Conceptualizing Continuous Coverage: A Strategic Model for Wall-to-Wall Local Television Weather Broadcasts

The 2005 hurricane season provided unprecedented opportunities for local television stations to serve the public interest in live, often commercial-free, coverage of severe weather. In this examination of four local television stations' coverage of four Atlantic hurricanes in two Southeastern markets, observed patterns of behavior culminated in the development of the Local Weather Continuous Coverage Model. The study showed that unlike their cable news counterparts, local television news continuous coverage prioritizes weather personnel over live, on-the-scene news reporting. Of all the weather tools used, radar was the most frequently used, followed by watch and warning graphics.     

TIJAH: Embracing IR Methods in XML Databases

This paper discusses our participation in INEX (the Initiative for the Evaluation of XML Retrieval) using the TIJAH XML-IR system. TIJAHs system design follows a standard layered database architecture, carefully separating the conceptual, logical and physical levels. At the conceptual level, we classify the INEX XPath-based query expressions into three different query patterns. For each pattern, we present its mapping into a query execution strategy. The logical layer exploits score region algebra (SRA) as the basis for query processing. We discuss the region operators used to select and manipulate XML document components. The logical algebra expressions are mapped into efficient relational algebra expressions over a physical representation of the XML document collection using the pre-post numbering scheme. The paper concludes with an analysis of experiments performed with the INEX test collection.     

A comparative study of the professional and curricular conceptions of the secondary education science teacher in Spain: possible implications for ongoing teacher education

We compared the professional and curricular conceptions of two samples of secondary education science teachers in Spain, who differed in their years of teaching experience and in whether or not they had participated in a long‐duration scientific‐pedagogical refresher course. Using the data from their responses to a questionnaire, we analysed aspects of their professionalism as teachers (motivation and work satisfaction) and aspects of the curriculum related to content, teaching methods and evaluation. The results show a broader professionalism and a higher level of satisfaction in the case of the teachers with more experience and a higher level of professional training. We found significant differences in whether the pupils' ideas were regarded as erroneous, and in whether laboratory practical work was used to test theory. We conclude by setting out a series of reflections with the aim of working towards improving teachers' ‘professional development’.

Dans cet article, nous comparons les représentations professionnelles et curriculaires de deux échantillons de professeurs de Sciences de l'Enseignement Secondaire en Espagne, selon leur ancienneté et leur éventuelle participation à un cours de remise à niveau scientifique et pédagogique de longue durée. À partir des réponses à un questionnaire, nous avons analysé certains aspects professionnels, tels que la motivation et le degré de satisfaction dans l'exercice de la profession, de même que certains aspects curriculaires touchant les contenus, la méthodologie et l'évaluation. Les résultats démontrent un professionalisme plus important et un plus haut degré de satisfaction chez les professeurs les plus expérimentés et les mieux formés. Nous avons également trouvé des différences significatives en ce qui concerne la prise en compte des idées fausses des élèves ou la mise en place de travaux pratiques en laboratoire pour vérifier la théorie. Il en découle une série de réflexions dans le but d'améliorer le ‘parcours professionnel’ des enseignants.

En este artículo se comparan las concepciones profesionales y curriculares de dos muestras de profesores de Ciencias de Educación Secundaria españoles que difieren en los años de docencia y en la realización o no de un curso de actualización científico‐pedagógica de larga duración. Con los datos de un cuestionario, se analizaron aspectos de la profesionalidad docente, como la motivación y satisfacción en el ejercicio de la profesión, y aspectos curriculares, relacionados con los contenidos, la metodología de enseñanza y la evaluación. Los resultados revelan una profesionalidad más extensa y un mayor nivel de satisfacción en el caso de los profesores con más experiencia y mejor formados. Asimismo, se han encontrado diferencias significativas en asuntos tales como la consideración de las ideas de los alumnos como errores o la realización de prácticas de laboratorio para comprobar la teoría. A partir de ello se plantean una serie de reflexiones que buscan mejorar el ‘desarrollo profesional’ del profesorado.

