumulative in living organisms. Animal studies have found PBDEs to cause health defects such as fetal malformations, delayed onset of puberty, decreased sperm count, behavioral changes, permanent learning and memory impairment, endocrine disruption, as well as cancer at high doses. Recent research involving humans reported that elevated breast milk PBDEs levels in their mothers are associated with cryptorchidism (absence of one or both testes from the scrotum) in newborn boys and adverse birth outcomes as well as elevated serum PBDE levels in mothers are associated with low sperm count in young men. There are three commonly manufactured PBDE commercial mixtures: Penta-, Octa-, and Deca-BDEs. Two of them (Octa- and Penta-BDEs) have been banned by the European Union and are being voluntarily phased out in the United States. However, Deca continues to be manufactured, used, and imported in the United States. This MPH thesis consists of a literature review of peer reviewed scientific articles concerned with PBDEs in the environment and in humans, as well as a discussion concerning different routes of exposure to PBDEs and their blood, milk and tissue levels as surrogates for body burdens in North Americans and in people from other countries. Results of this literature review shows PBDE levels in human blood, milk and tissues are higher in North Americans than people from other countries worldwide. To date, the highest level of PBDEs was found in a toddler’s blood in a California study. Despite the fact that PBDEs are associated with adverse health effects, and highest levels of PBDEs in North Americans, Deca-BDE is still manufactured, used and imported in the United States. There is an urgent need of new federal regulatory policy to ban completely the production, importation and use of all commercial mixtures of PBDEs.^