Color Test Research Articles

Fatigue performance in patients with chronic insomnia.

Insomnia is associated with fatigue and poor driving performance, thus increasing the risk of traffic accidents. This study aimed to evaluate the effect of fatigue on driving in patients with chronic insomnia in a free-flow traffic scenario and car-following scenario, and to investigate the relationships between driving performance, cognitive function, and insomnia. The Trail Making Test (TMT), Stroop Color and Word Test (SCWT), Symbol Digit Modalities Test (SDMT), and Digit Span Test (DST) of 15 participants with mild-to-moderate chronic insomnia and 16 healthy participants were assessed. During the fatigue driving task, drivers completed simulated driving tasks under free-flow traffic and car-following scenarios. The mean speed (MS), mean acceleration (MA), mean lateral position (MLP), and standard deviation of lateral position (SDLP) were measured to assess driving performance. During fatigued tasks, the MA and MLP in the free-driving scenario were higher than those in the car-following scenario (P < 0.01), the SDLP was higher in the insomnia group than in the healthy group (P = 0.02), and the interaction effect was significantly different for MLP between the groups (P = 0.03). MS was negatively correlated with TMT score, SDMT score, and DST score, and positively correlated with time to complete TMT, errors in SCWT, and time to complete SCWT. SDLP was negatively correlated with DST score and positively correlated with time to complete SCWT. Furthermore, the insomnia group had poorer lateral vehicle control ability than the healthy group. The insomnia group had a more impaired driving performance in the free-driving scenario than in the car-following scenario. Drivers with impaired cognitive function exhibited impaired driving performance.

Pengujian Kualitas Air Minum Isi Ulang (Galon) Masyarakat Samata-Gowa Sulawesi Selatan

An assesment of the quality of refill drinking water (gallon water) has been carried out. The purpose of this study is to determine the quality of drinking water consumed by people in Samata-Gowa. There were five water samples taken from five residents' houses. The method used were testing physical and chemical parameters. These two methods consisted of temperature, color, odor, and taste tests; biological test with simple method; chemical test using tea water; pH meter test (acidity); conductivity test; and assay for Pb and Fe metal levels using AAS (Atomic Absorption Spectrophotometer). The results obtained included that the temperature of the five samples was in the range of 23.0 °C-27.0 °C, there were showing no turbidity/colorless, odorless, and bland taste; biological test of each sample showed no precipitate formed; chemical tests on the five samples indicated that there were no change in color; pH and conductivity values ranged from 7.5-8.79 and 65.2-109.3 S/cm, respectively; Fe and Pb levels in each sample were 0.0-0.1 mg/mL and 0.05-0.08 mg/L. Based on these data, the quality of refill drinking water for the people of Gowa-Samata is still suitable for consumption because some of these parameters qualified the standards.

Antibacterial Edible Coating of Ipomea batatas Incorporated with Lactobacillus acidophilus

This study was conducted to analyze the effect of variations concentration of Lactobacillus acidophilus in edible coatings and their antibacterial activity against E. coli using the well diffusion method. This study used an edible coating of Prebiotic from purple sweet potato starch and Lactobacillus acidophilus with dilution variations (10-6, 10-7, 10-8, 10-9) as probiotics. In this study physical properties were tested for edible coatings such as color tests with visual observations, water content by the gravimetric method and viscosity using Viscometer Ostwald. The content of organic acids in edible coating solutions was measured using the HPLC method. Organoleptic test was conducted with taste and color parameters on the A-E scale of 30 respondents. Research results showed edible coating discoloration before and after incorporation from deep purple to brown. The value of water content and viscosity also changed from 62,8% to 71,4% and 569,97 cp to 486,64 cp respectively. The best antibacterial activity of edible coating incorporation with Lactobacillus acidophilus was 263,76 mm2. Organoleptic test on grapes that have been coated with edible coating showed that covered with edible coating contains probiotics (Lactobacillus acidophilus) has no effect on respondents' perception. Lactic acid and acetic acid were exist in edible coating which were incorporated with Lactobacillus acidophilus.