In disem Artikel werden die Ansichten zu Beruf und Lehrerinhalten von zwei Gruppen von spanischen Erziehungwissenschaftern verglichen, die Pädagogik für den Unterricht an Sekundarschulen lehren und sich darin unterscheiden, dass sie eine unterschiedliche lange Berufserfahrung haben und einige sich wissenschaftlich in zeitlich länger befristeten Kursen fortgebildet haben, andere aber nicht. Die Ergebnisse eines Fragebogens wurden ausgewertet, um bestimmte Aspekte zu untersuchen, die die Arbeit der Dozenten betrifft, so zum Beispiel die Motivation und Zufriedenkeit bei der Ausübung des Berufs sowie Aspekte des Lehrplans, die Unterrichtinhalte, die Methodologie und Fragen der Evaluation betreffen. Die Ergebnisse zeigen, dass die Dozenten mit größerer erfahrung und besser wissenschaftlicher Ausbildung vielseitiger in profesioneller Hinsicht sind und einen höheren grad an Zufriedenkeit aufweisen. Des weiteren konnten wesentliche unterschiede in Punkten wie der Bewertung von Schülerfelehrn oder bei der Durchführung von Praxisstunden im Labor, die der Anwendung der gelernten Theorie dienen, gefunden werden. An diesen Ergebnisse schlieben sich Reflexionen darüber an, wie die berufliche ‘Entwicklung und Fortbildung’ der Dozenten verbessert werden kann.     

Maximal strength and power, muscle mass, endurance and serum hormones in weightlifters and road cyclists

Maximal strength, power, muscle cross-sectional area, maximal and submaximal cycling endurance characteristics and serum hormone concentrations of testosterone, free testosterone and cortisol were examined in three groups of men: weightlifters (n = 11), amateur road cyclists (n = 18) and age-matched controls (n = 12). Weightlifters showed 45-55% higher power values than road cyclists and controls, whereas the differences in maximal strength and muscle mass were only 15% and 20%, respectively. These differences were maintained when average power output was expressed relative to body mass or relative to muscle cross-sectional area. Road cyclists recorded 44% higher maximal workloads, whereas submaximal blood lactate concentration was 50-55% lower with increasing workload than in controls and weightlifters. In road cyclists, workloads associated with blood lactate concentrations of 2 and 4 mmol.l-1 were 50-60% higher and occurred at a higher percentage of maximal workload than in weightlifters or controls. Basal serum total testosterone and free testosterone concentrations were lower in elite amateur cyclists than in age-matched weightlifters or untrained individuals. Significant negative correlations were noted between the individual values of maximal workload, workloads at 2 and 4 mmol.l-1 and the individual values of muscle power output (r = -0.37 to -0.49), as well as the individual basal values of serum total testosterone and free testosterone (r = -0.39 to -0.41). These results indicate that the specific status of the participants with respect to training, resistance or endurance is important for the magnitude of the neuromuscular, physiological and performance differences observed between weightlifters and road cyclists. The results suggest that, in cycling, long-term endurance training may interfere more with the development of muscle power than with the development of maximal strength, probably mediated by long-term cycling-related impairment in anabolic hormonal status.     

Bayes统计与经典统计方法及其在水文水资源中的应用

对 Bayes统计和经典统计方法的基本思想、理论基础做了较全面的比较 ,指出了二者的主要差异在于信息的利用和概率假设上。二者的相似之处在于它们的统计推断思想基础一致 ,都是基于似然函数。此外 ,还就二者在水文水资源分析中的应用做了说明。     

Intraoperative ERCP and endoscopic sphincterotomy combined with laparoscopic cholecystectomy for treatment of cholelithiasis with choledocholithiasis

Objective: To evaluate the benefit of intraoperative ERCP and endoscopic sphincterotomy (EST) combined with laparoscopic cholecystectomy (LC) in the treatment of cholelithiasis with choledocholithiasis. Methods: Fifty-two patients with cholelithiasis and choledocholithiasis (as determined by intraoperative cholangiography) were randomly divided into 2 groups during LC. In group A (27 patients), common bile duct stones were extracted by intraoperative EST during LC. In group B(25 patients), common bile duct (CBD) stones were extracted by conversion to open CBD exploration and cholecyctectomy. Results: The success rate was 26/27 (96.3%) in group A and 25/25 (100%) in group B (0.25<P<0.5); The mean postoperative hospitalization was 3.32±0.56 days in group A and 17.5±4.61 days in group B (P<0.001). In group A, two cases were complicated transient hyperamylasemia after the combined procedure. In group B, one case of bile leakage and one case of duodenal ulcer occurred after conversion to open cholecystectomy with CBD exploration. There were no retained stones in group A but 2 cases in group B. Conclusion: Intraoperative ERCP and endoscopic sphincterotomy combined with LC for treatment of cholelithiasis and chiledochlithiasis is safe, effective and results in shorter hospitalization and fewer complications than traditional open cholecystectomy with CBD exploration.     

谈教学改革与能力体系建设工作

为社会需求培养人才是学校工作的目标。该文主要就能力体系建设等一系列教学改革问题提出了具体原则、目标及能力体系建设的步骤与方法。