308,329 research outputs found
L’indagine di Customer Satisfaction camerale: un caso di studio per una differente prospettiva di analisi
No full textThe Customer Satisfaction Survey for a Chamber of Commerce: a case study for a different perspective of analysis
Objectives
The present paper aims at analysing the Customer Satisfaction Survey
(CSS) dataset of an Italian Chamber of Commerce. This dataset has been collected in years 2006-2007 and previously analysed considering the SERVQUAL method. The idea here is to consider an alternative approach allowing for ordinal qualitative variables.
Methods and Results
The adopted method is a politomic generalization of Rasch model: the Partial Credit Model. The paper focuses on results regarding a single office, but all other analyses confirm these results: the complete analysis
shows that the supplied questionnaire are generally valid identifying some minor issues only.
Conclusions
The paper concludes with some suggestions to improve the quality of the CSS as the reduction of Likert scale levels, the introduction of “extreme” items (allowing for better measures identification), and, last but not least, the necessity of adoption of a better sample selection method
MARTON, Scarlett. Nietzsche e as mulheres: figuras, imagens e tipos femininos.
No full textResenha de Jelson Roberto de Oliveira do livro: MARTON, Scarlett. Nietzsche e as mulheres: figuras, imagens e tipos femininos
Cretaceous paleomagnetic results from Murge (Apulia, southern Italy): tectonic implications
No full textCretaceous paleomagnetic results from Murge (Apulia, southern Italy): tectonic implications
No full textCretaceous paleomagnetic results from Murge (Apulia, southern Italy): tectonic implications
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
On a conjecture of Marton
No full textWe prove a conjecture of K. Marton, widely known as the polynomial
Freiman--Ruzsa conjecture, in characteristic . The argument extends to odd
characteristic, with details to follow in a subsequent paper.Comment: 33 pages, updated version now to be submitted for publicatio
Malignant progression in pleomorphic xanthoastrocytoma: personal experience and review of the literature.
No full textPleomorphic xanthoastrocytoma (PXA) is a rare primary low-grade astrocytic tumor, recently classified as a neuroglial tumor. It generally occurs in children and young adults and shows benign behaviour (WHO II), although an anaplastic variant and malignant potential have been described. Pleomorphic xanthoastrocytomas with malignant transformation have been reported in three out of eight patients operated on for this type of tumor in our department in the last 15 years. The three patients were two adult women and a child, the primary tumors were located in the cortex of the right temporal lobe, and treatment consisted of complete surgical resection. Histological examination revealed simple PXA in two patients and a PXA with anaplastic foci in the other. Mean recurrence time was 5.7 years, with the original xanthoastrocytoma evolving to glioblastoma in two cases and anaplastic astrocytoma in the third. All three patients underwent a second operation, followed by adjuvant therapies. Two died from tumor progression and one from brain edema after intracerebral haemorrhage. A review of the available PXA literature dating back to 1979 revealed 16 cases of primary anaplastic astrocytoma and 21 cases of PXA with malignant transformation. Our experience adds three more cases of malignant transformations, outlining once again the potential malignancy of pleomorphic xanthoastrocytomas and the fact that prognosis in these cases is the same as for primary anaplastic astrocytoma and glioblastoma. Analysis of glioneuronal markers, Ki67 and p53 in all pleomorphic xanthoastrocytomas did not prove to be a discriminating factor to identify a subgroup of xanthoastrocytomas prone to malignancy. Accordingly, these tumors demand close long-term clinical and radiological follow-up
Dumbbell-shaped C-2 psammomatous melanotic malignant schwannoma. Case report and review of the literature.
No full textThe authors present the case of a dumbbell-shaped malignant psammomatous melanotic schwannoma of the upper cervical spine involving the C-2 sensory root. The family of the patient had a history of other malignant stromal tumors, without the Carney complex genetic pattern. The 30-year-old female patient complained of experiencing cervical pain and cervical muscle contractions for 6 months, and was admitted to the hospital. The cervical T1-weighted magnetic resonance (MR) images revealed the presence of a slightly hyperintense C2-3 intra-extradural lesion, moderately enhancing, which had eroded and enlarged the intervertebral foramen. The patient workup also included computed tomography scans and angiography. A posterior approach was used to perform a C2-3 hemilaminectomy, including opening of the dura mater and gross-total removal of the lesion. Histopathological examination of the lesion revealed it to be a malignant psammomatous melanotic schwannoma. The cerebrospinal MR image of the patient obtained at the 12-month follow-up examination demonstrated the presence of tumor progression into the subarachnoid space at the C-3 level. The strong malignancy potential of the lesion must be considered in the future management of the patient, especially due to the presence in the family of other stromal tumors such as gastrointestinal-stromal tumors and malignant melanomas. The authors review all the literature concerning melanotic schwannomas and report 105 cases of melanotic schwannoma that were not related to the Carney complex. The particular focus of their review is on the characteristics of the malignant progression of melanotic schwannoma, such as local recurrences, metastasis, and survival rate
Marton, north Lincolnshire: a Romano-British settlement in its context
No full textThis thesis seeks to reconstruct and interpret the form and extent of the Romano- British settlement at Marton, North Lincolnshire. The site at Marton has previously been the subject of no formal programme of archaeological research. However it offers a rich potential for applying non-intrusive archaeological survey, and this study is based on the results obtained from a combination of different survey techniques. Although the site has received very little formal archaeological attention in the past, uncontrolled metal-detection has been intensive over recent years. The unrecorded leaching of material, coupled with the diverse range of artefacts known to have been retrieved in detection has been one of the principal catalysts behind the adoption of this survey. The data was collected both from previous aerial photographic surveys and metal detectorists with whom a working relationship had been established, and in geophysical survey and field walking undertaken by the author. Survey methodology and the results of the different components of the survey are presented in chapters 2 to 6. Initial interpretations of the features identified from the aerial photographic and geophysical survey are proposed and the main chronological and spatial trends m the distribution of pottery, coins and other small finds are summarised. Chapter 7 compares the results obtained from the different classes of evidence and refines the interpretations offered for the development of the site through time and space. Specific issues considered are the origins of the settlement, its internal organisation and extent and its relationship with nearby Littleborough. The final chapter compares Marton with other sites in the region and sites of a similar type in Roman Britain. A series of hypotheses are then proposed concerning the nature of the site and its function and evolution in its local landscape
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