A New Method of Revealing Armourers’ Marks     

Alan Williams  David Edge  Francesco Grazzi  Nikolai Kardjilov 《文物保护研究》2019,64(1):10-15

In this research, we performed radiographic experiments exploiting polychromatic phase-contrast imaging, a method for contrast enhancement in transmitted neutron beams by measuring a sample made with a homogeneous material but exhibiting a different microstructure induced by mechanical actions. We were able to reveal the armourers’ marks now obscured by polishing that are present in these examples of medieval armour.  相似文献   

The impact of virtual simulation tools on problem-solving and new product development organization     

Markus C. Becker  Pasquale Salvatore  Francesco Zirpoli 《Research Policy》2005,34(9):1305-1321

New product development nowadays makes heavy use of IT instruments such as virtual simulation tools. The main motivation for introducing virtual simulation tools in new product development is to speed up development and lower its cost. Virtual simulation tools, however, do much more. They introduce profound changes in the organization, including the nature of problem-solving, bearing the potential to increase new product development performance beyond cost and lead time reduction. Understanding these profound changes, we argue, holds the key to unlocking the potential of virtual simulation tools for improving new product development performance, including more innovative products. We support our argument with a case study from the European auto industry.  相似文献   

Topological interpretation of the inverse connection matrix A^.s_b     

Pasquale Pugliese  Francesco Vacca 《Journal of The Franklin Institute》1976,302(4):367-374

This paper discusses a new algebraic model of electrical networks by which a deeper understanding is achieved of the interrelation existing between a system of independent cut sets and the corresponding system of independent “contours”, in the sense of orthogonal network theory (1).The new model allows, by a redefinition of f-cut sets, to give an interpretation in terms of linear graph theory to the inverse connection matrix A^.s_b, i.e. to the transformation matrix between voltages in the orthogonal and the primitive reference frames, for a general choice of independent contours.Furthermore, a directly algebraic derivation of the voltage transformation is presented, recalling the properties of dual vector spaces and without invoking the principle of invariance of the instantaneous power.  相似文献   

Larger differences in utilization of rarely requested tests in primary care in Spain     

Maria Salinas  Maite López-Garrigós  Emilio Flores  Joaquín Uris  Carlos Leiva-Salinas 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2015,25(3):410-415

Introduction

The study was performed to compare and analyze the inter-departmental variability in the request of rarely requested laboratory tests in primary care, as opposed to other more common and highly requested tests.

Materials and methods

Data from production statistics for the year 2012 from 76 Spanish laboratories was used. The number of antinuclear antibodies, antistreptolysin O, creatinine, cyclic citrullinated peptide antibodies, deaminated peptide gliadine IgA antibodies, glucose, protein electrophoresis, rheumatoid factor, transglutaminase IgA antibodies, urinalysis and uric acid tests requested was collected. The number of test requests per 1000 inhabitants was calculated. In order to explore the variability the coefficient of quartile dispersion was calculated.

Results

The smallest variation was seen for creatinine, glucose, uric acid and urinalysis; the most requested tests. The tests that were least requested showed the greatest variability.

Conclusion

Our study shows through a very simplified approach, in a population close to twenty million inhabitants, how in primary care, the variability in the request of laboratory tests is inversely proportional to the request rate.Key words: primary care, laboratory proficiency testing, clinical laboratory services, test requesting, preanalytical phase  相似文献   

Education and communication is the key for the successful management of vitamin D test requesting     

Maria Salinas  Maite López-Garrigós  Emilio Flores  María Leiva-Salinas  Miguel Ahumada  Carlos Leiva-Salinas 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2015,25(2):237-241

Introduction

Pre-preanalytical and post-postanalytical phases are steps where the laboratory professional may play a crucial role. Measuring the serum circulating 25 hydroxyvitamin D level (25(OH)D) is recommended to evaluate vitamin D status in patients at risk for vitamin D deficiency while 1,25 hydroxyvitamin D (1,25(OH)₂D) is only recommended to monitor several particular conditions (chronic kidney disease, hereditary phosphate-losing disorders, and some other) clearly defined by the current clinical guidelines of Endocrine Society.
Our research hypothesis was that through education and communication through comments in the Laboratory Information System (LIS), we could improve appropriateness in the request vitamin D tests.

