The use of aluminum metal in daily life has widely used coloring techniques to enhance the aesthetic value of the metal. Aluminum anodizing process can produce porous on the metal surface. The formed porous can be used to store and hold the coloring agent to make them more durable. The research intends to observe the coloring characteristics on the aluminum surface influenced by several parameters of the anodizing process, including electrolyte concentration and electric current. In this study the current H2SO4 concentration was used as a variable to improve the quality of staining on anodized aluminum surfaces. The anodization process was carried out on H2SO4 electrolyte solution with variations in concentrations of 10% to 20% and the current density used was 3 A to 5 A. The tests were carried out using micro Vickers to observe the hardness value. The hardness was higher at lower concentration of electrolyte solution due to thinner layer of oxide film, scanning electron microscope to observe the structure and visual observations for anodized color quality. From the results given, the tendency of the lower current density the size and density of porous lower. With the same condition, the color was darker than higher current density.
This research is a qualitative and quantitative research that aims to find out and analyze the influence of waste bank program on the income of customers Mandiri Garbage Bank in Kebonsari Village, Citangkil District, Cilegon City. The population were 50 customers of Mandiri Garbage Bank, consisting of administrators (9 people), active members (15 people) and non-active members (26 people). Data collection methods used are questionnaires, observation, documentation and interviews. Data was analysed with linear regression formula. It's obtained the value of the bank's waste program (X) in 1 unit, it will cause a decrease in the value of the customer's family income (Y) which is 0.287 per unit. Hypothesis approvened by using the t test, and the result is no influence of the waste bank program variables on the variable income level of the customer family of Mandiri Garbage Bank in Kebonsari Village, Citangkil District, Cilegon City. This is evident from the value of t count (-1,981)
Wood has some weaknesses, such as susceptibility to weathering, easily attacked by termites, and low water resistance. An alternative material such as Natural Fibre-Reinforced Polymer (NFRP) composite should overcome those weaknesses. This research aims to make a composite with palm fibre and unsaturated polyester resin. Palm fibres immerse for 2 hours in NaOH solution with varying concentrations of 3%, 5%, and 7%. The volume fraction of palm fibre are 0%, 5%, 10%, 15%, and 20%. Woven roving fibreglass was added to compare the tensile strength of composite with or without natural fibre. The density of composites increased with the increase of fibre volume fraction. The highest tensile strength was obtained for 15% of fibre volume fraction, namely 23.8483 MPa. In contrast, the highest compressive strength was obtained for 5% of fibre volume fraction, namely 94.76 MPa. NaOH removed the impurities and waxy substances from the fibre surface and created a rougher surface topography after alkalization. The highest tensile strength was obtained with 7% NaOH, namely 14.674 MPa. The highest water absorption value was obtained at 3% NaOH concentration and 15% of fibre volume fraction, namely 1.445%. The addition of woven roving as reinforcement to natural fibre composite can increase tensile strength by 210%, from 13.882 MPa to 43.123 MPa.
Abstract. Work productivity is a concept that shows the relationship between work results and the unit of time needed to produce the product. A worker is said to be productive if he is able to produce more output than other workers for the same unit of time. Work productivity is influenced by several factors, including gender, age, health status / nutritional status, biological disorders of the female workforce, education, years of service and disruption in the work environment. A study of women has been carried out in a number of Gipang Small and Medium Industries (IKM) in the Cilegon area, Banten to determine the relationship between the nutritional status of female workers on the productivity of their work in making gipang (a typical Banten food made from sticky rice mixed with sugar water). The number of respondents as many as 40 people with criteria for female workers aged 20-45 years with healthy conditions, no menstruation, not pregnant, not in the puerperium and menopause, have worked to make gipang at least 2 years and at least educated at the level of junior / equivalent. Data analysis was performed using the statistical regression analysis method. The results of data processing showed that Fcount <Ftable (0.362 <0.55) showed that the nutritional value or Body Mass Index (BMI) did not significantly influence the productivity of female workers in GIPang Gipang. The p-value (Significance F) = 0.55 indicates that height and weight did not significantly influence the nutritional value of female workers. Tcount <ttable also shows that nutritional status does not have a significant effect on work productivity.Abstrak. Produktivitas kerja adalah suatu konsep yang menunjukkan adanya kaitan antara hasil kerja dengan satuan waktu yang dibutuhkan untuk menghasilkan produk. Seorang tenaga kerja dikatakan produktif jika ia mampu menghasilkan keluaran (output) yang lebih banyak dari tenaga kerja lain untuk satuan waktu yang sama. Produktivitas kerja dipengaruhi oleh beberapa faktor, diantaranya adalah jenis kelamin, usia, status kesehatan/status gizi, gangguan biologis tenaga kerja wanita, pendidikan, masa kerja dan gangguan di lingkungan kerja. Telah dilakukan penelitian kajian wanita di beberapa Industri Kecil Menengah (IKM) gipang di daerah Cilegon, Banten untuk mengetahui hubungan antara status gizi pekerja wanita terhadap produktivitas kerjanya dalam membuat gipang (makanan khas daerah Banten yang terbuat dari ketan dicampur dengan air gula). Jumlah responden sebanyak 40 orang dengan kriteria tenaga kerja wanita usia 20-45 tahun dengan kondisi sehat, tidak mengalami menstruasi, tidak hamil, tidak dalam masa nifas dan menopouse, telah bekerja membuat gipang minimal 2 tahun dan minimal berpendidikan setingkat SLTP/sederajat. Analisa data dilakukan dengan metode analisis statistik regresi. Hasil pengolahan data didapatkan Fhitung < Ftabel (0,362 < 0,55) menunjukkan bahwa nilai gizi atau Indeks Masa Tubuh (IMT) tidak berpengaruh secara signifikan terhadap produktivitas pekerja wanita pada IKM gipang. Nilai p-value (Significance F) = 0,55 menunjukkan bahwa tinggi badan dan berat badan tidak berpengaruh secara signifikan terhadap nilai gizi pekerja wanita. Nilai thitung < ttabel juga menunjukkan bahwa status gizi tidak memiliki pengaruh yang signifikan terhadap produktivitas kerja.
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