scholarly journals Evaluation of the quality of surface finish of messassa wood for three types of varnishes.

2020 ◽  
Vol 8 (2) ◽  
pp. 122-130
Author(s):  
Narciso Fernando Bila ◽  
Rosilani Trianoski ◽  
Andrade Fernando Egas ◽  
Setsuo Iwakiri ◽  
Marcio Pereira da Rocha
Keyword(s):  
Surface Finish ◽  
Solid Wood ◽  
Color Variation ◽  
Technical Standards ◽  
Coating Performance ◽  
Impact Deformation ◽  
Water Based ◽  
Brachystegia Spiciformis ◽  
The Impact

The aim of this study was to evaluate the performance of the messassa wood Brachystegia spiciformis and Julbernardia globiflora for three types of finishing products for use in the furniture and frames industries. Coating performance was assessed by adhesion strength, impact deformation resistance, abrasiveness, gloss and overall color variation tests based on technical standards. Copal painting application was higher for gloss, adhesion and lower abrasiveness compared to water based and polyurethane. The impact deformation was higher for polyurethane than water-based and copal for both species. The darkening of wood for Brachystegia spiciformis and a slight lightening of wood by Julbernardia globiflora characterize the overall color variation after application of the coating products. According to these results, the varnishes can be used to add value to the messassa wood as a finish in solid wood furniture and frames.

scholarly journals Machining Ti-6Al-4V Alloy Using Nano-Cutting Fluids: Investigation and Analysis

2021 ◽  
Vol 5 (2) ◽  
pp. 42
Author(s):  
Abdelkrem Eltaggaz ◽  
Ibrahim Nouzil ◽  
Ibrahim Deiab
Keyword(s):  
Surface Finish ◽  
Minimum Quantity Lubrication ◽  
Weight Fraction ◽  
Contact Length ◽  
Al2o3 Nanoparticles ◽  
Compressive Stresses ◽  
Cutting Zone ◽  
The Impact ◽  
Cooling And Lubrication

Minimum Quantity Lubrication nanofluid (MQL-nanofluid) is a viable sustainable alternative to conventional flood cooling and provides very good cooling and lubrication in the machining of difficult to cut materials such as titanium and Inconel. The cutting action provides very difficult conditions for the coolant to access the cutting zone and the level of difficulty increases with higher cutting speeds. Furthermore, high compressive stresses, strain hardening and high chemical activity results in the formation of a ‘seizure zone’ at the tool-chip interface. In this work, the impact of MQL-nanofluid at the seizure zone and the corresponding effects on tool wear, surface finish, and power consumption during machining of Ti-6Al-4V was investigated. Aluminum Oxide (Al2O3) nanoparticles were selected to use as nano-additives at different weight fraction concentrations (0, 2, and 4 wt.%). It was observed that under pure MQL strategy there was significant material adhesion on the rake face of the tool while the adhesion was reduced in the presence of MQL-nanofluid at the tool-chip interface, thus indicating a reduction in the tool chip contact length (TCCL) and reduced seizure effect. Furthermore, the flank wear varied from 0.162 to 0.561 mm and the average surface roughness (Ra) varied from 0.512 to 2.81 µm. The results indicate that the nanoparticle concentration and the reduction in the seizure zone positively influence the tool life and quality of surface finish.

Effects of Water-Based Exercise Training on the Cognitive Function and Quality of Life of Healthy Adult Women

2017 ◽  
Vol 14 (11) ◽  
pp. 899-904 ◽  
Author(s):  
Carlos Ayán ◽  
Paulo Carvalho ◽  
Silvia Varela ◽  
José María Cancela
Keyword(s):  
Quality Of Life ◽  
Mental Health ◽  
Cognitive Function ◽  
Exercise Training ◽  
Healthy Adult ◽  
Adult Women ◽  
Water Based ◽  
Group A ◽  
The Impact

Background: Research regarding the impact of aquatic exercise on cognition is scarce. This study aimed at identifying the effects of water-based exercise training on the cognitive function and quality of life of healthy adult women. Methods: Fifty-one healthy women [mean age: 46.5 (12.3) y] were assigned to group A or B and followed a water-based exercise program for 6 months. During the first 3 months, the sessions performed by group A were focused on stimulating cognitive function. For the next 3 months, the sessions were mainly aimed at improving physical fitness. Participants in group B followed the same program in reverse order. The trail making and symbol digit modality tests were used to assess the impact of the program on cognition. The effects of the intervention on the participants’ physical and mental health were measured by means of the medical outcomes study 36-item short-form health survey. Results: Once the intervention ended, significant improvements were observed in the participants’ cognitive function and mental health domain, regardless of the group in which they were initially included. Conclusion: Water-based exercise is a training modality capable of enhancing cognitive function and quality of life through improvements in mental health in healthy adult women.