Pengaruh Penambahan Spirulina platensis sebagai Sumber Protein Nabati pada Daging Analog bagi Vegetarian

Spirulina platensis is a vegetable protein source that may improve the quality of food product. The objective of this study was to determine the effect of addition S. platensis on analog meat at concentrations of 0, 10, 20, and 30% and to determine the best concentration of addition S. platensis on meat analogs preferred by the panelists. The processing of meat analogs used steaming method at 100°C for 30 minutes. The researched method applied a completely randomized design. The analog meat samples were analyzed in terms of protein content, protein digestibility, moisture content, texture, color, and hedonic tests. The highest protein content and protein digestibility was at concentrations of S. platensis 30%, 32.24 and 62%. The moisture content obtained at 30% concentration was 54.70%, and the texture at 30% concentration was 1.53 N which resembles the texture of animal meat. Analog meat preferred by panelist was at concentration of 20% which had a texture preference of score of 6.33; aroma 5.00 and taste 6.33 from the average 30 panelist score and had a confidence interval value of 5.56&lt;µ&lt;6.22.

Pengaruh Suhu dan Lama Penyimpanan Terhadap Karakteristik Fisikokimia, Organoleptik dan Mikrobiologis Jruek Drien (Durian Fermentasi Khas Aceh)

Durian is a horticultural product that is easily damaged so it needs to be processed into other products. One of them can be processed into jruek drien. Jruek drien is one of the efforts made to extend the shelf life by means of fermentation. The purpose of this study was to determine the effect of temperature and duration of storage time on the physicochemical, microbiological and organoleptic on jruek drien characteristic. This study used a factorial randomized block design with two factors, namely the storage temperature with two level (room temperature and refrigerator temperature) and storage time with three levels (3, 6, 9 days) with 3 replicatons. The average value of each parameter is pH 4,1, total acid 1,26%, total lactic acid bacteria 7,14 log CFU/g and organoleptic values of color, aroma, taste and texture are 3.24 (neutral), 2.71 (neutral), 2.63 (neutral), 3.08 (neutral) respectively. Temperature and storage time and their interaction greatly affect the pH and total acid in the juicer. Temperature significantly affected the total lactic acid bacteria and organolepti test of color and aroma. The best result in making jruek drien is refrigerator temperature storage with six days of storage.

Increased uncoupling protein 1 levels are associated with attention deficit and hyperactivity disorder in medication-free children

ObjectiveThis study aimed to investigate serum visfatin, irisin, and uncoupling protein 1 (UCP1) levels between children with attention deficit and hyperactivity disorder (ADHD) and healthy controls and to discuss how performance on the Stroop Color Test and Serial Digit Learning Test changes with these adipokines. MethodsA total of 45 medication-free children with ADHD and 43 controls aged 8–12 years were enrolled in this study. The serum levels of visfatin, UCP1, and irisin were measured using enzyme-linked immunosorbent assay kits. ResultsAs a result, in our study, a statistically significant difference was found in UCP1 in the ADHD group compared with the control group, but no significant difference was found in visfatin and irisin levels. An analysis of covariance was also performed for the whole sample, and when controlling for potential confounders, including body mass index, age, and gender, the results did not change. In addition, it was determined that adipokines did not correlate with neuropsychological tests. ConclusionThese findings suggest that UCP1 might be associated with childhood ADHD.

