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Design and development of pokayoke sensor mechanism using multi DOF motion for checking circlip installation onto output shaft: Automatic assembly line for 4W manual transmission at PT. Matahari Megah

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AIP Conference Proceedings 2023年第1期2680卷

作者： Agus Halim Kevin Raynaldo Study Program of Mechanical Engineering Faculty of Engineering Universitas Tarumanagara Jalan Letjen S. Parman No. 1 Jakarta Barat 11440 Indonesia PT. Matahari Megah Jalan Raya Serang km 8.5 Kadu Jaya Tangerang Indonesia

Automatic assembly line of 4W manual transmission sub output for producing output shaft has either station which must be maintained the result quality. It is station OP 10 that is need quality assurance mechanism for checking circlip installation result because of very precise assembly process needs especially circlip thickness and shaft gap which have transition fit with firm tolerance. Hence, the probability for improper circlip installation process result may occur. Based on the problem, a pokayoke sensor mechanism as quality assurance for checking circlip installation result is designed. It must comply the space limitation in assembly line such that is designed by multi DOF thus it can adapt to the limitation. The objectives in this design project are to design pokayoke sensor mechanism and to develop the mechanism using multi DOF motion so it fulfils the requirement. Design method of the project consists of determination pokayoke mechanism, setting up control system and sensor, and pokayoke sensor performance test. The pokayoke has 6 spatial DOFs which makes checking precisely in limitation space. Furthermore, the pokayoke is integrated by PLC which input signals will produce quality of circlip installation result as output signal. It utilizes photoelectric sensor to detect light intensity which emits through gap between emitter and receiver. This signal will be used to determine whether the installation result is OK or NG. Then, pokayoke is able to detect the quality of three dummy circlips in the performance test accurately which refers to actual probability of circlip installation onto output shaft. It shows that the pokayoke is satisfied to be applied in assembly line.

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Potential of Hydrogen Production through Alkaline Water Electrolysis Using Solar Radiation around Semarang 4

Potential of Hydrogen Production through Alkaline Water Elec...

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4th International Conference on Energy, Environment, Epidemiology and Information System, ICENIS 2019

作者： Widarningtyas, Ruth PranIndia Sulistyo Widayat Magister Program of Energy School of Postgraduate Studies Diponegoro University Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Diponegoro University Semarang Indonesia

Indonesian society's dependence on fossil fuel and the minimum GHG emission reduction target of 11% for the energy sector, encourages the development of hydrogen as an eco-friendly renewable energy resource for transportation and industries sector. Electrolysis is one of technology for hydrogen production. Electrolysis technology that utilizes the sun as a generating source is a eco-friendly technology of hydrogen production. The solar intensity in Semarang is 5.49 kWh/m2/day so that is potensial to used for hydrogen production. Solar intensity measurements were carried out in 2 locations in Semarang that have different altitude using single and parallel monocrystalline solar modules with observation from 8am-4pm. The measurement results are used as data for calculated the flow rate and the volume of hydrogen that can be produced. The highest hydrogen volume can be produced in Marina for single and parallel panel are 2,099.93 ml/h and 4,199.86 ml/h that are both at 10am. The highest hydrogen volume can be produced in Tembalang for single and parallel panel are 2,693.39 ml/h at 1pm and 5,751.98 ml/h at 11am. The altitude level of location greatly influences the solar intensity for hydrogen production. Parallel panel can produce hydrogen approximately 2 times single panel. © The Authors, published by EDP Sciences, 2019.

关键词： Hydrogen production

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Formulation of pomade with atisiri oil pandan wangi leaves (pandanus amaryllifolius roxb.)

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Journal of Physics: Conference Series 2021年第1期1833卷

作者： I P Siregar N Marliati Cosmetology Study Program Faculty of Engineering Universitas Negeri Yogyakarta Indonesia

