Analysis Of F-test Research Articles

Interference of Conyza sumatrensis on grain yield of soybean cultivars

Sumatran fleabane (Conyza sumatrensis) weed can be found in several different agricultural environments and impacts different crops, such as soybean and maize. This weed may have a substantial impact on soybean yield. The aim was to evaluate the interference of C. sumatrensis on the grain yield of soybean cultivars. Soybean cultivars were used with late or early maturity, under 0, 1, 2, 3, 4, 6, 8, and 10 plants m-2 of C. sumatrensis. The four trials, composed of the two cultivars in each of the growing seasons, were analyzed separately. Because differences were found to be significant using the F-test in the comparison between trials (P≤0.05). The yield was subjected to analysis of variance and F-test. A nonlinear, rectangular hyperbolic regression model was fitted. For the early maturity cultivar, infestation levels of 17.1 and 17 of plants m-2 in the 2016–2018 and 2017–2018 growing seasons, respectively, were required to cause a 50% yield loss. For late-maturity cultivars, the values were 6.3 and 7.0 in the 2016–2017 and 2017–2018 growing seasons, respectively. The yield reduction observed for the late-maturity cultivar was 12.54 and 13.72% per plant of C. sumatrensis, in the 2016–2017 and 2017–2018 growing seasons, respectively. The early maturity cultivar showed a reduction of 9.35 and 10.77% per plant, in the 2016-2017 and 2017–2018 growing seasons, respectively. Conyza sumatrensis that cannot be tolerated in soybean, because a single plant per m2 has great potential for reducing yield, from 9.35 to 13.72%.

KORELASI RADIASI DAN LAMA PENYINARAN MATAHARI TERHADAP PERTUMBUHAN DAN PRODUKSITANAMAN SORGUM (Sorghum bicolor L. Moench)

This study aims to investigate the T-test, F-test, and correlation test of radiation and duration of sunlight exposure on the growth and production of sorghum plants. The research was conducted at the Meteorology, Climatology, and Geophysics Agency (BMKG) Climate Station in Indrapuri, Aceh Besar, from March to June 2023.The study employed Multiple Linear Regression Analysis, T-test, F-test, Correlation Coefficient, and Determination Coefficient. The results indicate that radiation and duration of sunlight exposure significantly affect plant height, number of leaves, and sorghum production. Regression analysis also shows that radiation and duration of sunlight exposure have a significant impact on all parameters studied. The T-test reveals that radiation does not have a partial effect on plant height and the number of leaves, but it does have a partial effect on weight and wet weight. On the other hand, the duration of sunlight exposure has a partial effect on plant height and the number of leaves, but it does not have a partial effect on the wet weight of samples and the wet weight. The simultaneous F-test analysis shows that radiation and duration of sunlight exposure have a simultaneous effect on plant height. Correlation analysis shows that plant height, number of leaves, wet weight per sample, and wet weight per plot are related.

PENGARUH KUALITAS SUMBER DAYA MANUSIA, PROFESIONALISME KERJA DAN WORK LIFE BALANCE TERHADAP KINERJA KARYAWAN PERUMDA AIR MINUM TIRTA HITA BULELENG

Human resources are still a concern for organizational companies to survive. Having quality resources when we are able to be given responsibility and exercise authority, however,a number of problems were found related to the quality of HumanResources Quality,Professionalismof Work, Work Life Balance, Employee’s.Performance atPerumda Air MinumTirta Hita Buleleng, sothe examiner was interested inexamining the effect of Human ResourcesQuality, Professionalism ofWork and Work Life Balance,onemployee’s performance at PerumdaAir Minum Tirta Hita Buleleng. This test has an achievement to find outhow the influence of Human Resources Quality, Professionalism of Work, along with worklifebalance on the performanceof Perumda Air Minum TirtaHita Bulelengemployees. Thedata collection technique usedin this test is aquestionnaire to analyze the data quantitatively using,coefficient ofdetermination, multiple linear regressionanalysis, f-test analysis, t hypothesis test.The sample in this test is the central employees of Perumda Air Minum Tirta Hita Buleleng with a total of 136 respondents. Thedata analysis used inthis study is multiplelinear regressionanalysis, classical assumptiontest, f-test analysis and hypothesis t analysis. Based onthe results in this test, it can beconcluded thatthe quality of humanresources, workprofessionalism, andwork lifebalance have a significantpositive effect onemployee’sperformance.

