186,938 research outputs found
Kesan penambahan protein soya terhadap pengerasan & kekuatan mampatan simen brushit-HA
No full textKajian ini meliputi penyediaan simen kalsium fosfat yang terdiri daripada campuran serbuk brushit (DCPD) dan hidroksiapatit (HA) yang dihasilkan secara sintesis dalam makmal. Larutan penimbal digunakan sebagai fasa cecair dan dicampurkan dengan campuran serbuk DCPD dan HA bagi menghasilkan simen tulang secara in situ dengan nisbah cecair kepada serbuk (L/P) antara 0.26 – 0.36 mL g-1. Sodium alginat dan protein soya ditambahkan ke dalam simen kalsium fosfat dan dikaji kesannya terhadap simen yang dihasilkan. Keputusan kajian menunjukkan simen kalsium fosfat dapat dihasilkan pada nisbah L/P 0.32 mL g-1 dengan penambahan 1%bt sodium alginat dan 1%bt protein soya dengan kebolehsuntikan yang maksimum (100%) dan tempoh pengerasan selama 26 min. Penambahan protein soya juga telah meningkatkan kekuatan mampatan simen tulang daripada 2.90 MPa (tanpa protein) kepada 3.98 MPa pada 1.5%bt protein. Simen kalsium fosfat-protein soya yang dihasilkan juga menunjukkan sifat kebioaktifan. Pertumbuhan apatit berlaku pada hari ke-3 selepas rendaman di dalam larutan simulasi badan (SBF) dan membesar dengan perlanjutan tempoh rendaman
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Firms’ moral hazard in sickness absences
No full textSick workers in many countries receive sick pay during their illness- related absences from the workplace. In several countries, the social security system insures firms against their workers’ sickness absences. However, this insurance may create moral hazard problems for firms, leading to the inefficient monitoring of absences or to an underinvestment in their prevention. In the present paper, we investigate firms’ moral hazard problems in sickness absences by analyzing a legislative change that took place in Austria in 2000. In September 2000, an insurance fund that refunded firms for the costs of their blue-collar workers’ sickness absences was abolished (firms did not receive a similar refund for their white-collar workers’ sickness absences). Before that time, small firms were fully refunded for the wage costs of blue- collar workers’ sickness absences. Large firms, by contrast, were refunded only 70% of the wages paid to sick blue-collar workers. Using a difference-in-differences-in-differences approach, we estimate the causal impact of refunding firms for their workers’ sickness absences. Our results indicate that the incidences of blue-collar workers’ sicknesses dropped by approximately 8% and sickness absences were almost 11% shorter following the removal of the refund. Several robustness checks confirm these results.absenteeism, moral hazard, sickness insurance
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
Firms’ moral hazard in sickness absences
No full textSick workers in many countries receive sick pay during their illness- related absences from the workplace. In several countries, the social security system insures firms against their workers’ sickness absences. However, this insurance may create moral hazard problems for firms, leading to the inefficient monitoring of absences or to an underinvestment in their prevention. In the present paper, we investigate firms’ moral hazard problems in sickness absences by analyzing a legislative change that took place in Austria in 2000. In September 2000, an insurance fund that refunded firms for the costs of their blue-collar workers’ sickness absences was abolished (firms did not receive a similar refund for their white-collar workers’ sickness absences). Before that time, small firms were fully refunded for the wage costs of blue- collar workers’ sickness absences. Large firms, by contrast, were refunded only 70% of the wages paid to sick blue-collar workers. Using a difference-in-differences-in-differences approach, we estimate the causal impact of refunding firms for their workers’ sickness absences. Our results indicate that the incidences of blue-collar workers’ sicknesses dropped by approximately 8% and sickness absences were almost 11% shorter following the removal of the refund. Several robustness checks confirm these results.absenteeism, moral hazard, sickness insurance
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
sj-pdf-1-epb-10.1177_23998083221081529 – Supplemental Material for Exploiting COVID-19 related traffic changes to evaluate flow dependency of an FCD-defined congestion measure
No full textSupplemental Material, sj-pdf-1-epb-10.1177_23998083221081529 for Exploiting COVID-19 related traffic changes to evaluate flow dependency of an FCD-defined congestion measure by Megan M Bruwer and Simen J Andersen in Environment and Planning B: Urban Analytics and City Science</p
Firms' Moral Hazard in Sickness Absences
No full textSick workers in many countries receive sick pay during their illness-related absences from the workplace. In several countries, the social security system insures firms against their workers' sickness absences. However, this insurance may create moral hazard problems for firms, leading to the inefficient monitoring of absences or to an underinvestment in their prevention. In the present paper, we investigate firm' moral hazard problems in sickness absences by analyzing a legislative change that took place in Austria in 2000. In September 2000, an insurance fund that refunded firms for the costs of their blue-collar workers' sickness absences was abolished (firms did not receive a similar refund for their white-collar workers' sickness absences). Before that time, small firms were fully refunded for the wage costs of blue-collar workers' sickness absences. Large firms, by contrast, were refunded only 70% of the wages paid to sick blue-collar workers. Using a difference-in-differences-in-differences approach, we estimate the causal impact of refunding firms for their workers' sickness absences. Our results indicate that the incidences of blue-collar workers' sicknesses dropped by approximately 8% and sickness absences were almost 11% shorter following the removal of the refund. Several robustness checks confirm these results.absenteeism, moral hazard, sickness insurance
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
- …