This research aims to: 1) know the formulation of pomade making from aromatic pandan wangi leaf essential oil, 2) know the characteristics of pomade from the essential oil of pandan wangi leaves, and 3) know the quality of pomade from the essential oil of fragrant pandan leaves, and 4) the anti-fungal activity of pomade from the essential oil of pandan wangi leaves. Research methods used by research and development (R&d) models. Formulation of pomade manufacture of pandan wangi leaf essential oil is carried out based on the results of research that produces a stable formula that is pomade with the appropriate quality SNI with the base of pomade type oil based and not petrol based with a concentration of 34% of the total weight of pomade. Pomade formula is added to the essential oil of pandan wangi leaves with different concentrations of 2.5% (formula 1), 5% (formula 2) and 7.5% (formula 3). The characteristics and quality of pomade are known from organoleptic and hedonic tests that 47% of respondents strongly agree with pomade has the aroma of essential oil of pandan wangi leaves, 52% of respondents strongly agree with the color of pomade in dark green, 45% of respondents strongly agree with the texture of pomade very smooth without any granules, the respondent's response after pomade is on a smooth impression as much as 90.56% and the impression is moist as much as 90.00%. Formula 1 to formula 3 provide homogeneous results. Formulas 1 through 3 have a pH balance with pH range of hair and oil on the scalp which is 5.5 between pH 4.5 -5.5. The largest antifungal activity is in formula 3 (essential oil content 7.5%) with an inhibithor zone diameter of 37 mm. This indicates that the greater the concentration of pandan wangi leaf essential oil, the stronger the antifungal activity against niger's Aspergillus.

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Impacts of zeolite activation temperature and grain size toward bioretention system efficiency in removing Pb and Zn pollutant in stormwater runoff

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IOP Conference Series: Earth and Environmental Science 2021年第1期623卷

作者： E Martama N Suwartha Environmental Engineering Study Program Department of Civil Engineering Faculty of Engineering Universitas Indonesia Depok 16424 Indonesia

Stormwater runoff can be utilized as a clean water supply through a simple treatment technology such as a bioretention system. However, this water treatment efficiency is influenced by various factors. Previous research showed that although the bioretention system had combined with a plant and media composition, effluent concentration still exceeds the quality standard. This research aimed to improve the bioretention efficiency in removing heavy metal Pb and Zn in stormwater runoff. Three variations of bioretention were prepared, with the same combination of 2 types of plants (Chrysopogon zizanioides and Iris pseudacorus) and media composition (zeolite: quartz: compost: soil = 6:2:1:1). The zeolite activation temperatures and grain sizes simulated with three discharges variation of initial Pb and Zn concentration of synthetic stormwater runoff. The results showed that modified bioretention produced higher Pb removal efficiency (99.95% on average) and Zn (98.89% on average). Besides, the effluent concentrations have met the water quality standard following Government regulation No. 82/2001. In conclusion, the higher temperature of activated zeolite combined with smaller grain size significantly enhance the removal efficiency of Pb and Zn in stormwater runoff.

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The developing hairpiece module of the students at vocational secondary schools

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Journal of Physics: Conference Series 2021年第1期1833卷

作者： N Marliati M Agrevinna Cosmetology Study Program Faculty of Engineering Universitas Negeri Yogyakarta Indonesia

This study aims to analyze the validity and effectiveness of the hairpiece module. The research method used is development or known as the Research and Development method. The stages in the research process are the analysis, design, development, implementation, and testing stages. Tests carried out in the form of validation were carried out by expert judgments or media and material experts, then the media was tested by students. The results of this study get the assessment of media experts in the very feasible category and material experts in the very feasible category. The results of student trials in small group trials were in the good category and large group trials were included in the good category. The analysis of the pre-test and post-test results showed a gain of 0.53 in the experimental group with moderate criteria and a gain of 0.42.

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Textural characteristics of activated carbons derived from tabah bamboo manufactured by using H 3 PO 4 chemical activation

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Materials Today: Proceedings 2020年 22卷 148-155页

作者： Dewa Ngakan Ketut Putra Negara Tjokorda Gde Tirta Nindhia I Wayan Surata Fadjar Hidajat Made Sucipta Doctoral Study Program of Engineering Science Faculty of Engineering Udayana University Bali-80234 Indonesia Mechanical Engineering of Udayana University Jimbaran Badung Bali-80362 Indonesia PPPTMGB “Lemigas” Jl. Ciledug Raya Kav. 109 Jakarta Selatan 12230 Indonesia