Patient-Level Value Analysis in Total Hip Arthroplasty: Optimizing the Value of Care Delivery.

Value is defined as the ratio of patient outcomes to the cost of care. One method to assess value is through patient-level value analysis (PLVA). To our knowledge, this tool has not previously been implemented in the setting of total hip arthroplasty (THA). The purposes of this study were to perform PLVA for a 1-year episode of care among patients undergoing primary THA and to identify characteristics that affect value in a metropolitan health-care system. The patient-reported outcome (PRO) measure database of the institution was queried for all primary THAs from 2018 to 2019. The PRO measure that was utilized was the Hip disability and Osteoarthritis Outcome Score, Joint Replacement (HOOS-JR). Cost was evaluated with use of time-driven activity-based costing (TDABC) for a 1-year episode of care (consisting of the day of surgery, inpatient stay, discharge facility, postoperative appointments, and physical therapy). The primary outcome was the 1-year value quotient, or the ratio of the 1-year change in HOOS-JR to the cost of the episode of care (VHOOS). The value quotient was compared among all included patients and evaluated for variables that may affect the overall value of the episode of care. In total, 480 patients were included in the analysis. The mean improvement in the HOOS-JR was +34.9 ± 16.1 (95% confidence interval [CI]: 33.5, 36.3). The mean cost was $13,835 ± $3,471 (95% CI: $13,524, $14,146). The largest contributor to cost was implants (39.0%), followed by post-recovery care (i.e., inpatient stay and specialized nursing facilities; 24.1%). Change in the HOOS-JR was poorly correlated with the cost of care (r = -0.06; p = 0.19). THAs performed at an ambulatory surgery center (ASC) with discharge to home demonstrated higher value (VHOOS = 0.42) than THAs performed at a hospital with discharge to a rehabilitation facility (VHOOS = 0.15; analysis of variance F-test, p < 0.01). Our study found that PROs did not correlate with costs in the setting of primary THA. Implants were the largest cost driver. Surgical setting (an ASC versus a hospital) and discharge destination influenced value as well. PLVA is a value measurement tool that can be utilized to optimize components of the care delivery pathway. Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

COMPARATIVE STUDY OF DIFFERENT CUTTING FLUIDS ON TOOL-WORK INTERFACE TEMPERATURE DURING TURNING OPERATION ON 6061 ALUMINUM ALLOY

This study investigated the impact of tool-work interface temperature during the turning process of a cylindrical workpiece made of 6061 aluminum alloy. The experiment utilized four different cutting fluids: palm oil-based cutting fluid (POBCF), neem seed oil-based cutting fluid (NOBCF), orange seed oil-based cutting fluid (OSOBCF), and mineral oil-based cutting fluid (MOBCF) using uncoated carbide cutting tool of grade H13A. Various machining parameters were considered, including spindle speed (180, 250, 355, 500 rpm), feed rate (0.105, 0.116, 1.4, 1.6 mm/rev), and depth of cut (0.5, 1.0, 1.5, 2.0 mm). The experimental design followed the Taguchi specified L16 (43) orthogonal array and was conducted on a Lathe Machine XL 400. To measure the tool-work interface temperature, an infrared thermometer (KM 690) was employed during the aluminum alloy machining process. Subsequently, a mathematical model for the tool-work interface temperature values was developed through regression analysis using Minitab 16. The significance of the chosen machining parameters and their respective levels on the tool-work interface temperature was determined using analysis of variance (ANOVA) and F-test. The findings indicated that machining under orange seed oil-based cutting fluid (OSOBCF) conditions resulted in a 9.02%, 16.4%, and 21.7% lower temperature at the tool-work interface compared to palm oil-based cutting fluid (POBCF), neem seed oil-based cutting fluid (NOBCF), and conventional oil-based cutting fluid (MOBCF), respectively. This suggests a potential for producing higher-quality products under orange seed oil cutting fluid conditions compared to other wet conditions.

