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Flexibility is one of the hallmarks of human problem-solving. In everyday life, people adapt to changes in common tasks with little to no additional training. Much of the existing work on flexibility in human problem-solving has focused on how people adapt to tasks in new domains by drawing on solutions from previously learned domains. In real-world tasks, however, humans must generalize across a wide range of within-domain variation. In this work we argue that representational abstraction plays an important role in such within-domain generalization. We then explore the nature of this representational abstraction in realistically complex tasks like video games by demonstrating how the same model-based planning framework produces distinct generalization behaviors under different classes of task representation. Finally, we compare the behavior of agents with these task representations to humans in a series of novel grid-based video game tasks. Our results provide evidence for the claim that within-domain flexibility in humans derives from task representations composed of propositional rules written in terms of objects and relational categories.Reconstruction of upper lip defects can be challenging even for experienced surgeons. In order to restore both function and morphology, the use of quality soft tissue is essential. To this effect, the most common solution is the use of local flaps, or, in extreme situations, a free flap. However, a thin cutaneous upper lip defect may require a different approach. Perforator flaps are versatile and may allow an efficient reconstruction of soft tissue defects using adjacent similar tissues, providing the benefit of "like with like" coverage. We present the case of a 41-year-old female with a 1 × 1.5 cm basal cell carcinoma of the right-side upper lip, initially treated with a full thickness skin graft. Due to poor aesthetic and functional result, a thin submental artery perforator (SMAP) flap reconstruction was performed. Flaps' dimensions were 6 cm long and 4 cm wide and it was based on a perforator arising from the submental artery. compound library inhibitor Dissection was conducted above the platysma muscle, and the SMAP flap was transferred into the defect through a subcutaneous tunnel created below the mandible and posterior to the anterior belly of digastric muscle. The pedicle length of 6.5 cm was adequate for a tension free inset of the flap. Postoperative course was uneventful and the patient was discharged after 2 days. The 4-month follow-up showed a satisfying functional and aesthetic outcome with a concealed donor site scar. This report points out the coverage potential of the thin SMAP flap, which can be successfully used for a harmonious reconstruction in both color and texture of the upper lip.
The aim of this study was to evaluate the effect of use of virtual reality headsets on mothers' anxiety, by distracting their attention, during their child's circumcision procedure.
This was a randomized controlled intervention study.
The study used a pretest and posttest design and was carried out between April 15, 2019, and June 30, 2019, with 60 participants (n = 30 intervention and n = 30 control group). The data were collected using a personal information form, the State Anxiety Inventory and Faces Anxiety Scales. In the study, the participants in the intervention group watched videos through a virtual reality headset.
The socio-demographic characteristics of the intervention group and control group were similar in the pretest, except for the educational level. After the intervention, the intervention group's mean scores on the Faces Anxiety Scale, heart rate and respiration rates were significantly lower than those of the control group, but the difference between the mean State Anxiety Inventory scores was insignificant.
Distraction using videos produced by virtual reality headsets is effective in reducing mothers' moderate level anxiety. It is recommended that further studies should be conducted in different ambulatory surgery procedures.
Distraction using videos produced by virtual reality headsets is effective in reducing mothers' moderate level anxiety. It is recommended that further studies should be conducted in different ambulatory surgery procedures.We investigated how the chemical composition of broiler chicken and cecectomized laying hen excreta is affected by drying in a forced-air drying chamber at low temperatures. Excreta that was immediately frozen after voiding provided the reference values. The excreta were dried in drying chambers for 4 hr, 6 hr, and 12 hr at 23°C or 33°C in the broiler experiment and 19°C or 29°C in the cecectomized laying hen experiment. The total N and inositol phosphate concentrations in the excreta of broiler chickens and cecectomized laying hens were not influenced (p > .050), except for one inositol tetrakisphosphate isomer (p = .026) in broilers. Compared to fresh excreta, drying did not affect the ammonia concentrations in the cecectomized laying hen experiment (p > .050), but the ammonia concentration was lower when dried for 12 hr at 33°C in the broiler experiment (p = .002). Amino acid concentrations in cecectomized laying hen excreta decreased until 4 hr of drying and then increased at both drying temperatures (p less then .001). The results indicate that the applicability of drying poultry excreta at low temperatures in forced-air drying chambers to determine the chemical compound concentrations is trait-dependent. Future studies are necessary to investigate whether these results are also dependent upon the amount of excreta stored in the drying chambers.Tensile-strained Mxene/carbon nanotube (CNT) porous microspheres were developed as an electrocatalyst for the lithium polysulfide (LiPS) redox reaction. The internal stress on the surface results in lattice distortion with expanding Ti-Ti bonds, endowing the Mxene nanosheet with abundant active sites and regulating the d-band center of Ti atoms upshifted closer to the Fermi level, leading to strengthened LiPS adsorbability and accelerated catalytic conversion. The macroporous framework offers uniformed sulfur distribution, potent sulfur immobilization, and large surface area. The composite interwoven by CNT tentacle enhances conductivity and prevents the restacking of Mxene sheets. This combination of tensile strain effect and hierarchical architecture design results in smooth and favorable trapping-diffusion-conversion of LiPS on the interface. The Li-S battery exhibits an initial capacity of 1451 mAh g-1 at 0.2 C, rate capability up to 8 C, and prolonged cycle life.
Homepage: https://www.selleckchem.com/products/bgb-16673.html
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