Materials and methods

A retrospective observational cross-sectional study was conducted from January 2005 to December 2014. Each 1,25(OH)₂D request was reviewed individually by a member of the laboratory staff. Starting in November 2011, each inappropriate 1,25(OH)₂D request was registered in LIS and 25(OH)D was measured instead of 1,25(OH)₂D. We counted the overall number of 1,25(OH)₂D requests and the number of inappropriate requests which then were marked with a comment.

Results

The request of 25(OH)D increased along years. However, 1,25(OH)₂D requests increased until 2012 when demand began to diminish.

Conclusions

Education and communication through comments in the LIS, corrected the inappropriate request of 1,25(OH)₂D and promoted the use of 25(OH)D to study vitamin D deficiency.Key words: clinical laboratory services, utilization, vitamin D, communication, education  相似文献   

Weighted Word Pairs for query expansion     

Francesco Colace  Massimo De Santo  Luca Greco  Paolo Napoletano 《Information processing & management》2015

This paper proposes a novel query expansion method to improve accuracy of text retrieval systems. Our method makes use of a minimal relevance feedback to expand the initial query with a structured representation composed of weighted pairs of words. Such a structure is obtained from the relevance feedback through a method for pairs of words selection based on the Probabilistic Topic Model. We compared our method with other baseline query expansion schemes and methods. Evaluations performed on TREC-8 demonstrated the effectiveness of the proposed method with respect to the baseline.  相似文献   

A computer science and robotics integration model for primary school: evaluation of a large-scale in-service K-4 teacher-training program     

El-Hamamsy  Laila  Chessel-Lazzarotto  Frédérique  Bruno  Barbara  Roy  Didier  Cahlikova  Tereza  Chevalier  Morgane  Parriaux  Gabriel  Pellet  Jean-Philippe  Lanarès  Jacques  Zufferey  Jessica Dehler  Mondada  Francesco 《Education and Information Technologies》2021,26(3):2445-2475

Education and Information Technologies - Integrating computer science (CS) into school curricula has become a worldwide preoccupation. Therefore, we present a CS and Robotics integration model and...  相似文献   

Knowledge coherence, variety and economic growth: Manufacturing evidence from Italian regions   总被引：2，自引：0，他引：2  

Francesco Quatraro 《Research Policy》2010,39(10):1289-1302

This paper elaborates a view on knowledge as a result of a combinatorial search activity, so as to investigate its effects on economic growth at the regional level. Empirical estimations corroborate the hypothesis that knowledge coherence and variety, besides the traditional measure of knowledge stock, matter in shaping regional economic performances. The check for spatial dependence suggests that cross-regional externalities exert additional triggering effects on growth, without debasing the effects of knowledge properties. Important policy implications stem from the analysis, in that regional innovation strategies should be carefully coordinated so as to reach a higher degree of internal coherence and trigger economic performances.  相似文献   

Cultural practices in Italian family conversations: Verbal conflict between parents and preadolescents     

Francesco Arcidiacono  Clotilde Pontecorvo 《European Journal of Psychology of Education - EJPE》2009,24(1):97-117

This work studies verbal conflict between parents and preadolescents through analysis of family dinnertime conversations. We move from the assumption that verbal conflict is an educational instrument of interaction and a tool of socialization. The aim of the research is to analyze the participants' strategies in situations of conflict and to highlight the relations between parents and preadolescents in these specific situations. The data collection methodology is mainly ethnographical: videotape recordings of Italian middle class family dinners (the families were selected as being dual career ones with two children) were fully transcribed and codified following the approach of Conversation Analysis. The results of the quantitative (by the use of the log-linear models) and qualitative analyses confirm the importance of verbal conflict in family context as a particular cultural strategy of relationships between parents and preadolescents. The analytical data underline the relations between different aspects of conflict and the pragmatic implications for all family members at dinnertime conversations.  相似文献   

The Digital Skin Series     

Emilio Vavarella 《Visual Communication Quarterly》2016,23(3):188-195

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