1,721,032 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Renal cell carcinoma and acquired cystic disease of the kidneys in patients on long-term hemodialysis
Get PDF1)ACDKに合併する腎細胞癌は, 若年の男性で長期透析例に発生が多くみられる. 2)ACDKに合併する腎細胞癌の診断は, 超音波検査とCT scanを併用することによりほぼ100%診断可能と考える. 3)ACDKに合併する腎細胞癌は, 悪性度が低いと考えられ, 患側の腰部斜切開による腹膜外の単純腎摘除術で十分対処可能と考えられる. 4)若年の男性で3年以上の長期透析例では, 定期的な腎のスクリーニングが必要であるSince the first report in 1977 by Dunnill et al., a substantial number of articles have been written concerning the complications of acquired cystic disease of the kidneys (ACDK) and renal cell carcinoma developing in the native kidneys of patients undergoing long-term hemodialysis. The incidence has been reported to be 35% to 95% of ACDK in patients undergoing long-term hemodialysis. In addition, renal cell carcinoma has been described in 4% to 7% of the ACDK. The etiology of ACDK and renal cell carcinoma in the native kidneys of patients undergoing long-term hemodialysis remains unresolved. Because ACDK and renal cell carcinoma are usually asymptomatic, several reports described the use of imaging studies in the native kidneys of patients undergoing long-term hemodialysis and suggest a variety of management schemes to screen or monitor the status of the native kidneys. Ultrasonography is the most common screening study, but CT scan is more sensitive. Both studies are necessary to diagnose ACDK and renal cell carcinoma in the native kidneys of patients. We review our 10 cases and the Japanese literature with particular attention to the diagnosis and treatment of patients with ACDK and renal cell carcinoma. Our findings were similar to those reported by others. Patients receiving dialysis treatment for more than three years should have a baseline radiologic examination of the kidneys so that subsequent problems can be more easily identified and evaluated. The best surgical treatment for patients with ACDK and renal cell carcinoma is simple nephrectomy by flank incision in order to prevent surgical side effects, for example postoperative bleeding
The relationships among DNA ploidy type determined by laser scanning cytometry, the overexpression of p53 protein and the numerical aberrations of chromosome 7 in bladder cancer
Get PDF膀胱癌においてp53タンパクの過剰発現と染色体7番の異常, ならびにDNA aneuploidyに相関を認めた.したがってp53の異常が染色体数の異常にかかわっている可能性があると考えるThe cellular DNA content of certain malignancies is regarded as a prognostic parameter. The mutant p53 is thought to destabilize centrosome replication, which leads to aberrant mitosis and chromosome instability. We investigated the relationship among DNA ploidy pattern type, numerical aberrations of chromosome 7 and p53 overexpression in 20 transitional cell carcinomas of the urinary bladder. The DNA ploidy pattern type was determined by laser scanning cytometry, while p53 overexpression was investigated immunohistochemically. Using fluorescence in situ hybridization with chromosome-specific probes, the copy number of chromosome 7 was counted by touch preparations of interphase nuclei. The cytometric analysis revealed that the DNA patterns were highly correlated with both the numerical aberrations of chromosome 7 (p = 0.0002) and the overexpression of p53. The incidences of p53 overexpression in DNA aneuploid tumors and DNA diploid ones were 78% and 10%, respectively (p = 0.0017). Our results suggest that the overexpression of abnormal p53 protein induces DNA aneuploidy in bladder cancer
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Acquired renal cystic disease
Get PDFIn 1977, Dunnill et al. described a new disorder, bilateral multiple renal cystic disease. It occurred among hemodialysis patients whose original illness had not been cyst-related. Acquired cystic disease of the kidney (ACDK) is commonly observed in patients undergoing hemodialysis. The incidence of ACDK is 40-50% in reports of autopsy and surgical specimens, rising to more than 90% after 5-10 years of dialysis. The volume of the kidneys decreases in the first 3 years of dialysis and then increases as the rate of cyst formation increases. In male patients undergoing long-term hemodialysis the incidence of ACDK is markedly high. ACDK is also found in patients before hemodialysis. The primary concern in patients with ACDK is the increased incidence (5-19%) of renal cell carcinoma (RCC). The incidence is about twelve to eighteen times higher than that in the general population and the cancers may be asymptomatic. Therefore, screening is essential if carcinomas are to be detected early. Regular screening by ultrasonic examination or CT scan is needed. A patient requires nephrectomy when the kidney cancer exists or is suspected by dynamic CT scan. Nephrectomy is performed only on the side with renal mass. It has been argued that RCC associated with ACDK are innocuous and do not predispose the patient to an increased risk of death from RCC. RCC arising from ACDK is considered to be a tumor of low malignant potential, compared with classic RCC. However, RCC has been reported to metastasize in 16% of the patients on dialysis and to be the cause of death in 2% of the kidney transplant recipients. The etiology of ACDK is unclear and its incidence increases with the duration of dialysis. ACDK patients have a propensity to develop adenocarcinoma. The increased incidence of RCC in ACDK patients warrants careful radiologic monitoring of end-stage kidneys in selected patients
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