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Penn Library\u27s Ms. Codex 1675 - [Alchemical compendium]. (Video Orientation)
No full texthttps://repository.upenn.edu/sims_video/1157/thumbnail.jp
Penn Library\u27s LJS 405 - Kitāb al-Siyāsah al-sharʻīyah al-musammá tasʹhīl ... (Video Orientation)
No full texthttps://repository.upenn.edu/sims_video/1159/thumbnail.jp
Collation Model for Oversize Ms. Codex 62: [Legal proceedings]
Get PDFProceedings of a suit between the brothers Constantius and Daniel de Vicario and Jacobus de Pego, syndicus fiscalis. Notarized by Jacobus de Guida (f. 109r).https://repository.upenn.edu/sims_models/1062/thumbnail.jp
The Impact of the JUNTOS Conditional Cash Transfer Programme on Foundational Cognitive Skills: Does Age of Enrollment Matter?
Get PDFThis paper studies the relationship between the age of enrolment in Peru’s conditional cash transfer programme, JUNTOS, and the foundational cognitive skills of a sample of children aged between 5 and 12 years old. Using a difference-in-differences approach and exploiting within-household variation, we show that younger siblings in recipient households display significantly higher levels of inhibitory control than their older counterparts (0.11 standard deviations), having benefited from the programme for the first time at a relatively earlier age. In high-income countries, this behavioural trait has been linked to later-life outcomes such as job success, physical health, and even reduced risk of criminality. Conversely, we find little evidence that enrolment age is associated with long-term memory, working memory, or implicit learning. Employing a threshold estimator, we show that relative gains in inhibitory control are most clearly defined where a child benefits from the programme before they reach 80 months of age (6.7 years). In an extension to our main results, we then conduct mediation analysis, demonstrating that a small but meaningful proportion of this benefit (6.5%) operates through changes in the probability of the child’s timely entry into primary school
Collation Model for LJS 48: Instrumenta feudorum castri Sone : cum privilegio comitatus in persona[m] Don Ioannis et fratrum ac descendentium de Faelis.
Get PDFNotarial copies of decrees and grants relating to Giovanni Faella of Verona and his family, mostly written by imperial notary Francesco di Andrea Ruffo in 1504, with a long addition by imperial notary Alessandro di Nicolo Medico dated 1530.https://repository.upenn.edu/sims_models/1074/thumbnail.jp
Collation Model for Ms. Codex 1589: [Texts for the Commemorative Office of the Virgin Mary and notated Office of the Dead]
Get PDFBenedictine manuscript containing texts for Matins and Lauds from the Commemorative Office of the Virgin. This version of the Office was said most often on Saturday in place of the usual Office of the day. Also contains the Office of the Dead accompanied by musical notation for the chants. The manuscript once had leather finding tabs flush to the edge of the leaves, all but one (f. 96) of which have been torn out (for example, f. 1, 7, 69).https://repository.upenn.edu/sims_models/1090/thumbnail.jp
Collation Model for Oversize Ms. Codex 108: Splendor solis oder Sonnen Glantz
Get PDFAlchemical treatise about the philosophers\u27 stone divided into seven tracts. Written in Germany in the second half of the 16th century.https://repository.upenn.edu/sims_models/1095/thumbnail.jp
Collation Model for Ms. Codex 1076: [Prolegomena in Aristotelem] Volume 2
Get PDFLecture notes in Latin based on the works of Aristotle, notably the theories on universals, material, form, substance, astronomy, and geometry from the Physics, and logic and rhetoric from the Metaphysics, with tables of contents included at the end of each volume. Written in Italy in 1598. This is the model for Volume 2.https://repository.upenn.edu/sims_models/1098/thumbnail.jp
The Effect of Different Surface Treatments on The Bond Strength of Zirconia
Get PDFObjectives: The purpose of the study was to evaluate the influence of various surface treatment methods on the resin bond durability of zirconia.
Methods: Hundred KATANA Zirconia STML (n=20) specimens were sectioned and sintered in an induction furnace (CEREC SpeedFire, Dentsply Sirona, Germany). Specimen surfaces were ground finished with 800 grit silicon carbide abrasive with cooling water and cleaned in an alcohol bath ultrasonically before cementation for 5 min, and thoroughly washed again with running distilled water. Specimens in Group 1 had no surface treatment, Group 2 was air-abraded with 50 μm aluminum oxide, Group 3 was air abraded with glass bead particles, Group 4 specimens were immersed in Zircos E etching solution for 2 h and Group 5 specimens were immersed in 48% Hydrofluoric acid solution heated at 25oC for 30 min. Cylindrical composite resin specimens (2.1 mm in diameter, 3 mm in height) were bonded to the zirconia samples with self-adhesive resin cement Panavia V5 (PV5, after application of ceramic primer) following manufacturers’ instructions. A load of 1000 g was applied to the composite cylinders during bonding in an alignment apparatus, then light cured for 80 s.
Each main group was divided into two subgroups (n = 10/each). Half of the samples were tested for SBS after 48 h in distilled water at 37o C (100-percent humidity), 10
then subjected to 10,000 thermo cycles and the other half were tested after 10,000 thermo cycles.
Shear bond strength was determined using a universal testing machine at a crosshead speed of 0.5 mm/m expressed in MPa. The fractured surfaces of specimens were inspected with a stereo microscope and classified as adhesive, cohesive, or mixed failures. One-way ANOVA test and paired t- test was applied for statistical analysis.
Results: All four surface treatment methods tested were significantly different from each other and with the control group (no surface treatment). Mean shear bond strength values for group1 8.316(SD 1.953), group 2 14.976(SD 3.189), group 3 9.286(SD 0.985), group 4 4.831(SD 0.468), and group 5 14.796(SD 0.829). The mean shear bond strength values for all the groups decreased significantly after thermocycling.
Conclusions: According to the results of this in vitro study, air abrasion and heated hydrofluoric acid proved to be better methods for surface treatment of zirconia as compared to other methods. Newly launched zirconia etching solution containing hydrofluoric acid (HF), hydrochloric acid (HCl), sulfuric acid (H2SO4), nitric acid (HNO3), and phosphoric acid (H3PO4) performed poorly as surface treatment agents in increasing the bond strength of zirconia