Comprehensive hygienic assessment of the dust factor in the manufacturing heat-insulating building products from man-made mineral fibers

2021 ◽  
Vol 61 (2) ◽  
pp. 77-83
Author(s):  
Katsiaryna A. Hutsich
Keyword(s):  
Linear Regression ◽  
Technological Process ◽  
Linear Regression Analysis ◽  
Basalt Fiber ◽  
Production Factor ◽  
Production Cycle ◽  
Mass Measurements ◽  
Mineral Fibers ◽  
Building Products ◽  
Positive Correlation

Introduction. Air pollution with aerosols of mineral fibers in the manufacturing heat-insulating building products is the primary harmful production factor that can increase the risks of developing several diseases of various organs and systems. It determines the relevance of conducting comprehensive studies of the dust factor in such industries, assessing the relationship between mass measurements and fibre counts, the development of targeted preventive measures, considering the features of the technological process. The study aims to conduct comprehensive hygienic studies of the dust factor in the manufacturing heat-insulating building products from basalt fiber and determine the morphological features of dust at different stages of the technological process, the presence of a relationship between mass measurements and fibre counts. Materials and methods. The studies were carried out based on manufacturing heat-insulating building products from basalt fiber. To assess the dust factor, the authors carried out the analysis of mass measurements of dust and fibre counts using phase-contrast light microscopy. The authors used linear regression analysis to study the dependence of the mass measurements and fibre counts. Results. The mass measurements of dust in the working area don't exceed hygienic standards and ranges from 0.51 mg/m3 to 1.19 mg/m3, and the fibre counts are from 0.45 f/cm3 to 1.23 f/cm3. The morphological analysis of the dust samples' preparations collected on filters from the air of the working area made it possible to reveal the characteristic features of the composition of the dust at various stages of the technological process. The study confirmed a positive correlation of weak strength between fibre counts and the mass measurements. The resulting dependence model is statistically significant, but the coefficient of determination of this model (R2) is 0.043. Fibre counts in the first phase of the production cycle are significantly higher than in the second. Simultaneously, the mass measurements do not have significant differences in different phases of the production cycle. Conclusions. There is a positive correlation of weak strength between fibre counts and mass measurements, but the resulting linear regression model can explain only 4.3% of the variation of fibre counts based on the mass measurements, which does not allow using this model for converting of the results of measurements of several particles. Microscopy of dust preparations makes it possible to determine the morphological picture characteristic of various stages of the technological process. Fibre counts depend on the phase of the production cycle. The data obtained can be used to design air purification systems and operating modes at various stages of the technological process.

scholarly journals Analisis Faktor Faktor Yang Mempengaruhi Produksi Pembenihan Ikan Mas Terhadap Pendapatan Petani (Studi Kasus di Kabupaten Aceh Tenggara)

2020 ◽  
Vol 2 (2) ◽  
pp. 129-138
Author(s):  
Ilhamdi Ilhamdi ◽  
Hasnudi Hasnudi ◽  
Gustami Harahap
Keyword(s):  
Regression Analysis ◽  
Descriptive Analysis ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Production Factor ◽  
Production Cycle ◽  
Net Income ◽  
Analysis Method ◽  
Fish Hatchery ◽  
Financial Feasibility

 Goldfish is one type of fish that have a fairly high economic value, it contains a lot of protein and cheaper. Fish hatchery is an activity that doing fish hatchery that will be produced fish seed, then followed up with the activities of breeding and growing. This study was carried out in the district of Lawe Bulan and the District Deleng Pokhisen Southeast Aceh district of Aceh province. Where the study area was determined by purposively. The purpose of this study was to analyze the business income of hatchery goldfish and financial feasibility, determining capital influence, large pool, the number of the parent, food seed, the labor against income of farmers seeder carp and analyze the influence of the level of education and experience of the farmers' income carp in the District Southeast Aceh. The sampling method used is the census method that is the entire population of the research sample. Data analysis method used is descriptive analysis method. To test the first hypothesis using Business Analysis, to examine the second hypothesis using analysis of Cobb-Douglas. To test the three hypotheses using Multiple Linear Regression Analysis with SPSS for Windows version 20. The results showed an average net income hatchery operations goldfish is Rp 5.814.200,- per production cycle. In terms of financial feasibility on carp hatchery operations in Southeast Aceh District covers the calculation of R/C ratio of 1.41. PP 4.8. BEP 2620834.0. Thus carp hatchery operations in Southeast Aceh district can provide benefits to farmers and to develop. Cobb-Douglas analyzes the results of each of the factors of production that have a significant effect (positive) is fodder seed (1.002), labor (0.908) and the parent (0.051). While the production factor is capital no significant effect (-0.028) and spacious pool (-0.164). Results Regression analysis of factors affecting skills that the education level (0.032) and experience (0,181).