The effect of mechanical treatment of beech wood surface on quality of surface finish

2019 ◽  
Vol 106 ◽  
pp. 99-106
Author(s):  
GABRIELA SLABEJOVÁ ◽  
MÁRIA ŠMIDRIAKOVÁ
Keyword(s):  
Film Thickness ◽  
Surface Finish ◽  
Wood Surface ◽  
Mechanical Treatment ◽  
Beech Wood ◽  
Impact Resistance ◽  
Coating Materials ◽  
Surface Finishes ◽  
The Impact

The effect of mechanical treatment of beech wood surface on quality of surface finish. The paper deals with the quality of three surface finishes intended into interior. Three types of coating materials were tested (polyurethane, waterborne, wax). Each type of the surface finish was created on beech wood surface in three various coating thicknesses. The coating thicknesses differed in number of coatings of the coating material. The surface finishes were evaluated according to the impact resistance and the resistance to abrasion. The polyurethane surface finish showed the lowest resistance to abrasion. If the film thickness was increasing, the resistance to abrasion was decreasing. The greatest differences in the resistance to abrasion, depending on the wood surface treatment, were found on the wax surface finish. In general, the waterborne surface finish showed the best resistance to abrasion. Pressing the wood surface before finishing increased the impact resistance of all three surface finishes. The damage of the surfaces was only of grade 2 (No cracks on the surface and the intrusion was only slightly visible). The lowest impact resistance of the surface finishes was found on grinded wood surface; the damage was graded as 4 (Visible large cracks at the intrusion). At the drop height of 400 mm, the effect of the film thickness on the impact resistance was no longer present on all differently mechanically treated surfaces.

Quality of surface finish on furniture doors of MDF board

2019 ◽  
Vol 105 ◽  
pp. 102-106
Author(s):  
GABRIELA SLABEJOVÁ ◽  
MÁRIA ŠMIDRIAKOVÁ ◽  
IVAN VOZAF
Keyword(s):  
Mechanical Properties ◽  
Surface Finish ◽  
Impact Resistance ◽  
Physical And Mechanical Properties ◽  
Coating Material ◽  
Film Hardness ◽  
The Impact

Quality of Surface Finish on Furniture Doors of MDF Board. The paper deals with the assessment of the quality of furniture door surface. The properties were tested on the following types of the surface finish on MDF doors: PVC foil (glossy and matt), acrylic foil, and PUR pigmented coating material. The following physical and mechanical properties of the surfaces were assessed: the film hardness, the impact resistance, and the resistance against scuffing. The polyurethane surface finish and the glossy PVC foil achieved the same film hardness. The impact resistance of the polyurethane finish was significantly lower than the impact resistance of the PVC foils and the acrylic foil. The resistance against scuffing was lower for the polyurethane finish if compared to the foiled surfaces.

Surface Finish Techniques for FDM Parts

2015 ◽  
Vol 818 ◽  
pp. 45-48 ◽  
Author(s):  
Ivan Gajdoš ◽  
Emil Spišák ◽  
Luboš Kaščák ◽  
Volodymyr Krasinskyi
Keyword(s):  
Surface Finish ◽  
Fused Deposition Modeling ◽  
Engineering Industry ◽  
Surface Finishing ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Pre Treatment ◽  
Manufacturing Technologies ◽  
The Impact

Additive manufacturing technologies decrease production time and costs in engineering industry but also in other industries. Parts produced with Fused Deposition Modeling (FDM) have typical low surface finish quality. This paper is aimed on research of surface finishing technologies applicable to improve the quality of FDM prototypes surface finish. Pretreated samples were blasted with sodium bicarbonate and glass beads. The values of Raand Rzwere measured on the samples and compared the impact of selected pre-treatment, blasting medium and blasting conditions on surface finish quality of FDM prototypes.

