bluuebunny/crossref_metadata_2025 huggingface dataset:
TINJAUAN TENTANG TATA RIAS PENGANTIN ADAT MANDAILING DI KECAMATAN LEMBAH MELINTANG KABUPATEN PASAMAN BARAT
Authors: Okveriza Zerti , Efrianova Vivi
Published: November 2022

Mandailing traditional bridal makeup in West Pasaman Regency needs to be studied because there is a mixing of two cultures between minangkabau culture and mandailing culture, in order to produce a clear and concrete picture of mandailing bridal makeup in  Pasaman. This study aims 1)to describe the shape and equipment of bridal makeup mandailing, 2) to describe the work process of bridal makeup mandailing, 3) to reveal what are the meanings of clothing and makeup equipment mandailing bride in West Pasaman Regency. This study uses a qualitative approach. Informant networking is done using snowball sampling technique. This research instrument is the researcher himself and assisted with supporting instruments such as tape rekorder, video tape, camera. Data collection techniques are carried out by observation, interviews and documentation. The steps of analyzing data are data collection, data reduction, data presentation and conclusion drawing. The results showed  1) The form of wedding dress on bridal makeup aadat mandailing in Nagari Ujung Gading, consisting of codecs / songket, basiba kuruang shirts from minang, shawl or Ulos from mandailing, with equipment consisting of golden moong, jagar-jagar and jarunjung, suri moon necklace, belt or bobat, puttu daboru bracelet, hissik bracelet, long nails, kris and tarompa. For the form of the groom's dress consists of a black biludru suit, sarawa gadang / lapang black, sesamping, and shawl or Ulos mandailing, with perengkapan such as hampu or ampu, belt, large plain bracelet, kris and tarompah. 2) The Process of Bridal Makeup Mandailing in Nagari Ujung Gading District Transverse Valley West Pasaman Regency. 3) The meaning of the form of clothing and bridal makeup equipment mandailing custom in Nagari Ujung Gading as a whole is for each use of minang clothing and mandailing equipment can only be worn by brides who carry out medium helatan or large helat. By fulfilling some provisions in "Sepanjang Adat Nagari". One of them is in slaughtering animals for helat. For medium helat animals sacrificed in the form of goats and for large helat in the form of buffalo animals. In this case it relates to the type of headdress (bulang) that the bride will wear. For medium helat bulang used is a five-tiered bulang or so-called bambeng (goat). And for large helat, the bulang used is a seven-storey bulang or called bulang barbo (buffalo). It is recommended to be able to maintain and preserve the existence of traditional bridal clothing and equipment mandailing.
KELAYAKAN DAUN PANDAN WANGI SEBAGAI MASKER TRADISIONAL PERAWATAN KULIT KERING
Authors: Rahmi Fadhilatur , Minerva Prima
Published: November 2022

Facial skin care generally has the objective of maintaining and improving skin health, as well as beautifying the skin's outer appearance. Pandan is a plant whose leaves are often used as an additional ingredient for food fragrance. Vitamin C found in fragrant pandan leaves has antioxidants that are better for facial skin. This study aims to a) analyze how to make a traditional pandan wangi leaf mask to moisturize dry facial skin, b) to analyze the quality of the pandan wangi leaf mask seen from the content of flavonoids, vitamin C, saponins found in fragrant pandan leaf masks, c) to analyze The quality of fragrant pandan leaf masks is seen from the texture, aroma, adhesion and preferences of researchers. This is a quasi experiment. The object of this research is  analyse fragrant pandan leaves which are made into natural mask powder. Tto analiyse  the flavonoids, vitamin C and saponins content, which is  carried out in the Chemical Laboratory of FMIPA UNP. And  to analyse  organoleptic test, by involving  7 panelists . Descriptive data  technique by displaying statistics and frequency. Based on the results of research, the process of making traditional pandan wangi leaf masks in this study was made in the form of powder, the quality of traditional pandan leaf masks based on laboratory test results showed that the content of flavonoids, vitamin C and saponins, based on organoleptic tests showed adhesion and preferences of panelists had a sufficient level high, while the texture aroma has the same value. Conclusion fragrant pandan leaves contain flavonoids, vitamin C and saponins. The organoleptic test showed the stickiness and preference of the panelists had a fairly high degree of initiation, while the aroma and texture had the same value.
PENGARUH GAYA HIDUP REMAJA TERHADAP PENGGUNAAN KOSMETIK CREAM TEMULAWAK DI NAGARI PITALAH KECAMATAN BATIPUH
Authors: Masela Dara , Yanita Merita
Published: November 2022

This study aims is to investigate the lifestyle of teenagers, the use of ginger cosmetics, and the effect of teenage lifestyle using ginger cosmetics cream in Nagari Pitalah, Batipuh. The population of  this study are  50 girls in Nagari Pitalah. The sample in this study 30 people using random sampling technique. The research instrument used a Likert scale questionnaire with 52 items of statements. Data analysis used SPSS version 20.00 program. The study of the resu1ts can be conc1uded that 1) the youth lifestyle in Nagari Pitalah, Batipuh District with a respondent's achievement level of 67.9% is in the sufficient category, 2) the use of whitening cream for ginger in Nagari Pitalah, Batipuh District with a respondent's achievement level of 67.8% is in the sufficient category 3) there is a lifestyle influence on the use of ginger whitening cream because tcount> t table (9.272> 2.042) with a contribution of 75.4%. Suggestions in this study are 1) For researchers, to research more deeply about the lifestyle that can affect the use of ginger whitening cream, 2) For adolescents, this research is in order to increase adolescent knowledge about the use of ginger whitening cream, 3) For majors, research This is so that it can be used as an additional reference for the Libraries in the Makeup Study Program and the Faculty of Tourism, Padang State University which researches the lifestyle and use of whitening creams.
PENGARUH DAMPAK PANDEMI COVID 19 TERHADAP MINAT KUNJUNGAN SALON KECANTIKAN DI KECAMATAN BUNGUS TELUK KABUNG PADANG
Authors: Meison Putri Meylani , Rosalina Linda
Published: November 2022