Stress Monitoring Using Wearable Sensors: A Pilot Study and Stress-Predict Dataset

With the recent advancements in the field of wearable technologies, the opportunity to monitor stress continuously using different physiological variables has gained significant interest. The early detection of stress can help improve healthcare and minimizes the negative impact of long-term stress. This paper reports outcomes of a pilot study and associated stress-monitoring dataset, named the "Stress-Predict Dataset", created by collecting physiological signals from healthy subjects using wrist-worn watches with a photoplethysmogram (PPG) sensor. While wearing these watches, 35 healthy volunteers underwent a series of tasks (i.e., Stroop color test, Trier Social Stress Test and Hyperventilation Provocation Test), along with a rest period in-between each task. They also answered questionnaires designed to induce stress levels compatible with daily life. The changes in the blood volume pulse (BVP) and heart rate were recorded by the watch and were labelled as occurring during stress-inducing tasks or a rest period (no stress). Additionally, respiratory rate was estimated using the BVP signal. Statistical models and personalised adaptive reference ranges were used to determine the utility of the proposed stressors and the extracted variables (heart rate and respiratory rate). The analysis showed that the interview session was the most significant stress stimulus, causing a significant variation in heart rate of 27 (77%) participants and respiratory rate of 28 (80%) participants out of 35. The outcomes of this study contribute to the understanding the role of stressors and their association with physiological response and provide a dataset to help develop new wearable solutions for more reliable, valid, and sensitive physio-logical stress monitoring.

ВЛИЯНИЕ ДОФАМИНА НА АДАПТАЦИЮ К УЧЕБНОМУ ПРОЦЕССУ МЛАДШИХ ШКОЛЬНИКОВ

School education is associated with the tension of the regulatory systems: nervous, endocrine, immune. Psychological methods for identifying school maladjustment have a major drawback - they do not reflect the essence of long-standing problems. In order to determine the value of the level of dopamine in the blood serum in primary schoolchildren and its relationship with autonomy, 82 children of grades 1-4 were examined. The diagnosis of school maladjustment was carried out by determining the level of dopamine in the blood serum and using the Luscher color test. It was found that the level of dopamine in children varied in the range of 2.5 - 102.5 pkg / ml and is closely related to the «heteronomy-autonomy» indicator (r = - 0.312 at p = 0.031), which can be used when working with children for predicting the adaptation process.

Early time-restricted eating may favorably impact cognitive acuity in university students: a randomized pilot study

Cognitive acuity is important for academic success. The preliminary efficacy of early time-restricted eating (eTRE) on cognitive acuity was examined in a sample of university students attending a large southwestern university. It was hypothesized that adherence to eTRE would result in improved cognitive acuity as assessed by the Trail Making Tests (i.e., TMT-A and TMT-B) and the Stroop Color and Word Test. Participants were randomized to an intervention group (eTRE) with a daily 6-hour eating window or a control group (CON) with a daily 16-hour eating window; 24 participants initiated the study (13 eTRE and 11 CON). Blood ketones (i.e., β-hydroxybutyrate [BHB]) and brain-derived neurotrophic factor were also assessed. The 8-week intervention was forestalled by COVID-19 laboratory closures beginning in March 2020, and only data obtained at week 0 (baseline) and week 4 were viable for statistical analyses. Study attrition was high (50% for eTRE and 23% for CON). At week 4, there was a 27% and 6% decrease in TMT-B response time for the eTRE and CON groups, respectively (P=.02). TMT-B response time was inversely correlated to plasma BHB among participants (r=-0.633; P=.008). Considering the inverse relationship between TMT-B response time and plasma BHB, these preliminary data suggest that eTRE may improve some aspects of cognitive acuity in this population. Future investigations are needed to confirm these findings and should accommodate individual preferences regarding the initiation time of the eating window while also considering the impact on social influences and exercise engagement.