Concept of Implant Placement in Deficient Posterior Maxillary Bone by Osseodensification Technique

Aim: The aim of this study was to analyze new bone formed after indirect sinus lift using Densah bur at 6 months and 1 year postoperatively. Materials and Methods: This study is a randomized control trial. Fifteen patients with edentulous deficient posterior maxilla were recruited for the surgery by osseodensification (OD) technique. This study enrolled healthy adults aged 18 and older, with good oral health, who required one or more dental implants in the posterior maxilla to support fixed rehabilitations such as single crowns or fixed partial prostheses. Inclusion criteria comprised individuals with sufficient buccopalatal width, a minimum of 3.5 mm residual bone height at the intended edentulous area, and an absence of diagnosed bone diseases or medications known to impact bone metabolism. Periotest was used for analysis. Results: At preoperative, residual bone height was only 5.65 (1.87) mm which increased to 12.13 (0.87) mm at postoperative immediate levels, and remained stable at 11.97 (0.85) mm at 6 months postoperative and at 11.4 (0.8) mm at 1-year postoperative. On overall comparison of bone measurements at different time intervals using repeated measures analysis of variance F-test, there was found to be highly statistically significant (P &lt; 0.001) difference among overall comparison in relation to bone height. Conclusion: For the treatment of low-density edentulous areas, especially in individuals with osteoporosis, the OD technique involving the reversal of drilling direction is a reliable and straightforward method that does not necessitate specialized equipment.

Pengaruh Disiplin Kerja, Kesehatan Kerja, dan Keselamatan Kerja Terhadap Produktivitas Karyawan PT. Machine Control &amp; Automation

The increasingly modern business world like today is very much about its development, foreign and domestic competition makes companies want to continue to increase productivity. This study aims to determine the influence of work discipline, occupational health, and occupational safety on employee work productivity at PT. Machine Control &amp; Automation. This research is a replication study using a quantitative approach method. Sampling was taken using purposive sampling with a total sample of 84 employees. Data was obtained from the results of distributing questionnaires to respondents. This research analysis uses multiple linear regression analysis with the results of the analysis showing that work discipline, work health and work safety have an influence on employee productivity as proven by the t-test which shows tcount &gt; ttable. The results of the F-test analysis show that work discipline, work health and work safety have a simultaneous effect on work productivity. This can be proven from the results of the f test by paying attention to the value of Fcount &gt; Ftable. And the significance value is &lt;0.05. The limitations of this research are employee productivity which is influenced by work discipline, work health and work safety. Suggestions for further research are expected to retest based on dimensions and indicators other than those examined in this research

A Novel Flow Injection Method with Chemiluminescence Detection for the Determination of Carmoisine in Gelatin Desserts.

Carmoisine dye, a red azo food colorant commonly utilized to impart a red color to synthetic food products, is the subject of this study. Here, we present a novel reversed flow injection analysis with a chemiluminescence detection (FIA-CL) method employing a newly developed homemade flow cell to determine carmoisine dye. This developed method is based on the inhibition effect of the dye on the chemiluminescence light (CL) emission generated from a luminal-hypochlorite system, whereby the reduction in CL intensity correlates directly with the concentration of carmoisine dye. Investigations into various analytical parameters were conducted to enhance method efficiency and applicability. A linear calibration graph of 4.0 to 100.0µg mL-1 was established (R² = 0.9993), with a detection limit of LOD = 2.93µg mL-1. Subsequent application of the proposed method to analyze gelatine dessert samples yielded results in reasonable agreement with those obtained using the reported HPLC method, as evidenced by student t-test and F-test analyses.