The difficulty of economic during the Covid 19 pandemic many consumers who do not have a job so do not have the budget to visit a beauty salon. This study aims to determine the impact of the covid 19 pandemic on the interest of beauty salon visits in Bungus Teluk Kabung Subdistrict, Padang City. emic covid-19, interest in salon visits. This type of research is a correlational quantitative research. The research was conducted at a beauty salon in Bungus Teluk Kabung Subdistrict, Padang City. The research population is visitors beauty salons located in The District Bungus Teluk Kabung Padang City which amounts to 30 people with random sampling techniques. Data retrieval technique is using questionnaires (questionnaires) that are adjusted in the form of Likert scales that have been tested for validity and reliability. Data analysis techniques using multipleregions and t. Based on the results of the study obtained 1) percentage of 77.79% with the category of impact of pandemic covid-19 is medium 2) percentage of 58.42% with the category of interest in salon visits is low 3) there is an influence between the impact of pandemic covid -19 to the interest of salon visits with a value of 2,554> ttabel of 1,998 while a significant value of 0.016<α0.05. It is recommended for salon owners to always apply health protocols every weekday and require visitors to wear masks and make banners about the application of health protocols in the salon environment, as well as provide a place to cuuci hands so that it makes the interest of visiting increasing.
STUDI TENTANG UPACARA ADAT PERKAWINAN DI KECEMATAN KINALI PASAMAN BARAT
Authors: Monia Yuke , Hayatunnufus Hayatunnufus
Published: November 2022

The researcher's background in making this thesis is due to changes in the series of traditional wedding ceremonies and bridal make-up in West Kinali Pasaman District, as well as the existence of several series of traditional ceremonies and make-up processes that were left behind as in a series of ceremonies before marriage, namely mancari chickens (proposing). usually done by a mamak to find a mate for his nephew but in Kinali sub-district this process is rarely done. Meanwhile, a series of marriage ceremonies, namely the marriage contract, was previously carried out at night, namely at the night of cooking rice, but over time the marriage contract was carried out during the day. In the form of bridal make-up in Kinali Subdistrict, before the bride was make-up she first performed the bahieh ritual, but nowadays bahieh ritual is very rarely done because makeup artists are more following the trend of makeup. Many wedding ceremonies in Kinali Pasaman Barat Subdistrict have been changed over the years but still follow the prevailing customs. Previously, bridal make-up in Kinali Pasaman Barat Subdistrict, before the bride and groom were dressed, they first performed the bahieh ritual, but over time, makeup artists followed the current trend of makeup. The form of bridal clothing and accessories in West Kinali Pasaman Subdistrict, the bridal clothing consists of batabue, tokah, kodek / skirt, suntiang gadang bridal accessories, kaluang and galang, groom's clothing consists of skirt, vest, sarawa, sasampiang, bridal accessories saluak, kaluang, galang and keris. Wedding clothing, along with the times, has been modified a lot as well as various clothing colors, which used to be identical to the red color of the wedding dress. The meaning of wedding dress in Kinali Pasaman Barat Subdistrict, suntiang, implies that a heavy burden will be borne by a wife when living a married life. Saluak is a male head covering which has a meaning as a symbol of the leader in the gadang house after having a family. As well as leading the children and their nephews according to the customary saying of minang anak dipangku kamanakan in urang kampuang dipatenggangkan. The skirt symbolizes the wearer's greatness and big spirit.
TINJAUAN PEMBELAJARAN PADA MATA KULIAH PRAKTIK SECARA DARING DI MASA PANDEMI COVID-19 JURUSAN TATA RIAS DAN KECANTIKAN
Authors: Arista Elsa , Yanita Merita
Published: November 2022

This study aims to describe the opinions of students majoring in make-up and beauty regarding practical lectures that are carried out boldly in terms of the teaching and learning process, the capabilities of the lecturers, and practical facilities and infrastructure. This type of research is descriptive quantitative. The research sample was 46 students majoring in make-up and beauty, of whom 21 students from class 2018 and 25 students from class 2019. The research variable is a single variable. The research instrument used a questionnaire with a Likert scale which stated as many as 60 items. The research data were analyzed using descriptive analysis of proportions using SPSS 20. The results showed that student learning was as big as make-up and beauty towards practical subjects 77.95% boldly with moderate criteria. Student learning review includes 3 indicators in the form of practical learning and teaching processes, lecturer capabilities, practical facilities and infrastructure. Student learning of practical subjects as seen from the indicators of the teaching and learning process with a result of 80.40% with good criteria. Student learning towards practical subjects is boldly seen in terms of lecturer capability (lecturer competence) with a result of 82.13% with a good category. And student learning towards practical subjects was boldly seen in terms of practical facilities and infrastructure with a result of 71.32% in the moderate category. Based on the results of research for research for students to carry out practical lectures in a bold and serious manner by providing practical facilities and infrastructure so that the practices we carry out boldly can be carried out in accordance with the objectives of the lecture.
KELAYAKAN BUBUK SINGKONG KUNING SEBAGAI MASKER UNTUK PERAWATAN KULIT WAJAH BERMINYAK
Authors: Rahmadani Sri , Minerva Prima
Published: November 2022

