Search results for "STING"

Work–family conflict and psychological well-being: Stability and cross-lagged relations within one- and six-year follow-ups

2008

Abstract The rank-order stability and cross-lagged relations between work-to-family conflict (WFC), family-to-work conflict (FWC), and psychological well-being were examined in two longitudinal studies with full two-wave panel designs. In Study 1 ( n  = 365), the time lag was one year, and in Study 2 ( n  = 153), six years. The Structural Equation Modeling showed that the stability for WFC was .69 over one and .73 over six years. The respective stabilities for FWC were .57 and .48. Cross-lagged relations were not detected between WFC/FWC and low psychological well-being (job exhaustion, marital adjustment, parental stress, and psychological distress), expected to exist on the basis of the i…

Boosting organizational learning through team-based talent management: what is the evidence from large Spanish firms?

2013

Talent management (TM) can crucially help optimize organizational learning (OL) processes. The aim of this article is to study whether certain TM practices related to teamwork design and dynamics stimulate and develop learning (i.e. knowledge creation) processes within the organization and across the different ontological levels (individual, group and organizational–institutional). A model linking team-based TM and OL is tested in a sample of large Spanish companies. Our empirical results emphasize the distinction between individual–group and institutional levels of learning as the two pillars of OL. The results also highlight the role of team autonomy and creativity as crucial factors for …

Do Unnecessary Tasks Impair Performance Because They Harm Living a Calling? : Testing a Mediation in a Three-Wave Study

2021

This three-wave study explored whether living a calling (at work) mediated the relation between unnecessary tasks (time wasting work tasks) and socio-contextual performance at work (cynicism, organizational citizenship behavior). Participants were 518 Finnish white- and blue-collar employees, who were followed up in 2018, 2019, and 2020. The results of structural equation modeling showed that unnecessary tasks at Time 1 related negatively to living a calling at Time 2, which, in turn, related to cynicism and organizational citizenship behavior at T3. Thus, living a calling mediated the relation between unnecessary tasks and the outcomes. We found no evidence for the moderator role of living…

Influence of formalin fixation on the biomechanical properties of human diaphyseal bone.

2010

Owing to the lack of fresh human bones, formalin-fixed specimens are frequently used in biomechanical testing. However, formalin fixation is assumed to affect the biomechanical properties of bone. The aim of this study was to compare axial and torsional stiffness and bone mineral density in fresh and embalmed human bones. The subtrochanteric regions of 12 pairs of fresh human femora were randomised into two groups for paired comparison. After bone mineral density measurement, one group was preserved in 4% formalin. After 6 weeks, bone mineral density was remeasured and each specimen underwent axial and torsional loading. The formalin group showed significant higher stiffness values for tors…

Experimental strength of restorations with fibre posts at different stages, with and without using a simulated ligament

2011

The aim of this study was to analyse the strength and failure mode of teeth restored with fibre posts under retention and flexural-compressive loads at different stages of the restoration and to analyse whether including a simulated ligament in the experimental setup has any effect on the strength or the failure mode. Thirty human maxillary central incisors were distributed in three different groups to be restored with simulation of different restoration stages (1: only post, 2: post and core, 3: post-core and crown), using Rebilda fibre posts. The specimens were inserted in resin blocks and loaded by means of a universal testing machine until failure under tension (stage 1) and 50o flexion…

2021

The aim of the study was to (1) assess the within-session reliability of a unilateral isometric hex bar pull (UIHBP) maximal voluntary contraction (MVC) test and, (2) determine unilateral isometric absolute peak force (PFabs) and relative peak force (PF) values in freeski athletes. Twenty-one male and eight female academy to national team freeskiers performed the novel UIHBP MVC task on a force plate and PFabs and relative PF were assessed (1000 Hz). Within-session measures of PFabs offered high reliability on left and right limbs for males (ICC = 0.91–0.94, CV = 2.6–2.2%) and females (ICC = 0.94–0.94, CV = 1.4–1.6%), while relative PF measures showed good to high reliability in both left a…

In-vitro fatigue and fracture performance of three different ferrulized implant connections used in fixed prosthesis

2021

Background/purpose: The aim of the present in vitro study was to evaluate fatigue resistance of dental fixtures in three different types of fixture/abutment finishing line. Materials and methods: Transmucosal dental implants, with or without ferrulized neck, underwent fatigue tests (static and dynamic load) using the following standard protocol: UNI EN ISO 14801:2016. Two types of loading devices (screw- or cement-retained restoration) were also tested, and fatigue cycle tests were run to failure. Data of static and dynamic load tests were analyzed by proper statistical methods. Results: Following standard protocol for fatigue testing, the ILC type (Implant Level with ferrulized neck and ce…

The effect of orthodontic bracket pad shape on shear bond strength, an in vitro study on human enamel

2018

Background To evaluate the effect of bracket pad shape on shear bond strength (SBS) of orthodontic brackets bonded to human enamel. Material and Methods One hundred and five extracted human maxillary permanent molars were divided into 7 groups of 15 specimens per group (n=15). Each group of teeth was bonded with 6 different shaped WildSmiles® brackets (Star, Heart, Soccer ball, Football, Flower, and Diamond) and GAC® rectangle shaped brackets. Shear debonding force was measured with an Instron universal testing machine using a knife-edged chisel 24 hours after initial bonding. Descriptive statistics (mean, standard deviation, and range) for each bracket pad shape was calculated. Analysis of…

Mechanical properties of provisional dental materials: A systematic review and meta-analysis

2018

Provisional restorations represent an important phase during the rehabilitation process, knowledge of the mechanical properties of the available materials allows us to predict their clinical performance. At present, there is no systematic review, which supports the clinicians' criteria, in the selection of a specific material over another for a particular clinical situation. The purpose of this systematic review and meta-analysis was to assess and compare the mechanical properties of dimethacrylates and monomethacrylates used in fabricating direct provisional restorations, in terms of flexural strength, fracture toughness and hardness. This review followed the PRISMA guidelines. The searche…

Photoelastic analysis of conventional and locking system for treatment of mandibular angle fractures with a single plate

2021

Made available in DSpace on 2021-06-25T10:28:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-04-01 Background: This photoelastic analysis evaluated stress distribution in different osteosynthesis systems, conventional and locking, used for treatment of mandibular angle fractures with a single plate. Material and Methods: Angle fractures were simulated in mandibles made of photoelastic resin. Following Champy’s method, plate osteosynthesis was performed. The samples were divided into five groups: Group 1, non-fractured mandible; Group 2, two screws were installed in each segment using a conventional system; Group 3, two screws were installed in each segment using a locking system; …