Executive dysfunction in affective disorders: differences in bipolar affective disorder and depressive episode

Aim. To identify the differences in executive function (inhibitory control, working memory, cognitive flexibility) between patients with bipolar affective disorder and depressive episode.Materials and methods. A total of 72 patients with affective disorders aged 20–40 years were examined. Of them, 30 patients had bipolar affective disorder, a current episode of mild or moderate depression, and 42 patients had a mild, moderate, and severe depressive episode without symptoms of psychosis. The executive function was evaluated using PsyToolkit, a set of software tools for programming psychological experiments. Computerized Go/ No–go tasks (assessment of inhibitory control and psychomotor functions), the Corsi block-tapping test (assessment of visual and spatial working memory capacities), and the Stroop Color and Word Test (assessment of cognitive flexibility) were used.Results. An intergroup comparison of patients revealed that patients with bipolar disorder significantly more often demonstrated false button press in the Go/No–go task (p = 0.043); however, they exhibited a greater working memory capacity in the Corsi block-tapping test (p = 0.049) compared with patients with a depressive episode.Conclusion. Important data were obtained regarding the specifics of executive dysfunction depending on the type of affective disorder. The presented data expand and supplement available information about the cognitive characteristics of patients with bipolar affective disorder and depressive episode, which may be useful in clinical practice and serve a focus of future research.

The Effect of Ca(OH)2 and Sugar on Characteristics of Long Beans Sweet

Long beans are one type of vegetable that is quite popular in the community and has the potential to be developed. Although this type of vegetable gets damaged easily, its shell life is extended by drying which is achieved by adding Ca(OH)2 and soaking it in sucrose for about 12-24 hours. The solution helps to strengthen its texture before processing. This research aims to determine the effect of Ca(OH)2 and sugar treatment on the appearance of sweet long beans. Furthermore, it is designed as factorial experimental research with a completely randomized value consisting of two factors namely Ca(OH)2 (1%, 2%, 3%), and sugar solution (50%, 60%, 70%). The variables observed in sweet of long beans were reducing sugar, total moisture content, ash content, acidity, color test, yield test, and organoleptic test. Conclusively, the treatment using 1% of calcium hydroxide and 50% sugar concentration produced good characteristics with reduced sugar of 0.64 mg/100gr, moisture content of 8.53%, ash content of 2.17%, the acidity of 4.10, brightness level (L*) of 39.96, and a yield of 21.13%. Hence, it gives the best appearance, taste, texture, and overall acceptance on sweet of long beans.

The effect of caffeine consumption on attention performance in female students at the faculty of health sciences

PurposeThere are limited studies on the effects of coffee consumption, which has become part of popular culture and is highly common among young people, on the attention levels of female university students. This paper aims to examine the effects of caffeine consumption given at different doses (0, 100 and 200 mg) to female university students (n = 100) studying at the faculty of health sciences on attention performance with the Stroop Color and Word Test (SCWT).Design/methodology/approachParticipants' test completion time, number of errors and corrections were tested. In addition, the frequencies of weekly coffee consumption were also recorded.FindingsIt was found that consumption of coffee containing 200 mg of caffeine reduced the time to complete the sections of the SCWT test (p < 0.05), as well as the total test completion time (55.81 ± 8.67 s) compared to no coffee consumption (58.25 ± 9.46 s) and coffee consumption with 100-mg caffeine (57.56 ± 8.87 s) (p < 0.05; effect size: 0.268). The effect of caffeine on attention level was induced by 200-mg caffeine consumption, but was unapparent at 100-mg dose. In addition, SCWT completion times were reduced in the student group with more weekly coffee consumption (=3 cups/week) at 200-mg caffeine dose.Originality/valueIn this context, caffeine dose is a factor that should be taken into account in determining the performance of individuals in the SCWT test. It is thought that coffee consumption can increase the concentration of students and have positive effects on academic achievement.

Effects of Accelerated Aging on Color Stability and Surface Roughness of a Biomimetic Composite: An In Vitro Study.