Traditional yellow cassava mask can be used as a cosmetic facial treatment made from natural and easy to get and contains vitamins that are good for facial skin. The purpose of this study is 1) To analyze how to make yellow cassava mask feasibility yellow cassava mask traditionally for oily facial skin care, 2) To analyze the feasibility of yellow cassava mask seen from the content of vitamin  B1, C, and Ca contained in yellow cassava mask, 3) To analyze the feasibility of yellow cassava mask seen from the texture, aroma, adhesions, and favorite of panelists. This type of research is descriptive quantitative research. The object of this study was yellow cassava which was made into a natural powder mask. This type of data uses primary data. Data collection techniques using documentation, observation, and tests. Data analysis techniques used are descriptive analysis techniques and analysis methods.The result of the study is the quality of traditional mask yellow cassava powder based on laboratory test results can be known that Vitamin B1 contained in the traditional mask of yellow cassava powder is as much as 0.03 mg. Vitamin C contained in the traditional mask of yellow cassava powder as much as 70.19 mg. Ca contained in traditional mask yellow cassava powder as much as 24,957%. Based on organoleptic tests showed the texture, aroma, adhesion, and liking of panelists had a fairly high level of assessment. Some panelists said that the traditional mask of yellow cassava powder is very good as a mask that can overcome oil content on oily facial skin, as well as make the face smoother and brighter. It is recommended to students to add insights in the field of traditional cosmetics and use them in accordance with the condition of the facial skin
PENGARUH PENGAPLIKASIAN FOUNDATION SEBAGAI DASAR MENGGUNAKAN TEKNIK CUT CREASE TERHADAP HASIL RIAS WAJAH PENGANTIN SUNDA PUTRI
Authors: Fadhilah Afifah Atasya , Rahmiati Rahmiati
Published: November 2022

Cut crease is usually applied with light colors to strengthen the eyes. Foundation application technique as the basis of using cut crease with eyeshadow application to emphasize the folds of this eye will give a greater dimension and eye effect. This study aims to a) Analyze the results of application without foundation as the basis of using cut crease techniques against the makeup results of Sundanese Brides, b) Analyzing the results of foundation application as the basis of using cut crease techniques against the makeup results of Sundanese Brides and c) Analyzing the differences in the influence of application without foundation and with foundation as the basis of using cut crease techniques against the makeup results of Sundanese Princess brides.This type of research is pre-experimental design. The population of this study is a student of Padang State University with an age range of 19 years to 23 years, has a close to normal eye shape and has a normal skin type that has no allergy to cosmetics with 6 samples and 7 panelists. Data retrieval technique is purposive sampling method. Data analysis techniques use descriptive statistic techniques with percentages and t-tests to describe hypothesis tests. Based on the results of the study seen from 3 people sampled in the group without foundation application of the aspect of sharpness of eyeshadow color obtained an average of 2.1414 categories less clear, aspects of the impression of eyelid shape obtained an average of 2.3329 categories less formed and aspects of favorite observers averaged 2.1886 categories less likes. Furthermore, the results of the study were seen from 3 people sampled in the group with foundation application of the aspect of sharpness of eyeshadow color obtained an average of 3.5729 categories very clearly, aspects of the impression of eyelid shape obtained an average of 3.2843 categories formed and aspects of favorite observers averaged 3.1886 categories likes. There is a difference in the sharpness of the eyeshadow color without foundation and with foundation, the value p = 0.000 (p<0.05), there is a difference in the impression of the shape of the eyelids without foundation and with foundation, the value p = 0.003 (p<0.05) and there is a difference in the preference of observers without foundation and with foundation, the value p = 0.002 (p<0.05). It is recommended for makeup and beauty students to be able to apply foundation as the basis of using cut crease technique to make up sundanese bride's makeup.
FAKTOR-FAKTOR YANG MEMPENGARUHI KETERLAMBATAN PENYELESAIAN STUDI MAHASISWA PROGRAM STUDI PENDIDIKAN TATA RIAS DAN KECANTIKAN FPP UNP
Authors: Pramika Yola , Rosalina Linda
Published: November 2022