Effect of the pH on the degree of autolysis of Aspergillus niger

1979 ◽  
Vol 57 (18) ◽  
pp. 1901-1903 ◽  
Author(s):  
R. Lahoz ◽  
Fuensanta Reyes ◽  
M. J. Martinez ◽  
Luis Jimeno
Keyword(s):  
Regression Analysis ◽  
Aspergillus Niger ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Defined Medium ◽  
Chemically Defined Medium ◽  
Effect Of Ph ◽  
Positive Correlation ◽  
Ph Values

The effect of pH on the degree of autolysis of cultures of Aspergillus niger autolysed at different pH values has been studied. In each experiment the fungus was grown in a chemically defined medium until autolysis commenced. At that time the pH was adjusted to values of 2, 4, 6, 8, or 10 and automatically controlled at that pH throughout the autolytic period. A positive correlation (r = 0.77) between pH and the degree of autolysis was found. Linear regression analysis indicated that the data were fitted by a line of slope 2.53 and an ordinate intercept of 41.83.

scholarly journals Fluoride intake from regular and low fluoride dentifrices by 2-3-year-old children: influence of the dentifrice flavor

2007 ◽  
Vol 21 (3) ◽  
pp. 234-240 ◽  
Author(s):  
Samanta Mascarenhas Moraes ◽  
Juliano Pelim Pessan ◽  
Irene Ramires ◽  
Marília Afonso Rabelo Buzalaf
Keyword(s):  
Body Weight ◽  
Regression Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Good Alternative ◽  
Strong Positive Correlation ◽  
Positive Correlation ◽  
Care Givers ◽  
Fluoride Intake

This study evaluated the fluoride intake from dentifrices with different fluoride concentrations ([F]) by children aged 24-36 months, as well as the influence of the dentifrice flavor in the amount of fluoride ingested during toothbrushing. Thirty-three children were randomly divided into 3 groups, according to the [F] in the dentifrices: G-A (523 µgF/g), G-B (1,062 µgF/g) and G-C (1,373 µgF/g). Dentifrices A and B are marketed for children, while dentifrice C is a regular product. The amount of F ingested was indirectly obtained, subtracting the amount expelled and the amount left on the toothbrush from the amount initially loaded onto the brush. The results were analyzed by ANOVA, Tukey's test and linear regression analysis (p < 0.05). Children ingested around 60% of the dentifrice loaded onto the brush, but no significant differences were seen among the groups (p > 0.05). Mean daily fluoride intake from dentifrice for G-A, G-B and G-C was 0.022ª, 0.032ª and 0.061b mg F/kg body weight, respectively (p < 0.01). There was a strong positive correlation (r = 0.86, p < 0.0001) between the amount of dentifrice used and the amount of fluoride ingested during toothbrushing. The results indicate the need for instructing children's parents and care givers to use a small amount of dentifrice (< 0.3 g) to avoid excessive ingestion of fluoride. The use of low-[F] dentifrices by children younger than 6 years also seems to be a good alternative to minimize fluoride intake. Dentifrice flavor did not influence the percentage of fluoride intake.

scholarly journals EFISIENSI EKONOMI FAKTOR PRODUKSI PADA USAHATANI BROKOLI DI KELURAHAN KAKASKASEN

2015 ◽  
Vol 11 (2) ◽  
pp. 70
Author(s):  
Juliana R. Mandei ◽  
Christy P. Tuwongkesong
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Multiple Linear Regression ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Production Factor ◽  
Production Factors ◽  
Npk Fertilizer ◽  
Factors Of Production ◽  
Douglas Production Function