The aim of this in vitro study is to compare the color stability and surface roughness of conventional and self-blending resin composites before and after staining and aging. Three conventional composites (Filtek Z350, IPS Empress Direct, and Estalite Palfique LX5) and one self-blending (Omnichroma) resin composite were used in this study. Sixty discs were prepared and polymerized in a metal mold (n = 15 per group). Samples were then finished and polished by Layan discs. Color testing and roughness testing were measured as a baseline (T0) by a spectrophotometer and profilometry. Samples were then stained with tea for 24 h, water aged for 30 days, and then a second reading (T1) was performed. Finishing and polishing were performed again, and a third reading (T2) was collected. All groups showed significant decrease in all color parameters (L*, a*, and b*); however, after polishing, all groups showed color enhancements matching pre-experiment baseline colors in all color parameters (L*, a*, and b*), except for Estelite Palfique LX5, which showed a significant difference in L relative to the baseline. Furthermore, Estalite Palfique LX5 showed increased roughness after staining compared to the baseline, unlike other groups. No significant differences in color stability were found between self-blending composites and other composite materials. Accelerated aging and staining had minimal effects on the surface roughness of self-blending composite.

The Effect of Pre-treatment of Water Hyacinth (Eichhornia crassipes) and the Use of Cow Dung on Biogas Production

Renewable energy biogas technology, applying the concept of zero waste, can offer an alternative source of energy to deal with environmental problems. The water hyacinth is a type of weed that grows fast and abundantly in rivers. Aside from being considered a pest and waste of no value, it can also be used for biogas production because of its high hemicellulose content. The purpose of this research was to make use of water hyacinths that are abundant in rivers as a source of biogas. The variables used were mixes of water hyacinth, cow dung, and water at variant ratios to be used in the initial treatment. The fermentation process undertaken used a batch system, and the biogas produced was measured every day. The parameters used were the volume of the biogas produced, degree of acidity (pH), C/N ratio, flame color, and composition test using gas chromatography (GC). The results of this study show that the highest biogas volume of 11,233 ml was obtained from the use of water:water hyacinth:cow ratio of 1:0.5:1 and that the lowest biogas volume of 4,370 ml was obtained from the use of the water:water hyacinth:cow dung ratio of 1:1:0. The pH range after the process was complete was between 6.9 and 7.6. The results of the gas chromatography (GC) analysis show that the methane content in the biogas was 80.78% of the area.

CHARACTERIZATION OF FLAKES MADE IN CORN FLOUR (ZEA MAYS) AND PUMPKIN (CUCURBITA MOSHCATA) WITH ADDITION OF SOYBEAN FLOUR (GLICINE MAX)

ABSTRACT&#x0D; This study aims to determine the effect of adding soybean flour (Glicine max) to the chemical, physical, and organoleptic characteristics of flakes from a combination of corn (Zea mays) and pumpkin (Cucurbita moshcata) and to determine the best treatment for flakes produced based on chemical, physical characteristics, and it's organoleptic. The research method used is an experimental method with descriptive data analysis. This study used 5 treatments and 3 replications: A = (addition of 0 grams of soybean flour), B = (addition of 15 grams of soybean flour), C = (addition of 30 grams of soybean flour), D = (addition of 45 grams of soybean flour), and E = (addition of 60 grams of soybean flour). Observations made were chemical analysis in the form of water content, ash content, protein content, fat content, carbohydrate content, crude fiber content, and total amino acids in treatment C, as well as physical tests in the form of water absorption tests, color tests, and organoleptic tests in the form of color, aroma, taste, and texture. The results showed that the addition of soybean flour in the study of corn and pumpkin flour flakes affected water content, ash content, protein content, fat content, carbohydrate content, crude fiber content, water absorption, brightness (color), and preference level based on the color, flavor, taste, and texture of the resulting flakes. The best treatment of flakes produced was treatment C (addition of 30 grams of soybean flour) based on the panelists' preference level with quality characteristics, is: water content (6.43% ± 0.41), ash content (1.76% ± 0.19), protein content (9.78% ± 0.29), fat content (11.25% ± 0.69), carbohydrate content (70.89% ± 0.57), crude fiber content (2.81% ± 0.29), water absorption 368.31% ± 2.49), °Hue (78.57 ± 0.01) and organoleptic values ??(color 4.35; aroma 3.65; taste 4.10; texture 3, 70) with a total value of 9.72% amino acids and the types of amino acids identified are glutamic acids, leucine, aspartic acid, arginine, alanine, phenylalanine, valine, serine, isoleucine, tyrosine, threonine, lysine, histidine, glycine, and methionine. . threonine, lysine, histidine, glycine, and methionine. . threonine, lysine, histidine, glycine, and methionine.&#x0D; &#x0D; Keywords : Flakes, soybean flour, corn flour, pumpkin, characteristics, protein, amino acids.