This exploration was spurred by numerous understudies of the Cosmetology and Beauty training study program who experienced deferrals in finishing their examinations. The deferral in finishing studies is affected by inward and outer elements. This investigation intends to: 1). to dissect the impact of inner elements on the postponement in finishing the investigations of understudies in Makeup and Beauty Education. 2). To break down the impact of outside factors, the postponement in finishing the investigations of understudies in Makeup and Beauty Education. 3). To investigate the impact of inward factors and outside factors together on the postponement in finishing the investigations of understudies in Makeup and Beauty Education. This kind of exploration utilizes a quantitative system. The subjects of this examination are the understudies of the Cosmetology and Beauty Education Study Program, FPP UNP class 2016. In the mean time, the object of this examination is the elements that influence the deferral in finishing understudy considers. The populace in this investigation were 25 2016 understudies who were still effectively enlisted as UNP understudies and the testing strategy in this examination utilized the complete inspecting method. The information assortment procedure utilized is a survey/poll and appropriated through Google Form. Testing the instrument in this examination is a trial of the legitimacy of the instrument and test the dependability of the instrument. The information investigation strategy in this exploration is graphic examination method, investigation essential test and various relapse examination. In view of the aftereffects of the investigation, it was presumed that there was a huge impact among inside and outside factors on the postponement in finishing the investigation of understudies of the cosmetology and magnificence schooling study program. It tends to be seen that inside factors significantly affect the deferral in finishing concentrates by 37.2%, outer factors essentially influence the postponement in finishing understudy concentrates by 47.05%, and inner and outside factors fundamentally impact the postponement in finishing understudy examines. sebasar 71.2%. While the excess 28.8% is impacted by different elements. Thus, in general every factor affects the postponement in finishing understudy examines. It is suggested that understudies can seek after learning systems well so that deferrals in finishing studies can be survived
PERBEDAAN PENGAPLIKASIAN EYEBROW COMPACT POWDER DENGAN EYEBROW GEL PADA RIAS PENGANTIN BARAT
Authors: Klistiani Mela , Yanita Merita
Published: November 2022

The purpose of this study is to a) Knowing the different results of applying eyebrow compact powder to western bridal makeup b) Knowing the different results of applying eyebrow gel to western bridal makeup c) Knowing the differences in the results of applying eyebrow compact powder to eyebrow gel to western bridal makeup. The type of this research is pre-experimental. the sample in this study amounted to 6 people. The data collection technique is purposive sampling. Descriptive data analysis technique by displaying the mean, standard deviation, minimum and maximum values. Analysis of the data used is the independent-sample t-test. The results of the application of cosmetic eyebrow compact powder on western bridal makeup, it was found that the highest value was obtained in the smoothness and preference section, namely 3.57 having very fine criteria and very liking. In the results of the application of eyebrow gel cosmetics on western bridal makeup, it was found that the greatest value was obtained in the accuracy aspect, namely 3.04 having the right criteria. There are differences in the results of the application of eyebrow compact powder and eyebrow gel cosmetics on western bridal makeup on the aspect of accuracy (p=0,377), on the aspect of smoothness (p=0,013), on the aspect of neatness (p=0,015) and the aspect of liking (p=0,002). Based on the results of the research analysis, it was found that there were differences in the analysis of the results of the application of eyebrow compact powder with eyebrow gel in western bridal makeup.
DEVELOPMENT OF COORDINATIONS TEST SYSTEM BASED ON ARDUINO
Authors: Rahmad Hidayat Adibil Mahdi , Yohandri Yohandri
Published: November 2022

ABSTRACTIn sports activitiesaplaying tennis ball, a player will appear to haveagood coordination if he can move towards the ball while swinging his racket, then hit with the correct technique. At the moment, the catch and throw exercise is still counted manuallyowith the help of other people and is not veryieffective at doing it. catch is a test to determine the coordination between the eyes and hands using a tennisoball as a throw. The purpose of this study was to determine the performancetspecifications and designwspecifications of the Arduino-based fishing throwing tool to measure eye-handkcoordination. This re search includes engineering research. This study describes the performance specifications and designhspecifications of the catch and capture tool. The performance aspecification describes the function of the catch-and-catch tool builder, while the design specification describes the precision and precision of the tool. The measurement technique is carried out directly and iindirectly. Direct measurementscare made of the vibration and light intensity, while indirect measurements are carried out by analyzing the accuracy and accuracy of the catch and throw tool. The results of research on performance specifications and designuspecifications. First, the performance specification of the catch and catch device consists of an LDR sensor, a vibration sensor, and an electronic circuit that builds a catch-and-catch system. The secondaresult, the results of the design speccifications of this study consisted of the characterization of the tools and the accuracycof the catch and throw tool. The accuracy value of the catch throw tool is 100%.
HAZARD SEISMIC ZONATION ANALYSIS OF WEST SUMATRA REGION USING PROBABILISTIC HAZARD SEISMIC ANALYSIS (PHSA) METHOD
Authors: Rajif Mudzullah , Syafriani Syafriani
Published: November 2022

Indonesia is one of the countries that is prone to high intensity seismicity, where Indonesia is located between three main plates, namely the Eurasian plate in the north, the Indo-Australian plate in the south and the Pacific plate in the northeast. As a result of the meeting of the three plates, Indonesia has a high level of seismicity both on land and at sea. One of the provinces with a high level of earthquake hazard is West Sumatra. Seismic hazards are useful in designing earthquake-resistant buildings and can describe the effects of earthquakes at a location which will help in anticipating community preparedness and earthquake disaster mitigation efforts. This type of research is descriptive, namely by collecting catalog data for the NEIC / USGS earthquake with the period 1969-2019 with M ≥ 5 S.R. Seismic hazard data processing uses the probabilistic seismic hazard analysis (PSHA) method. PSHA is based on earthquake parameters that produce the greatest ground motion. The magnitude of the intensity at a location due to an earthquake in the earthquake source area with a magnitude M and a distance of R can be used as an attenuation function. The attenuation function used in this study is Joyner-Boore (1997) and Young et al (1997). The results show that the largest seismic hazard occurs in the PGA with a maximum range of 1.28 g - 3.69 g in the Mentawai Islands region. The seismic hazard level is in the Bukit Barisan area with a maximum PGA value of 1.72 g - 2.12 g.
THE EFFECT OF HYDROPHOBIC CALCINATION TEMPERATURE VARIATION OF SILICA / POLYSTYRENE COMPOSITE (SiO2 / PS) ON THE DURABILITY OF SELF CLEANING MATERIALS
Authors: Juliawati Dila , Ratnawulan Ratnawulan
Published: November 2022