The study aims to determine the efficiency of use of factors of production in Broccoli farming. Research carried out on all Broccoli farmers in Kakaskasen Village. Data were analyzed using multiple linear regression analysis with a model of Cobb-Douglas production function. The results showed that the uses of factors of production (land, seed, fertilizer and labor) have given a significant effect simultantly on the production of broccoli in Kakaskasen Village. Technically, the use of production factors of seed, fertilizer, NPK fertilizer and labor is efficient, while the use production factor of land is not efficient yet and Urea fertilizer production factor is not efficient. Economically, the use of production factors of land, seed, fertilizer, NPK fertilizer and labor have not been efficient yet, while the use of factors of production of urea is not efficient.

PENGARUH FAKTOR-FAKTOR INTERNAL PERBANKAN TERHADAP NON PERFORMING FINANCING PADA BANK UMUM SYARIAH

2019 ◽  
Vol 6 (2) ◽  
pp. 115-130
Author(s):  
Eka Ambara Harci Putranta ◽  
Lilik Ambarwati
Keyword(s):  
Linear Regression ◽  
Multiple Linear Regression ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Capital Adequacy ◽  
Annual Reports ◽  
Regression Methods ◽  
Capital Adequacy Ratio ◽  
Negative Effect ◽  
Independent Variable

The study aims to analyze the influence of internal banking factors in the form of: Capital Adequency Ratio (CAR), Financing to Deposit Ratio (FDR) and Total Assets (TA) to Non Performing Financing at Sharia Banks. This research method used multiple linear regression analysis with the help of SPSS 16.00 software which is used to see the influence between the independent variables in the form of Capital Adequacy Ratio (CAR), Financing to Deposit Ratio (FDR) and Total Assets (TA) to Non Performing Financing. The sample of this study was 3 Islamic Commercial Banks, so there were 36 annual reports obtained through purposive sampling, then analyzed using multiple linear regression methods. The results showed that based on the F Test, the independent variable had an effect on the NPF, indicated by the F value of 17,016 and significance of 0,000, overall the independent variable was able to explain the effect of 69.60%. While based on the partial t test, showed that CAR has a significant negative effect, Total assets have a significant positive effect with a significance value below 0.05 (5%). Meanwhile FDR does not affect NPF.

ANALISIS PENGARUH INFLASI, KURS DAN IHSG TERHADAP RETURN REKSA DANA SAHAM PT NIKKO SECURITIES INDONESIA PERIODE 2014-2017

2019 ◽  
Vol 2 (2) ◽  
pp. 103
Author(s):  
Muhammad Rois Rois ◽  
Manarotul Fatati Fatati ◽  
Winda Ihda Magfiroh
Keyword(s):  
Regression Analysis ◽  
Exchange Rate ◽  
Linear Regression ◽  
Multiple Linear Regression ◽  
Stock Price ◽  
Price Index ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Equity Fund ◽  
Stock Price Index

This study aims to determine the effect of Inflation, Exchange Rate and Composite Stock Price Index (IHSG) to Return of PT Nikko Securities Indonesia Stock Fund period 2014-2017. The study used secondary data obtained through documentation in the form of PT Nikko Securities Indonesia Monthly Net Asset (NAB) report. Data analysis is used with quantitative analysis, multiple linear regression analysis using eviews 9. Population and sample in this research are PT Nikko Securities Indonesia. The result of multiple linear regression analysis was the coefficient of determination (R2) showed the result of 0.123819 or 12%. This means that the Inflation, Exchange Rate and Composite Stock Price Index (IHSG) variables can influence the return of PT Nikko Securities Indonesia's equity fund of 12% and 88% is influenced by other variables. Based on the result of the research, the variables of inflation and exchange rate have a negative and significant effect toward the return of PT Nikko Securities Indonesia's equity fund. While the variable of Composite Stock Price Index (IHSG) has a negative but not significant effect toward Return of Equity Fund of PT Nikko Securities Indonesia

Struktur Organisasi, Desain Kerja, Budaya Organisasi Dan Pengaruhnya Terhadap Produktivitas Karyawan Studi Kasus Pada PT. XX Di Jakarta

Liquidity ◽  
2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Yanti Budiasih
Keyword(s):  
Organizational Culture ◽  
Regression Analysis ◽  
Linear Regression ◽  
Organizational Structure ◽  
Research Method ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Job Design ◽  
Employee Productivity ◽  
Dominant Influence

The objectives of this study are to analyze changes in organizational structure, job design, organizational culture and its influence on employee productivity at PT. XX in Jakarta and to identify variables that have a dominant influence on the productivity of employees. The research method used is using multiple linear regression analysis. The results show that the all variables simultaneously and partially change the organizational structure, job design, and organizational culture has a significant impact on employee productivity at PT. XXin Jakarta.