The Effect of High Impact Teaching Practices on Student Comprehension

Despite a large number of published studies on high-impact teaching practices (HIP), there is little consistency in design or measurable outcomes and few quantitative studies, which leads to a lack of information on how specific HIPs improve learning outcomes. Therefore, the research questions for this study are a) does the same HIP have similar results across sections and, b) does a HIP in one section result in a different learning outcome than in another section that does not have a HIP? The hypothesis for the first question is there is no difference in student comprehension between sections when all sections have the same HIP. The hypothesis for the second question is there will be a difference in student comprehension between sections, with students exhibiting greater comprehension in the section with the HIP. For several years we have been using a variety of HIPs in our classes without measuring their impact. This is a preliminary study designed to measure the impact of HIPs on two different sections of Human Anatomy and Physiology II, taught by the same professor. The design of the study is as follows: [Formula: see text] We will analyze our data for two attributes, average and variability of pre-tests and post-tests. For the first attribute, we will study mean distribution. T-test analysis of the mean will be used to measure differences between sections for the pre-test and each post-test. Similarly, T-test analysis of the means will be used within each section to analyze differences between the pre-test and each post-test. For the second attribute, we will use F-test analysis of variance. Tests of normality of grade distribution for three assignments or tests in two sections of a typical biology class were conducted. Our analyses showed that all skewness and kurtosis values were between -2 to 2, and the median and mean were very close. Thus, it is reasonable to assume that the data are from normally distributed populations. Therefore, the approach we have outlined to measure HIP impact is appropriate for our classes. The results from this preliminary study will be used to identify specific HIPs that result in higher learning outcomes and will assist us in refining our pedagogical approach. Funding was provided by Lincoln University's Offce of Title III; Award #P031E200019-HBCU Title III, Part F Program. This is the full abstract presented at the American Physiology Summit 2024 meeting and is only available in HTML format. There are no additional versions or additional content available for this abstract. Physiology was not involved in the peer review process.

The Influence of Work Motivation and Work Discipline on Employee Performance at The Depok City Civil Service and Human Resources Development Agency (BKPSDM)

This study aims to uncover the role of work motivation and work discipline in shaping employee performance at the Depok City Personnel and Human Resources Development Agency (BKPSDM), based on various cases related to employee performance. Many cases exhibit symptoms of imbalance. Researchers use Douglas McGregor's theory to describe motivation and utilize both primary and secondary information. The study employs a quantitative data collection approach, analyzing it to achieve an in-depth understanding of the phenomenon by distributing closed questionnaires to 56 respondents. Prior to analysis, the validity and reliability of all instruments are tested. The verified and reliable information is then further analyzed using the t-test correlation test. The objective of this research is to comprehend the influence of work motivation and work discipline on individual employees. The primary objective is to assess the impact of work motivation and overall work discipline on employee performance through F-test analysis. There is a significant correlation coefficient of 0.419 between work motivation and employee performance. Similarly, there is a significant correlation coefficient of 0.324 indicating a strong influence of work discipline on employee performance. Keywords: employee performance, work motivation, work discipline

The Impact of Economic Growth of Middle-Income on Individuals Investment and Wealth Creation in Ghana

The fundamental objective of economic growth is to have a lasting, positive, and self-sustaining impact on a nation's people. The primary aim of economic growth is to establish a long-lasting, positive, and self-sustaining impact on a nation's populace. When a government contemplates implementing a financial program, it is crucial to prioritize the welfare of its citizens. This study delves into how Ghana's economic growth has affected individual investment and wealth creation. The research is exploratory and employs a mixed-methods approach to empirically investigate the association between Economic Growth and the Middle Income of Individuals in Ghana. To assess the relationship between Economic Growth variables and the Middle Income of Individual Ghanaians, statistical analysis of content analysis of findings was employed using a quantitative research approach. Primary data was collected through semi-structured interviews and follow-up interviews in select districts of Ghana. Additionally, the researcher employed a longitudinal study approach, gathering data on 25 years of macroeconomic variables in Ghana from 1990 to 2015 from the World Bank database. The data was analyzed using statistical packages such as SPSS, MINITAB, and others. The analysis was based on the findings obtained from descriptive statistics and panel regression such as analysis of variance (ANOVA), chi-square, F-test, t-test, co-integration test, and other relevant statistical tests. The results showed that many Ghanaians invested some level of their income into various financial products, creating wealth among individual Ghanaians.