Nature possesses functional architectural and surface characteristics. The functional surface is one of the surfaces of taro or lotus leaves which has water-repellent (hydrophobic) properties. Water repellency is the ability to form on surfaces that escape from water (such as glass, ceramics, etc.). The purpose of this study was to determine the resistance of the surface layer on the SiO2/PS layer which is expected to be used for self-cleaning applications using calcination temperatures of 30oC, 60oC, 90oC, 140oC and 180oC for 1 hour using a furnace. This research is a type of experimental research conducted at the Material Physics Laboratory of FMIPA and the FMIPA Chemistry Laboratory, Universitas Negeri Padang (UNP). This study uses a HEM-3D (High Energy Milling Ellipse-3D Mention) tool. The precursor was made by giving the composition of 0.5 grams of polystyrene (PS)  and 0.2 grams of silica powder. Coating is done by using the spin coating method and giving the calcination temperature using a furnace. The results of this study were the variations in the calcination temperature of the SiO2 / PS composite hydrophobic on the resistance of the coating showed a change in the contact angle. Largest contact angles at temperatures of 60oC and for durability using contact angle tests with a distance of several days. The change in the contact angle decreases greatly, but the value of the contact angle is greatest at 60oC.
The Effect of Sintering Temperature on Hydrophobic Characteristic of Silica Manganese /Polystyrene (SiMn/PS) Nanocomposite
Authors: Septiana Dian , Ratnawulan -
Published: November 2022

Currently a lot of research has been done on hydrophobic layers, but in its application the layer is easily damaged and is not corrosion resistant. Therefore, this research intends to decide the effect of variations insintering temperature on the hydrophobic characteristic of SiMn/PS nanocomposite layers using a sintering temperature of 60oC,100oC,140oC,180oC and 200oC for 1 hour using a furnace.This research was conducted in the Material Physics Laboratoryof0theFacultyof0Mathematics and Natural Sciences and the Chemistry Laboratory of0th eFaculty of0Mathematics and Natural Sciences,Padang State University.This research uses HEM-3D (High Energy Milling Ellipse-3D Mention), XRD(X-RayDifraction) and0SEM (ScanningElectron Microscope) tools. The precursor was made by giving 0.5 grams of polystyrene, 0.2 grams of silica powder and 0.2 grams of manganese powder. Coating is done by spin coating method. The results of this research from the variation of the sintering temperature showed that the SiMn/PS nanocomposite layer was hydrophobic based on the contact angle test.The highest contact angle is at a temperature of 600C.Currently a lot of research has been done on hydrophobic layers, but in its application the layer is easily damaged and is not corrosion resistant. Therefore, this research intends to decide the effect of variations in sintering temperature on the hydrophobic characteristic of SiMn/PS nanocomposite layers using a sintering temperature of 60oC, 100oC, 140oC, 180oC and 200oC for 1 hour using a furnace. This research was conducted in the Material Physics Laboratory0of0the0Faculty0of0Mathematics0and0Natural0Sciences and the Chemistry Laboratory0of0the0Faculty0of0Mathematics0and0Natural0Sciences, 0Padang0State0University.This research uses HEM-3D (High Energy Milling Ellipse-3D Mention), XRD0 (X-Ray0Difraction) 0and0SEM0(Scanning Electron Microscope) tools. The precursor was made by giving 0.5 grams of polystyrene, 0.2 grams of silica powder and 0.2 grams of manganese powder. Coating is done by spin coating method. The results of this research from the variation of the sintering temperature showed that the SiMn/PS nanocomposite layer was hydrophobic based on the contact angle test. The highest contact angle is at a temperature of 600C.
The Effect of Variation in SiMn/PS Nanocomposite Composition on Hydrophobic Properties
Authors: Putri Sisi Gusti , Ratnawulan -
Published: November 2022

Many researches on the synthesis of hydrophobic coatings have been carried out, but in use, the coating is easily scratched, easily damaged by contact with other objects and easy to corrode, thereby reducing the quality of the coating. This can hinder the application of hydrophobic coatings in industry and others. Therefore, it is necessary to develop a hydrophobic coating that is strong and durable and anti-corrosion so that it can improve the quality of a surface. For this reason, research is carried out by mixing a substrate that has anti-corrosion properties such as silica and is hard such as manganese in order to overcome the problems that occurred previously using the spin coating method. The precursor was made by adding 0.5 grams of polystyrene composition, with varying SiMn composition. The coating was carried out using the spin coating method and the calcination temperature was 60°C using an oven for 1 hour. The results of this study from the composition variation showed that the SiMn/PS nanocomposite layer was hydrophobic based on the contact angle test. The largest contact angle at 50%:50% composition.
THE EFFECT OF THE AMOUNT OF IMMERSION OF ZnO DOPING Ag THIN LAYER ON BAND GAP WITH DIP COATING METHOD
Authors: Maulid Farhan El , Yohandri - , Sanjaya Hary
Published: November 2022