Study of Characteristics Cooked Salt Traditional in Rabasa Haeran Village of West Malaka District and Weoe Village of Wewiku District of Malaka, Indonesia

Salt is a chemical compound whose main components are sodium chloride (NaCl), water compounds, magnesium ions, calcium ions, and sulfate ions. In salt production generally no equipment is used or high technology is not adepted. The manufacturing process used firewood in a furnace, and the salt that is produced is then dried on a pottery tray made from palm leaves or nyiru panjang which is called socal by the local community before being put into sack packaging. The purpose of this study was to determine the characteristics of cooking salt from Rabasa Haerain village and Weoe village. This study was conducted in June-August 2019. Chemical tests were done at the Technical Implementation Unit of Mathematics and Natural Sciences Laboratory Widya Mandira University for water content and NaCl; and the organoleptic testing for color and aroma tests was done at the Exacta Laboratory of Artha Wacana Christian University. The results showed the average value of saltwater produced traditionally from the two villages in the Malaka District content in Rabasa Haerain village was the highest average of 13.61% while the lowest is 10.55% found in Weoe village. The highest average value of NaCl was 78.45%, namely in Weoe Village and the lowest was 73.93%, of Rabasa Haerain village. The average value for color organoleptic produced by both villages is 100, the lowest average color value is 33.33, in Rabasa Hairaen village and the highest is 66.67, that was found in Weoe village. The average value of aroma organoleptic produced by both villages is 100, the lowest average value is 46.47, that is in Weoe village and the highest was 53.33 in Rabasa Haerain village.

Determination of the physical characteristics of the left-over water from cooked maize and their comparison with those from cooked beans and human urine

The present paper aims to highlight the physical characteristics of the left over water from cooked maize and to compare them with those from fluids from cooked beans, human urine, and water used for the cooking process. This is motivated by the desire to verify if the set of information’s collected during the studies made on fluids from cooked beans can be applied with all the foods undergoing a stage of boiling during their transformation at home. For that purpose, solutions from cooked maize were produced by cooking 2kg of sorted and quickly washed maize seed with 8kg of water with known physical characteristics. The cooking process was done just with water during 6 hours. The samples of solutions were collected, cooled, and store for the various tests. They include: color, mass, volumetric mass, density, settling, and infiltrometric tests. Apart from the infiltrometric tests which took place on the field, the different other measurements were made in the laboratory. The color of the water used for the cooking process is translucent. Concerning solutions from the cooking, those from cooked beans are brown while those from cooked maize are whitish to yellowish. Fluids from cooked beans contained greater quantities of flakes compared to those from cooked maize. From the water used for the cooking processes to the end of the different cooking fluids, the mass, the volumetric mass, and the density increase. The infiltration tests made show that the infiltration rate of the water from cooked beans is low compared to that of the water from cooked maize, and very low compared to that of human urine and water used for the cooking processes respectively. The total infiltration of solution of the end of cooking the bean and the maize reveals on the infiltration surface the presence of a film of a material bearing molds, generated by the progressive settling of this solution. Odor risen from fluids from cooked beans is stronger compared to that from fluids from cooked maize. The repulsive character of the odor from human urine is effective; however, the subjectivity of that character cannot really help to identify which among odor from liquid from cooked bean and human urine is more repulsive. At rest, one can find formed at the surface of the water from cooked maize the presence of a film. Settling occurs at rest within the fluids from cooked maize and cooked beans at rest. Flakes from cooked beans and cooked maize fluids both attract flies; but only those from cooked maize attract also mice. The correlations established between the different parameters followed up here are highly positive. But in detail, the influence of an under laid parameter, known here as temperature, has been identified as being the responsible of the questioned behavior of the parameters taken in peers in the case of correlation studies made.