Activated carbon utilization in a different application requires a specific characteristic. Textural characteristics such as pore volume (V P ), surface area (S A ), pore diameter (D P ) and pore size distribution (PSDs) have an important effect on the quality and utility of activated carbon. Such characteristics are attributed to the activated carbon adsorption capacity. This research is concerned to investigate the textural properties of activated carbons derived from tabah bamboo ( Gigantochloa nigrociliata ) which are chemically activated using H 3 PO 4 activating agent. Carbonization was carried out up to 800 O C for 1.5 hours. Activations were set up to 820 O C for each 50, 100 and 150 minutes. The activated carbons produced are expressed as AC-50min, AC-100min, and AC-150min each for activation during 50, 100, and 150 minutes. The results of the research show that the higher activation time produced activated carbons with higher pore volume and wider average pore diameter but no pattern was observed on the surface area. The highest surface area of 398.400 m 2 /g and the highest pore volume of 0.680 cc/g were achieved by AC-100min and AC-150min activated carbons, respectively. The highest N 2 adsorption capacity of 48.743 cc/g was achieved on the activated carbon of AC-150min. AC-50min, AC-100min, and AC-150min have average pore diameters, respectively, around of 1.258 nm, 1.750 nm, and 3.950 nm. AC-50min and AC-100min produced pores with a monomodal pore size distribution and a bimodal pore size distribution was found on AC-150min

关键词： Activated carbon bamboo chemical activation adsorption textural characteristic

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UNP Extinct Metric for Bilih Fish (Mystacoleucus padangensis Bleeker) 1

UNP Extinct Metric for Bilih Fish (Mystacoleucus padangensis...

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1st International Conference on Environmental Sciences, ICES 2018

作者： Razak, Abdul Ganefri Barlian, Eri Dewata, Indang Biology Department FMIPA Universitas Negeri Padang Indonesia Department of Electrical Engineering Faculty of Engineering Universitas Negeri Padang Indonesia Environmental Science Study Program Postgraduate Program Universitas Negeri Padang Indonesia

This paper write about UNP Extinc Metric. It is new approach and methods how to calculate extinc condition for wild animals especially bilih fish from Lake Singkarak. We introduce new criteria and ombine to seven categories from IUCN. For bilih fish we can calculate number extinc 49 and the meaning is endangered We conclude after that result we can conserve bilih fsh soon as soon for our life in biosfer. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Fish

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Comparative Assessment of Phenolic Composition Profile and Biological Activities of Green Extract and Conventional Extracts of Salvia Sclarea

SSRN

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SSRN 2023年

作者： Qurada, Mohammed Mansour Duru, Mehmet Emin Kucukaydin, Selcuk Tamfu Ngengue, Alfred Ngenge Iqbal, Mudassar Bibi, Hamida Khan, Rasool Ceylan, Ozgur College of Education Seiyun University Seiyun Yemen Department of Chemistry Faculty of Science Mugla Sitki Kocman University Mugla48000 Turkey Department of Medical Services and Techniques Koycegiz Vocational School of Health Services Mugla Sıtkı Kocman University Mugla Koycegiz48000 Turkey Department of Chemical Engineering School of Chemical Engineering and Mineral Industries University of Ngaoundere 454 Ngaoundere Cameroon Department of Agricultural Chemistry and Biochemistry The University of Agriculture Peshawar25000 Pakistan Department of Environmental Sciences Abdul Wali Khan University Mardan Pakistan Institute of Chemical Sciences University of Peshawar Peshawar25120 Pakistan Food Quality Control and Analysis Program Ula Ali Kocman Vocational School Mugla Sitki Kocman University Mugla Ula48147 Turkey Pharmacy Department Medical Sciences Aljanad University for Science and Technology Taiz Yemen