PENGARUH BRAND IMAGE, ONLINE CUSTOMER REVIEW DAN ONLINE CUSTOMER RATING TERHADAP KEPERCAYAAN KONSUMEN PADA SHOPEE DI DESA TEGAL TUGUKECAMATAN GIANYAR

The study's objectives were to ascertain if brand image, online customer reviews, and online customer ratings had a concurrent, partial, and substantial impact on consumer trust in Shopee in Tegal Tugu Village, Gianyar District. By establishing criteria, such as customers who reside in the Tegal Tugu Village area of Gianyar District, have the Shopee application, have transacted using Shopee more than once, and are above the age of 17, the purposive sampling approach was used to calculate the number of samples from 97 consumers. The traditional assumption test, multiple linear regression analysis, determination analysis, F-test analysis, and t-test analysis were all used to examine the data. The findings demonstrated that there was either a simultaneous or partial positive and substantial impact.

Analysis of Organizational Culture and Job Satisfaction on Employee Performance

This study aims to determine the influence of organizational culture and job satisfaction on the performance of employees of the Mamasa Regency Food Security Office, West Sulawesi. The type of research approach used in this study is quantitative research, namely research where data collection is in the form of numbers and analysis using statistics. The population in this study is State Civil Apparatus Employees at the Mamasa Regency Food Security Office, the analysis methods used are multiple regression analysis, t-test analysis, f-test analysis, correlation analysis and determination analysis. The results of the study showed that (i) organizational culture partially had a positive and significant effect on employee performance, (ii) job satisfaction partially had a positive and significant effect on employee performance, and (iii) organizational culture and job satisfaction simultaneously affected employee performance in employees of the Mamasa Regency Food Security Office.

Spraying performance and deposition characteristics of an improved air-assisted nozzle with induction charging.

Electrostatic spraying technology can improve the efficiency of pesticide deposition on the surface of leaves and reduce the environmental pollution caused by pesticide drift, which has an important prospect in agricultural pesticide application. To improve the deposition and penetration of droplets in the crop canopy, we designed and optimized an air-assisted electrostatic nozzle and conducted the spraying performance experiment. Parameters, such as charge-to-mass ratio (CMR) and particle size, were tested and analyzed to obtain the suitable operating parameters of nozzle. The results proved that the improved air-assisted electrostatic nozzle has good atomization and chargeability. There is a good charging effect with a charging voltage of 3,000-5,000 V, the CMR increased 127.8% from 0.86 to 1.97 mC/kg as the charge voltage increases from 1,000 to 4,000 V, at an air pressure of 1.0bar and liquid flow rate of 200 ml/min. Furthermore, we designed a multi-factor orthogonal experiment, which was conducted using a four-factor, three-level design to investigate the effects of operational parameters and canopy characteristics on droplet deposition and penetration. Analysis of variance (ANOVA) and F-test were performed on the experiment results. The results showed that the factor effect on droplet penetration, in descending order, was as follows: spray distance, leaf area index, air pressure, and air pressure × spray distance. The factor effect on abaxial leaf deposition, in descending order, was as follows: air pressure, spray distance, air pressure × charge voltage, spray distance × charge voltage, and charge voltage. For optimal droplet penetration and abaxial leaf deposition, option A 3 B 1 D 2 (air pressure 1.5bar, spray distance 0.2m, charge voltage 2,500 V) is recommend. The spray nozzle atomization performance and deposition regulation were studied by experimental methods to determine the optimal values of operating parameters to provide a reference for electrostatic spray system development.