The availability of fossil energy is decreasing day by day. Therefore, a New Renewable Energy solution is needed. One of the renewable energy is DSSC. DSSC is a photoelectrochemical-based solar cell that has a lower cost, less difficult preparation, and is environmentally friendly. DSSC be composed of working electrode, dye, electrolyte, and counter electrode. This researchintend to investigate the performance of the working electrode where the manufacture of a thin film using the dip coating method with variations in immersion and its effect on the efficiency of DSSC. This research is an experimental research. In this study, the semiconductor working electrode was made based on 9% ZnO/Ag synthesis by going through a sol-gel process. The working electrode was coated with variations of immersion 1, 3 and 5 times. The 9% ZnO/Ag thin layer was characterized by UV-DR Spectrometer. Based on the results, 9% Ag doped ZnO deposited on the ITO substrate with variations of immersion 1, 3 and 5 times showed, a band gap of 3.09 eV, 3.10 eV and 3.12 eV, respectively. Based on these data, it was applied to DSSC with the optimum efficiency shown at the electrode 1 time dip. Therefore, the greater the amount of immersion, the lower the efficiency of the DSSC.The availability of fossil energy is decreasing day by day. Therefore, a New Renewable Energy solution is needed. One of the renewable energy is DSSC. DSSC is a photoelectrochemical-based solar cell that has a lower cost, less difficult preparation, and is environmentally friendly. DSSC be composed of working electrode, dye, electrolyte, and counter electrode. This researchintend to investigate the performance of the working electrode where the manufacture of a thin film using the dip coating method with variations in immersion and its effect on the efficiency of DSSC. This research is an experimental research. In this study, the semiconductor working electrode was made based on 9% ZnO/Ag synthesis by going through a sol-gel process. The working electrode was coated with variations of immersion 1, 3 and 5 times. The 9% ZnO/Ag thin layer was characterized by UV-DR Spectrometer. Based on the results, 9% Ag doped ZnO deposited on the ITO substrate with variations of immersion 1, 3 and 5 times showed, a band gap of 3.09 eV, 3.10 eV and 3.12 eV, respectively. Based on these data, it was applied to DSSC with the optimum efficiency shown at the electrode 1 time dip. Therefore, the greater the amount of immersion, the lower the efficiency of the DSSC.
The Effect of Variations of Bagasse Sugarcane Fiber Composition with Plastic/Polypropylene Waste Matrix and Paper Sludge Filler on Acoustic Testing on Composite Panels
Authors: Syirpia Kasih , Hidayati - , Darvina Yenni , Jonuarti Riri
Published: November 2022

Noise can affect a person's health and comfort. Noise can cause mood disorders, anxiety, and stress. One of the efforts to control noise is the selection of acoustic materials. The utilization of these materials can use as panels that can muffle sound, thereby reducing noise.  In this study, bagasse fiber, polypropylene plastic waste, and paper sludge were used as materials in the manufacturing of composite panels. The method used is the impedance tube method. The greaterzthe sound absorption coefficient, the betterethe material is used as a sound dampening material. In this study, the composition of polypropylene plastic and paper sludge was 40:60, and variations in fiber composition of 0%,1%,2%,3% of the total weight of the composite panel. The bagasse fiber used is a fiber that has been alkalized to a good mechanical interlocking between the fiber and the matrix.Based on the results, the highestasound absorptionrcoefficienteis 0.98 atea frequency of 8000 Hzsfor a 3% fiber composition. The lowest soundeabsorptionrcoefficient is 0.63 at arfrequency of 2000eHz, for a 0% fiber composition. The more fiber composition used in the composite panel, the higher the resulting sound absorption coefficient. More bagasse fibers can increase the pores and thickness of the composite panel so it can absorb the sound that passes through it. The greater the soundaabsorption coefficient, the better the materialeis used as sound material. All sample variations meet the standard requirements as noise materials in buildings, namely 0.15
SEISMIC RATE CHANGE ANALYSIS BASED ON SPATIAL DISTRIBUTION OF SEISMOTECTONICS IN NORTHERN SUMATRA
Authors: Zakiyah Vicky Fikrotu , Syafriani S
Published: November 2022

The northern Sumatra has a high level of seismic activity. Before a significant earthquake occurs, there is a seismic quiescence phenomenon that precedes a significant earthquake.This phenomenon can be observed in seismic rate changes based on the spatial distribution of z-value.The data used are from the NEIC/USGS website, period 1990-2021. The study was conducted in five focus zones, three zones in the 2004 (9.2 SR), 2005 (7.8 SR) 2010 (7.1 SR) earthquake, two zones with coordinates 0.6-1.8 North Latitude and 96.8-97.6 East Longitude and zones with coordinates 3.6-4.8 North Latitude and 97.8-98.6 East Longitude. Using the z-value spatial distribution method, the region is divided into several grids. Z-value is calculated for each grid and describes the seismic rate change in the northern Sumatra. Based on the results obtained, before the 2004, 2005, and 2010 earthquake events, there was a seismic quiescence phenomenon that preceded the earthquake event. The seismic quiescence phenomenon appears afew years in early 2021 in a zone that has high seismic activity. Meanwhile, in zones that have low seismic activity, the increase seismic activity appears six years before the beginning of 2021. The spatial distribution of z-values in early 2021, there is a phenomenon of a decrease in seismic activity in several areas of northern Sumatra.
THE EFFECT OF PH VARIATIONS ON THE STRUCTURE OF THE MnFe2O4/PS NANOCOMPOSITE LAYER AS SELF CLEANING
Authors: Ipal Ipal , Ratnawulan -
Published: November 2022