Investigating the Properties of Modified Drilling Mud with Barite/Polyacrylamide Nanocomposite

2021 ◽  
pp. 1-7
Author(s):  
Pouria Roodbari ◽  
Samad Sabbaghi
Keyword(s):  
Fluid Loss ◽  
Solution Polymerization ◽  
Drilling Mud ◽  
Drilling Operation ◽  
Water Based ◽  
Drilling Operations ◽  
The Impact ◽  
Viscosity Fluid ◽  
Polymerization Method

Summary Drilling mud plays a significant role in the drilling operation because it is influential in the quality of the drilled well and the efficiency of the drilling operation. In this paper, we aim to identify the methods to improve the effectiveness of drilling operations by analyzing and evaluating the impact of adding polyacrylamide and a barite/polyacrylamide nanocomposite, synthesized through the solution polymerization method, on the properties of drilling mud. The study added the synthesized nanocomposite to the water-based drilling mud (350 cm3 water with 10 g bentonite) and examined the properties of the drilling mud, including viscosity, fluid loss, and mudcake thickness. Overall, the results indicated that the addition of the synthesized nanocomposite caused a decrease in fluid loss and the thickness of the mudcake, while it increased the drilling mud’s viscosity.

Self-Compassion and Quality of Life in Adults Who Stutter

2020 ◽  
Vol 29 (4) ◽  
pp. 2097-2108
Author(s):  
Robyn L. Croft ◽  
Courtney T. Byrd
Keyword(s):  
Quality Of Life ◽  
Social Connectedness ◽  
The Self ◽  
Future Research ◽  
Self Compassion ◽  
Adults Who Stutter ◽  
And Gender ◽  
Relationship Of ◽  
The Impact

Purpose The purpose of this study was to identify levels of self-compassion in adults who do and do not stutter and to determine whether self-compassion predicts the impact of stuttering on quality of life in adults who stutter. Method Participants included 140 adults who do and do not stutter matched for age and gender. All participants completed the Self-Compassion Scale. Adults who stutter also completed the Overall Assessment of the Speaker's Experience of Stuttering. Data were analyzed for self-compassion differences between and within adults who do and do not stutter and to predict self-compassion on quality of life in adults who stutter. Results Adults who do and do not stutter exhibited no significant differences in total self-compassion, regardless of participant gender. A simple linear regression of the total self-compassion score and total Overall Assessment of the Speaker's Experience of Stuttering score showed a significant, negative linear relationship of self-compassion predicting the impact of stuttering on quality of life. Conclusions Data suggest that higher levels of self-kindness, mindfulness, and social connectedness (i.e., self-compassion) are related to reduced negative reactions to stuttering, an increased participation in daily communication situations, and an improved overall quality of life. Future research should replicate current findings and identify moderators of the self-compassion–quality of life relationship.

Surgery for Lung Cancer and the Consequences for the Swallow

2016 ◽  
Vol 1 (13) ◽  
pp. 162-168
Author(s):  
Pippa Hales ◽  
Corinne Mossey-Gaston
Keyword(s):  
Lung Cancer ◽  
Treatment Options ◽  
Vocal Cord Palsy ◽  
Subsequent Treatment ◽  
Physiological Reserve ◽  
Palliative Phase ◽  
And Function ◽  
The Impact ◽  
Swallow Function

Lung cancer is one of the most commonly diagnosed cancers across Northern America and Europe. Treatment options offered are dependent on the type of cancer, the location of the tumor, the staging, and the overall health of the person. When surgery for lung cancer is offered, difficulty swallowing is a potential complication that can have several influencing factors. Surgical interaction with the recurrent laryngeal nerve (RLN) can lead to unilateral vocal cord palsy, altering swallow function and safety. Understanding whether the RLN has been preserved, damaged, or sacrificed is integral to understanding the effect on the swallow and the subsequent treatment options available. There is also the risk of post-surgical reduction of physiological reserve, which can reduce the strength and function of the swallow in addition to any surgery specific complications. As lung cancer has a limited prognosis, the clinician must also factor in the palliative phase, as this can further increase the burden of an already compromised swallow. By understanding the surgery and the implications this may have for the swallow, there is the potential to reduce the impact of post-surgical complications and so improve quality of life (QOL) for people with lung cancer.

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