The effects of resin infiltration on demineralized root surface: an experimental study.

The objective of this experimental invitro study was to investigate the effects of resin infiltration (RI) on surface roughness, microhardness, color and surface characteristics of artificially demineralized root surfaces. Forty-two root specimens prepared from freshly extracted intact human upper incisors were subjected to surface roughness, microhardness, and color tests. Profilometer was used to measure surface roughness and Vicker's Hardness tester was used to measure the changes in microhardness. The color measurements were performed by a spectrophotometer using the CIELAB parameters. Following measurements, specimens were divided into 3 groups (n=14): G1: intact root surfaces, G2: demineralized root surfaces and G3: Resin infiltrated root surfaces (Icon, DMG) following demineralization. Surface roughness, microhardness and color measurements were repeated in G2 and G3 after demineralization and RI. One specimen from each group was examined by SEM. Data were analyzed statistically (p<0.05). Application of RI to artificially demineralized root surfaces significantly decreased the surface roughness (p<0.001) and increased the microhardness (p=0.023). RI also affected the color of demineralized root surfaces. SEM examinations revealed that the porosities on demineralized root surfaces seemed to be sealed after RI. RI affected the surface roughness, microhardness, color and surface appearance of artificially demineralized root surfaces.

Electroencephalogram Signal Analysis Using Wavelet Transform and Support Vector Machine for Human Stress Recognition

The human stress is a mental condition that can abnormally change the brain electrical activity, thus, electroencephalogram (EEG) signal measurements can detect and quantify those brain cognitive changes that are differentiated from the normal state. In this research work, EEG signals are used for the analysis and detection of the level of human stress. The EEG signals are collected from the human being called it as a subject under test. The stroop colour test has been used as a stressor to induce stress in the subjects under test. The various levels of stress in the stroop test have been verified to low, moderate, and high levels of stress in the subject. The input signals are then decomposed into the number of a narrowband signal using wavelet transform. During the experimentation important features are also extracted from EEG signal to identify normal and abnormal signals. The SVM classifier has been used in our research work for the classification of stress and non stress signals. The performance of the proposed system using SVM is comparatively good in dependent and independent systems. The highest accuracy achieved in this study is 90% (Standard Deviation = 0.015) for user-dependent systems and 72.3% (SD = 0.08) for user-independent systems. The results show that the proposed system is reliable for detecting stress and normal levels respectively.

FLAME RETARDANT AND ANTIMICROBIAL PAPER COATINGS WITH ROSEMARY OIL AND BARIUM BORATE

Adding an antimicrobial effect to the papers used in the cardboard packaging industry can extend the life of the packed product. Paper, due to its structure, has the property of being ignited quickly. Enhancing the properties of paper, the combination of antimicrobial protection, low flammability and good printability to the paper will expand its usage area in the packaging industry. In this study, barium borate was synthesized in order to impart low flammability to paper. Different combinations of rosemary oil and barium borate were mixed with binding starch in varying amounts, and formulations were prepared. With these mixtures, 80 g/m2 paper was coated using a laboratory-type paper coating machine. The antimicrobial properties of the paper were investigated by performing the disk diffusion antimicrobial test against E. coli and S. aureus bacteria. The Limiting Oxygen Index (LOI) test was performed to determine the low flammability of the paper. Color, gloss, contact angle and surface energy tests were performed for the printability properties of the paper. As a result, the coatings containing formulations of barium borate and rosemary oil, applied to the paper surface, succeeded in imparting antimicrobial and low flammability properties to the papers, while also improving the printability features.