Optimization of alginate extraction conditions from the brown seaweed Dictyota mertensii using a central composite design

This work extracts alginate from Dictyota mertensii, a brown macroalga found on the north coast of northeastern Brazil. A Central Composite Design (CCD) using Response Surface Methodology (RSM) was used to optimize the process of extracting the alginate present in the brown alga Dictyota mertensii, considering the factors of time, temperature, and concentration Na2CO3. Extraction yield (η), sulfate content, intrinsic viscosity ([η]), viscosimetric molar mass (Mv), color parameters (a*, b* e L*), M/G ratio and inhibitory concentration IC50 are model response variables. The Dictyota mertensii algae has its chemical composition expressed. Response surfaces are plotted from the variables studied, a quadratic model was predicted, the influence of factors is analyzed, and response variables are subjected to analysis of variance (ANOVA) and F-test at 95 % confidence. The predicted conditions are experimentally validated. The antioxidant potential was evaluated at seven concentrations (0.2–5.0 mg/mL) based on the stable free radical 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging. The maximum extraction yield was 29.28±0.02 %, and sulfate content ranged from 3.50±0,00 % to 12.33±0.29 %. The maximum values of [η] and Mv were 5.84±0.06 dL/g and 278.00±2.66 kDa, respectively. The alginate showed a dark brown color and M/G ratio < 1, indicating that the extracted alginate provides rigid and compact gels, which allows its application in films, encapsulations, and protecting probiotics. The maximum antioxidant capacity and the IC50 were 54.93±0.27 % and 0.51±0.07 mg/mL, respectively, indicating the material obtained as a moderate natural antioxidant.

Assessment of Various Post Systems’ Fracture Resistance after Endodontic Treatment

ABSTRACT Objectives: The study’s objective is to evaluate the fracture resistance of a tooth that has had endodontic treatment and has been rebuilt using various post and core systems. Materials and Methods: Thirty-six extracted premolar teeth of similar sizes were picked, and at random, they were separated into three groups: group A received stainless-steel posts, group B received zirconia fiber posts, and group C received glass fiber posts. Dual-cured resin cement was used to cement each post. The acrylic resin blocks have samples imbedded in them. Additionally, fracture loads were measured while a compressive force was given to the tooth at a crosshead speed of 1 mm/minute. The one-way analysis of variance F-test and post hoc Tukey’s test were then used to analyze the results. Results: When the mean values and standard deviation were compared, it was found that glass fiber posts had the highest fracture resistance, followed by posts made of zirconia fiber, while stainless-steel posts had the lowest fracture resistance Conclusion: When compared to zirconia posts and stainless-steel posts, glass fiber posts had the highest level of fracture resistance.

In vitro Evaluation of Remineralization Efficacy of Fluoridated and Nonfluoridated Toothpastes on Demineralized Enamel Surface

Aim: The aim of the present study was to compare the remineralization efficacy of fluoridated and nonfluoridated toothpaste on artificially demineralized enamel. Materials and Methods: Buccal surface of eighty extracted human premolars was treated with demineralizing solution for 96 h and they were randomly distributed into four groups. Group 1 was control, Group 2 was brushed with Xyliwhite toothpaste (fluoride free), Group 3 was brushed with Superbee Propolis toothpaste (fluoride free), and Group 4 was brushed with Amflor Pro toothpaste (Fluoridated). Brushing was performed for 2 min twice daily with a powered toothbrush for 7 days. After every brushing, the specimens were cleaned and stored in artificial saliva at room temperature. The enamel surface microhardness was measured with Vickers hardness test postdemineralization and posttreatment and a comparative analysis was made. Results: One-way analysis of variance F-test showed a statistically significant difference in remineralization efficacy among the groups (P &lt; 0.001). Tukey’s post hoc test showed that Group 2, Group 3, and Group 4 have higher remineralization efficacy as compared to control (P &lt; 0.001). Maximum remineralization efficacy was seen with Group 4. Conclusion: Fluoridated and nonfluoridated toothpastes have the potential to remineralize the demineralized enamel surface.