The Contribution of Sexual Identity Towards the Students’ Perception of Lesbian, Gay, Bisexual, and Transgender

10.32698/0642 ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 120
Author(s):  
Wiwi Delfita ◽  
Neviyarni S. ◽  
Riska Ahmad
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Sexual Identity ◽  
Student Perceptions ◽  
Undergraduate Students ◽  
Linear Regression Analysis ◽  
Sampling Technique ◽  
Simple Linear Regression ◽  
Simple Linear Regression Analysis ◽  
Bisexual And Transgender

Some students perceive lesbian, gay, bisexual, and transgender (LGBT) positively, even though LGBT is a sexual deviation that is not appropriate with values and norms. There are several factors that influence an individual's perception of LGBT, including sexual identity. This study aims at looking at the contribution of sexual identity to student perceptions about LGBT. This research used a quantitative approach with a descriptive method and a simple linear regression analysis. The sample of this research was 385 taken from 15.752 undergraduate students of Universitas Negeri Padang which the sample was drawn by using the Slovin formula and continued with a Proportional Random Sampling technique. The instrument used was the Guttman model's sexual identity scale and the scale of students' perceptions of the LGBT Likert model. After analyzing the data with the descriptive technique and the simple linear regression analysis, the results showed that sexual identity significantly contributed to the students' perceptions of LGBT. This research has implications as a basis for counselors to help students avoid sexual identity mismatches and prevent the emergence of positive perceptions of LGBT.

Pengaruh Penghargaan Terhadap Kinerja Karyawan pada CV. Dino Manunggal Karsa Bogor

2019 ◽  
Vol 4 (2) ◽  
pp. 17
Author(s):  
Dedy Mulyadi ◽  
Didik Purwanto
Keyword(s):  
Linear Regression ◽  
Performance Assessment ◽  
Correlation Coefficient ◽  
Linear Regression Analysis ◽  
Strong Relationship ◽  
Simple Linear Regression ◽  
New Employees ◽  
Company Policy ◽  
Effective Manner ◽  
Relationship Of

The question of compensation in addition to sensitive to be driving someone to worl due to an effect on morale and discipline employees. Therefore , any  agency or any organization should be able to provide compensation equal to the workload  to create a workforce that efficient and effective manner can be realized. Amaore than that, the company’s goal to improve performance. Performance assessment is a subjective process that involves human judgments. Thus, performance assessment is very likely wrong and very easily influonced by sources that are not actual, so it must be taken into account and considered reasinable. Frformance appraisals are considered  to meet the target if it has a good impact on new employees who rated their performance. Simple linear regression analysis using SPSS version 12:00 data processing obtained tegression equation Y = 0,487 X 74 + with an explanation of X = award, 74 = constant, 0.487 = coefficient awards, and Y = performance based on simple linear regression equation in case of increase of one unit of the  performance award will be increased 0.487 units. If company policy negates the performance award will remain at a constant rate (74) units . (A) Test results obtained thitung significant constants of (12.574) > t table for (1.960 then reject Ho constanta significant meaning. (B) significant Test award coefficient t count the results obtained by (2.164)> t table foe (1.96) then reject Ho the mean coeffent of appreciation affect the performance . (C) correlation coefficient analysis is done by calculating the product moment corration (pearson)  to test  whether or not a strong  relationship between the variables X  dan Y , based on the results of cakculations with SPSS  table valuse obtained by calculating the  correlation coefficient r (0.3100> r on the table for a = 0,05 (0.291) then reject Ho, which means there is a relationship of respect for performance. When we enter these valuse in the table shows the interpretation of the correlation coefficient between the interval from 0.20 to 0.399 which has a low relationship

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