Manganese is a metal element found in group VII, has an atomic weight of 54.93u, with a boiling point of 20320˚C, while the melting point is 12470˚C, and has a reddish-gray color. Iron (III) oxide (Fe2O3) or also known as hematite or maghemite iron ore, iron hematite (α – Fe2O3) is a simple oxide which has a hexagonal (rhombohedral) structure and has the R3c space group. Manganese was used as reinforcement in this research, while the matrix used was polystyrene. In this study, 5 variations of pH MnFe2O4/PS, namely 5,6,7,8 and 9 nanocomposites were synthesized using the spin coating method with manganese oxide (MnO2) and iron ore (Fe2O3) precursors. The composite gel is dropped on the glass substrate then the drying process is carried out in an oven. MnFe2O4/PS nanocomposites were characterized using X-Ray Diffraction (XRD). giving acid and alkaline solutions affects the size of the crystals, when adding a base (25% Na4OH) the crystal size becomes small while when the acid is added (100% CO3COOH) the crystal size is larger. : pH 8: pH 9 an increase in crystal size and grain size occurs.
THE EFFECT OF VARIATIONS OF COMPOSITION OF FELSDPAR AND THE SHELL OF PENSI SHELL (Corbicula Moltkiana) FROM LAKE MANINJAU ON THE FLEXIBILITY OF DENTURE
Authors: Sopianti Arni , Jonuarti Riri , Ratnawulan - , Gusnedi -
Published: November 2022

Utilization of waste pensi shells (Corbicula Moltkiana) in Lake Maninjau has not been fully optimal so that a more economical business is needed. One of them is the use of calcium oxide in pensi shells. Calcium oxide is one of the most commonly used calcium in the manufacture of dentures. This study aims to determine the value of the optimum flexural strength of the denture in order to obtain a higher quality denture material on the pensi shell that can be utilized and which has economic value. The method used is the experimental method. The sample used in this study with a size of 90 mm X 18 mm X 8 mm for testing flexibility / flexural strength. The total samples used in this study were 12 samples for testing the flexibility/flexural strength using a bending testing machine. For the use of pensi shell material, a calcination process was carried out at a temperature of 1000℃ on the pensi shell material and then characterized using XRF to determine the ingredients. The results of the characterization using XRF showed that pensi shells contain calcium elements of 97.121% and about 3% other elements such as Si, Al, P, Ag, Mn and Fe. Then the pensi shell material is mixed with other ingredients such as felsdpar, quartz, and kaolin. The material is mixed and then molded for flexural testing specimens. Based on the test results of this study, the highest flexibility value for denture samples was found in sample 4 with the most variations of pensi shell powder. The highest denture flexibility value is 25.778 MPa with a variation of 30 gram pensi shell powder in sample 4. The lowest denture flexibility value is 5.727 MPa with a variation of 0 gram pensi shell powder in sample 1. This is due to the addition of pensi shell powder. can increase the value of flexibility in dentures. The increase in the flexibility value was influenced by the CaO content obtained from the pensi shell powder.
CHARACTERIZATION STRUCTURE MICRO OF GRAPHENE OXIDE WHICH SYNTHESIS FROM BAGASSE WITH MODIFIED HUMMERS METHOD
Authors: Wahyuli Viola Sesri , Ramli -
Published: November 2022

This study aims to form a graphene oxide layer from bagasse, which by knowing the microstructure of the layer graphene oxide can be used as microwave absorption. In the process, bagasse is made into activated carbon with various carbonation temperatures, namely 300oC, 350oC, 400oC and 450oC. Then it was synthesized using the modified hummers method by mixing carbon with H2SO4, KMnO4, H2O2 and aquades. Then they were characterized using FTIR, XRD and SEM.Based on the FTIR data, it states that there is a relationship between carbon (C), hydrogen (H) and oxygen (O) which proves the formation of a graphene oxide layer. Also based on the results of XRD which states that the diffraction angle is in the range of 10o-90o and has the highest crystal size of 40.5267076 nm. Likewise, the results from SEM which stated that the best graphene oxide was at an average particle size of 81,4043598 nm. The resulting graphene oxide is also shaped like monolayer sheets.
Android-Based Measurement Design of Leg Muscle Power
Authors: Irsyad Muhammad , Yohandri - , Asrizal - , Ihsan Nurul
Published: November 2022

Leg muscle power is a combination of strength and speed, or maximal muscle performance at maximum speed. At this time the measurement of leg muscle power is still using manual tools that require a lot of people, and the measurement of leg muscle power is still lacking the jump distance. Based on the problems obtained, the author makes a production Android-based measurement design of leg muscle power. This study aims to determine the performance and specifications of Android-based measurement design of leg muscle power. This research is an engineering study to determine the performance specifications and design of an android-based leg muscle strength measurement tool. Based on the results of the analysis of the data obtained, the performance and design specifications of the tool are obtained. The performance specifications of the tool acquire the mechanical shape of the tool. The tool will automatically measure the strength of the leg muscles, and the measurement results can be viewed via Android. The design specifications are obtained from the characteristics of the sensor, accuracy and precision of the tool. Sensor characteristics can be seen from the load cell and ultrasonic sensors. The accuracy level of the leg muscle explosive power measurement tool obtained is 98.06%, and the instrument precision level obtained is 95.30%.
The Effect of Comparison of Polypropylene Plastic Waste Composition and Paper Sludge On Fiber Reinforced Composite Panels of Sugarcane Bags on Mechanical Properties
Authors: Dinny Ismathul , Darvina Yenni
Published: November 2022

