125,072 research outputs found
Going 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
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
Weight Loss and Eating Pattern 7 Years After Sleeve Gastrectomy. Experience of a Bariatric Center of Excellence
No full textPurpose: Report the analysis from a single center series of consecutive primary sleeve gastrectomy (SG) on the factors affecting weight loss at long term. Materials and Methods: Patients submitted to primary SG with a follow-up of 7 years were screened. Weight loss was evaluated with %excess weight loss (%EWL) and %excess BMI loss (%BMIL). Weight regain (WR) was defined as in increase of 25% of the obtained %EWL and insufficient weight loss (IWL) as loss < 50% EWL. Eating behaviors were evaluated with 7 days record (7dR). All the variables potentially affecting the weight loss were cross-matched for correlation. The study population was divided in three groups: group A (WR), group B (IWL), and group C (sustained weight loss) for comparative analysis. Results: A total of 86 patients (21 M/65 F) with a preoperative BMI of 47.08 ± 6.15 kg/m2 were evaluated. Cumulative 7 years weight loss was as follows: 61.66 ± 22.69% EWL and 32 ± 9% EBMIL. A total of 4.6% had an IWL while 27.9% a WR. The analysis showed a significant difference among the daily calories and fats consuming, number of meals, physical activity, grazing/sweet eating habits, and adherence to follow-up (p < 0.05) between groups A and C. Cox hazard demonstrated a significant risk (p < 0.05) to WR in case of adherence to follow-up shorter than 48 months, high daily calories, and fats intake (hazard ratio (HR) range 5–9). Eight patients (9.3%) had a surgical revision. Conclusion: Our data demonstrated that long-term results (7 years) of SG are strongly related to eating habits and patient’s behaviors
Statistical Correlation Between Hourly and Daily Values of Solar-radiation On Horizontal Surface At Sea-level In the Italian Climate
No full textThe knowledge of hourly data of solar radiation is required for many practical applications. Since hourly data are measured only in a few stations, it is quite useful to have methods to calculate hourly values starting from daily data. In this paper we analyse the hourly data measured in Italian stations and propose a method to estimate hourly solar radiation. The approximation introduced by our method in estimating mean values is comparable with its statistical error. The curves we obtain are independent of season and station and depend only on the ratio K of experimental global solar radiation to extraatmospheric radiation. They can be fitted by paraboles whose coefficients can be written as a simple analytical expression of the K ratio. The variance of experimental data around means has been analysed. The statistical method we propose allows to reproduce the distribution of hourly values of solar radiation in a satisfactory way starting from the daily values of solar radiation.Pour de nombreuses applications pratiques, il est nécessaire de connaitre les données horaires du rayonnement solaire. Comme les données horaires ne sont mesurées que dans peu de stations, il faut disposer de méthodes permettant de calculer les valeurs horaires en partant de données journalières. Dans cet article, on analyse les données horaires de stations italiennes et on propose une méthode d'estimation du rayonnement solaire horaire. L'approximation introduite dans l'estimation des valeurs moyennes est comparable à l'erreur statistique. Les courbes obtenues sont indépendantes de la saison et de la station et ne dépendent que du rapport K entre le rayonnement solaire global expérimental et le rayonnement extra-atmosphérique. Elles peuvent être approchées par des paraboles dont les coefficients s'écrivent sous forme d'expressions analytiques simples du rapport K. La variance des données expérimentales autour des moyennes a été analysée. La méthode statistique proposée permet de reproduire la distribution de valeurs horaires du rayonnement solaire de façon satisfaisante en partant de valeurs journalières du rayonnement solaire
Elastic constants of a Pd85Pt15 single crystal containing hydrogen
No full textSound velocity measurements carried out between 10 and 300 K in a Pd85Pt15 single crystal at 0 and 0.29 H contents for five different propagation modes, have shown that C', C44 and CT are strongly decreased by H loading (CT=1/3(C11-C12+C44). Smaller relative changes are observed for longitudinal modes. The bulk modulus as well as the anisotropy factor turn out to be increased by H impurities. The Debye temperature at absolute zero is found to be 271±5 K for n=0 and 264 ±5 K for n=0.29
Recombinant alpha 2b interferon (alpha-2b-IFN), chlorambucil, and prednisone in advanced chronic lymphocytic leukemia (CLL)
No full textNo abstract availabl
The unsolved case of “bone-impairing analgesics”. The endocrine effects of opioids on bone metabolism
No full textThe current literature describes the possible risks for bone fracture in chronic analgesics users. There are three main hypotheses that could explain the increased risk of fracture associated with central analgesics, such as opioids: 1) the increased risk of falls caused by central nervous system effects, including sedation and dizziness; 2) reduced bone mass density caused by the direct opioid effect on osteoblasts; and 3) chronic opioid-induced hypogonadism. The impact of opioids varies by sex and among the type of opioid used (less, for example, for tapentadol and buprenorphine). Opioid-associated androgen deficiency is correlated with an increased risk of osteoporosis; thus, despite that standards have not been established for monitoring and treating opioid-induced hypogonadism or hypoadrenalism, all patients chronically taking opioids (particularly at doses ≥100 mg morphine daily) should be monitored for the early detection of hormonal impairment and low bone mass density
The pyrethroid knock-down resistance gene in the Anopheles gambiae complex in Mali and further indication of incipient speciation within An. gambiae s.s.
No full textIn Mali the Anopheles gambiae complex consists of An. arabiensis and Mopti, Savanna and Bamako chromosomal forms of An. gambiae s.s. Previous chromosomal data suggests a complete reproductive isolation among these forms. Sequence analysis of rDNA regions led to the characterization of two molecular forms of An. gambiae, named M-form and S-form, which in Mali correspond to Mopti and to Savanna/Bamako, respectively, while it has failed so far to show any molecular difference between Savanna and Bamako. The population structure of An. gambiae s.l. was analysed in three villages in the Bamako and Sikasso areas of Mali and the frequency of pyrethroid resistance of the knock-down resistance (kdr) type was calculated. The results show that the kdr allele is associated only with the Savanna form populations and absent in sympatric and synchronous populations of Bamako, Mopti and An. arabiensis. This is the first molecular indication of barriers to gene flow between the Bamako and Savanna chromosomal forms. Moreover, analyses of specimens collected in the Bamako area in 1987 show that the kdr allele was already present in the Savanna population at that time, and that the frequency of this allele has gradually increased since then
Pragmatic Case Studies as a Source of Unity in Applied Psychology
No full textTo unify or not to unify applied psychology: that is the question. In this article we review pendulum swings in the historical efforts to answer this question—from a comprehensive, positivist, “top-down,” deductive yes between the 1930s and the early 60s, to a postmodern no since then. A rationale and proposal for a limited, “bottom-up,” inductive yes in applied psychology is then presented, employing a case-based paradigm that integrates both positivist and postmodern themes and components. This paradigm is labeled “pragmatic psychology” and, its specific use of case studies, the “Pragmatic Case Study Method” (“PCS Method”). We call for the creation of peer-reviewed journal-databases of pragmatic case studies as a foundational source of unifying applied knowledge in our discipline. As one example, the potential of the PCS Method for unifying different angles of theoretical regard is illustrated in an area of applied psychology, psychotherapy, via the case of Mrs. B. The article then turns to the broader historical and epistemological arguments for the unifying nature of the PCS Method in both applied and basic psychology.Peer reviewe
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