In recent years, green solvents have been developed and suggested to be an alternative to conventional solvents. In a current study, the green solvent was prepared at various molar proportions to extract of S. sclarea. Similarly methanolic and ultrasonic extracts the S. sclarea were prepared and subjected to study HPLC profiling antibacterial, antioxidant and enzyme inhibition activities. The phenolic composition identified by HPLC-DAD showed rosmarinic acid as the main content in all extracts, while ellagic acid was found only in the green extract. The green extract had better anti- biofilm activity in comparison to the methanolic and ultrasonic extracts agains S. aureus and E. faecalis at MIC concentration. Among the tested extracts, the ultrasonic extract showed strong inhibition of violacein production by C. violaceum with a inhibition range 05.5±0.1(MIC/32) to100±0.00(MIC), followed by green extract with a inhibition range 15.0±0.5(MIC/8) to 100±0.00(MIC). The green extract had the highest inhibition of swarming motility P. aeruginosa with inhibition 68.0±2.1(MIC) to 19.5±0.6(MIC/4). The green extract also exhibited better enzyme inhibitory activity against BChE with IC50=131.6±0.98µg/mL and against AChE with inhibition 47.00±1.50% better than methanolic and ultrasonic extracts. In contrast ultrasonic and methanoic extracts showed significant activity against urease enzyme with (IC50=171.6±0.95µg/mL and IC50=187.5±1.32µg/mL) respectively. Both green and methanolic extracts showed considerable antioxidant activities as β-carotene-linoleic acid(IC50=5.61±0.47µg/mL and 5.37±0.27µg/mL), DPPH• (IC50=19.20±0.70 µg/mL and 16.31±0.23µg/mL), ABTS•+(IC50=8.64±0.63µg/mL and 6.50±0.45µg/mL) and CUPRAC (A0.5=17.22±0.36 µg/mL and 12.28±0.12 µg/mL) respectively. However, the green extract showed activity better than methanolic and ultrasonic extract in metal chelating. © 2023, The Authors. All rights reserved.

关键词： Antioxidants

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The effect of interval of application of Nicotiana tabacum extract on growth parameters of Oryza sativa Inpari-32

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AIP Conference Proceedings 2022年第1期2534卷

作者： Dadang Sumardi Raden Adistie Parasati Rijanti Rahaju Maulani Sony Suhandono Andre Fahriz Perdana Harahap Misri Gozan 1Agricultural Engineering Study Program School of Life Sciences and Technology (SITH) Institut Teknologi Bandung Jalan Ganesha No. 10 Bandung 40132 Indonesia 2Department of Chemical Engineering Faculty of Engineering Universitas Indonesia Kampus Baru UI Depok 16424 Indonesia

The domestic consumption of rice (Oryza sativa) in Indonesia are increasing because of the population growth. One of the ways to increase rice productivity is by using external compounds such as plant growth regulators (PGRs) or phytohormones that function to affect growth. Tobacco plants can also be used as PGR because they contain allelopathic substances, organic matter, and other phenolic compounds that can affect plant growth. This study aims to determine the effect of intervals of tobacco extract application on the growth and yield of rice plants of the Inpari 32 variety. The study was conducted in a Randomized Block Design (RBD) with 4 interval treatments (control F0; once a week F1, once every two weeks F2, and every three weeks F3). One-Way ANOVA test was done at a 5% level and continued with a DMRT test, with variables of plant height, number of leaves, number of tillers, growth rate, phytohormones (auxin IAA; and gibberellic acid GA3), flowering age, harvest age, shoot and root dry weight, stover shoot root ratio, 1000 grain weight, the ratio of pithy rice grain to rice grain. Total, seed weight per clump, grain weight per plant, and productivity (tons/ha). The study results were that the application interval treatment did not show a significant effect on all test parameters, but the treatment interval of application of tobacco extract once a week (F1) showed a tendency for better results especially in the number of leaves.

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The obstacles of green building implementation in Semarang city

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IOP Conference Series: Earth and Environmental Science 2021年第1期700卷

作者： D N A Nugradi Study Program of Architecture Department of Civil Engineering Faculty of Engineering Universitas Negeri Semarang Indonesia

The Semarang City Government has issued a Mayor Regulation on Green Buildings since 2019. Since then the construction of buildings with a certain floor area in Semarang City must follow this regulation. Evaluating implementation constraints related to green building construction based on the experience of the development actors, is an important thing to do. This study aims to identify obstacles in realizing green buildings in the city of Semarang. Data collection was carried out through a questionnaire survey of respondents from development actors involved in green buildings such as contractors, consultants and project owners and bureaucratic officials related to green building licensing. Data analysis was performed using descriptive analysis to reach agreement between respondents. Next, a hierarchy of these constraints will be sought. Constraints found in realizing green buildings are: lack of socialization from the city government, alternative materials, lack of best practices, experts, and financing. For this reason, a strategy is needed to overcome these obstacles from every aspect or based on a combined consideration of all aspects.

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