Indonesia's landfills contain 15% of plastic waste. Of the total plastic waste, some are recycled and stored in the TPA. The remaining unmanaged will be wasted into the environment. Therefore, it is necessary to utilize waste so that it does not damage the environment, for example the use of waste into composite boards. Composite board made from polypropylene plastic wastepaper sludge and bagasse fiber. This study aims to see the effect of the composition of polypropylene plastic waste and the effect of paper sludge composition on the mechanical properties of composite panels. Composites are made using the hand lay-up method. The compositions used varied, namely 60% polypropylene plastic waste: 40% paper sludge, 50% polypropylene plastic waste: 50% paper sludge, 40% polypropylene plastic waste: 60% paper sludge with 2% bagasse fiber. Based on the results of research on the composition of polypropylene plastic waste of 60% and paper sludge composition of 40%, the highest tensile strength, compressive strength and hardness values were 11.86 N/mm2, 21.54 MPa and 6.33 HV. And the composition of plastic waste polypropylene by 40% and composition of paper sludge by 60% obtained the lowest tensile strength, compressive strength and hardness of 1.23 N/mm2, 9.77 MPa and 4.53 HV. From this study, it can be concluded that if the composition of polypropylene plastic waste is used more and more and the composition of paper sludge used is less, the value of mechanical properties will be higher. The value of the mechanical properties produced has met SNI
Effect of The Volume of Banana Fiber As A Polymer Composite Amplifier With Polyester Resin Matrix On The Sound Absorption of Acoustic Materials
Authors: Fauziah Rizka , Ramli - , Darvina Yenni , Ratnawulan -
Published: November 2022

Research has been carried out on the banana fiber effect as a polymer composite amplifier with polyester resin matrix on the sound absorption of acoustic materials. Sound Absorber material is made with a variation in the volume of banana fiber that is different from polyester resin. The volume of banana fiber  and polyester resin used  is  15% Fiber:    85%  Polyester Resin,  20%  Fiber:  80%  Polyester Resin, 25% Fiber: 25%  Fiber:    75%   Resin Polyester, 30%  Fiber:    70%  Polyester Resin, 35%  Fiber:    65%  Polyester Resin. So when made composite then the amount of banana fiber used and polyester resin is 100%. Research methods are carried out in the collection of banana fiber, composite manufacturing and testing of sound absorption properties using impedance tubes. The testing of coefficient sound reflection and also sound absorbance coefficient testing is done using sound level meter and signal generator by reference to principle the method of tube impedance via approach to the acoustic box. The banana fiber composite result and polyester resin are able to reflect the sound of highest which is 0.44 in a frequency 500 Hz with fiber 15%. While lowest sound reflection coefficient is 0.06 at a frequency of 8000 Hz and fiber 35%. While in the test the highest value absorbance coefficient that absorbs sound  is  =  0.94 at fiber volume  35%,  and frequency 8000 Hz, while the lowest sound coefficient is 0.56 in fiber 15% and frequency 500 HZ
Structure Analysis Of Graphene Micro Oxide From Old Coconut Shell Waste
Authors: Nanda Rika , Ramli -
Published: November 2022

Synthesis of graphene oxide from old coconut shell waste material. It has many applications, one of which is used as a microwave absorber. Old coconut shells are used as waste because the ingredients are easy to get. This study aims to analyze the microstructure of graphene oxide from old coconut shell waste. In the carbonization process using a furnace with temperature variations from 250˚C to 450˚C, the furnace time is 120 minutes. Making activated charcoal from old coconut shells using the modified hummers method with oxidizing agents KmnO2, H2SO4, and NaNO3. Characterization of graphene oxide from old coconut shell waste using FTIR, XRD and SEM. The test results using FTIR on GO samples show the formation of GO material where the sample contains functional groups containing bonds between carbon (C), Hydrogen (H) and Oxygen (O), the highest crystal size on XRD is 43.20800529 nm, and particle size the best SEM was obtained at GO 250˚C with a particle size of 65.701671 nm where the larger the particle size, the larger the surface pores of the sample, so that the better microwave absorbent was produced.
Design and Build a Straight Motion Experiment Set With Remote Laboratory Based on the Internet of Things
Authors: Putra Arif Farma , Asrizal - , Yohandri -
Published: November 2022

The era of the Industrial Revolution 4.0 is an era that has no boundaries to advance science-technology. Experimental tools are currently still using manual tools. The solution for the pandemic is a remote laboratory. Remote Laboratory is a remote laboratory using the internet with real components. This study aims to specification performance, design specifications on the experimental set of Uniform Motion with Remote Laboratory based on internet Of Things. The research carried out is included in engineering research. There are two methods of measuring data, namely direct measurement and indirect measurement. The experimental set has a size of 60x20 cm. The sensor used is infrared avoid obstacle which functions as a counter to the object's travel time. blynk application as tool control center. The Straight Motion experiment set with internet-based Remote Laboratory Of Things has an average accuracy of 98.6 % and an average accuracy of 0.96. The data that has been obtained shows that this experimental set can be used for GLB and GLBB.