THE INFLUENCE OF WORK DISCIPLINE AND WORK MOTIVATION ON EMPLOYEE PERFORMANCE AT THE PUPR VIII COMPETENCY DEVELOPMENT CENTER FOR THE MAKASSAR REGION

In the dynamic landscape of current organizations, the performance of employees is a pivotal factor in achieving goals and maintaining competitiveness. A multitude of variables can significantly influence employee performance, with work discipline and work motivation being of particular importance. The Competency Development Center of PUPR VIII, located in the Makassar region, serves as the setting for this research, where the intricate interplay of these two variables on employee performance is investigated. This research seeks to ascertain the impact of work discipline and work motivation on employee performance within the ambit of the Competency Development Center of PUPR VIII, situated in the Makassar region. The research methodology employed is quantitative, utilizing a sample of 37 employees. Data analysis techniques encompass validity and reliability assessments, classical assumption tests, multiple linear regression analysis, T-tests, and F-tests. The findings of this study affirm a significant correlation between work discipline (X1) and work motivation (X2) and employee performance (Y), substantiated by T-test and F-test analyses. Furthermore, the results demonstrate that the F-value exceeds the tabulated F-value (0.000 &lt; 0.005). The coefficient of determination, R-square, amounts to 0.494%, underlining the influence of these variables on employee performance.

Surface topography assessment using chemical assisted ball end magnetorheological finishing

The generation of residual stresses by grinding process on the surface for a soft material result in poor performance and diminished life. Ball end magnetorheological finishing (BEMRF) process is a recently developed process that is effectively used for fine figuring and polishing of a variety of magnetic and non-magnetic materials. In this paper, grinding-induced residual stresses are addressed, and an attempt is made to relieve these residual stresses while achieving high surface finish using chemical assisted ball end magnetorheological finishing (CA-BEMRF) process. The chemical used in the present work is applied first time in BEMRF process and aluminium 7075 alloy workpiece has not been finished with this novel finishing process. The impact of various CA-BEMRF variables on percentage surface roughness reduction and percentage reduction in residual stresses are discussed statistically and graphically. Residual stresses of workpiece surfaces have been measured by using portable x-ray residual stress analyzer. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) of the finished workpiece before and after CA-BEMRF process is carried out to assess the effects of magnetizing current, tool rotation and working gap on surface topography of machined surface. It has been observed that reduction in residual stress is achieved along with high surface finish on aluminium workpiece surface using CA-BEMRF technique. Significant process parameters affecting the residual stresses and surface roughness during polishing of workpiece are obtained using Analysis of variance (ANOVA) and F-test. The optimization problem for maximum percentage reduction in surface roughness and maximum percentage reduction in residual stress is formulated as multi objective, multi variable, nonlinear optimization problem. Maximum percentage surface roughness reduction and minimum residual stress has been found at magnetizing current 2.3 A, rotational speed of tool 550 rpm and working gap of 0.5 mm. Confirmatory experimental tests have been conducted and results obtained were found very close to the predicted outcome.

Pengaruh Beban Kerja dan Disiplin Terhadap Komitmen Pegawai pada Dinas Pendidikan Pemuda dan Olahraga Kebupaten Solok

This study aims to analyze the effect of workload and discipline on employee commitment at the Solok district youth and sports education office. The sample in this study were 79 respondents with the total sampling method. Based on the results of multiple linear regression analysis of the variables Workload and Discipline on Employee Commitment with a value of Y = 14.413 + 0.259(X1) + 0.303 (X2) + e. From the t test conducted on the X1 variable, namely Workload with a t-count value smaller than t-table 1.735 &gt; 1.992, which means that the Workload variable has no effect on Employee Commitment, while the X2 variable, namely Discipline, obtains a greater t-count value from t-table 3, 832 &gt; 1.992 which means Discipline affects Employee Commitment. While the results of the f-test analysis obtained the f-count value is greater than the f-table, namely 10.860 &gt; 3.12, which means that Workload and Discipline together affect Employee Commitment.